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/HiddenEqualityWithBranches.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:50:50,657 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:50:50,659 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:50:50,671 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:50:50,671 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:50:50,673 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:50:50,674 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:50:50,677 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:50:50,679 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:50:50,681 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:50:50,683 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 23:50:50,683 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 23:50:50,684 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 23:50:50,685 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 23:50:50,688 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 23:50:50,689 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 23:50:50,690 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 23:50:50,693 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 23:50:50,695 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 23:50:50,700 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 23:50:50,701 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 23:50:50,702 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 23:50:50,705 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-30 23:50:50,705 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-30 23:50:50,705 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-30 23:50:50,706 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-30 23:50:50,707 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-30 23:50:50,708 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-30 23:50:50,708 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-30 23:50:50,709 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-30 23:50:50,710 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-30 23:50:50,710 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-30 23:50:50,710 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-30 23:50:50,711 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-30 23:50:50,712 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-30 23:50:50,712 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-30 23:50:50,713 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 23:50:50,728 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:50:50,728 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:50:50,729 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:50:50,729 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:50:50,730 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:50:50,730 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:50:50,730 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:50:50,730 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:50:50,731 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:50:50,731 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:50:50,731 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:50:50,731 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:50:50,731 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:50:50,731 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:50:50,732 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:50:50,732 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:50:50,732 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:50:50,732 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:50:50,732 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:50:50,733 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:50:50,733 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:50:50,733 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:50:50,733 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:50:50,733 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:50:50,734 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:50:50,734 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:50:50,734 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:50:50,734 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:50:50,734 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:50:50,735 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:50:50,793 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:50:50,809 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:50:50,815 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:50:50,816 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:50:50,817 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:50:50,818 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl [2018-09-30 23:50:50,818 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl' [2018-09-30 23:50:50,868 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:50:50,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:50:50,872 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:50:50,872 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:50:50,872 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:50:50,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:50:50" (1/1) ... [2018-09-30 23:50:50,905 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:50:50" (1/1) ... [2018-09-30 23:50:50,909 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 23:50:50,909 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 23:50:50,909 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 23:50:50,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:50:50,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:50:50,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:50:50,912 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:50:50,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:50:50" (1/1) ... [2018-09-30 23:50:50,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:50:50" (1/1) ... [2018-09-30 23:50:50,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:50:50" (1/1) ... [2018-09-30 23:50:50,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:50:50" (1/1) ... [2018-09-30 23:50:50,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:50:50" (1/1) ... [2018-09-30 23:50:50,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:50:50" (1/1) ... [2018-09-30 23:50:50,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:50:50" (1/1) ... [2018-09-30 23:50:50,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:50:50,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:50:50,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:50:50,933 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:50:50,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:50:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:50:51,008 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 23:50:51,008 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 23:50:51,009 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 23:50:51,286 INFO L345 CfgBuilder]: Using library mode [2018-09-30 23:50:51,287 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:50:51 BoogieIcfgContainer [2018-09-30 23:50:51,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:50:51,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:50:51,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:50:51,294 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:50:51,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:50:50" (1/2) ... [2018-09-30 23:50:51,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4890fccb and model type HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:50:51, skipping insertion in model container [2018-09-30 23:50:51,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:50:51" (2/2) ... [2018-09-30 23:50:51,299 INFO L112 eAbstractionObserver]: Analyzing ICFG HiddenEqualityWithBranches.bpl [2018-09-30 23:50:51,310 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:50:51,322 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:50:51,377 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:50:51,377 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:50:51,377 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:50:51,378 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:50:51,378 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:50:51,378 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:50:51,378 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:50:51,378 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:50:51,378 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:50:51,393 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 23:50:51,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-30 23:50:51,399 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:51,400 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-30 23:50:51,400 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:51,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:51,406 INFO L82 PathProgramCache]: Analyzing trace with hash 979, now seen corresponding path program 1 times [2018-09-30 23:50:51,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:51,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:51,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:51,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:51,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:51,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:51,584 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:50:51,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 23:50:51,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:50:51,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:50:51,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:50:51,608 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 23:50:51,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:51,730 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-09-30 23:50:51,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:50:51,732 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-30 23:50:51,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:51,743 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:50:51,743 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 23:50:51,747 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 [2018-09-30 23:50:51,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 23:50:51,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 23:50:51,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 23:50:51,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2018-09-30 23:50:51,786 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 9 transitions. Word has length 2 [2018-09-30 23:50:51,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:51,787 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 9 transitions. [2018-09-30 23:50:51,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:50:51,787 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 9 transitions. [2018-09-30 23:50:51,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 23:50:51,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:51,788 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 23:50:51,788 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:51,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:51,788 INFO L82 PathProgramCache]: Analyzing trace with hash 28757385, now seen corresponding path program 1 times [2018-09-30 23:50:51,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:51,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:51,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:51,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:51,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:51,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:51,876 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:50:51,876 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 23:50:51,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:50:51,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:50:51,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:50:51,879 INFO L87 Difference]: Start difference. First operand 7 states and 9 transitions. Second operand 3 states. [2018-09-30 23:50:51,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:51,932 INFO L93 Difference]: Finished difference Result 12 states and 17 transitions. [2018-09-30 23:50:51,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:50:51,934 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-09-30 23:50:51,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:51,935 INFO L225 Difference]: With dead ends: 12 [2018-09-30 23:50:51,935 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 23:50:51,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:50:51,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 23:50:51,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 23:50:51,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 23:50:51,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-30 23:50:51,939 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-30 23:50:51,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:51,940 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-30 23:50:51,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:50:51,940 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-30 23:50:51,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 23:50:51,940 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:51,941 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 23:50:51,941 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:51,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:51,941 INFO L82 PathProgramCache]: Analyzing trace with hash 28757447, now seen corresponding path program 1 times [2018-09-30 23:50:51,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:51,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:51,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:51,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:51,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:52,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:52,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:52,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:52,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:52,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:52,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-30 23:50:52,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:50:52,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:50:52,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:50:52,151 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-09-30 23:50:52,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:52,294 INFO L93 Difference]: Finished difference Result 14 states and 20 transitions. [2018-09-30 23:50:52,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:50:52,295 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-30 23:50:52,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:52,296 INFO L225 Difference]: With dead ends: 14 [2018-09-30 23:50:52,296 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 23:50:52,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:50:52,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 23:50:52,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 23:50:52,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 23:50:52,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-09-30 23:50:52,301 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 5 [2018-09-30 23:50:52,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:52,303 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-09-30 23:50:52,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:50:52,303 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-09-30 23:50:52,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:50:52,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:52,304 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2018-09-30 23:50:52,304 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:52,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:52,305 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203669, now seen corresponding path program 1 times [2018-09-30 23:50:52,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:52,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:52,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:52,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:52,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:52,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:52,467 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 [2018-09-30 23:50:52,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:52,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:52,542 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:52,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 23:50:52,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:50:52,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:50:52,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:50:52,544 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2018-09-30 23:50:52,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:52,574 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2018-09-30 23:50:52,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:50:52,575 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-30 23:50:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:52,576 INFO L225 Difference]: With dead ends: 15 [2018-09-30 23:50:52,576 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 23:50:52,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:50:52,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 23:50:52,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 23:50:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 23:50:52,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2018-09-30 23:50:52,581 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2018-09-30 23:50:52,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:52,582 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2018-09-30 23:50:52,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:50:52,582 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2018-09-30 23:50:52,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:50:52,583 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:52,584 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1] [2018-09-30 23:50:52,584 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:52,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:52,584 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203731, now seen corresponding path program 2 times [2018-09-30 23:50:52,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:52,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:52,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:52,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:52,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:52,673 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:52,673 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:52,682 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:50:52,695 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:50:52,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:52,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:52,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:52,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 23:50:52,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:50:52,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:50:52,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:50:52,728 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 5 states. [2018-09-30 23:50:52,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:52,763 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-09-30 23:50:52,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:50:52,765 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 23:50:52,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:52,766 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:50:52,766 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 23:50:52,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:50:52,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 23:50:52,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 23:50:52,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 23:50:52,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2018-09-30 23:50:52,770 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2018-09-30 23:50:52,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:52,771 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2018-09-30 23:50:52,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:50:52,771 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2018-09-30 23:50:52,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:50:52,771 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:52,771 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1] [2018-09-30 23:50:52,772 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:52,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:52,772 INFO L82 PathProgramCache]: Analyzing trace with hash 154849801, now seen corresponding path program 2 times [2018-09-30 23:50:52,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:52,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:52,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:52,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:52,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:52,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:52,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:52,866 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:50:52,878 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:50:52,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:52,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:52,912 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:52,912 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 23:50:52,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:50:52,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:50:52,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:50:52,914 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 5 states. [2018-09-30 23:50:53,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:53,059 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2018-09-30 23:50:53,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:50:53,060 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-09-30 23:50:53,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:53,061 INFO L225 Difference]: With dead ends: 18 [2018-09-30 23:50:53,061 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 23:50:53,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:50:53,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 23:50:53,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 23:50:53,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 23:50:53,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-30 23:50:53,067 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-09-30 23:50:53,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:53,067 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-30 23:50:53,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:50:53,067 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-30 23:50:53,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:50:53,068 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:53,068 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1] [2018-09-30 23:50:53,069 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:53,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:53,069 INFO L82 PathProgramCache]: Analyzing trace with hash 154849863, now seen corresponding path program 3 times [2018-09-30 23:50:53,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:53,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:53,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:53,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:53,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:53,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:53,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:53,229 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:50:53,250 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 23:50:53,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:53,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:53,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:53,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 23:50:53,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:50:53,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:50:53,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:50:53,292 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-09-30 23:50:53,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:53,332 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2018-09-30 23:50:53,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:50:53,332 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-09-30 23:50:53,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:53,333 INFO L225 Difference]: With dead ends: 20 [2018-09-30 23:50:53,333 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 23:50:53,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:50:53,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 23:50:53,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 23:50:53,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 23:50:53,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-30 23:50:53,338 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2018-09-30 23:50:53,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:53,338 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-30 23:50:53,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:50:53,339 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-30 23:50:53,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:50:53,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:53,339 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1] [2018-09-30 23:50:53,340 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:53,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:53,340 INFO L82 PathProgramCache]: Analyzing trace with hash 336984725, now seen corresponding path program 3 times [2018-09-30 23:50:53,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:53,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:53,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:53,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:53,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:53,447 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:53,447 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:53,456 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:50:53,467 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 23:50:53,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:53,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:53,716 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:53,737 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:53,737 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-30 23:50:53,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:50:53,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:50:53,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:50:53,738 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 11 states. [2018-09-30 23:50:54,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:54,217 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2018-09-30 23:50:54,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:50:54,217 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-09-30 23:50:54,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:54,218 INFO L225 Difference]: With dead ends: 23 [2018-09-30 23:50:54,218 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 23:50:54,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:50:54,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 23:50:54,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 23:50:54,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 23:50:54,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-09-30 23:50:54,223 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2018-09-30 23:50:54,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:54,223 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-09-30 23:50:54,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:50:54,224 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-09-30 23:50:54,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:50:54,224 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:54,224 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2018-09-30 23:50:54,225 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:54,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:54,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810761, now seen corresponding path program 4 times [2018-09-30 23:50:54,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:54,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:54,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:54,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:54,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:54,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:54,325 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:54,325 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:54,339 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:50:54,356 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:50:54,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:54,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:54,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:54,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:50:54,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:50:54,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:50:54,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:50:54,387 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2018-09-30 23:50:54,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:54,416 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-09-30 23:50:54,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:50:54,417 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-09-30 23:50:54,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:54,418 INFO L225 Difference]: With dead ends: 24 [2018-09-30 23:50:54,418 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 23:50:54,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:50:54,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 23:50:54,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 23:50:54,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:50:54,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-09-30 23:50:54,423 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-09-30 23:50:54,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:54,424 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-09-30 23:50:54,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:50:54,424 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-09-30 23:50:54,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:50:54,425 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:54,425 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1] [2018-09-30 23:50:54,425 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:54,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:54,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810823, now seen corresponding path program 4 times [2018-09-30 23:50:54,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:54,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:54,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:54,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:54,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:54,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:54,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:54,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:54,517 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:50:54,528 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:50:54,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:54,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:54,561 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:54,562 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:50:54,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:50:54,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:50:54,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:50:54,563 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2018-09-30 23:50:54,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:54,611 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2018-09-30 23:50:54,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:50:54,611 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-09-30 23:50:54,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:54,612 INFO L225 Difference]: With dead ends: 26 [2018-09-30 23:50:54,612 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 23:50:54,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:50:54,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 23:50:54,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 23:50:54,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:50:54,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-09-30 23:50:54,617 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2018-09-30 23:50:54,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:54,618 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-09-30 23:50:54,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:50:54,618 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-09-30 23:50:54,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:50:54,619 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:54,619 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1] [2018-09-30 23:50:54,619 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:54,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:54,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561067, now seen corresponding path program 5 times [2018-09-30 23:50:54,620 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:54,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:54,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:54,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:54,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:54,786 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:54,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:54,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:54,799 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:50:54,825 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:50:54,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:54,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:54,834 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:54,858 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:54,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:50:54,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:50:54,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:50:54,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:50:54,859 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2018-09-30 23:50:54,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:54,897 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-09-30 23:50:54,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:50:54,897 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-09-30 23:50:54,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:54,898 INFO L225 Difference]: With dead ends: 27 [2018-09-30 23:50:54,898 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:50:54,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:50:54,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:50:54,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 23:50:54,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 23:50:54,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-09-30 23:50:54,902 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2018-09-30 23:50:54,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:54,903 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-09-30 23:50:54,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:50:54,903 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-09-30 23:50:54,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:50:54,903 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:54,904 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1] [2018-09-30 23:50:54,904 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:54,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:54,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561005, now seen corresponding path program 5 times [2018-09-30 23:50:54,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:54,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:54,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:54,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:54,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:55,059 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:55,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:55,067 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:50:55,098 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:50:55,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:55,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:55,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:55,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:50:55,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:50:55,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:50:55,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:50:55,130 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 9 states. [2018-09-30 23:50:55,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:55,191 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-09-30 23:50:55,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:50:55,192 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2018-09-30 23:50:55,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:55,193 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:50:55,193 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 23:50:55,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:50:55,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 23:50:55,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 23:50:55,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 23:50:55,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-09-30 23:50:55,198 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2018-09-30 23:50:55,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:55,198 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-09-30 23:50:55,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:50:55,199 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-09-30 23:50:55,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 23:50:55,199 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:55,199 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1] [2018-09-30 23:50:55,200 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:55,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:55,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1729447159, now seen corresponding path program 6 times [2018-09-30 23:50:55,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:55,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:55,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:55,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:55,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:55,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:55,375 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:55,383 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:50:55,402 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:50:55,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:55,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:55,595 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:55,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:55,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-30 23:50:55,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:50:55,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:50:55,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:50:55,618 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 17 states. [2018-09-30 23:50:56,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:56,023 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2018-09-30 23:50:56,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:50:56,023 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 23 [2018-09-30 23:50:56,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:56,024 INFO L225 Difference]: With dead ends: 32 [2018-09-30 23:50:56,024 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 23:50:56,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:50:56,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 23:50:56,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 23:50:56,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:50:56,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-09-30 23:50:56,029 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-09-30 23:50:56,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:56,030 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-09-30 23:50:56,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:50:56,030 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-09-30 23:50:56,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:50:56,031 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:56,031 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1] [2018-09-30 23:50:56,031 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:56,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:56,032 INFO L82 PathProgramCache]: Analyzing trace with hash 468808085, now seen corresponding path program 7 times [2018-09-30 23:50:56,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:56,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:56,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:56,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:56,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:56,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:56,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:56,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:56,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:56,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:56,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:50:56,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:50:56,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:50:56,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:50:56,401 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2018-09-30 23:50:56,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:56,436 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-09-30 23:50:56,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:50:56,437 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2018-09-30 23:50:56,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:56,437 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:50:56,437 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:50:56,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:50:56,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:50:56,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 23:50:56,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 23:50:56,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-09-30 23:50:56,443 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2018-09-30 23:50:56,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:56,443 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-09-30 23:50:56,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:50:56,444 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-09-30 23:50:56,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:50:56,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:56,445 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1] [2018-09-30 23:50:56,445 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:56,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:56,445 INFO L82 PathProgramCache]: Analyzing trace with hash 468808147, now seen corresponding path program 6 times [2018-09-30 23:50:56,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:56,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:56,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:56,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:56,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:56,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:56,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:56,591 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:50:56,606 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 23:50:56,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:56,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:56,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:56,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:50:56,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:50:56,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:50:56,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:50:56,650 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 11 states. [2018-09-30 23:50:56,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:56,696 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-09-30 23:50:56,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:50:56,696 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2018-09-30 23:50:56,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:56,697 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:50:56,697 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:50:56,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:50:56,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:50:56,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 23:50:56,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 23:50:56,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-09-30 23:50:56,703 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2018-09-30 23:50:56,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:56,703 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-09-30 23:50:56,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:50:56,703 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-09-30 23:50:56,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 23:50:56,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:56,704 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1] [2018-09-30 23:50:56,705 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:56,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:56,705 INFO L82 PathProgramCache]: Analyzing trace with hash -970547319, now seen corresponding path program 8 times [2018-09-30 23:50:56,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:56,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:56,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:56,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:56,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:56,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:56,829 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:56,841 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:50:56,867 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:50:56,867 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:56,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:56,900 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:56,900 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:50:56,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:50:56,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:50:56,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:50:56,902 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2018-09-30 23:50:56,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:56,937 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2018-09-30 23:50:56,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:50:56,938 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-09-30 23:50:56,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:56,940 INFO L225 Difference]: With dead ends: 36 [2018-09-30 23:50:56,941 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 23:50:56,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:50:56,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 23:50:56,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 23:50:56,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:50:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-09-30 23:50:56,946 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-09-30 23:50:56,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:56,947 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-09-30 23:50:56,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:50:56,947 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-09-30 23:50:56,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 23:50:56,948 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:56,948 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1] [2018-09-30 23:50:56,949 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:56,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:56,949 INFO L82 PathProgramCache]: Analyzing trace with hash -970547257, now seen corresponding path program 7 times [2018-09-30 23:50:56,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:56,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:56,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:56,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:56,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:57,106 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:57,106 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:57,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:57,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:57,174 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:57,174 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:50:57,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:50:57,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:50:57,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:50:57,175 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 12 states. [2018-09-30 23:50:57,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:57,222 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2018-09-30 23:50:57,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:50:57,223 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2018-09-30 23:50:57,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:57,224 INFO L225 Difference]: With dead ends: 38 [2018-09-30 23:50:57,224 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 23:50:57,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:50:57,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 23:50:57,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 23:50:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:50:57,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-09-30 23:50:57,229 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2018-09-30 23:50:57,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:57,230 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-09-30 23:50:57,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:50:57,230 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-09-30 23:50:57,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 23:50:57,231 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:57,231 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1] [2018-09-30 23:50:57,231 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:57,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:57,232 INFO L82 PathProgramCache]: Analyzing trace with hash 146095381, now seen corresponding path program 9 times [2018-09-30 23:50:57,232 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:57,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:57,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:57,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:57,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:57,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:57,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:57,406 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:50:57,431 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-30 23:50:57,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:57,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:57,594 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:57,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:57,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-30 23:50:57,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:50:57,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:50:57,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:50:57,618 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 23 states. [2018-09-30 23:50:58,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:58,381 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2018-09-30 23:50:58,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:50:58,389 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2018-09-30 23:50:58,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:58,390 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:50:58,390 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:50:58,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=603, Invalid=1203, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:50:58,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:50:58,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 23:50:58,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 23:50:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-09-30 23:50:58,405 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2018-09-30 23:50:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:58,405 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-09-30 23:50:58,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:50:58,405 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-09-30 23:50:58,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 23:50:58,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:58,406 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1] [2018-09-30 23:50:58,407 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:58,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:58,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1527063561, now seen corresponding path program 10 times [2018-09-30 23:50:58,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:58,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:58,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:58,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:58,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:58,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:58,598 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:58,605 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:50:58,618 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:50:58,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:58,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:58,810 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:58,811 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-30 23:50:58,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 23:50:58,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 23:50:58,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:50:58,812 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 25 states. [2018-09-30 23:50:59,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:59,216 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2018-09-30 23:50:59,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:50:59,216 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 35 [2018-09-30 23:50:59,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:59,217 INFO L225 Difference]: With dead ends: 44 [2018-09-30 23:50:59,217 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 23:50:59,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=718, Invalid=1444, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:50:59,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 23:50:59,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 23:50:59,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 23:50:59,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-09-30 23:50:59,221 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2018-09-30 23:50:59,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:59,222 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-09-30 23:50:59,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 23:50:59,222 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-09-30 23:50:59,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 23:50:59,223 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:59,223 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1] [2018-09-30 23:50:59,223 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:59,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:59,223 INFO L82 PathProgramCache]: Analyzing trace with hash 458385557, now seen corresponding path program 11 times [2018-09-30 23:50:59,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:59,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:59,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:59,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:59,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:59,372 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:59,372 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:59,383 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:50:59,420 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 23:50:59,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:59,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:59,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:59,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 23:50:59,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:50:59,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:50:59,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:50:59,462 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 14 states. [2018-09-30 23:50:59,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:59,573 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2018-09-30 23:50:59,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:50:59,576 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2018-09-30 23:50:59,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:59,577 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:50:59,577 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:50:59,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:50:59,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:50:59,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 23:50:59,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 23:50:59,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-09-30 23:50:59,582 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2018-09-30 23:50:59,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:59,582 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-09-30 23:50:59,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:50:59,582 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-09-30 23:50:59,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 23:50:59,583 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:59,583 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1] [2018-09-30 23:50:59,584 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:59,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:59,584 INFO L82 PathProgramCache]: Analyzing trace with hash 458385619, now seen corresponding path program 8 times [2018-09-30 23:50:59,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:59,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:59,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:59,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:59,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:59,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:59,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:59,765 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:50:59,807 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:50:59,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:59,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:59,819 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:59,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:59,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 23:50:59,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:50:59,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:50:59,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:50:59,856 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2018-09-30 23:51:00,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:00,042 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2018-09-30 23:51:00,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:51:00,042 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2018-09-30 23:51:00,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:00,043 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:51:00,043 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:51:00,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:51:00,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:51:00,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 23:51:00,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 23:51:00,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-09-30 23:51:00,049 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2018-09-30 23:51:00,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:00,049 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-09-30 23:51:00,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:51:00,049 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-09-30 23:51:00,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 23:51:00,050 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:00,050 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1] [2018-09-30 23:51:00,050 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:00,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:00,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2064533641, now seen corresponding path program 12 times [2018-09-30 23:51:00,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:00,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:00,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:00,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:00,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:00,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:00,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:00,320 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:51:00,350 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-30 23:51:00,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:00,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:00,752 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:00,753 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-30 23:51:00,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:51:00,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:51:00,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:51:00,754 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 29 states. [2018-09-30 23:51:01,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:01,511 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2018-09-30 23:51:01,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:51:01,513 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 41 [2018-09-30 23:51:01,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:01,514 INFO L225 Difference]: With dead ends: 50 [2018-09-30 23:51:01,514 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 23:51:01,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=978, Invalid=1992, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:51:01,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 23:51:01,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 23:51:01,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 23:51:01,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-09-30 23:51:01,521 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2018-09-30 23:51:01,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:01,521 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-09-30 23:51:01,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:51:01,521 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-09-30 23:51:01,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 23:51:01,522 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:01,522 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1] [2018-09-30 23:51:01,522 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:01,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:01,523 INFO L82 PathProgramCache]: Analyzing trace with hash 591459349, now seen corresponding path program 13 times [2018-09-30 23:51:01,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:01,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:01,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:01,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:01,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:01,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:01,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:01,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:01,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:01,858 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:01,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:01,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 23:51:01,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:51:01,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:51:01,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:51:01,890 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2018-09-30 23:51:01,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:01,998 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2018-09-30 23:51:01,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:51:01,998 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-30 23:51:01,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:01,999 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:51:01,999 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:51:02,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:51:02,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:51:02,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 23:51:02,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 23:51:02,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-09-30 23:51:02,005 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2018-09-30 23:51:02,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:02,005 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-09-30 23:51:02,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:51:02,006 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-09-30 23:51:02,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 23:51:02,006 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:02,006 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1] [2018-09-30 23:51:02,007 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:02,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:02,007 INFO L82 PathProgramCache]: Analyzing trace with hash 591459411, now seen corresponding path program 9 times [2018-09-30 23:51:02,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:02,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:02,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:02,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:02,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:02,285 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:02,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:02,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:02,305 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:51:02,342 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 23:51:02,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:02,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:02,387 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:02,388 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 23:51:02,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:51:02,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:51:02,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:51:02,389 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 17 states. [2018-09-30 23:51:02,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:02,651 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2018-09-30 23:51:02,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:51:02,651 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2018-09-30 23:51:02,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:02,652 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:51:02,652 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:51:02,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:51:02,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:51:02,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 23:51:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 23:51:02,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-09-30 23:51:02,658 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2018-09-30 23:51:02,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:02,658 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-09-30 23:51:02,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:51:02,658 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-09-30 23:51:02,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 23:51:02,659 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:02,659 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1] [2018-09-30 23:51:02,660 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:02,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:02,660 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910391, now seen corresponding path program 14 times [2018-09-30 23:51:02,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:02,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:02,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:02,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:02,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:02,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:02,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:02,841 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:51:02,857 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:51:02,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:02,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:02,898 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:02,898 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 23:51:02,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:51:02,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:51:02,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:51:02,899 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 17 states. [2018-09-30 23:51:02,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:02,941 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2018-09-30 23:51:02,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:51:02,942 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2018-09-30 23:51:02,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:02,943 INFO L225 Difference]: With dead ends: 54 [2018-09-30 23:51:02,943 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 23:51:02,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:51:02,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 23:51:02,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 23:51:02,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 23:51:02,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-09-30 23:51:02,947 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-09-30 23:51:02,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:02,948 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-09-30 23:51:02,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:51:02,948 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-09-30 23:51:02,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 23:51:02,948 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:02,949 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1] [2018-09-30 23:51:02,949 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:02,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:02,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910329, now seen corresponding path program 10 times [2018-09-30 23:51:02,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:02,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:02,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:02,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:02,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:03,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:03,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:03,695 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:51:03,718 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:51:03,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:03,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:03,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:03,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 23:51:03,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:51:03,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:51:03,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:51:03,760 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 18 states. [2018-09-30 23:51:03,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:03,844 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2018-09-30 23:51:03,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:51:03,844 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2018-09-30 23:51:03,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:03,845 INFO L225 Difference]: With dead ends: 56 [2018-09-30 23:51:03,845 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 23:51:03,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:51:03,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 23:51:03,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 23:51:03,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 23:51:03,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-09-30 23:51:03,849 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2018-09-30 23:51:03,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:03,849 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-09-30 23:51:03,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:51:03,853 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-09-30 23:51:03,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 23:51:03,854 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:03,854 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1] [2018-09-30 23:51:03,854 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:03,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:03,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1979244437, now seen corresponding path program 15 times [2018-09-30 23:51:03,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:03,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:03,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:03,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:03,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:04,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:04,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:04,251 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:51:04,279 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-09-30 23:51:04,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:04,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:04,579 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:04,579 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-30 23:51:04,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 23:51:04,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 23:51:04,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:51:04,581 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 35 states. [2018-09-30 23:51:05,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:05,746 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2018-09-30 23:51:05,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:51:05,747 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 50 [2018-09-30 23:51:05,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:05,747 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:51:05,748 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:51:05,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1443, Invalid=2979, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:51:05,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:51:05,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 23:51:05,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 23:51:05,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-09-30 23:51:05,754 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2018-09-30 23:51:05,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:05,754 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-09-30 23:51:05,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 23:51:05,754 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-09-30 23:51:05,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 23:51:05,755 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:05,755 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1] [2018-09-30 23:51:05,755 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:05,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:05,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545079, now seen corresponding path program 16 times [2018-09-30 23:51:05,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:05,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:05,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:05,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:05,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:05,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:05,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:05,934 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:51:05,952 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:51:05,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:05,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:05,982 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:05,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 23:51:05,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:51:05,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:51:05,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:51:05,983 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 19 states. [2018-09-30 23:51:06,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:06,049 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2018-09-30 23:51:06,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:51:06,049 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2018-09-30 23:51:06,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:06,050 INFO L225 Difference]: With dead ends: 60 [2018-09-30 23:51:06,050 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 23:51:06,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:51:06,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 23:51:06,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 23:51:06,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 23:51:06,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-09-30 23:51:06,054 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-09-30 23:51:06,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:06,054 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-09-30 23:51:06,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:51:06,054 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-09-30 23:51:06,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 23:51:06,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:06,055 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1] [2018-09-30 23:51:06,055 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:06,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:06,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545017, now seen corresponding path program 11 times [2018-09-30 23:51:06,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:06,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:06,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:06,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:06,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:07,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:07,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:07,051 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:51:07,078 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 23:51:07,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:07,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:07,121 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:07,121 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 23:51:07,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:51:07,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:51:07,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:51:07,122 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 20 states. [2018-09-30 23:51:07,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:07,179 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2018-09-30 23:51:07,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:51:07,179 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2018-09-30 23:51:07,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:07,180 INFO L225 Difference]: With dead ends: 62 [2018-09-30 23:51:07,180 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 23:51:07,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:51:07,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 23:51:07,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 23:51:07,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 23:51:07,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-09-30 23:51:07,185 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2018-09-30 23:51:07,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:07,185 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-09-30 23:51:07,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:51:07,185 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-09-30 23:51:07,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 23:51:07,186 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:07,186 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1] [2018-09-30 23:51:07,186 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:07,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:07,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364501, now seen corresponding path program 17 times [2018-09-30 23:51:07,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:07,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:07,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:07,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:07,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:07,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:07,422 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:07,430 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:51:07,459 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 23:51:07,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:07,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:07,500 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:07,500 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 23:51:07,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:51:07,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:51:07,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:51:07,501 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 20 states. [2018-09-30 23:51:07,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:07,586 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2018-09-30 23:51:07,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:51:07,586 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2018-09-30 23:51:07,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:07,587 INFO L225 Difference]: With dead ends: 63 [2018-09-30 23:51:07,587 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:51:07,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:51:07,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:51:07,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 23:51:07,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 23:51:07,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-09-30 23:51:07,592 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2018-09-30 23:51:07,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:07,592 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-09-30 23:51:07,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:51:07,592 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-09-30 23:51:07,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 23:51:07,593 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:07,593 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1] [2018-09-30 23:51:07,593 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:07,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:07,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364563, now seen corresponding path program 12 times [2018-09-30 23:51:07,594 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:07,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:07,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:07,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:07,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:07,946 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:07,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:07,953 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:51:07,986 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 23:51:07,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:07,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:08,030 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:08,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 23:51:08,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:51:08,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:51:08,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:51:08,031 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 21 states. [2018-09-30 23:51:08,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:08,088 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2018-09-30 23:51:08,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:51:08,088 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2018-09-30 23:51:08,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:08,089 INFO L225 Difference]: With dead ends: 65 [2018-09-30 23:51:08,090 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 23:51:08,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:51:08,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 23:51:08,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 23:51:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 23:51:08,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-09-30 23:51:08,094 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2018-09-30 23:51:08,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:08,094 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-09-30 23:51:08,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:51:08,094 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-09-30 23:51:08,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 23:51:08,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:08,095 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1] [2018-09-30 23:51:08,095 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:08,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:08,095 INFO L82 PathProgramCache]: Analyzing trace with hash -411470327, now seen corresponding path program 18 times [2018-09-30 23:51:08,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:08,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:08,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:08,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:08,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:08,448 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 19 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:08,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:08,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:08,457 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:51:08,493 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-30 23:51:08,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:08,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:08,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:08,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-30 23:51:08,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 23:51:08,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 23:51:08,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:51:08,874 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 41 states. [2018-09-30 23:51:09,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:09,887 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2018-09-30 23:51:09,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:51:09,888 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 59 [2018-09-30 23:51:09,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:09,889 INFO L225 Difference]: With dead ends: 68 [2018-09-30 23:51:09,889 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 23:51:09,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1998, Invalid=4164, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:51:09,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 23:51:09,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 23:51:09,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 23:51:09,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-09-30 23:51:09,895 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2018-09-30 23:51:09,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:09,896 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-09-30 23:51:09,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 23:51:09,896 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-09-30 23:51:09,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 23:51:09,896 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:09,896 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1] [2018-09-30 23:51:09,897 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:09,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:09,897 INFO L82 PathProgramCache]: Analyzing trace with hash -274409835, now seen corresponding path program 19 times [2018-09-30 23:51:09,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:09,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:09,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:09,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:09,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:10,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:10,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:10,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:10,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:10,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:10,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 23:51:10,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:51:10,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:51:10,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:51:10,577 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 22 states. [2018-09-30 23:51:10,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:10,631 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2018-09-30 23:51:10,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:51:10,631 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2018-09-30 23:51:10,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:10,632 INFO L225 Difference]: With dead ends: 69 [2018-09-30 23:51:10,632 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 23:51:10,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:51:10,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 23:51:10,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 23:51:10,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 23:51:10,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-09-30 23:51:10,635 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2018-09-30 23:51:10,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:10,635 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-09-30 23:51:10,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:51:10,636 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-09-30 23:51:10,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 23:51:10,636 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:10,636 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1] [2018-09-30 23:51:10,637 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:10,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:10,637 INFO L82 PathProgramCache]: Analyzing trace with hash -274409773, now seen corresponding path program 13 times [2018-09-30 23:51:10,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:10,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:10,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:10,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:10,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:10,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:10,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:10,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:10,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:10,960 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:10,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 23:51:10,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:51:10,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:51:10,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:51:10,961 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 23 states. [2018-09-30 23:51:11,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:11,017 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2018-09-30 23:51:11,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:51:11,017 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2018-09-30 23:51:11,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:11,019 INFO L225 Difference]: With dead ends: 71 [2018-09-30 23:51:11,019 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 23:51:11,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:51:11,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 23:51:11,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 23:51:11,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 23:51:11,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-09-30 23:51:11,023 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 62 [2018-09-30 23:51:11,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:11,023 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-09-30 23:51:11,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:51:11,023 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-09-30 23:51:11,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 23:51:11,024 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:11,024 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1] [2018-09-30 23:51:11,024 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:11,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:11,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191159, now seen corresponding path program 20 times [2018-09-30 23:51:11,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:11,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:11,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:11,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:11,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:11,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:11,299 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:11,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:11,305 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:51:11,326 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:51:11,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:11,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:11,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:11,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 23:51:11,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:51:11,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:51:11,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:51:11,362 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 23 states. [2018-09-30 23:51:11,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:11,408 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2018-09-30 23:51:11,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:51:11,408 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2018-09-30 23:51:11,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:11,409 INFO L225 Difference]: With dead ends: 72 [2018-09-30 23:51:11,409 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 23:51:11,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:51:11,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 23:51:11,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 23:51:11,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 23:51:11,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-09-30 23:51:11,414 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-09-30 23:51:11,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:11,414 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-09-30 23:51:11,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:51:11,415 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-09-30 23:51:11,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 23:51:11,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:11,415 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1] [2018-09-30 23:51:11,415 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:11,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:11,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191097, now seen corresponding path program 14 times [2018-09-30 23:51:11,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:11,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:11,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:11,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:11,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:11,670 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:11,670 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:11,671 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:11,679 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:51:11,712 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:51:11,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:11,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:11,725 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:11,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:11,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 23:51:11,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:51:11,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:51:11,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:51:11,746 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 24 states. [2018-09-30 23:51:11,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:11,828 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2018-09-30 23:51:11,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:51:11,829 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2018-09-30 23:51:11,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:11,830 INFO L225 Difference]: With dead ends: 74 [2018-09-30 23:51:11,830 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 23:51:11,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:51:11,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 23:51:11,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 23:51:11,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 23:51:11,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-09-30 23:51:11,835 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2018-09-30 23:51:11,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:11,835 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-09-30 23:51:11,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:51:11,835 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-09-30 23:51:11,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 23:51:11,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:11,836 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1] [2018-09-30 23:51:11,836 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:11,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:11,837 INFO L82 PathProgramCache]: Analyzing trace with hash -544677355, now seen corresponding path program 21 times [2018-09-30 23:51:11,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:11,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:11,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:11,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:11,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 22 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:12,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:12,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:12,128 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:51:12,164 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-09-30 23:51:12,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:12,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:12,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:12,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-30 23:51:12,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 23:51:12,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 23:51:12,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:51:12,658 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 47 states. [2018-09-30 23:51:13,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:13,874 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2018-09-30 23:51:13,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:51:13,875 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 68 [2018-09-30 23:51:13,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:13,876 INFO L225 Difference]: With dead ends: 77 [2018-09-30 23:51:13,876 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 23:51:13,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2643, Invalid=5547, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:51:13,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 23:51:13,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 23:51:13,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 23:51:13,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-09-30 23:51:13,880 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 68 [2018-09-30 23:51:13,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:13,880 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-09-30 23:51:13,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 23:51:13,880 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-09-30 23:51:13,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 23:51:13,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:13,881 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1] [2018-09-30 23:51:13,881 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:13,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:13,882 INFO L82 PathProgramCache]: Analyzing trace with hash -95199479, now seen corresponding path program 22 times [2018-09-30 23:51:13,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:13,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:13,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:13,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:13,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:13,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 23 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:14,211 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:14,211 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:14,228 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:51:14,255 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:51:14,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:14,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:14,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:14,746 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-30 23:51:14,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 23:51:14,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 23:51:14,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:51:14,747 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 49 states. [2018-09-30 23:51:16,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:16,314 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2018-09-30 23:51:16,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:51:16,315 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 71 [2018-09-30 23:51:16,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:16,316 INFO L225 Difference]: With dead ends: 80 [2018-09-30 23:51:16,316 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 23:51:16,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2878, Invalid=6052, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:51:16,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 23:51:16,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 23:51:16,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 23:51:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-09-30 23:51:16,323 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2018-09-30 23:51:16,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:16,324 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-09-30 23:51:16,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 23:51:16,324 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-09-30 23:51:16,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 23:51:16,324 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:16,324 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1] [2018-09-30 23:51:16,324 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:16,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:16,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824491, now seen corresponding path program 23 times [2018-09-30 23:51:16,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:16,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:16,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:16,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:16,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:16,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:16,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:16,654 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:51:16,696 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 23:51:16,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:16,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:16,712 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:16,732 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:16,732 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 23:51:16,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:51:16,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:51:16,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:51:16,733 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 26 states. [2018-09-30 23:51:16,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:16,875 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2018-09-30 23:51:16,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:51:16,876 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2018-09-30 23:51:16,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:16,877 INFO L225 Difference]: With dead ends: 81 [2018-09-30 23:51:16,877 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 23:51:16,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:51:16,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 23:51:16,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 23:51:16,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 23:51:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2018-09-30 23:51:16,881 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2018-09-30 23:51:16,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:16,882 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2018-09-30 23:51:16,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:51:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2018-09-30 23:51:16,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 23:51:16,882 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:16,882 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1] [2018-09-30 23:51:16,883 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:16,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:16,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824429, now seen corresponding path program 15 times [2018-09-30 23:51:16,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:16,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:16,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:16,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:16,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:17,544 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:17,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:17,544 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:17,552 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:51:17,600 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-09-30 23:51:17,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:17,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:17,654 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:17,654 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 23:51:17,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 23:51:17,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 23:51:17,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:51:17,655 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 27 states. [2018-09-30 23:51:17,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:17,780 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2018-09-30 23:51:17,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:51:17,780 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 74 [2018-09-30 23:51:17,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:17,782 INFO L225 Difference]: With dead ends: 83 [2018-09-30 23:51:17,782 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 23:51:17,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:51:17,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 23:51:17,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 23:51:17,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 23:51:17,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2018-09-30 23:51:17,787 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2018-09-30 23:51:17,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:17,787 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2018-09-30 23:51:17,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 23:51:17,787 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2018-09-30 23:51:17,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 23:51:17,788 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:17,788 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1] [2018-09-30 23:51:17,788 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:17,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:17,789 INFO L82 PathProgramCache]: Analyzing trace with hash -142326903, now seen corresponding path program 24 times [2018-09-30 23:51:17,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:17,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:17,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:17,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:17,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:18,362 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 25 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:18,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:18,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:18,370 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:51:18,411 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-30 23:51:18,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:18,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:18,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:18,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-30 23:51:18,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 23:51:18,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 23:51:18,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:51:18,938 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 53 states. [2018-09-30 23:51:20,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:20,292 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2018-09-30 23:51:20,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 23:51:20,293 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 77 [2018-09-30 23:51:20,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:20,294 INFO L225 Difference]: With dead ends: 86 [2018-09-30 23:51:20,294 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 23:51:20,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3378, Invalid=7128, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 23:51:20,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 23:51:20,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 23:51:20,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 23:51:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-09-30 23:51:20,299 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 77 [2018-09-30 23:51:20,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:20,300 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-09-30 23:51:20,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 23:51:20,300 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-09-30 23:51:20,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 23:51:20,300 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:20,300 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1] [2018-09-30 23:51:20,301 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:20,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:20,301 INFO L82 PathProgramCache]: Analyzing trace with hash -926607083, now seen corresponding path program 25 times [2018-09-30 23:51:20,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:20,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:20,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:20,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:20,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:21,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:21,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:21,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:21,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:21,104 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:21,104 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 23:51:21,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:51:21,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:51:21,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:51:21,105 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 28 states. [2018-09-30 23:51:21,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:21,174 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2018-09-30 23:51:21,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 23:51:21,175 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2018-09-30 23:51:21,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:21,176 INFO L225 Difference]: With dead ends: 87 [2018-09-30 23:51:21,176 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 23:51:21,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:51:21,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 23:51:21,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 23:51:21,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 23:51:21,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2018-09-30 23:51:21,181 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2018-09-30 23:51:21,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:21,182 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2018-09-30 23:51:21,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:51:21,182 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2018-09-30 23:51:21,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 23:51:21,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:21,182 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1] [2018-09-30 23:51:21,183 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:21,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:21,183 INFO L82 PathProgramCache]: Analyzing trace with hash -926607021, now seen corresponding path program 16 times [2018-09-30 23:51:21,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:21,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:21,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:21,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:21,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:21,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:21,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:21,579 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:51:21,602 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:51:21,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:21,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:21,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:21,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 23:51:21,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:51:21,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:51:21,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:51:21,635 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 29 states. [2018-09-30 23:51:21,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:21,695 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2018-09-30 23:51:21,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:51:21,696 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 80 [2018-09-30 23:51:21,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:21,697 INFO L225 Difference]: With dead ends: 89 [2018-09-30 23:51:21,697 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 23:51:21,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:51:21,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 23:51:21,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 23:51:21,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 23:51:21,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-09-30 23:51:21,701 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 80 [2018-09-30 23:51:21,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:21,702 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-09-30 23:51:21,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:51:21,702 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-09-30 23:51:21,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 23:51:21,702 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:21,702 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1] [2018-09-30 23:51:21,703 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:21,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:21,703 INFO L82 PathProgramCache]: Analyzing trace with hash -795359223, now seen corresponding path program 26 times [2018-09-30 23:51:21,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:21,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:21,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:21,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:21,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:22,377 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:22,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:22,387 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:51:22,411 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:51:22,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:22,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:22,447 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:22,447 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 23:51:22,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:51:22,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:51:22,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:51:22,448 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 29 states. [2018-09-30 23:51:22,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:22,494 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2018-09-30 23:51:22,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:51:22,494 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 83 [2018-09-30 23:51:22,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:22,495 INFO L225 Difference]: With dead ends: 90 [2018-09-30 23:51:22,495 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 23:51:22,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:51:22,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 23:51:22,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 23:51:22,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 23:51:22,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-09-30 23:51:22,500 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-09-30 23:51:22,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:22,500 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-09-30 23:51:22,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:51:22,500 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-09-30 23:51:22,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 23:51:22,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:22,500 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1] [2018-09-30 23:51:22,501 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:22,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:22,501 INFO L82 PathProgramCache]: Analyzing trace with hash -795359161, now seen corresponding path program 17 times [2018-09-30 23:51:22,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:22,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:22,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:22,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:22,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:23,548 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:23,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:23,566 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:51:23,608 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 23:51:23,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:23,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:23,646 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:23,647 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 23:51:23,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:51:23,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:51:23,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:51:23,647 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 30 states. [2018-09-30 23:51:23,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:23,697 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2018-09-30 23:51:23,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 23:51:23,697 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2018-09-30 23:51:23,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:23,698 INFO L225 Difference]: With dead ends: 92 [2018-09-30 23:51:23,699 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 23:51:23,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:51:23,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 23:51:23,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 23:51:23,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 23:51:23,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-09-30 23:51:23,703 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 83 [2018-09-30 23:51:23,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:23,703 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-09-30 23:51:23,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:51:23,703 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-09-30 23:51:23,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 23:51:23,703 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:23,704 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1] [2018-09-30 23:51:23,704 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:23,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:23,704 INFO L82 PathProgramCache]: Analyzing trace with hash 789398677, now seen corresponding path program 27 times [2018-09-30 23:51:23,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:23,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:23,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:23,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:23,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:24,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 28 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:24,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:24,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:24,226 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:51:24,273 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-09-30 23:51:24,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:24,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:24,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:24,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-30 23:51:24,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 23:51:24,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 23:51:24,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=2523, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:51:24,959 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 59 states. [2018-09-30 23:51:27,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:27,056 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2018-09-30 23:51:27,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:51:27,056 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 86 [2018-09-30 23:51:27,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:27,058 INFO L225 Difference]: With dead ends: 95 [2018-09-30 23:51:27,058 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 23:51:27,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4203, Invalid=8907, Unknown=0, NotChecked=0, Total=13110 [2018-09-30 23:51:27,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 23:51:27,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 23:51:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 23:51:27,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-09-30 23:51:27,063 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-09-30 23:51:27,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:27,064 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-09-30 23:51:27,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 23:51:27,064 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-09-30 23:51:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 23:51:27,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:27,065 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1] [2018-09-30 23:51:27,065 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:27,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:27,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2031479945, now seen corresponding path program 28 times [2018-09-30 23:51:27,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:27,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:27,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:27,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:27,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:27,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:27,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:27,476 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:51:27,503 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:51:27,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:27,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:27,539 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:27,539 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 23:51:27,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 23:51:27,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 23:51:27,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:51:27,540 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 31 states. [2018-09-30 23:51:27,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:27,648 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2018-09-30 23:51:27,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:51:27,649 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 89 [2018-09-30 23:51:27,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:27,650 INFO L225 Difference]: With dead ends: 96 [2018-09-30 23:51:27,650 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 23:51:27,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:51:27,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 23:51:27,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 23:51:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 23:51:27,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-09-30 23:51:27,653 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-09-30 23:51:27,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:27,654 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-09-30 23:51:27,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 23:51:27,654 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-09-30 23:51:27,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 23:51:27,654 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:27,654 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1] [2018-09-30 23:51:27,654 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:27,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:27,655 INFO L82 PathProgramCache]: Analyzing trace with hash 2031480007, now seen corresponding path program 18 times [2018-09-30 23:51:27,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:27,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:27,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:27,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:27,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:28,075 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:28,075 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:28,083 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:51:28,132 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-09-30 23:51:28,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:28,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:28,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:28,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:28,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 23:51:28,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:51:28,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:51:28,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:51:28,187 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 32 states. [2018-09-30 23:51:28,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:28,721 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2018-09-30 23:51:28,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:51:28,722 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 89 [2018-09-30 23:51:28,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:28,723 INFO L225 Difference]: With dead ends: 98 [2018-09-30 23:51:28,723 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 23:51:28,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:51:28,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 23:51:28,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 23:51:28,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 23:51:28,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-09-30 23:51:28,729 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 89 [2018-09-30 23:51:28,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:28,729 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-09-30 23:51:28,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:51:28,729 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-09-30 23:51:28,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 23:51:28,730 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:28,730 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1] [2018-09-30 23:51:28,730 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:28,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:28,730 INFO L82 PathProgramCache]: Analyzing trace with hash -563687403, now seen corresponding path program 29 times [2018-09-30 23:51:28,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:28,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:28,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:28,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:28,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:29,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:29,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:29,232 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:51:29,294 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 23:51:29,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:29,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:29,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:29,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 23:51:29,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:51:29,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:51:29,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:51:29,331 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 32 states. [2018-09-30 23:51:29,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:29,432 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2018-09-30 23:51:29,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:51:29,432 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2018-09-30 23:51:29,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:29,433 INFO L225 Difference]: With dead ends: 99 [2018-09-30 23:51:29,433 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 23:51:29,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:51:29,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 23:51:29,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 23:51:29,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 23:51:29,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-09-30 23:51:29,439 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2018-09-30 23:51:29,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:29,439 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-09-30 23:51:29,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:51:29,440 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-09-30 23:51:29,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 23:51:29,440 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:29,440 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1] [2018-09-30 23:51:29,440 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:29,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:29,441 INFO L82 PathProgramCache]: Analyzing trace with hash -563687341, now seen corresponding path program 19 times [2018-09-30 23:51:29,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:29,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:29,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:29,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:29,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:30,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:30,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:30,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:30,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:30,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:30,675 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 23:51:30,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 23:51:30,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 23:51:30,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:51:30,676 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 33 states. [2018-09-30 23:51:30,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:30,773 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2018-09-30 23:51:30,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 23:51:30,773 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 92 [2018-09-30 23:51:30,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:30,774 INFO L225 Difference]: With dead ends: 101 [2018-09-30 23:51:30,775 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 23:51:30,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:51:30,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 23:51:30,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 23:51:30,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 23:51:30,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2018-09-30 23:51:30,779 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 92 [2018-09-30 23:51:30,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:30,780 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2018-09-30 23:51:30,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 23:51:30,780 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2018-09-30 23:51:30,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 23:51:30,780 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:30,781 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1] [2018-09-30 23:51:30,781 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:30,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:30,781 INFO L82 PathProgramCache]: Analyzing trace with hash 512143625, now seen corresponding path program 30 times [2018-09-30 23:51:30,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:30,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:30,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:30,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:30,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:31,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 31 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:31,504 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:31,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:31,511 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:51:31,562 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-09-30 23:51:31,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:31,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:32,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:32,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-30 23:51:32,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 23:51:32,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 23:51:32,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1088, Invalid=3072, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:51:32,375 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 65 states. [2018-09-30 23:51:34,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:34,503 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2018-09-30 23:51:34,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:51:34,504 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 95 [2018-09-30 23:51:34,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:34,505 INFO L225 Difference]: With dead ends: 104 [2018-09-30 23:51:34,505 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 23:51:34,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5118, Invalid=10884, Unknown=0, NotChecked=0, Total=16002 [2018-09-30 23:51:34,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 23:51:34,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 23:51:34,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 23:51:34,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-09-30 23:51:34,512 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 95 [2018-09-30 23:51:34,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:34,513 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-09-30 23:51:34,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 23:51:34,513 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-09-30 23:51:34,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 23:51:34,514 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:34,514 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1] [2018-09-30 23:51:34,514 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:34,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:34,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336021, now seen corresponding path program 31 times [2018-09-30 23:51:34,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:34,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:34,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:34,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:34,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:35,222 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:35,222 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:35,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:35,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:35,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:35,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 23:51:35,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:51:35,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:51:35,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:51:35,291 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 34 states. [2018-09-30 23:51:35,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:35,341 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2018-09-30 23:51:35,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:51:35,342 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 98 [2018-09-30 23:51:35,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:35,343 INFO L225 Difference]: With dead ends: 105 [2018-09-30 23:51:35,343 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 23:51:35,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:51:35,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 23:51:35,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 23:51:35,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 23:51:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-09-30 23:51:35,348 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2018-09-30 23:51:35,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:35,349 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-09-30 23:51:35,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:51:35,349 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-09-30 23:51:35,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 23:51:35,350 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:35,350 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1] [2018-09-30 23:51:35,350 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:35,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:35,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336083, now seen corresponding path program 20 times [2018-09-30 23:51:35,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:35,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:35,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:35,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:35,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:35,870 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:35,870 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:35,879 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:51:35,906 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:51:35,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:35,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:35,943 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:35,944 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 23:51:35,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 23:51:35,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 23:51:35,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:51:35,945 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 35 states. [2018-09-30 23:51:36,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:36,081 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2018-09-30 23:51:36,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:51:36,081 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 98 [2018-09-30 23:51:36,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:36,082 INFO L225 Difference]: With dead ends: 107 [2018-09-30 23:51:36,082 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 23:51:36,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:51:36,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 23:51:36,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 23:51:36,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 23:51:36,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2018-09-30 23:51:36,087 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2018-09-30 23:51:36,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:36,088 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2018-09-30 23:51:36,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 23:51:36,088 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2018-09-30 23:51:36,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 23:51:36,089 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:36,089 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1] [2018-09-30 23:51:36,089 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:36,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:36,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918391, now seen corresponding path program 32 times [2018-09-30 23:51:36,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:36,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:36,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:36,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:36,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:36,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:37,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:37,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:37,098 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:51:37,149 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:51:37,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:37,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:37,198 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:37,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 23:51:37,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 23:51:37,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 23:51:37,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:51:37,200 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 35 states. [2018-09-30 23:51:37,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:37,310 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2018-09-30 23:51:37,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:51:37,310 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 101 [2018-09-30 23:51:37,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:37,312 INFO L225 Difference]: With dead ends: 108 [2018-09-30 23:51:37,312 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 23:51:37,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:51:37,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 23:51:37,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 23:51:37,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 23:51:37,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-09-30 23:51:37,317 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-09-30 23:51:37,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:37,317 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-09-30 23:51:37,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 23:51:37,317 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-09-30 23:51:37,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 23:51:37,318 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:37,318 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1] [2018-09-30 23:51:37,318 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:37,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:37,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918329, now seen corresponding path program 21 times [2018-09-30 23:51:37,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:37,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:37,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:37,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:37,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:37,932 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:37,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:37,939 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:51:37,997 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 23:51:37,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:38,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:38,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:38,048 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 23:51:38,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:51:38,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:51:38,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:51:38,049 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 36 states. [2018-09-30 23:51:38,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:38,227 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2018-09-30 23:51:38,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:51:38,227 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 101 [2018-09-30 23:51:38,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:38,229 INFO L225 Difference]: With dead ends: 110 [2018-09-30 23:51:38,229 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 23:51:38,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:51:38,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 23:51:38,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 23:51:38,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 23:51:38,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-09-30 23:51:38,234 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 101 [2018-09-30 23:51:38,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:38,234 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-09-30 23:51:38,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:51:38,234 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-09-30 23:51:38,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 23:51:38,235 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:38,235 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1] [2018-09-30 23:51:38,235 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:38,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:38,235 INFO L82 PathProgramCache]: Analyzing trace with hash 875431701, now seen corresponding path program 33 times [2018-09-30 23:51:38,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:38,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:38,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:38,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:38,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:38,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 34 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:38,843 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:38,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:38,849 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:51:38,936 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-09-30 23:51:38,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:38,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:39,898 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:39,898 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-30 23:51:39,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 23:51:39,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 23:51:39,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=3675, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:51:39,900 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 71 states. [2018-09-30 23:51:42,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:42,465 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2018-09-30 23:51:42,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 23:51:42,465 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 104 [2018-09-30 23:51:42,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:42,466 INFO L225 Difference]: With dead ends: 113 [2018-09-30 23:51:42,466 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 23:51:42,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3433 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6123, Invalid=13059, Unknown=0, NotChecked=0, Total=19182 [2018-09-30 23:51:42,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 23:51:42,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 23:51:42,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 23:51:42,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2018-09-30 23:51:42,472 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 104 [2018-09-30 23:51:42,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:42,472 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2018-09-30 23:51:42,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 23:51:42,472 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2018-09-30 23:51:42,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 23:51:42,473 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:42,473 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1] [2018-09-30 23:51:42,473 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:42,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:42,473 INFO L82 PathProgramCache]: Analyzing trace with hash 945822217, now seen corresponding path program 34 times [2018-09-30 23:51:42,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:42,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:42,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:42,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:42,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:43,119 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:43,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:43,127 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:51:43,160 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:51:43,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:43,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:43,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:43,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 23:51:43,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 23:51:43,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 23:51:43,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:51:43,198 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 37 states. [2018-09-30 23:51:43,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:43,764 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2018-09-30 23:51:43,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:51:43,764 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 107 [2018-09-30 23:51:43,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:43,765 INFO L225 Difference]: With dead ends: 114 [2018-09-30 23:51:43,765 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 23:51:43,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:51:43,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 23:51:43,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 23:51:43,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 23:51:43,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-09-30 23:51:43,772 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-09-30 23:51:43,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:43,772 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-09-30 23:51:43,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 23:51:43,772 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-09-30 23:51:43,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 23:51:43,773 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:43,773 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1] [2018-09-30 23:51:43,773 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:43,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:43,774 INFO L82 PathProgramCache]: Analyzing trace with hash 945822279, now seen corresponding path program 22 times [2018-09-30 23:51:43,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:43,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:43,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:43,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:43,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:43,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:45,988 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:45,988 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:45,996 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:51:46,029 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:51:46,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:46,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:46,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:46,065 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:46,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 23:51:46,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:51:46,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:51:46,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:51:46,067 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 38 states. [2018-09-30 23:51:46,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:46,126 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-09-30 23:51:46,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 23:51:46,127 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 107 [2018-09-30 23:51:46,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:46,128 INFO L225 Difference]: With dead ends: 116 [2018-09-30 23:51:46,128 INFO L226 Difference]: Without dead ends: 112 [2018-09-30 23:51:46,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:51:46,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-30 23:51:46,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-30 23:51:46,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 23:51:46,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-09-30 23:51:46,133 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-09-30 23:51:46,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:46,133 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-09-30 23:51:46,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:51:46,133 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-09-30 23:51:46,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 23:51:46,134 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:46,134 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1] [2018-09-30 23:51:46,134 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:46,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:46,135 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643925, now seen corresponding path program 35 times [2018-09-30 23:51:46,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:46,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:46,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:46,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:46,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:46,993 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:46,993 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:47,000 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:51:47,062 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 23:51:47,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:47,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:47,108 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:47,108 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 23:51:47,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:51:47,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:51:47,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:51:47,109 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 38 states. [2018-09-30 23:51:47,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:47,216 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2018-09-30 23:51:47,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 23:51:47,216 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 110 [2018-09-30 23:51:47,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:47,217 INFO L225 Difference]: With dead ends: 117 [2018-09-30 23:51:47,217 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 23:51:47,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:51:47,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 23:51:47,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 23:51:47,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 23:51:47,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2018-09-30 23:51:47,223 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2018-09-30 23:51:47,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:47,223 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2018-09-30 23:51:47,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:51:47,224 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2018-09-30 23:51:47,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 23:51:47,224 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:47,224 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1] [2018-09-30 23:51:47,224 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:47,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:47,225 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643987, now seen corresponding path program 23 times [2018-09-30 23:51:47,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:47,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:47,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:47,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:47,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:47,897 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:47,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:47,908 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:51:47,970 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 23:51:47,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:47,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:48,015 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:48,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 23:51:48,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 23:51:48,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 23:51:48,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:51:48,016 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 39 states. [2018-09-30 23:51:48,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:48,112 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2018-09-30 23:51:48,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:51:48,113 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 110 [2018-09-30 23:51:48,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:48,114 INFO L225 Difference]: With dead ends: 119 [2018-09-30 23:51:48,114 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 23:51:48,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:51:48,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 23:51:48,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 23:51:48,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 23:51:48,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-09-30 23:51:48,118 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 110 [2018-09-30 23:51:48,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:48,119 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-09-30 23:51:48,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 23:51:48,119 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-09-30 23:51:48,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 23:51:48,119 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:48,119 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1] [2018-09-30 23:51:48,120 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:48,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:48,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1445413239, now seen corresponding path program 36 times [2018-09-30 23:51:48,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:48,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:48,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:48,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:48,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:48,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 37 proven. 1998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:48,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:48,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:48,814 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:51:48,876 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-30 23:51:48,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:48,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:50,087 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:50,087 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-30 23:51:50,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 23:51:50,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 23:51:50,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1520, Invalid=4332, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:51:50,088 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 77 states. [2018-09-30 23:51:53,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:53,089 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2018-09-30 23:51:53,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 23:51:53,089 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 113 [2018-09-30 23:51:53,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:53,090 INFO L225 Difference]: With dead ends: 122 [2018-09-30 23:51:53,091 INFO L226 Difference]: Without dead ends: 118 [2018-09-30 23:51:53,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=7218, Invalid=15432, Unknown=0, NotChecked=0, Total=22650 [2018-09-30 23:51:53,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-30 23:51:53,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-30 23:51:53,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-30 23:51:53,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-09-30 23:51:53,096 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 113 [2018-09-30 23:51:53,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:53,096 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-09-30 23:51:53,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 23:51:53,097 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-09-30 23:51:53,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 23:51:53,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:53,097 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1] [2018-09-30 23:51:53,098 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:53,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:53,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745685, now seen corresponding path program 37 times [2018-09-30 23:51:53,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:53,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:53,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:53,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:53,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:55,864 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:55,864 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:55,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:55,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:55,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:55,982 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:55,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 23:51:55,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 23:51:55,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 23:51:55,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:51:55,983 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 40 states. [2018-09-30 23:51:56,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:56,234 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2018-09-30 23:51:56,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 23:51:56,235 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 116 [2018-09-30 23:51:56,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:56,236 INFO L225 Difference]: With dead ends: 123 [2018-09-30 23:51:56,236 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 23:51:56,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:51:56,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 23:51:56,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 23:51:56,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 23:51:56,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-09-30 23:51:56,240 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2018-09-30 23:51:56,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:56,240 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-09-30 23:51:56,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 23:51:56,241 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-09-30 23:51:56,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 23:51:56,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:56,241 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 1, 1] [2018-09-30 23:51:56,242 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:56,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:56,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745747, now seen corresponding path program 24 times [2018-09-30 23:51:56,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:56,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:56,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:56,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:56,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:57,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:57,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:57,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:57,982 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:51:58,415 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-09-30 23:51:58,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:58,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:58,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:58,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 23:51:58,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 23:51:58,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 23:51:58,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:51:58,472 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 41 states. [2018-09-30 23:51:58,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:58,599 INFO L93 Difference]: Finished difference Result 125 states and 131 transitions. [2018-09-30 23:51:58,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:51:58,600 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 116 [2018-09-30 23:51:58,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:58,601 INFO L225 Difference]: With dead ends: 125 [2018-09-30 23:51:58,601 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 23:51:58,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:51:58,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 23:51:58,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 23:51:58,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 23:51:58,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-09-30 23:51:58,608 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 116 [2018-09-30 23:51:58,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:58,608 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-09-30 23:51:58,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 23:51:58,608 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-09-30 23:51:58,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 23:51:58,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:58,608 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1] [2018-09-30 23:51:58,609 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:58,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:58,609 INFO L82 PathProgramCache]: Analyzing trace with hash 308544265, now seen corresponding path program 38 times [2018-09-30 23:51:58,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:58,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:58,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:58,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:58,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:59,558 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:59,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:59,576 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:51:59,629 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:51:59,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:59,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:59,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:59,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 23:51:59,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 23:51:59,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 23:51:59,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:51:59,680 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 41 states. [2018-09-30 23:51:59,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:59,785 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2018-09-30 23:51:59,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:51:59,786 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 119 [2018-09-30 23:51:59,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:59,786 INFO L225 Difference]: With dead ends: 126 [2018-09-30 23:51:59,787 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 23:51:59,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:51:59,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 23:51:59,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-30 23:51:59,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-30 23:51:59,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-09-30 23:51:59,790 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 119 [2018-09-30 23:51:59,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:59,790 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-09-30 23:51:59,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 23:51:59,790 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-09-30 23:51:59,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 23:51:59,791 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:59,791 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 1, 1] [2018-09-30 23:51:59,791 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:59,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:59,791 INFO L82 PathProgramCache]: Analyzing trace with hash 308544327, now seen corresponding path program 25 times [2018-09-30 23:51:59,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:59,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:59,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:59,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:59,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:00,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:00,598 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:00,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:00,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:00,718 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:00,718 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 23:52:00,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:52:00,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:52:00,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:52:00,719 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 42 states. [2018-09-30 23:52:00,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:00,864 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2018-09-30 23:52:00,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 23:52:00,864 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 119 [2018-09-30 23:52:00,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:00,865 INFO L225 Difference]: With dead ends: 128 [2018-09-30 23:52:00,866 INFO L226 Difference]: Without dead ends: 124 [2018-09-30 23:52:00,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:52:00,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-30 23:52:00,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-30 23:52:00,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-30 23:52:00,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2018-09-30 23:52:00,869 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 119 [2018-09-30 23:52:00,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:00,869 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2018-09-30 23:52:00,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:52:00,869 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2018-09-30 23:52:00,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 23:52:00,870 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:00,870 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1] [2018-09-30 23:52:00,870 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:00,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:00,871 INFO L82 PathProgramCache]: Analyzing trace with hash 613624213, now seen corresponding path program 39 times [2018-09-30 23:52:00,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:00,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:00,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:00,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:00,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 40 proven. 2340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:01,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:01,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:01,580 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:52:01,663 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-09-30 23:52:01,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:01,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:03,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:03,235 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-30 23:52:03,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 23:52:03,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 23:52:03,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1763, Invalid=5043, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:52:03,237 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 83 states. [2018-09-30 23:52:06,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:06,509 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2018-09-30 23:52:06,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 23:52:06,509 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 122 [2018-09-30 23:52:06,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:06,511 INFO L225 Difference]: With dead ends: 131 [2018-09-30 23:52:06,511 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 23:52:06,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4759 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=8403, Invalid=18003, Unknown=0, NotChecked=0, Total=26406 [2018-09-30 23:52:06,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 23:52:06,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 23:52:06,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 23:52:06,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2018-09-30 23:52:06,516 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2018-09-30 23:52:06,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:06,516 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2018-09-30 23:52:06,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 23:52:06,517 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2018-09-30 23:52:06,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-30 23:52:06,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:06,517 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1] [2018-09-30 23:52:06,518 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:06,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:06,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556745, now seen corresponding path program 40 times [2018-09-30 23:52:06,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:06,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:06,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:06,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:06,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:07,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:07,507 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:07,520 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:52:07,558 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:52:07,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:07,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:07,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:07,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 23:52:07,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 23:52:07,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 23:52:07,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:52:07,607 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 43 states. [2018-09-30 23:52:07,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:07,674 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2018-09-30 23:52:07,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:52:07,675 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 125 [2018-09-30 23:52:07,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:07,676 INFO L225 Difference]: With dead ends: 132 [2018-09-30 23:52:07,676 INFO L226 Difference]: Without dead ends: 128 [2018-09-30 23:52:07,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:52:07,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-30 23:52:07,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-30 23:52:07,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-30 23:52:07,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2018-09-30 23:52:07,680 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 125 [2018-09-30 23:52:07,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:07,681 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2018-09-30 23:52:07,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 23:52:07,681 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2018-09-30 23:52:07,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-30 23:52:07,681 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:07,681 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 1, 1] [2018-09-30 23:52:07,682 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:07,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:07,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556807, now seen corresponding path program 26 times [2018-09-30 23:52:07,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:07,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:07,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:07,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:07,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:08,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:08,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:08,378 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:52:08,417 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:52:08,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:08,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:08,477 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:08,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 23:52:08,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:52:08,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:52:08,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:52:08,478 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 44 states. [2018-09-30 23:52:09,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:09,717 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2018-09-30 23:52:09,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 23:52:09,718 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 125 [2018-09-30 23:52:09,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:09,719 INFO L225 Difference]: With dead ends: 134 [2018-09-30 23:52:09,719 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 23:52:09,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:52:09,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 23:52:09,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-30 23:52:09,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-30 23:52:09,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-09-30 23:52:09,725 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 125 [2018-09-30 23:52:09,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:09,725 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-09-30 23:52:09,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:52:09,726 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-09-30 23:52:09,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 23:52:09,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:09,726 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1] [2018-09-30 23:52:09,727 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:09,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:09,727 INFO L82 PathProgramCache]: Analyzing trace with hash -819137259, now seen corresponding path program 41 times [2018-09-30 23:52:09,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:09,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:09,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:09,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:09,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:09,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:10,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:10,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:10,512 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:10,520 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:52:10,770 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-30 23:52:10,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:10,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:10,831 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:10,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 23:52:10,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:52:10,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:52:10,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:52:10,832 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 44 states. [2018-09-30 23:52:11,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:11,101 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2018-09-30 23:52:11,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 23:52:11,102 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 128 [2018-09-30 23:52:11,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:11,103 INFO L225 Difference]: With dead ends: 135 [2018-09-30 23:52:11,103 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 23:52:11,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:52:11,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 23:52:11,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 23:52:11,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 23:52:11,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-09-30 23:52:11,106 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 128 [2018-09-30 23:52:11,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:11,106 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-09-30 23:52:11,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:52:11,106 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-09-30 23:52:11,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 23:52:11,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:11,107 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 1, 1] [2018-09-30 23:52:11,107 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:11,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:11,107 INFO L82 PathProgramCache]: Analyzing trace with hash -819137197, now seen corresponding path program 27 times [2018-09-30 23:52:11,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:11,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:11,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:11,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:11,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:12,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:12,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:12,036 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:52:12,117 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 43 check-sat command(s) [2018-09-30 23:52:12,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:12,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:12,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:12,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:12,182 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 23:52:12,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 23:52:12,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 23:52:12,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:52:12,183 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 45 states. [2018-09-30 23:52:12,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:12,319 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2018-09-30 23:52:12,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:52:12,320 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 128 [2018-09-30 23:52:12,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:12,321 INFO L225 Difference]: With dead ends: 137 [2018-09-30 23:52:12,321 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 23:52:12,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:52:12,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 23:52:12,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 23:52:12,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 23:52:12,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-09-30 23:52:12,326 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-09-30 23:52:12,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:12,326 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-09-30 23:52:12,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 23:52:12,326 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-09-30 23:52:12,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-30 23:52:12,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:12,327 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1] [2018-09-30 23:52:12,327 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:12,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:12,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1087532041, now seen corresponding path program 42 times [2018-09-30 23:52:12,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:12,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:12,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:12,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:12,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 43 proven. 2709 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:13,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:13,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:13,159 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:52:13,231 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-09-30 23:52:13,231 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:13,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:14,818 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:14,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-30 23:52:14,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 23:52:14,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 23:52:14,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2024, Invalid=5808, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:52:14,820 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 89 states. [2018-09-30 23:52:18,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:18,687 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2018-09-30 23:52:18,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 23:52:18,688 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 131 [2018-09-30 23:52:18,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:18,689 INFO L225 Difference]: With dead ends: 140 [2018-09-30 23:52:18,689 INFO L226 Difference]: Without dead ends: 136 [2018-09-30 23:52:18,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5503 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9678, Invalid=20772, Unknown=0, NotChecked=0, Total=30450 [2018-09-30 23:52:18,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-30 23:52:18,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-30 23:52:18,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 23:52:18,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-09-30 23:52:18,693 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 131 [2018-09-30 23:52:18,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:18,694 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-09-30 23:52:18,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 23:52:18,694 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-09-30 23:52:18,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 23:52:18,694 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:18,694 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 1, 1, 1] [2018-09-30 23:52:18,694 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:18,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:18,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158741, now seen corresponding path program 43 times [2018-09-30 23:52:18,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:18,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:18,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:18,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:18,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:19,492 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:19,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:19,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:19,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:19,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:19,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:19,582 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:19,582 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 23:52:19,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:52:19,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:52:19,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:52:19,583 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 46 states. [2018-09-30 23:52:19,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:19,668 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2018-09-30 23:52:19,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 23:52:19,669 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 134 [2018-09-30 23:52:19,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:19,670 INFO L225 Difference]: With dead ends: 141 [2018-09-30 23:52:19,670 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 23:52:19,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:52:19,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 23:52:19,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-30 23:52:19,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 23:52:19,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2018-09-30 23:52:19,675 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 134 [2018-09-30 23:52:19,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:19,675 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2018-09-30 23:52:19,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:52:19,675 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2018-09-30 23:52:19,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 23:52:19,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:19,676 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 1, 1] [2018-09-30 23:52:19,676 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:19,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:19,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158803, now seen corresponding path program 28 times [2018-09-30 23:52:19,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:19,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:19,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:19,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:19,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:20,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:20,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:20,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:20,477 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:52:20,517 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:52:20,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:20,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:20,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:20,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 23:52:20,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 23:52:20,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 23:52:20,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:52:20,561 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 47 states. [2018-09-30 23:52:20,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:20,638 INFO L93 Difference]: Finished difference Result 143 states and 149 transitions. [2018-09-30 23:52:20,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:52:20,638 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 134 [2018-09-30 23:52:20,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:20,640 INFO L225 Difference]: With dead ends: 143 [2018-09-30 23:52:20,640 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 23:52:20,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:52:20,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 23:52:20,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 23:52:20,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 23:52:20,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2018-09-30 23:52:20,644 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 134 [2018-09-30 23:52:20,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:20,645 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2018-09-30 23:52:20,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 23:52:20,645 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2018-09-30 23:52:20,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-30 23:52:20,645 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:20,645 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 1, 1, 1] [2018-09-30 23:52:20,646 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:20,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:20,646 INFO L82 PathProgramCache]: Analyzing trace with hash -742027127, now seen corresponding path program 44 times [2018-09-30 23:52:20,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:20,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:20,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:20,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:20,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:21,444 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:21,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:21,451 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:52:21,492 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:52:21,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:21,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:21,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:21,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 23:52:21,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 23:52:21,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 23:52:21,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:52:21,557 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 47 states. [2018-09-30 23:52:21,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:21,751 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2018-09-30 23:52:21,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:52:21,751 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 137 [2018-09-30 23:52:21,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:21,753 INFO L225 Difference]: With dead ends: 144 [2018-09-30 23:52:21,753 INFO L226 Difference]: Without dead ends: 140 [2018-09-30 23:52:21,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:52:21,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-30 23:52:21,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-30 23:52:21,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-30 23:52:21,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2018-09-30 23:52:21,758 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 137 [2018-09-30 23:52:21,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:21,759 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2018-09-30 23:52:21,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 23:52:21,759 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2018-09-30 23:52:21,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-30 23:52:21,760 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:21,760 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1] [2018-09-30 23:52:21,760 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:21,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:21,760 INFO L82 PathProgramCache]: Analyzing trace with hash -742027065, now seen corresponding path program 29 times [2018-09-30 23:52:21,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:21,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:21,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:21,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:21,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:22,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:22,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:22,981 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:52:23,058 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 23:52:23,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:23,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:23,103 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:23,103 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 23:52:23,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:52:23,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:52:23,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:52:23,104 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 48 states. [2018-09-30 23:52:23,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:23,240 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2018-09-30 23:52:23,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:52:23,240 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 137 [2018-09-30 23:52:23,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:23,241 INFO L225 Difference]: With dead ends: 146 [2018-09-30 23:52:23,241 INFO L226 Difference]: Without dead ends: 142 [2018-09-30 23:52:23,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:52:23,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-30 23:52:23,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-30 23:52:23,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-30 23:52:23,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2018-09-30 23:52:23,245 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 137 [2018-09-30 23:52:23,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:23,246 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2018-09-30 23:52:23,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:52:23,246 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2018-09-30 23:52:23,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 23:52:23,247 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:23,247 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1] [2018-09-30 23:52:23,247 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:23,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:23,247 INFO L82 PathProgramCache]: Analyzing trace with hash 467971093, now seen corresponding path program 45 times [2018-09-30 23:52:23,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:23,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:23,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:23,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:23,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:24,244 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:24,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:24,252 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:52:24,348 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-09-30 23:52:24,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:24,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:24,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:24,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 23:52:24,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:52:24,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:52:24,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:52:24,397 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 48 states. [2018-09-30 23:52:24,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:24,468 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2018-09-30 23:52:24,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:52:24,469 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 140 [2018-09-30 23:52:24,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:24,470 INFO L225 Difference]: With dead ends: 147 [2018-09-30 23:52:24,470 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 23:52:24,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:52:24,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 23:52:24,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-30 23:52:24,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 23:52:24,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-09-30 23:52:24,475 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 140 [2018-09-30 23:52:24,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:24,476 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-09-30 23:52:24,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:52:24,476 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-09-30 23:52:24,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 23:52:24,477 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:24,477 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1] [2018-09-30 23:52:24,477 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:24,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:24,477 INFO L82 PathProgramCache]: Analyzing trace with hash 467971155, now seen corresponding path program 30 times [2018-09-30 23:52:24,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:24,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:24,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:24,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:24,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:25,566 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:25,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:25,573 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:52:25,663 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-09-30 23:52:25,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:25,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:25,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:25,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:25,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 23:52:25,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 23:52:25,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 23:52:25,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:52:25,726 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 49 states. [2018-09-30 23:52:26,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:26,877 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2018-09-30 23:52:26,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:52:26,878 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 140 [2018-09-30 23:52:26,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:26,879 INFO L225 Difference]: With dead ends: 149 [2018-09-30 23:52:26,879 INFO L226 Difference]: Without dead ends: 145 [2018-09-30 23:52:26,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:52:26,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-30 23:52:26,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-30 23:52:26,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 23:52:26,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-09-30 23:52:26,884 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 140 [2018-09-30 23:52:26,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:26,884 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-09-30 23:52:26,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 23:52:26,884 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-09-30 23:52:26,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-30 23:52:26,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:26,885 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1] [2018-09-30 23:52:26,886 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:26,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:26,886 INFO L82 PathProgramCache]: Analyzing trace with hash -135572215, now seen corresponding path program 46 times [2018-09-30 23:52:26,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:26,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:26,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:26,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:26,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:26,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 47 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:28,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:28,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:28,913 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:52:28,955 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:52:28,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:28,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:30,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:30,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:30,933 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-30 23:52:30,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 23:52:30,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 23:52:30,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2400, Invalid=6912, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:52:30,935 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 97 states. [2018-09-30 23:52:35,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:35,648 INFO L93 Difference]: Finished difference Result 152 states and 159 transitions. [2018-09-30 23:52:35,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 23:52:35,649 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 143 [2018-09-30 23:52:35,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:35,650 INFO L225 Difference]: With dead ends: 152 [2018-09-30 23:52:35,650 INFO L226 Difference]: Without dead ends: 148 [2018-09-30 23:52:35,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6579 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=11518, Invalid=24772, Unknown=0, NotChecked=0, Total=36290 [2018-09-30 23:52:35,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-30 23:52:35,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-30 23:52:35,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-30 23:52:35,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2018-09-30 23:52:35,655 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 143 [2018-09-30 23:52:35,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:35,656 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2018-09-30 23:52:35,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 23:52:35,656 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2018-09-30 23:52:35,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 23:52:35,656 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:35,657 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 1, 1, 1] [2018-09-30 23:52:35,657 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:35,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:35,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159787, now seen corresponding path program 47 times [2018-09-30 23:52:35,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:35,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:35,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:35,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:35,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:36,558 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:36,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:36,566 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:52:36,653 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 23:52:36,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:36,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:36,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:36,718 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 23:52:36,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:52:36,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:52:36,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:52:36,719 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 50 states. [2018-09-30 23:52:36,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:36,817 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2018-09-30 23:52:36,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 23:52:36,817 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 146 [2018-09-30 23:52:36,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:36,818 INFO L225 Difference]: With dead ends: 153 [2018-09-30 23:52:36,818 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 23:52:36,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:52:36,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 23:52:36,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 23:52:36,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 23:52:36,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2018-09-30 23:52:36,823 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 146 [2018-09-30 23:52:36,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:36,823 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2018-09-30 23:52:36,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:52:36,824 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2018-09-30 23:52:36,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 23:52:36,824 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:36,824 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 1, 1] [2018-09-30 23:52:36,824 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:36,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:36,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159725, now seen corresponding path program 31 times [2018-09-30 23:52:36,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:36,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:36,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:36,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:36,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:38,032 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:38,032 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:38,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:38,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:38,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:38,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 23:52:38,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 23:52:38,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 23:52:38,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:52:38,128 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 51 states. [2018-09-30 23:52:38,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:38,273 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2018-09-30 23:52:38,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:52:38,274 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 146 [2018-09-30 23:52:38,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:38,275 INFO L225 Difference]: With dead ends: 155 [2018-09-30 23:52:38,275 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 23:52:38,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:52:38,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 23:52:38,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 23:52:38,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 23:52:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-09-30 23:52:38,280 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 146 [2018-09-30 23:52:38,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:38,280 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-09-30 23:52:38,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 23:52:38,280 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-09-30 23:52:38,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-30 23:52:38,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:38,281 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 1, 1, 1] [2018-09-30 23:52:38,281 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:38,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:38,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1691072905, now seen corresponding path program 48 times [2018-09-30 23:52:38,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:38,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:38,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:38,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:38,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 49 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:39,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:39,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:39,225 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:52:39,315 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-09-30 23:52:39,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:39,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 0 proven. 3577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:41,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:41,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-30 23:52:41,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 23:52:41,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 23:52:41,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2600, Invalid=7500, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:52:41,188 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 101 states. [2018-09-30 23:52:46,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:46,025 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2018-09-30 23:52:46,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 23:52:46,026 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 149 [2018-09-30 23:52:46,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:46,027 INFO L225 Difference]: With dead ends: 158 [2018-09-30 23:52:46,027 INFO L226 Difference]: Without dead ends: 154 [2018-09-30 23:52:46,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7153 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=12498, Invalid=26904, Unknown=0, NotChecked=0, Total=39402 [2018-09-30 23:52:46,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-30 23:52:46,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-30 23:52:46,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-30 23:52:46,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2018-09-30 23:52:46,034 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 149 [2018-09-30 23:52:46,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:46,034 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2018-09-30 23:52:46,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 23:52:46,034 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2018-09-30 23:52:46,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 23:52:46,035 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:46,035 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 1, 1, 1] [2018-09-30 23:52:46,036 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:46,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:46,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030187, now seen corresponding path program 49 times [2018-09-30 23:52:46,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:46,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:46,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:46,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:46,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:47,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:47,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:47,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:47,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:47,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:47,105 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:47,105 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 23:52:47,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 23:52:47,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 23:52:47,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:52:47,106 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 52 states. [2018-09-30 23:52:47,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:47,475 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2018-09-30 23:52:47,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 23:52:47,475 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 152 [2018-09-30 23:52:47,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:47,476 INFO L225 Difference]: With dead ends: 159 [2018-09-30 23:52:47,476 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 23:52:47,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:52:47,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 23:52:47,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 23:52:47,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 23:52:47,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-09-30 23:52:47,483 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2018-09-30 23:52:47,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:47,484 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-09-30 23:52:47,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 23:52:47,484 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-09-30 23:52:47,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 23:52:47,484 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:47,485 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 1, 1] [2018-09-30 23:52:47,485 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:47,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:47,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030125, now seen corresponding path program 32 times [2018-09-30 23:52:47,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:47,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:47,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:47,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:47,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:48,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:48,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:48,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:48,899 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:52:48,946 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:52:48,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:48,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:48,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:48,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 23:52:48,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 23:52:48,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 23:52:48,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:52:48,995 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 53 states. [2018-09-30 23:52:49,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:49,130 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2018-09-30 23:52:49,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 23:52:49,130 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 152 [2018-09-30 23:52:49,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:49,132 INFO L225 Difference]: With dead ends: 161 [2018-09-30 23:52:49,132 INFO L226 Difference]: Without dead ends: 157 [2018-09-30 23:52:49,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:52:49,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-30 23:52:49,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-30 23:52:49,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 23:52:49,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-09-30 23:52:49,137 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 152 [2018-09-30 23:52:49,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:49,137 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-09-30 23:52:49,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 23:52:49,138 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-09-30 23:52:49,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-30 23:52:49,138 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:49,139 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 1, 1, 1] [2018-09-30 23:52:49,139 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:49,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:49,139 INFO L82 PathProgramCache]: Analyzing trace with hash 200195593, now seen corresponding path program 50 times [2018-09-30 23:52:49,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:49,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:49,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:49,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:49,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:50,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:50,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:50,178 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:52:50,233 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:52:50,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:50,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:50,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:50,288 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 23:52:50,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 23:52:50,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 23:52:50,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:52:50,289 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 53 states. [2018-09-30 23:52:50,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:50,436 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2018-09-30 23:52:50,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 23:52:50,437 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 155 [2018-09-30 23:52:50,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:50,438 INFO L225 Difference]: With dead ends: 162 [2018-09-30 23:52:50,438 INFO L226 Difference]: Without dead ends: 158 [2018-09-30 23:52:50,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:52:50,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-30 23:52:50,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-30 23:52:50,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-30 23:52:50,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2018-09-30 23:52:50,443 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 155 [2018-09-30 23:52:50,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:50,443 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2018-09-30 23:52:50,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 23:52:50,444 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2018-09-30 23:52:50,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-30 23:52:50,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:50,445 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 1, 1] [2018-09-30 23:52:50,445 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:50,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:50,445 INFO L82 PathProgramCache]: Analyzing trace with hash 200195655, now seen corresponding path program 33 times [2018-09-30 23:52:50,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:50,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:50,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:50,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:50,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:51,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:51,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:51,528 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:52:51,627 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-30 23:52:51,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:51,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:51,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:51,691 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:51,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 23:52:51,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 23:52:51,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 23:52:51,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:52:51,693 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 54 states. [2018-09-30 23:52:51,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:51,854 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2018-09-30 23:52:51,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 23:52:51,855 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 155 [2018-09-30 23:52:51,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:51,856 INFO L225 Difference]: With dead ends: 164 [2018-09-30 23:52:51,856 INFO L226 Difference]: Without dead ends: 160 [2018-09-30 23:52:51,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:52:51,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-30 23:52:51,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-30 23:52:51,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-30 23:52:51,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2018-09-30 23:52:51,860 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 155 [2018-09-30 23:52:51,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:51,860 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2018-09-30 23:52:51,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 23:52:51,860 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2018-09-30 23:52:51,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 23:52:51,861 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:51,861 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 1, 1, 1] [2018-09-30 23:52:51,862 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:51,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:51,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1681224043, now seen corresponding path program 51 times [2018-09-30 23:52:51,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:51,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:51,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:51,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:51,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 52 proven. 3978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:53,189 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:53,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:53,198 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:52:53,293 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2018-09-30 23:52:53,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:53,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:55,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:55,405 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:55,405 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-30 23:52:55,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 23:52:55,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 23:52:55,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2915, Invalid=8427, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:52:55,407 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 107 states. [2018-09-30 23:53:00,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:00,720 INFO L93 Difference]: Finished difference Result 167 states and 174 transitions. [2018-09-30 23:53:00,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 23:53:00,721 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 158 [2018-09-30 23:53:00,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:00,722 INFO L225 Difference]: With dead ends: 167 [2018-09-30 23:53:00,722 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 23:53:00,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8059 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=14043, Invalid=30267, Unknown=0, NotChecked=0, Total=44310 [2018-09-30 23:53:00,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 23:53:00,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 23:53:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 23:53:00,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2018-09-30 23:53:00,728 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 158 [2018-09-30 23:53:00,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:00,729 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2018-09-30 23:53:00,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 23:53:00,729 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2018-09-30 23:53:00,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-30 23:53:00,730 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:00,730 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 1, 1, 1] [2018-09-30 23:53:00,730 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:00,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:00,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387319, now seen corresponding path program 52 times [2018-09-30 23:53:00,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:00,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:00,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:00,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:00,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:01,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:01,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:01,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:01,774 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:53:01,833 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:53:01,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:01,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:01,883 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:01,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 23:53:01,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 23:53:01,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 23:53:01,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:53:01,885 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand 55 states. [2018-09-30 23:53:02,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:02,031 INFO L93 Difference]: Finished difference Result 168 states and 173 transitions. [2018-09-30 23:53:02,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:53:02,031 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 161 [2018-09-30 23:53:02,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:02,032 INFO L225 Difference]: With dead ends: 168 [2018-09-30 23:53:02,032 INFO L226 Difference]: Without dead ends: 164 [2018-09-30 23:53:02,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:53:02,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-30 23:53:02,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-30 23:53:02,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-30 23:53:02,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2018-09-30 23:53:02,037 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 161 [2018-09-30 23:53:02,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:02,037 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2018-09-30 23:53:02,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 23:53:02,037 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2018-09-30 23:53:02,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-30 23:53:02,038 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:02,038 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 1, 1] [2018-09-30 23:53:02,038 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:02,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:02,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387257, now seen corresponding path program 34 times [2018-09-30 23:53:02,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:02,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:02,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:02,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:02,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:03,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:03,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:03,522 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:53:03,569 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:53:03,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:03,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:03,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:03,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 23:53:03,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 23:53:03,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 23:53:03,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:53:03,617 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 56 states. [2018-09-30 23:53:03,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:03,770 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2018-09-30 23:53:03,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:53:03,771 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 161 [2018-09-30 23:53:03,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:03,772 INFO L225 Difference]: With dead ends: 170 [2018-09-30 23:53:03,772 INFO L226 Difference]: Without dead ends: 166 [2018-09-30 23:53:03,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:53:03,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-30 23:53:03,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-09-30 23:53:03,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-09-30 23:53:03,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2018-09-30 23:53:03,777 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 161 [2018-09-30 23:53:03,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:03,777 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2018-09-30 23:53:03,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 23:53:03,778 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2018-09-30 23:53:03,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 23:53:03,778 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:03,779 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1] [2018-09-30 23:53:03,779 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:03,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:03,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694699, now seen corresponding path program 53 times [2018-09-30 23:53:03,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:03,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:03,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:03,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:03,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:04,864 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:04,864 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:04,871 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:53:04,977 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-30 23:53:04,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:04,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:05,030 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:05,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 23:53:05,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 23:53:05,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 23:53:05,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:53:05,031 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 56 states. [2018-09-30 23:53:05,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:05,134 INFO L93 Difference]: Finished difference Result 171 states and 176 transitions. [2018-09-30 23:53:05,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:53:05,135 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 164 [2018-09-30 23:53:05,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:05,136 INFO L225 Difference]: With dead ends: 171 [2018-09-30 23:53:05,136 INFO L226 Difference]: Without dead ends: 167 [2018-09-30 23:53:05,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:53:05,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-30 23:53:05,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-30 23:53:05,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 23:53:05,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2018-09-30 23:53:05,141 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 164 [2018-09-30 23:53:05,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:05,142 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2018-09-30 23:53:05,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 23:53:05,142 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2018-09-30 23:53:05,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 23:53:05,143 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:05,143 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 1, 1] [2018-09-30 23:53:05,143 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:05,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:05,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694637, now seen corresponding path program 35 times [2018-09-30 23:53:05,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:05,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:05,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:05,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:05,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:06,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:06,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:06,493 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:53:06,591 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-30 23:53:06,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:06,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:06,641 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:06,641 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 23:53:06,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 23:53:06,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 23:53:06,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:53:06,642 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 57 states. [2018-09-30 23:53:06,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:06,798 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-09-30 23:53:06,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 23:53:06,799 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 164 [2018-09-30 23:53:06,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:06,800 INFO L225 Difference]: With dead ends: 173 [2018-09-30 23:53:06,800 INFO L226 Difference]: Without dead ends: 169 [2018-09-30 23:53:06,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:53:06,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-30 23:53:06,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-30 23:53:06,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-30 23:53:06,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2018-09-30 23:53:06,804 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 164 [2018-09-30 23:53:06,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:06,804 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2018-09-30 23:53:06,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 23:53:06,804 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2018-09-30 23:53:06,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-09-30 23:53:06,805 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:06,805 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 1, 1, 1] [2018-09-30 23:53:06,806 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:06,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:06,806 INFO L82 PathProgramCache]: Analyzing trace with hash -249780471, now seen corresponding path program 54 times [2018-09-30 23:53:06,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:06,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:06,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:06,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:06,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 55 proven. 4455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:08,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:08,033 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:08,041 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:53:08,161 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-09-30 23:53:08,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:08,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 0 proven. 4510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:10,751 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:10,751 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-30 23:53:10,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 23:53:10,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 23:53:10,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3248, Invalid=9408, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 23:53:10,753 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 113 states. [2018-09-30 23:53:16,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:16,823 INFO L93 Difference]: Finished difference Result 176 states and 183 transitions. [2018-09-30 23:53:16,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 23:53:16,824 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 167 [2018-09-30 23:53:16,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:16,825 INFO L225 Difference]: With dead ends: 176 [2018-09-30 23:53:16,825 INFO L226 Difference]: Without dead ends: 172 [2018-09-30 23:53:16,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9019 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=15678, Invalid=33828, Unknown=0, NotChecked=0, Total=49506 [2018-09-30 23:53:16,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-09-30 23:53:16,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-09-30 23:53:16,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-09-30 23:53:16,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2018-09-30 23:53:16,832 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 167 [2018-09-30 23:53:16,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:16,833 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2018-09-30 23:53:16,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 23:53:16,833 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2018-09-30 23:53:16,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 23:53:16,834 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:16,834 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 1, 1, 1] [2018-09-30 23:53:16,834 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:16,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:16,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751445, now seen corresponding path program 55 times [2018-09-30 23:53:16,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:16,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:16,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:16,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:16,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:16,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:18,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:18,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:18,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:18,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:18,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:18,164 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 23:53:18,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 23:53:18,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 23:53:18,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:53:18,165 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand 58 states. [2018-09-30 23:53:18,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:18,506 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2018-09-30 23:53:18,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 23:53:18,506 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 170 [2018-09-30 23:53:18,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:18,507 INFO L225 Difference]: With dead ends: 177 [2018-09-30 23:53:18,507 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 23:53:18,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:53:18,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 23:53:18,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-30 23:53:18,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-30 23:53:18,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2018-09-30 23:53:18,510 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 170 [2018-09-30 23:53:18,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:18,510 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2018-09-30 23:53:18,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 23:53:18,511 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2018-09-30 23:53:18,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 23:53:18,511 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:18,511 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 1, 1] [2018-09-30 23:53:18,511 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:18,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:18,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751507, now seen corresponding path program 36 times [2018-09-30 23:53:18,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:18,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:18,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:18,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:18,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:20,331 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:20,331 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:20,339 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:53:20,448 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2018-09-30 23:53:20,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:20,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:20,500 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:20,500 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 23:53:20,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 23:53:20,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 23:53:20,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:53:20,501 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 59 states. [2018-09-30 23:53:20,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:20,670 INFO L93 Difference]: Finished difference Result 179 states and 185 transitions. [2018-09-30 23:53:20,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:53:20,671 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 170 [2018-09-30 23:53:20,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:20,672 INFO L225 Difference]: With dead ends: 179 [2018-09-30 23:53:20,672 INFO L226 Difference]: Without dead ends: 175 [2018-09-30 23:53:20,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:53:20,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-30 23:53:20,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-30 23:53:20,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-30 23:53:20,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-09-30 23:53:20,676 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2018-09-30 23:53:20,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:20,676 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-09-30 23:53:20,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 23:53:20,676 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-09-30 23:53:20,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-30 23:53:20,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:20,677 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 56, 1, 1, 1] [2018-09-30 23:53:20,677 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:20,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:20,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428215, now seen corresponding path program 56 times [2018-09-30 23:53:20,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:20,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:20,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:20,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:20,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:21,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:21,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:21,875 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:53:21,925 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:53:21,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:21,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:21,985 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:21,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 23:53:21,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 23:53:21,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 23:53:21,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:53:21,986 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 59 states. [2018-09-30 23:53:22,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:22,160 INFO L93 Difference]: Finished difference Result 180 states and 185 transitions. [2018-09-30 23:53:22,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:53:22,160 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 173 [2018-09-30 23:53:22,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:22,161 INFO L225 Difference]: With dead ends: 180 [2018-09-30 23:53:22,161 INFO L226 Difference]: Without dead ends: 176 [2018-09-30 23:53:22,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:53:22,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-09-30 23:53:22,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-09-30 23:53:22,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-09-30 23:53:22,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2018-09-30 23:53:22,165 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 173 [2018-09-30 23:53:22,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:22,166 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2018-09-30 23:53:22,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 23:53:22,166 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2018-09-30 23:53:22,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-30 23:53:22,167 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:22,167 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 1, 1] [2018-09-30 23:53:22,167 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:22,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:22,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428153, now seen corresponding path program 37 times [2018-09-30 23:53:22,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:22,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:22,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:22,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:22,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:23,457 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:23,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:23,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:23,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:23,567 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:23,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 23:53:23,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 23:53:23,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 23:53:23,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:53:23,569 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 60 states. [2018-09-30 23:53:23,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:23,711 INFO L93 Difference]: Finished difference Result 182 states and 188 transitions. [2018-09-30 23:53:23,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 23:53:23,711 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 173 [2018-09-30 23:53:23,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:23,712 INFO L225 Difference]: With dead ends: 182 [2018-09-30 23:53:23,712 INFO L226 Difference]: Without dead ends: 178 [2018-09-30 23:53:23,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:53:23,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-09-30 23:53:23,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-09-30 23:53:23,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-09-30 23:53:23,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2018-09-30 23:53:23,717 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 173 [2018-09-30 23:53:23,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:23,717 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2018-09-30 23:53:23,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 23:53:23,717 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2018-09-30 23:53:23,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-30 23:53:23,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:23,718 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 1, 1, 1] [2018-09-30 23:53:23,718 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:23,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:23,719 INFO L82 PathProgramCache]: Analyzing trace with hash 200069397, now seen corresponding path program 57 times [2018-09-30 23:53:23,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:23,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:23,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:23,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:23,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 58 proven. 4959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:25,062 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:25,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:25,072 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:53:25,184 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2018-09-30 23:53:25,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:25,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:27,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:27,716 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:27,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-09-30 23:53:27,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-30 23:53:27,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-30 23:53:27,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3599, Invalid=10443, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:53:27,718 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 119 states. [2018-09-30 23:53:34,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:34,533 INFO L93 Difference]: Finished difference Result 185 states and 192 transitions. [2018-09-30 23:53:34,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 23:53:34,533 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 176 [2018-09-30 23:53:34,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:34,534 INFO L225 Difference]: With dead ends: 185 [2018-09-30 23:53:34,535 INFO L226 Difference]: Without dead ends: 181 [2018-09-30 23:53:34,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10033 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=17403, Invalid=37587, Unknown=0, NotChecked=0, Total=54990 [2018-09-30 23:53:34,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-30 23:53:34,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-30 23:53:34,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 23:53:34,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-09-30 23:53:34,542 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 176 [2018-09-30 23:53:34,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:34,542 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-09-30 23:53:34,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-30 23:53:34,542 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-09-30 23:53:34,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-09-30 23:53:34,543 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:34,543 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 58, 1, 1, 1] [2018-09-30 23:53:34,543 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:34,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:34,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761783, now seen corresponding path program 58 times [2018-09-30 23:53:34,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:34,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:34,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:34,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:34,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:36,069 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:36,069 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:36,079 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:53:36,132 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:53:36,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:36,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:36,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:36,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 23:53:36,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 23:53:36,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 23:53:36,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:53:36,185 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 61 states. [2018-09-30 23:53:36,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:36,295 INFO L93 Difference]: Finished difference Result 186 states and 191 transitions. [2018-09-30 23:53:36,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 23:53:36,296 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 179 [2018-09-30 23:53:36,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:36,297 INFO L225 Difference]: With dead ends: 186 [2018-09-30 23:53:36,297 INFO L226 Difference]: Without dead ends: 182 [2018-09-30 23:53:36,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:53:36,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-09-30 23:53:36,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-09-30 23:53:36,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-09-30 23:53:36,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2018-09-30 23:53:36,302 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 179 [2018-09-30 23:53:36,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:36,302 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2018-09-30 23:53:36,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 23:53:36,302 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2018-09-30 23:53:36,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-09-30 23:53:36,303 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:36,303 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 1, 1] [2018-09-30 23:53:36,303 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:36,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:36,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761721, now seen corresponding path program 38 times [2018-09-30 23:53:36,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:36,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:36,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:36,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:36,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:37,630 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:37,630 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:37,638 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:53:37,690 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:53:37,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:37,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:37,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:37,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 23:53:37,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 23:53:37,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 23:53:37,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:53:37,743 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 62 states. [2018-09-30 23:53:37,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:37,940 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2018-09-30 23:53:37,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 23:53:37,940 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 179 [2018-09-30 23:53:37,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:37,941 INFO L225 Difference]: With dead ends: 188 [2018-09-30 23:53:37,941 INFO L226 Difference]: Without dead ends: 184 [2018-09-30 23:53:37,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:53:37,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-09-30 23:53:37,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-09-30 23:53:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-09-30 23:53:37,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2018-09-30 23:53:37,944 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 179 [2018-09-30 23:53:37,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:37,945 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2018-09-30 23:53:37,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 23:53:37,945 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2018-09-30 23:53:37,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-30 23:53:37,945 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:37,946 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 1, 1, 1] [2018-09-30 23:53:37,946 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:37,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:37,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1282737003, now seen corresponding path program 59 times [2018-09-30 23:53:37,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:37,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:37,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:37,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:37,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:39,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:39,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:39,616 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:53:39,734 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-30 23:53:39,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:39,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:39,788 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:39,788 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 23:53:39,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 23:53:39,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 23:53:39,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:53:39,789 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand 62 states. [2018-09-30 23:53:39,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:39,907 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2018-09-30 23:53:39,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 23:53:39,907 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 182 [2018-09-30 23:53:39,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:39,908 INFO L225 Difference]: With dead ends: 189 [2018-09-30 23:53:39,909 INFO L226 Difference]: Without dead ends: 185 [2018-09-30 23:53:39,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:53:39,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-30 23:53:39,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-30 23:53:39,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-30 23:53:39,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-09-30 23:53:39,913 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 182 [2018-09-30 23:53:39,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:39,913 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-09-30 23:53:39,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 23:53:39,913 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-09-30 23:53:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-30 23:53:39,914 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:39,914 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 1, 1] [2018-09-30 23:53:39,914 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:39,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:39,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1282736941, now seen corresponding path program 39 times [2018-09-30 23:53:39,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:39,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:39,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:39,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:39,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:41,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:41,297 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:41,297 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:41,312 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:53:41,433 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) [2018-09-30 23:53:41,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:41,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:41,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:41,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 23:53:41,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 23:53:41,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 23:53:41,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:53:41,490 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 63 states. [2018-09-30 23:53:41,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:41,669 INFO L93 Difference]: Finished difference Result 191 states and 197 transitions. [2018-09-30 23:53:41,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 23:53:41,670 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 182 [2018-09-30 23:53:41,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:41,671 INFO L225 Difference]: With dead ends: 191 [2018-09-30 23:53:41,671 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 23:53:41,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:53:41,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 23:53:41,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-30 23:53:41,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-30 23:53:41,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2018-09-30 23:53:41,675 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 182 [2018-09-30 23:53:41,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:41,675 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2018-09-30 23:53:41,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 23:53:41,675 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2018-09-30 23:53:41,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-09-30 23:53:41,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:41,676 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 60, 1, 1, 1] [2018-09-30 23:53:41,676 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:41,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:41,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1692584823, now seen corresponding path program 60 times [2018-09-30 23:53:41,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:41,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:41,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:41,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:41,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:41,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 61 proven. 5490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:43,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:43,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:43,207 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:53:43,323 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-09-30 23:53:43,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:43,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:46,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 0 proven. 5551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:46,425 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:46,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-09-30 23:53:46,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-30 23:53:46,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-30 23:53:46,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3968, Invalid=11532, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 23:53:46,427 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand 125 states. [2018-09-30 23:53:53,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:53,565 INFO L93 Difference]: Finished difference Result 194 states and 201 transitions. [2018-09-30 23:53:53,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-30 23:53:53,565 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 185 [2018-09-30 23:53:53,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:53,566 INFO L225 Difference]: With dead ends: 194 [2018-09-30 23:53:53,566 INFO L226 Difference]: Without dead ends: 190 [2018-09-30 23:53:53,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11101 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=19218, Invalid=41544, Unknown=0, NotChecked=0, Total=60762 [2018-09-30 23:53:53,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-09-30 23:53:53,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-09-30 23:53:53,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-09-30 23:53:53,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2018-09-30 23:53:53,572 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 185 [2018-09-30 23:53:53,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:53,572 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2018-09-30 23:53:53,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-30 23:53:53,572 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2018-09-30 23:53:53,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 23:53:53,573 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:53,573 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 1, 1, 1] [2018-09-30 23:53:53,573 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:53,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:53,573 INFO L82 PathProgramCache]: Analyzing trace with hash -876967915, now seen corresponding path program 61 times [2018-09-30 23:53:53,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:53,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:53,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:53,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:53,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:55,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:55,451 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:55,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:55,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:55,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:55,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:55,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 23:53:55,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 23:53:55,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 23:53:55,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:53:55,571 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 64 states. [2018-09-30 23:53:55,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:55,783 INFO L93 Difference]: Finished difference Result 195 states and 200 transitions. [2018-09-30 23:53:55,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 23:53:55,784 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 188 [2018-09-30 23:53:55,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:55,785 INFO L225 Difference]: With dead ends: 195 [2018-09-30 23:53:55,785 INFO L226 Difference]: Without dead ends: 191 [2018-09-30 23:53:55,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:53:55,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-30 23:53:55,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-30 23:53:55,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-30 23:53:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-09-30 23:53:55,791 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 188 [2018-09-30 23:53:55,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:55,791 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-09-30 23:53:55,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 23:53:55,791 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-09-30 23:53:55,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 23:53:55,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:55,792 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 1, 1] [2018-09-30 23:53:55,793 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:55,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:55,793 INFO L82 PathProgramCache]: Analyzing trace with hash -876967853, now seen corresponding path program 40 times [2018-09-30 23:53:55,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:55,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:55,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:55,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:55,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:57,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:57,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:57,337 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:53:57,394 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:53:57,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:57,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:57,454 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:57,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 23:53:57,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 23:53:57,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 23:53:57,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:53:57,456 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 65 states. [2018-09-30 23:53:57,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:57,670 INFO L93 Difference]: Finished difference Result 197 states and 203 transitions. [2018-09-30 23:53:57,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:53:57,670 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 188 [2018-09-30 23:53:57,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:57,672 INFO L225 Difference]: With dead ends: 197 [2018-09-30 23:53:57,672 INFO L226 Difference]: Without dead ends: 193 [2018-09-30 23:53:57,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:53:57,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-30 23:53:57,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-30 23:53:57,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-30 23:53:57,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2018-09-30 23:53:57,678 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 188 [2018-09-30 23:53:57,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:57,678 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2018-09-30 23:53:57,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 23:53:57,679 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2018-09-30 23:53:57,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-09-30 23:53:57,680 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:57,680 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 62, 1, 1, 1] [2018-09-30 23:53:57,680 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:57,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:57,680 INFO L82 PathProgramCache]: Analyzing trace with hash 536344841, now seen corresponding path program 62 times [2018-09-30 23:53:57,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:57,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:57,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:57,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:57,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:59,342 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:59,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:59,349 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:53:59,407 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:53:59,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:59,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:59,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:59,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:59,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 23:53:59,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 23:53:59,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 23:53:59,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:53:59,465 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand 65 states. [2018-09-30 23:53:59,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:59,691 INFO L93 Difference]: Finished difference Result 198 states and 203 transitions. [2018-09-30 23:53:59,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:53:59,691 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 191 [2018-09-30 23:53:59,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:59,691 INFO L225 Difference]: With dead ends: 198 [2018-09-30 23:53:59,692 INFO L226 Difference]: Without dead ends: 194 [2018-09-30 23:53:59,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:53:59,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-09-30 23:53:59,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-09-30 23:53:59,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-09-30 23:53:59,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2018-09-30 23:53:59,696 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 191 [2018-09-30 23:53:59,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:59,696 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2018-09-30 23:53:59,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 23:53:59,696 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2018-09-30 23:53:59,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-09-30 23:53:59,697 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:59,697 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 1, 1] [2018-09-30 23:53:59,697 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:59,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:59,698 INFO L82 PathProgramCache]: Analyzing trace with hash 536344903, now seen corresponding path program 41 times [2018-09-30 23:53:59,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:59,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:59,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:59,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:59,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:01,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:01,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:01,347 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:01,354 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:54:01,476 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-09-30 23:54:01,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:01,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:01,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:01,551 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 23:54:01,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 23:54:01,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 23:54:01,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:54:01,552 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand 66 states. [2018-09-30 23:54:01,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:01,749 INFO L93 Difference]: Finished difference Result 200 states and 206 transitions. [2018-09-30 23:54:01,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 23:54:01,750 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 191 [2018-09-30 23:54:01,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:01,751 INFO L225 Difference]: With dead ends: 200 [2018-09-30 23:54:01,751 INFO L226 Difference]: Without dead ends: 196 [2018-09-30 23:54:01,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:54:01,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-09-30 23:54:01,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-09-30 23:54:01,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-09-30 23:54:01,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2018-09-30 23:54:01,757 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 191 [2018-09-30 23:54:01,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:01,757 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2018-09-30 23:54:01,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 23:54:01,757 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2018-09-30 23:54:01,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-30 23:54:01,758 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:01,758 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 1, 1, 1] [2018-09-30 23:54:01,758 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:01,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:01,758 INFO L82 PathProgramCache]: Analyzing trace with hash 972256149, now seen corresponding path program 63 times [2018-09-30 23:54:01,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:01,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:01,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:01,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:01,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:03,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 64 proven. 6048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:03,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:03,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:03,322 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:54:03,454 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2018-09-30 23:54:03,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:03,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:06,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:06,782 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-09-30 23:54:06,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-30 23:54:06,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-30 23:54:06,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4355, Invalid=12675, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 23:54:06,784 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 131 states. [2018-09-30 23:54:14,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:14,632 INFO L93 Difference]: Finished difference Result 203 states and 210 transitions. [2018-09-30 23:54:14,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-30 23:54:14,633 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 194 [2018-09-30 23:54:14,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:14,634 INFO L225 Difference]: With dead ends: 203 [2018-09-30 23:54:14,634 INFO L226 Difference]: Without dead ends: 199 [2018-09-30 23:54:14,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12223 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=21123, Invalid=45699, Unknown=0, NotChecked=0, Total=66822 [2018-09-30 23:54:14,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-30 23:54:14,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-30 23:54:14,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-30 23:54:14,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2018-09-30 23:54:14,640 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 194 [2018-09-30 23:54:14,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:14,640 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2018-09-30 23:54:14,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-30 23:54:14,640 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2018-09-30 23:54:14,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-30 23:54:14,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:14,641 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 64, 1, 1, 1] [2018-09-30 23:54:14,641 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:14,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:14,642 INFO L82 PathProgramCache]: Analyzing trace with hash -775070327, now seen corresponding path program 64 times [2018-09-30 23:54:14,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:14,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:14,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:14,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:14,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:16,437 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:16,437 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:16,444 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:54:16,500 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:54:16,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:16,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:16,557 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:16,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 23:54:16,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 23:54:16,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 23:54:16,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:54:16,558 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 67 states. [2018-09-30 23:54:16,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:16,670 INFO L93 Difference]: Finished difference Result 204 states and 209 transitions. [2018-09-30 23:54:16,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 23:54:16,671 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 197 [2018-09-30 23:54:16,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:16,671 INFO L225 Difference]: With dead ends: 204 [2018-09-30 23:54:16,672 INFO L226 Difference]: Without dead ends: 200 [2018-09-30 23:54:16,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:54:16,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-09-30 23:54:16,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-09-30 23:54:16,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-09-30 23:54:16,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2018-09-30 23:54:16,677 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 197 [2018-09-30 23:54:16,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:16,677 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2018-09-30 23:54:16,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 23:54:16,677 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2018-09-30 23:54:16,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-30 23:54:16,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:16,678 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 1, 1] [2018-09-30 23:54:16,679 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:16,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:16,679 INFO L82 PathProgramCache]: Analyzing trace with hash -775070265, now seen corresponding path program 42 times [2018-09-30 23:54:16,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:16,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:16,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:16,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:16,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:18,324 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:18,325 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:18,333 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:54:18,456 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 66 check-sat command(s) [2018-09-30 23:54:18,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:18,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:18,515 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:18,516 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 23:54:18,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 23:54:18,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 23:54:18,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:54:18,517 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 68 states. [2018-09-30 23:54:18,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:18,733 INFO L93 Difference]: Finished difference Result 206 states and 212 transitions. [2018-09-30 23:54:18,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 23:54:18,733 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 197 [2018-09-30 23:54:18,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:18,734 INFO L225 Difference]: With dead ends: 206 [2018-09-30 23:54:18,734 INFO L226 Difference]: Without dead ends: 202 [2018-09-30 23:54:18,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:54:18,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-09-30 23:54:18,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-09-30 23:54:18,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-09-30 23:54:18,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 204 transitions. [2018-09-30 23:54:18,739 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 204 transitions. Word has length 197 [2018-09-30 23:54:18,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:18,739 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 204 transitions. [2018-09-30 23:54:18,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 23:54:18,739 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 204 transitions. [2018-09-30 23:54:18,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-30 23:54:18,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:18,740 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 65, 1, 1, 1] [2018-09-30 23:54:18,740 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:18,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:18,740 INFO L82 PathProgramCache]: Analyzing trace with hash -374489323, now seen corresponding path program 65 times [2018-09-30 23:54:18,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:18,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:18,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:18,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:18,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:20,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:20,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:20,777 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:54:20,907 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-30 23:54:20,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:20,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:20,988 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:20,988 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 23:54:20,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 23:54:20,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 23:54:20,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:54:20,989 INFO L87 Difference]: Start difference. First operand 202 states and 204 transitions. Second operand 68 states. [2018-09-30 23:54:21,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:21,192 INFO L93 Difference]: Finished difference Result 207 states and 212 transitions. [2018-09-30 23:54:21,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 23:54:21,192 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 200 [2018-09-30 23:54:21,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:21,193 INFO L225 Difference]: With dead ends: 207 [2018-09-30 23:54:21,193 INFO L226 Difference]: Without dead ends: 203 [2018-09-30 23:54:21,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:54:21,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-30 23:54:21,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-30 23:54:21,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-30 23:54:21,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2018-09-30 23:54:21,198 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 200 [2018-09-30 23:54:21,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:21,199 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2018-09-30 23:54:21,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 23:54:21,199 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2018-09-30 23:54:21,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-30 23:54:21,200 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:21,200 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 1, 1] [2018-09-30 23:54:21,200 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:21,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:21,200 INFO L82 PathProgramCache]: Analyzing trace with hash -374489261, now seen corresponding path program 43 times [2018-09-30 23:54:21,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:21,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:21,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:21,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:21,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:22,908 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:22,908 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:22,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:54:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:22,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:23,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:23,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 23:54:23,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 23:54:23,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 23:54:23,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:54:23,039 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 69 states. [2018-09-30 23:54:23,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:23,214 INFO L93 Difference]: Finished difference Result 209 states and 215 transitions. [2018-09-30 23:54:23,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 23:54:23,215 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 200 [2018-09-30 23:54:23,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:23,215 INFO L225 Difference]: With dead ends: 209 [2018-09-30 23:54:23,216 INFO L226 Difference]: Without dead ends: 205 [2018-09-30 23:54:23,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:54:23,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-30 23:54:23,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-30 23:54:23,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-30 23:54:23,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-09-30 23:54:23,221 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 200 [2018-09-30 23:54:23,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:23,221 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-09-30 23:54:23,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 23:54:23,221 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-09-30 23:54:23,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-30 23:54:23,222 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:23,222 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 66, 1, 1, 1] [2018-09-30 23:54:23,222 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:23,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:23,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1915052553, now seen corresponding path program 66 times [2018-09-30 23:54:23,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:23,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:23,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:23,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:54:23,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 67 proven. 6633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:24,906 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:24,906 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:24,912 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:54:25,062 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-09-30 23:54:25,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:25,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:28,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 0 proven. 6700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:28,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:28,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-09-30 23:54:28,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-30 23:54:28,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-30 23:54:28,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4760, Invalid=13872, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 23:54:28,568 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 137 states. [2018-09-30 23:54:37,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:37,309 INFO L93 Difference]: Finished difference Result 212 states and 219 transitions. [2018-09-30 23:54:37,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-30 23:54:37,310 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 203 [2018-09-30 23:54:37,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:37,310 INFO L225 Difference]: With dead ends: 212 [2018-09-30 23:54:37,311 INFO L226 Difference]: Without dead ends: 208 [2018-09-30 23:54:37,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13399 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=23118, Invalid=50052, Unknown=0, NotChecked=0, Total=73170 [2018-09-30 23:54:37,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-09-30 23:54:37,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-09-30 23:54:37,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-09-30 23:54:37,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2018-09-30 23:54:37,316 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 203 [2018-09-30 23:54:37,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:37,317 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2018-09-30 23:54:37,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-30 23:54:37,317 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2018-09-30 23:54:37,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-30 23:54:37,318 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:37,318 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 1, 1, 1] [2018-09-30 23:54:37,318 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:37,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:37,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452693, now seen corresponding path program 67 times [2018-09-30 23:54:37,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:37,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:37,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:37,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:37,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:39,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:39,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:39,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:54:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:39,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:39,172 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:39,172 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 23:54:39,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 23:54:39,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 23:54:39,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:54:39,174 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand 70 states. [2018-09-30 23:54:39,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:39,300 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2018-09-30 23:54:39,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 23:54:39,300 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 206 [2018-09-30 23:54:39,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:39,301 INFO L225 Difference]: With dead ends: 213 [2018-09-30 23:54:39,301 INFO L226 Difference]: Without dead ends: 209 [2018-09-30 23:54:39,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:54:39,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-30 23:54:39,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-30 23:54:39,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-30 23:54:39,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2018-09-30 23:54:39,305 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 206 [2018-09-30 23:54:39,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:39,306 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2018-09-30 23:54:39,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 23:54:39,306 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2018-09-30 23:54:39,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-30 23:54:39,306 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:39,306 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 1, 1] [2018-09-30 23:54:39,307 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:39,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:39,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452755, now seen corresponding path program 44 times [2018-09-30 23:54:39,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:39,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:39,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:39,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:54:39,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:41,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:41,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:41,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:41,344 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:54:41,405 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:54:41,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:41,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:41,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:41,466 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 23:54:41,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 23:54:41,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 23:54:41,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:54:41,467 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 71 states. [2018-09-30 23:54:41,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:41,674 INFO L93 Difference]: Finished difference Result 215 states and 221 transitions. [2018-09-30 23:54:41,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 23:54:41,675 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 206 [2018-09-30 23:54:41,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:41,675 INFO L225 Difference]: With dead ends: 215 [2018-09-30 23:54:41,675 INFO L226 Difference]: Without dead ends: 211 [2018-09-30 23:54:41,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:54:41,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-30 23:54:41,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-30 23:54:41,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-30 23:54:41,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-09-30 23:54:41,679 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 206 [2018-09-30 23:54:41,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:41,680 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-09-30 23:54:41,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 23:54:41,680 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-09-30 23:54:41,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-09-30 23:54:41,680 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:41,680 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 68, 1, 1, 1] [2018-09-30 23:54:41,681 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:41,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:41,681 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289353, now seen corresponding path program 68 times [2018-09-30 23:54:41,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:41,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:41,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:41,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:41,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:41,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:43,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:43,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:43,515 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:54:43,595 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:54:43,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:43,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:43,684 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:43,684 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 23:54:43,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 23:54:43,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 23:54:43,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:54:43,686 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 71 states. [2018-09-30 23:54:43,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:43,911 INFO L93 Difference]: Finished difference Result 216 states and 221 transitions. [2018-09-30 23:54:43,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 23:54:43,911 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 209 [2018-09-30 23:54:43,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:43,912 INFO L225 Difference]: With dead ends: 216 [2018-09-30 23:54:43,912 INFO L226 Difference]: Without dead ends: 212 [2018-09-30 23:54:43,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:54:43,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-09-30 23:54:43,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2018-09-30 23:54:43,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-09-30 23:54:43,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2018-09-30 23:54:43,917 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 209 [2018-09-30 23:54:43,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:43,917 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2018-09-30 23:54:43,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 23:54:43,917 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2018-09-30 23:54:43,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-09-30 23:54:43,918 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:43,918 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 1, 1] [2018-09-30 23:54:43,918 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:43,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:43,918 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289415, now seen corresponding path program 45 times [2018-09-30 23:54:43,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:43,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:43,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:43,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:43,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:46,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:46,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:46,183 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:54:46,326 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-30 23:54:46,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:46,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:46,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:46,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:46,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 23:54:46,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 23:54:46,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 23:54:46,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:54:46,390 INFO L87 Difference]: Start difference. First operand 212 states and 214 transitions. Second operand 72 states. [2018-09-30 23:54:46,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:46,657 INFO L93 Difference]: Finished difference Result 218 states and 224 transitions. [2018-09-30 23:54:46,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 23:54:46,657 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 209 [2018-09-30 23:54:46,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:46,658 INFO L225 Difference]: With dead ends: 218 [2018-09-30 23:54:46,658 INFO L226 Difference]: Without dead ends: 214 [2018-09-30 23:54:46,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:54:46,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-09-30 23:54:46,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2018-09-30 23:54:46,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-09-30 23:54:46,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2018-09-30 23:54:46,662 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 209 [2018-09-30 23:54:46,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:46,662 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2018-09-30 23:54:46,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 23:54:46,662 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2018-09-30 23:54:46,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-30 23:54:46,663 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:46,663 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 1, 1, 1] [2018-09-30 23:54:46,663 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:46,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:46,663 INFO L82 PathProgramCache]: Analyzing trace with hash -645499371, now seen corresponding path program 69 times [2018-09-30 23:54:46,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:46,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:46,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:46,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:46,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:46,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 70 proven. 7245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:48,466 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:48,466 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:48,475 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:54:48,617 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2018-09-30 23:54:48,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:48,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:52,573 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:52,573 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-09-30 23:54:52,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-09-30 23:54:52,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-09-30 23:54:52,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5183, Invalid=15123, Unknown=0, NotChecked=0, Total=20306 [2018-09-30 23:54:52,576 INFO L87 Difference]: Start difference. First operand 214 states and 216 transitions. Second operand 143 states. [2018-09-30 23:55:02,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:02,338 INFO L93 Difference]: Finished difference Result 221 states and 228 transitions. [2018-09-30 23:55:02,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-09-30 23:55:02,339 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 212 [2018-09-30 23:55:02,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:02,340 INFO L225 Difference]: With dead ends: 221 [2018-09-30 23:55:02,340 INFO L226 Difference]: Without dead ends: 217 [2018-09-30 23:55:02,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14629 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=25203, Invalid=54603, Unknown=0, NotChecked=0, Total=79806 [2018-09-30 23:55:02,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-09-30 23:55:02,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-09-30 23:55:02,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-30 23:55:02,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2018-09-30 23:55:02,346 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 212 [2018-09-30 23:55:02,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:02,346 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2018-09-30 23:55:02,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-09-30 23:55:02,346 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2018-09-30 23:55:02,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-09-30 23:55:02,347 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:02,347 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 70, 1, 1, 1] [2018-09-30 23:55:02,347 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:02,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:02,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1501738231, now seen corresponding path program 70 times [2018-09-30 23:55:02,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:02,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:02,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:02,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:02,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 71 proven. 7455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:04,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:04,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:04,208 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:55:04,271 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:55:04,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:04,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 71 proven. 7455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:04,336 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:04,336 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 23:55:04,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 23:55:04,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 23:55:04,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:55:04,337 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 73 states. [2018-09-30 23:55:04,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:04,484 INFO L93 Difference]: Finished difference Result 222 states and 227 transitions. [2018-09-30 23:55:04,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 23:55:04,485 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 215 [2018-09-30 23:55:04,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:04,486 INFO L225 Difference]: With dead ends: 222 [2018-09-30 23:55:04,486 INFO L226 Difference]: Without dead ends: 218 [2018-09-30 23:55:04,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:55:04,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-09-30 23:55:04,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2018-09-30 23:55:04,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-09-30 23:55:04,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 220 transitions. [2018-09-30 23:55:04,490 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 220 transitions. Word has length 215 [2018-09-30 23:55:04,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:04,490 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 220 transitions. [2018-09-30 23:55:04,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 23:55:04,490 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 220 transitions. [2018-09-30 23:55:04,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-09-30 23:55:04,491 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:04,491 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 71, 1, 1] [2018-09-30 23:55:04,491 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:04,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:04,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1501738169, now seen corresponding path program 46 times [2018-09-30 23:55:04,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:04,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:04,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:04,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:04,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 0 proven. 7526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:06,671 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:06,671 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:06,679 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:55:06,745 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:55:06,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:06,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 0 proven. 7526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:06,810 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:06,810 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 23:55:06,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 23:55:06,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 23:55:06,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:55:06,811 INFO L87 Difference]: Start difference. First operand 218 states and 220 transitions. Second operand 74 states. [2018-09-30 23:55:07,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:07,065 INFO L93 Difference]: Finished difference Result 224 states and 230 transitions. [2018-09-30 23:55:07,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 23:55:07,065 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 215 [2018-09-30 23:55:07,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:07,066 INFO L225 Difference]: With dead ends: 224 [2018-09-30 23:55:07,066 INFO L226 Difference]: Without dead ends: 220 [2018-09-30 23:55:07,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:55:07,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-09-30 23:55:07,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2018-09-30 23:55:07,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-09-30 23:55:07,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2018-09-30 23:55:07,070 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 215 [2018-09-30 23:55:07,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:07,070 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2018-09-30 23:55:07,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 23:55:07,070 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2018-09-30 23:55:07,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-30 23:55:07,071 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:07,071 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 71, 1, 1, 1] [2018-09-30 23:55:07,071 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:07,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:07,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1902845547, now seen corresponding path program 71 times [2018-09-30 23:55:07,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:07,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:07,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:07,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:07,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:08,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 72 proven. 7668 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:08,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:08,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:08,997 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:55:09,150 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-09-30 23:55:09,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:09,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:09,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 72 proven. 7668 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:09,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:09,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 23:55:09,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 23:55:09,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 23:55:09,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:55:09,216 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand 74 states. [2018-09-30 23:55:09,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:09,486 INFO L93 Difference]: Finished difference Result 225 states and 230 transitions. [2018-09-30 23:55:09,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 23:55:09,487 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 218 [2018-09-30 23:55:09,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:09,488 INFO L225 Difference]: With dead ends: 225 [2018-09-30 23:55:09,488 INFO L226 Difference]: Without dead ends: 221 [2018-09-30 23:55:09,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:55:09,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-30 23:55:09,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-30 23:55:09,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-30 23:55:09,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2018-09-30 23:55:09,492 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 218 [2018-09-30 23:55:09,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:09,492 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2018-09-30 23:55:09,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 23:55:09,492 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2018-09-30 23:55:09,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-30 23:55:09,493 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:09,493 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 72, 1, 1] [2018-09-30 23:55:09,493 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:09,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:09,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1902845485, now seen corresponding path program 47 times [2018-09-30 23:55:09,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:09,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:09,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:09,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:09,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 0 proven. 7740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:11,789 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:11,789 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:11,796 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:55:11,984 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-09-30 23:55:11,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:11,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 0 proven. 7740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:12,050 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:12,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 23:55:12,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 23:55:12,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 23:55:12,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:55:12,052 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand 75 states. [2018-09-30 23:55:12,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:12,302 INFO L93 Difference]: Finished difference Result 227 states and 233 transitions. [2018-09-30 23:55:12,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 23:55:12,302 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 218 [2018-09-30 23:55:12,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:12,303 INFO L225 Difference]: With dead ends: 227 [2018-09-30 23:55:12,303 INFO L226 Difference]: Without dead ends: 223 [2018-09-30 23:55:12,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:55:12,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-30 23:55:12,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-30 23:55:12,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-30 23:55:12,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2018-09-30 23:55:12,308 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 218 [2018-09-30 23:55:12,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:12,308 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2018-09-30 23:55:12,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 23:55:12,308 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2018-09-30 23:55:12,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-09-30 23:55:12,309 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:12,309 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 72, 1, 1, 1] [2018-09-30 23:55:12,309 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:12,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:12,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1603088265, now seen corresponding path program 72 times [2018-09-30 23:55:12,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:12,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:12,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:12,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:12,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 73 proven. 7884 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:14,285 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:14,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:14,292 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:55:14,436 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 74 check-sat command(s) [2018-09-30 23:55:14,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:14,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 0 proven. 7957 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:18,754 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:18,754 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-09-30 23:55:18,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-09-30 23:55:18,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-09-30 23:55:18,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5624, Invalid=16428, Unknown=0, NotChecked=0, Total=22052 [2018-09-30 23:55:18,756 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand 149 states. [2018-09-30 23:55:28,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:28,914 INFO L93 Difference]: Finished difference Result 230 states and 237 transitions. [2018-09-30 23:55:28,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-09-30 23:55:28,914 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 221 [2018-09-30 23:55:28,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:28,915 INFO L225 Difference]: With dead ends: 230 [2018-09-30 23:55:28,915 INFO L226 Difference]: Without dead ends: 226 [2018-09-30 23:55:28,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15913 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=27378, Invalid=59352, Unknown=0, NotChecked=0, Total=86730 [2018-09-30 23:55:28,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-09-30 23:55:28,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2018-09-30 23:55:28,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-09-30 23:55:28,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 228 transitions. [2018-09-30 23:55:28,922 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 228 transitions. Word has length 221 [2018-09-30 23:55:28,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:28,922 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 228 transitions. [2018-09-30 23:55:28,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-09-30 23:55:28,922 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 228 transitions. [2018-09-30 23:55:28,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-30 23:55:28,922 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:28,923 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 73, 1, 1, 1] [2018-09-30 23:55:28,923 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:28,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:28,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1862577429, now seen corresponding path program 73 times [2018-09-30 23:55:28,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:28,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:28,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:28,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:28,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 74 proven. 8103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:30,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:30,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:30,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:55:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:31,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 74 proven. 8103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:31,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:31,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 23:55:31,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 23:55:31,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 23:55:31,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:55:31,098 INFO L87 Difference]: Start difference. First operand 226 states and 228 transitions. Second operand 76 states. [2018-09-30 23:55:31,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:31,348 INFO L93 Difference]: Finished difference Result 231 states and 236 transitions. [2018-09-30 23:55:31,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 23:55:31,348 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 224 [2018-09-30 23:55:31,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:31,349 INFO L225 Difference]: With dead ends: 231 [2018-09-30 23:55:31,349 INFO L226 Difference]: Without dead ends: 227 [2018-09-30 23:55:31,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:55:31,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-30 23:55:31,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-09-30 23:55:31,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-30 23:55:31,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2018-09-30 23:55:31,353 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 224 [2018-09-30 23:55:31,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:31,353 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2018-09-30 23:55:31,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 23:55:31,353 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2018-09-30 23:55:31,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-30 23:55:31,354 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:31,354 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 74, 1, 1] [2018-09-30 23:55:31,354 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:31,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:31,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1862577491, now seen corresponding path program 48 times [2018-09-30 23:55:31,355 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:31,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:31,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:31,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:55:31,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:33,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 0 proven. 8177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:33,757 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:33,757 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:33,764 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:55:33,913 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 75 check-sat command(s) [2018-09-30 23:55:33,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:33,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 0 proven. 8177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:33,980 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:33,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 23:55:33,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 23:55:33,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 23:55:33,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:55:33,981 INFO L87 Difference]: Start difference. First operand 227 states and 229 transitions. Second operand 77 states. [2018-09-30 23:55:34,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:34,140 INFO L93 Difference]: Finished difference Result 233 states and 239 transitions. [2018-09-30 23:55:34,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 23:55:34,141 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 224 [2018-09-30 23:55:34,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:34,142 INFO L225 Difference]: With dead ends: 233 [2018-09-30 23:55:34,142 INFO L226 Difference]: Without dead ends: 229 [2018-09-30 23:55:34,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:55:34,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-09-30 23:55:34,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-09-30 23:55:34,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-30 23:55:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2018-09-30 23:55:34,148 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 224 [2018-09-30 23:55:34,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:34,148 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2018-09-30 23:55:34,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 23:55:34,148 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2018-09-30 23:55:34,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-09-30 23:55:34,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:34,149 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 74, 1, 1, 1] [2018-09-30 23:55:34,150 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:34,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:34,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1363129353, now seen corresponding path program 74 times [2018-09-30 23:55:34,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:34,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:34,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:34,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:34,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 75 proven. 8325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:36,265 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:36,265 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:36,273 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:55:36,340 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:55:36,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:36,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:36,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 75 proven. 8325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:36,410 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:36,411 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 23:55:36,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 23:55:36,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 23:55:36,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:55:36,412 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand 77 states. [2018-09-30 23:55:36,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:36,686 INFO L93 Difference]: Finished difference Result 234 states and 239 transitions. [2018-09-30 23:55:36,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 23:55:36,687 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 227 [2018-09-30 23:55:36,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:36,687 INFO L225 Difference]: With dead ends: 234 [2018-09-30 23:55:36,687 INFO L226 Difference]: Without dead ends: 230 [2018-09-30 23:55:36,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:55:36,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-09-30 23:55:36,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2018-09-30 23:55:36,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-09-30 23:55:36,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 232 transitions. [2018-09-30 23:55:36,692 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 232 transitions. Word has length 227 [2018-09-30 23:55:36,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:36,692 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 232 transitions. [2018-09-30 23:55:36,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 23:55:36,692 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 232 transitions. [2018-09-30 23:55:36,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-09-30 23:55:36,692 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:36,693 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 75, 1, 1] [2018-09-30 23:55:36,693 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:36,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:36,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1363129415, now seen corresponding path program 49 times [2018-09-30 23:55:36,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:36,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:36,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:36,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:36,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 0 proven. 8400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:39,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:39,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:39,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:55:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:39,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 0 proven. 8400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:39,159 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:39,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 23:55:39,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 23:55:39,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 23:55:39,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:55:39,160 INFO L87 Difference]: Start difference. First operand 230 states and 232 transitions. Second operand 78 states. [2018-09-30 23:55:39,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:39,460 INFO L93 Difference]: Finished difference Result 236 states and 242 transitions. [2018-09-30 23:55:39,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 23:55:39,460 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 227 [2018-09-30 23:55:39,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:39,461 INFO L225 Difference]: With dead ends: 236 [2018-09-30 23:55:39,461 INFO L226 Difference]: Without dead ends: 232 [2018-09-30 23:55:39,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:55:39,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2018-09-30 23:55:39,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2018-09-30 23:55:39,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-09-30 23:55:39,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 234 transitions. [2018-09-30 23:55:39,466 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 234 transitions. Word has length 227 [2018-09-30 23:55:39,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:39,466 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 234 transitions. [2018-09-30 23:55:39,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 23:55:39,466 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 234 transitions. [2018-09-30 23:55:39,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-30 23:55:39,467 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:39,467 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 75, 1, 1, 1] [2018-09-30 23:55:39,467 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:39,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:39,467 INFO L82 PathProgramCache]: Analyzing trace with hash 72210581, now seen corresponding path program 75 times [2018-09-30 23:55:39,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:39,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:39,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:39,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:55:39,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 76 proven. 8550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:41,614 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:41,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:41,623 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:55:41,794 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) [2018-09-30 23:55:41,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:41,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 0 proven. 8626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:46,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:46,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-09-30 23:55:46,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 155 states [2018-09-30 23:55:46,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2018-09-30 23:55:46,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6083, Invalid=17787, Unknown=0, NotChecked=0, Total=23870 [2018-09-30 23:55:46,282 INFO L87 Difference]: Start difference. First operand 232 states and 234 transitions. Second operand 155 states. [2018-09-30 23:55:57,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:57,560 INFO L93 Difference]: Finished difference Result 239 states and 246 transitions. [2018-09-30 23:55:57,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-09-30 23:55:57,561 INFO L78 Accepts]: Start accepts. Automaton has 155 states. Word has length 230 [2018-09-30 23:55:57,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:57,562 INFO L225 Difference]: With dead ends: 239 [2018-09-30 23:55:57,562 INFO L226 Difference]: Without dead ends: 235 [2018-09-30 23:55:57,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17251 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=29643, Invalid=64299, Unknown=0, NotChecked=0, Total=93942 [2018-09-30 23:55:57,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-09-30 23:55:57,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-09-30 23:55:57,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-09-30 23:55:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2018-09-30 23:55:57,569 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 230 [2018-09-30 23:55:57,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:57,569 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2018-09-30 23:55:57,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 155 states. [2018-09-30 23:55:57,569 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2018-09-30 23:55:57,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-09-30 23:55:57,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:57,570 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 76, 1, 1, 1] [2018-09-30 23:55:57,571 INFO L423 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:57,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:57,571 INFO L82 PathProgramCache]: Analyzing trace with hash -551757687, now seen corresponding path program 76 times [2018-09-30 23:55:57,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:57,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:57,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:57,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:57,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:59,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8855 backedges. 77 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:59,872 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:59,872 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:59,880 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:55:59,948 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:55:59,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:59,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8855 backedges. 77 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:00,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:00,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 23:56:00,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 23:56:00,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 23:56:00,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:56:00,020 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand 79 states. [2018-09-30 23:56:00,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:00,190 INFO L93 Difference]: Finished difference Result 240 states and 245 transitions. [2018-09-30 23:56:00,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 23:56:00,191 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 233 [2018-09-30 23:56:00,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:00,191 INFO L225 Difference]: With dead ends: 240 [2018-09-30 23:56:00,191 INFO L226 Difference]: Without dead ends: 236 [2018-09-30 23:56:00,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:56:00,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2018-09-30 23:56:00,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2018-09-30 23:56:00,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-09-30 23:56:00,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 238 transitions. [2018-09-30 23:56:00,195 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 238 transitions. Word has length 233 [2018-09-30 23:56:00,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:00,195 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 238 transitions. [2018-09-30 23:56:00,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 23:56:00,195 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 238 transitions. [2018-09-30 23:56:00,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-09-30 23:56:00,196 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:00,196 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 77, 1, 1] [2018-09-30 23:56:00,196 INFO L423 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:00,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:00,197 INFO L82 PathProgramCache]: Analyzing trace with hash -551757625, now seen corresponding path program 50 times [2018-09-30 23:56:00,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:00,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:00,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:00,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:00,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8855 backedges. 0 proven. 8855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:02,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:02,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:02,686 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:56:02,756 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:56:02,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:02,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:02,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8855 backedges. 0 proven. 8855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:02,825 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:02,826 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 23:56:02,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 23:56:02,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 23:56:02,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:56:02,827 INFO L87 Difference]: Start difference. First operand 236 states and 238 transitions. Second operand 80 states. [2018-09-30 23:56:02,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:02,999 INFO L93 Difference]: Finished difference Result 242 states and 248 transitions. [2018-09-30 23:56:03,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 23:56:03,000 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 233 [2018-09-30 23:56:03,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:03,001 INFO L225 Difference]: With dead ends: 242 [2018-09-30 23:56:03,001 INFO L226 Difference]: Without dead ends: 238 [2018-09-30 23:56:03,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:56:03,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-09-30 23:56:03,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2018-09-30 23:56:03,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-09-30 23:56:03,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 240 transitions. [2018-09-30 23:56:03,018 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 240 transitions. Word has length 233 [2018-09-30 23:56:03,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:03,019 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 240 transitions. [2018-09-30 23:56:03,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 23:56:03,019 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 240 transitions. [2018-09-30 23:56:03,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-09-30 23:56:03,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:03,020 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 77, 1, 1, 1] [2018-09-30 23:56:03,020 INFO L423 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:03,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:03,020 INFO L82 PathProgramCache]: Analyzing trace with hash -571972587, now seen corresponding path program 77 times [2018-09-30 23:56:03,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:03,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:03,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:03,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:03,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9087 backedges. 78 proven. 9009 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:05,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:05,257 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:05,269 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:56:05,432 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2018-09-30 23:56:05,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:05,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9087 backedges. 78 proven. 9009 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:05,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:05,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 23:56:05,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 23:56:05,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 23:56:05,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:56:05,504 INFO L87 Difference]: Start difference. First operand 238 states and 240 transitions. Second operand 80 states. [2018-09-30 23:56:05,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:05,686 INFO L93 Difference]: Finished difference Result 243 states and 248 transitions. [2018-09-30 23:56:05,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 23:56:05,686 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 236 [2018-09-30 23:56:05,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:05,687 INFO L225 Difference]: With dead ends: 243 [2018-09-30 23:56:05,687 INFO L226 Difference]: Without dead ends: 239 [2018-09-30 23:56:05,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:56:05,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-09-30 23:56:05,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-09-30 23:56:05,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-09-30 23:56:05,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 241 transitions. [2018-09-30 23:56:05,692 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 241 transitions. Word has length 236 [2018-09-30 23:56:05,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:05,692 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 241 transitions. [2018-09-30 23:56:05,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 23:56:05,692 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 241 transitions. [2018-09-30 23:56:05,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-09-30 23:56:05,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:05,693 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 78, 1, 1] [2018-09-30 23:56:05,693 INFO L423 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:05,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:05,694 INFO L82 PathProgramCache]: Analyzing trace with hash -571972525, now seen corresponding path program 51 times [2018-09-30 23:56:05,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:05,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:05,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:05,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:05,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9087 backedges. 0 proven. 9087 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:08,295 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:08,295 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:08,307 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:56:08,472 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 79 check-sat command(s) [2018-09-30 23:56:08,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:08,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9087 backedges. 0 proven. 9087 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:08,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:08,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 23:56:08,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 23:56:08,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 23:56:08,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:56:08,557 INFO L87 Difference]: Start difference. First operand 239 states and 241 transitions. Second operand 81 states. [2018-09-30 23:56:08,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:08,825 INFO L93 Difference]: Finished difference Result 245 states and 251 transitions. [2018-09-30 23:56:08,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 23:56:08,825 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 236 [2018-09-30 23:56:08,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:08,825 INFO L225 Difference]: With dead ends: 245 [2018-09-30 23:56:08,826 INFO L226 Difference]: Without dead ends: 241 [2018-09-30 23:56:08,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:56:08,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-09-30 23:56:08,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-09-30 23:56:08,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-09-30 23:56:08,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 243 transitions. [2018-09-30 23:56:08,830 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 243 transitions. Word has length 236 [2018-09-30 23:56:08,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:08,830 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 243 transitions. [2018-09-30 23:56:08,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 23:56:08,830 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 243 transitions. [2018-09-30 23:56:08,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-09-30 23:56:08,831 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:08,831 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 78, 1, 1, 1] [2018-09-30 23:56:08,832 INFO L423 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:08,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:08,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1498637047, now seen corresponding path program 78 times [2018-09-30 23:56:08,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:08,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:08,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:08,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:08,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9322 backedges. 79 proven. 9243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:11,166 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:11,166 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:11,175 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:56:11,341 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 80 check-sat command(s) [2018-09-30 23:56:11,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:11,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:16,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9322 backedges. 0 proven. 9322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:16,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:16,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-09-30 23:56:16,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 161 states [2018-09-30 23:56:16,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2018-09-30 23:56:16,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6560, Invalid=19200, Unknown=0, NotChecked=0, Total=25760 [2018-09-30 23:56:16,270 INFO L87 Difference]: Start difference. First operand 241 states and 243 transitions. Second operand 161 states. [2018-09-30 23:56:28,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:28,435 INFO L93 Difference]: Finished difference Result 248 states and 255 transitions. [2018-09-30 23:56:28,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2018-09-30 23:56:28,436 INFO L78 Accepts]: Start accepts. Automaton has 161 states. Word has length 239 [2018-09-30 23:56:28,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:28,436 INFO L225 Difference]: With dead ends: 248 [2018-09-30 23:56:28,436 INFO L226 Difference]: Without dead ends: 244 [2018-09-30 23:56:28,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18643 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=31998, Invalid=69444, Unknown=0, NotChecked=0, Total=101442 [2018-09-30 23:56:28,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-09-30 23:56:28,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2018-09-30 23:56:28,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-09-30 23:56:28,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 246 transitions. [2018-09-30 23:56:28,442 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 246 transitions. Word has length 239 [2018-09-30 23:56:28,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:28,442 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 246 transitions. [2018-09-30 23:56:28,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 161 states. [2018-09-30 23:56:28,443 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 246 transitions. [2018-09-30 23:56:28,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-30 23:56:28,443 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:28,443 INFO L375 BasicCegarLoop]: trace histogram [80, 80, 79, 1, 1, 1] [2018-09-30 23:56:28,443 INFO L423 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:28,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:28,444 INFO L82 PathProgramCache]: Analyzing trace with hash 290213781, now seen corresponding path program 79 times [2018-09-30 23:56:28,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:28,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:28,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:28,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:28,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9560 backedges. 80 proven. 9480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:30,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:30,794 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:30,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:30,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9560 backedges. 80 proven. 9480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:30,963 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:30,963 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 23:56:30,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 23:56:30,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 23:56:30,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:56:30,964 INFO L87 Difference]: Start difference. First operand 244 states and 246 transitions. Second operand 82 states. [2018-09-30 23:56:31,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:31,164 INFO L93 Difference]: Finished difference Result 249 states and 254 transitions. [2018-09-30 23:56:31,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 23:56:31,164 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 242 [2018-09-30 23:56:31,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:31,165 INFO L225 Difference]: With dead ends: 249 [2018-09-30 23:56:31,165 INFO L226 Difference]: Without dead ends: 245 [2018-09-30 23:56:31,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:56:31,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-09-30 23:56:31,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2018-09-30 23:56:31,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-09-30 23:56:31,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2018-09-30 23:56:31,170 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 242 [2018-09-30 23:56:31,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:31,170 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2018-09-30 23:56:31,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 23:56:31,171 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2018-09-30 23:56:31,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-30 23:56:31,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:31,171 INFO L375 BasicCegarLoop]: trace histogram [80, 80, 80, 1, 1] [2018-09-30 23:56:31,171 INFO L423 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:31,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:31,172 INFO L82 PathProgramCache]: Analyzing trace with hash 290213843, now seen corresponding path program 52 times [2018-09-30 23:56:31,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:31,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:31,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:31,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:31,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:33,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9560 backedges. 0 proven. 9560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:33,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:33,925 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:33,933 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:56:34,005 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:56:34,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:34,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9560 backedges. 0 proven. 9560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:34,078 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:34,078 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 23:56:34,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 23:56:34,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 23:56:34,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:56:34,079 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand 83 states. [2018-09-30 23:56:34,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:34,394 INFO L93 Difference]: Finished difference Result 251 states and 257 transitions. [2018-09-30 23:56:34,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 23:56:34,394 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 242 [2018-09-30 23:56:34,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:34,395 INFO L225 Difference]: With dead ends: 251 [2018-09-30 23:56:34,395 INFO L226 Difference]: Without dead ends: 247 [2018-09-30 23:56:34,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:56:34,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-09-30 23:56:34,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-09-30 23:56:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-09-30 23:56:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 249 transitions. [2018-09-30 23:56:34,399 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 249 transitions. Word has length 242 [2018-09-30 23:56:34,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:34,399 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 249 transitions. [2018-09-30 23:56:34,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 23:56:34,399 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 249 transitions. [2018-09-30 23:56:34,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-09-30 23:56:34,400 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:34,400 INFO L375 BasicCegarLoop]: trace histogram [81, 81, 80, 1, 1, 1] [2018-09-30 23:56:34,400 INFO L423 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:34,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:34,401 INFO L82 PathProgramCache]: Analyzing trace with hash -8978039, now seen corresponding path program 80 times [2018-09-30 23:56:34,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:34,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:34,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:34,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:34,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 81 proven. 9720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:36,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:36,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:36,819 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:56:36,887 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:56:36,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:36,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 81 proven. 9720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:36,970 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:36,970 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 23:56:36,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 23:56:36,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 23:56:36,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:56:36,971 INFO L87 Difference]: Start difference. First operand 247 states and 249 transitions. Second operand 83 states. [2018-09-30 23:56:37,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:37,212 INFO L93 Difference]: Finished difference Result 252 states and 257 transitions. [2018-09-30 23:56:37,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 23:56:37,212 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 245 [2018-09-30 23:56:37,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:37,213 INFO L225 Difference]: With dead ends: 252 [2018-09-30 23:56:37,213 INFO L226 Difference]: Without dead ends: 248 [2018-09-30 23:56:37,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:56:37,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-09-30 23:56:37,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2018-09-30 23:56:37,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-09-30 23:56:37,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 250 transitions. [2018-09-30 23:56:37,217 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 250 transitions. Word has length 245 [2018-09-30 23:56:37,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:37,218 INFO L480 AbstractCegarLoop]: Abstraction has 248 states and 250 transitions. [2018-09-30 23:56:37,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 23:56:37,218 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 250 transitions. [2018-09-30 23:56:37,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-09-30 23:56:37,218 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:37,218 INFO L375 BasicCegarLoop]: trace histogram [81, 81, 81, 1, 1] [2018-09-30 23:56:37,219 INFO L423 AbstractCegarLoop]: === Iteration 135 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:37,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:37,219 INFO L82 PathProgramCache]: Analyzing trace with hash -8977977, now seen corresponding path program 53 times [2018-09-30 23:56:37,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:37,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:37,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:37,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:37,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:39,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:39,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:39,954 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:56:40,115 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 82 check-sat command(s) [2018-09-30 23:56:40,115 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:40,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:40,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:40,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 23:56:40,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 23:56:40,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 23:56:40,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:56:40,198 INFO L87 Difference]: Start difference. First operand 248 states and 250 transitions. Second operand 84 states. [2018-09-30 23:56:40,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:40,524 INFO L93 Difference]: Finished difference Result 254 states and 260 transitions. [2018-09-30 23:56:40,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 23:56:40,524 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 245 [2018-09-30 23:56:40,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:40,524 INFO L225 Difference]: With dead ends: 254 [2018-09-30 23:56:40,525 INFO L226 Difference]: Without dead ends: 250 [2018-09-30 23:56:40,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:56:40,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-09-30 23:56:40,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2018-09-30 23:56:40,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-09-30 23:56:40,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 252 transitions. [2018-09-30 23:56:40,529 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 252 transitions. Word has length 245 [2018-09-30 23:56:40,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:40,530 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 252 transitions. [2018-09-30 23:56:40,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 23:56:40,530 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 252 transitions. [2018-09-30 23:56:40,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-30 23:56:40,530 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:40,531 INFO L375 BasicCegarLoop]: trace histogram [82, 82, 81, 1, 1, 1] [2018-09-30 23:56:40,531 INFO L423 AbstractCegarLoop]: === Iteration 136 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:40,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:40,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1175348459, now seen corresponding path program 81 times [2018-09-30 23:56:40,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:40,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:40,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:40,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:40,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10045 backedges. 82 proven. 9963 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:42,944 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:42,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:42,951 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:56:43,143 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 83 check-sat command(s) [2018-09-30 23:56:43,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:43,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10045 backedges. 0 proven. 10045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:48,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:48,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 166 [2018-09-30 23:56:48,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 167 states [2018-09-30 23:56:48,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2018-09-30 23:56:48,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7055, Invalid=20667, Unknown=0, NotChecked=0, Total=27722 [2018-09-30 23:56:48,306 INFO L87 Difference]: Start difference. First operand 250 states and 252 transitions. Second operand 167 states. [2018-09-30 23:57:01,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:01,149 INFO L93 Difference]: Finished difference Result 257 states and 264 transitions. [2018-09-30 23:57:01,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2018-09-30 23:57:01,149 INFO L78 Accepts]: Start accepts. Automaton has 167 states. Word has length 248 [2018-09-30 23:57:01,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:01,150 INFO L225 Difference]: With dead ends: 257 [2018-09-30 23:57:01,150 INFO L226 Difference]: Without dead ends: 253 [2018-09-30 23:57:01,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20089 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=34443, Invalid=74787, Unknown=0, NotChecked=0, Total=109230 [2018-09-30 23:57:01,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-09-30 23:57:01,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-09-30 23:57:01,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-09-30 23:57:01,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 255 transitions. [2018-09-30 23:57:01,158 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 255 transitions. Word has length 248 [2018-09-30 23:57:01,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:01,158 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 255 transitions. [2018-09-30 23:57:01,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 167 states. [2018-09-30 23:57:01,158 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 255 transitions. [2018-09-30 23:57:01,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-09-30 23:57:01,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:01,159 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 82, 1, 1, 1] [2018-09-30 23:57:01,159 INFO L423 AbstractCegarLoop]: === Iteration 137 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:01,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:01,159 INFO L82 PathProgramCache]: Analyzing trace with hash 2063861257, now seen corresponding path program 82 times [2018-09-30 23:57:01,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:01,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:01,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:01,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:01,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:03,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10292 backedges. 83 proven. 10209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:03,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:03,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:03,759 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:03,833 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:03,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:03,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10292 backedges. 83 proven. 10209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:03,910 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:03,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 23:57:03,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 23:57:03,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 23:57:03,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:57:03,912 INFO L87 Difference]: Start difference. First operand 253 states and 255 transitions. Second operand 85 states. [2018-09-30 23:57:04,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:04,104 INFO L93 Difference]: Finished difference Result 258 states and 263 transitions. [2018-09-30 23:57:04,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 23:57:04,104 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 251 [2018-09-30 23:57:04,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:04,105 INFO L225 Difference]: With dead ends: 258 [2018-09-30 23:57:04,105 INFO L226 Difference]: Without dead ends: 254 [2018-09-30 23:57:04,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:57:04,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-09-30 23:57:04,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2018-09-30 23:57:04,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-09-30 23:57:04,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 256 transitions. [2018-09-30 23:57:04,110 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 256 transitions. Word has length 251 [2018-09-30 23:57:04,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:04,110 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 256 transitions. [2018-09-30 23:57:04,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 23:57:04,110 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 256 transitions. [2018-09-30 23:57:04,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-09-30 23:57:04,111 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:04,111 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 83, 1, 1] [2018-09-30 23:57:04,111 INFO L423 AbstractCegarLoop]: === Iteration 138 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:04,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:04,111 INFO L82 PathProgramCache]: Analyzing trace with hash 2063861319, now seen corresponding path program 54 times [2018-09-30 23:57:04,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:04,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:04,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:04,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:04,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 10292 backedges. 0 proven. 10292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:06,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:06,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:06,734 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:06,911 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 84 check-sat command(s) [2018-09-30 23:57:06,911 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:06,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10292 backedges. 0 proven. 10292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:06,988 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:06,988 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 23:57:06,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 23:57:06,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 23:57:06,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:57:06,990 INFO L87 Difference]: Start difference. First operand 254 states and 256 transitions. Second operand 86 states. [2018-09-30 23:57:07,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:07,236 INFO L93 Difference]: Finished difference Result 260 states and 266 transitions. [2018-09-30 23:57:07,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 23:57:07,236 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 251 [2018-09-30 23:57:07,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:07,237 INFO L225 Difference]: With dead ends: 260 [2018-09-30 23:57:07,237 INFO L226 Difference]: Without dead ends: 256 [2018-09-30 23:57:07,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:57:07,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-09-30 23:57:07,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2018-09-30 23:57:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-09-30 23:57:07,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 258 transitions. [2018-09-30 23:57:07,241 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 258 transitions. Word has length 251 [2018-09-30 23:57:07,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:07,241 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 258 transitions. [2018-09-30 23:57:07,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 23:57:07,241 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 258 transitions. [2018-09-30 23:57:07,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-09-30 23:57:07,242 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:07,242 INFO L375 BasicCegarLoop]: trace histogram [84, 84, 83, 1, 1, 1] [2018-09-30 23:57:07,242 INFO L423 AbstractCegarLoop]: === Iteration 139 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:07,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:07,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2035304085, now seen corresponding path program 83 times [2018-09-30 23:57:07,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:07,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:07,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:07,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:07,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10542 backedges. 84 proven. 10458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:10,256 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:10,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:10,263 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:10,434 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-09-30 23:57:10,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:10,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10542 backedges. 84 proven. 10458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:10,511 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:10,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 23:57:10,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 23:57:10,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 23:57:10,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:57:10,512 INFO L87 Difference]: Start difference. First operand 256 states and 258 transitions. Second operand 86 states. [2018-09-30 23:57:10,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:10,857 INFO L93 Difference]: Finished difference Result 261 states and 266 transitions. [2018-09-30 23:57:10,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 23:57:10,858 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 254 [2018-09-30 23:57:10,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:10,859 INFO L225 Difference]: With dead ends: 261 [2018-09-30 23:57:10,859 INFO L226 Difference]: Without dead ends: 257 [2018-09-30 23:57:10,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:57:10,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-09-30 23:57:10,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2018-09-30 23:57:10,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-09-30 23:57:10,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 259 transitions. [2018-09-30 23:57:10,865 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 259 transitions. Word has length 254 [2018-09-30 23:57:10,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:10,865 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 259 transitions. [2018-09-30 23:57:10,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 23:57:10,866 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 259 transitions. [2018-09-30 23:57:10,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-09-30 23:57:10,866 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:10,867 INFO L375 BasicCegarLoop]: trace histogram [84, 84, 84, 1, 1] [2018-09-30 23:57:10,867 INFO L423 AbstractCegarLoop]: === Iteration 140 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:10,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:10,867 INFO L82 PathProgramCache]: Analyzing trace with hash 2035304147, now seen corresponding path program 55 times [2018-09-30 23:57:10,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:10,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:10,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:10,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:10,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10542 backedges. 0 proven. 10542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:13,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:13,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:13,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:13,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10542 backedges. 0 proven. 10542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:13,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:13,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 23:57:13,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 23:57:13,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 23:57:13,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:57:13,889 INFO L87 Difference]: Start difference. First operand 257 states and 259 transitions. Second operand 87 states. [2018-09-30 23:57:14,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:14,268 INFO L93 Difference]: Finished difference Result 263 states and 269 transitions. [2018-09-30 23:57:14,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 23:57:14,268 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 254 [2018-09-30 23:57:14,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:14,269 INFO L225 Difference]: With dead ends: 263 [2018-09-30 23:57:14,269 INFO L226 Difference]: Without dead ends: 259 [2018-09-30 23:57:14,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:57:14,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-30 23:57:14,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-09-30 23:57:14,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-30 23:57:14,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 261 transitions. [2018-09-30 23:57:14,274 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 261 transitions. Word has length 254 [2018-09-30 23:57:14,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:14,274 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 261 transitions. [2018-09-30 23:57:14,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 23:57:14,274 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 261 transitions. [2018-09-30 23:57:14,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-09-30 23:57:14,275 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:14,275 INFO L375 BasicCegarLoop]: trace histogram [85, 85, 84, 1, 1, 1] [2018-09-30 23:57:14,275 INFO L423 AbstractCegarLoop]: === Iteration 141 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:14,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:14,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1692117641, now seen corresponding path program 84 times [2018-09-30 23:57:14,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:14,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:14,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:14,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:14,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10795 backedges. 85 proven. 10710 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:16,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:16,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:16,990 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:17,169 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2018-09-30 23:57:17,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:17,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10795 backedges. 0 proven. 10795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:22,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:22,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 172 [2018-09-30 23:57:22,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 173 states [2018-09-30 23:57:22,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2018-09-30 23:57:22,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7568, Invalid=22188, Unknown=0, NotChecked=0, Total=29756 [2018-09-30 23:57:22,854 INFO L87 Difference]: Start difference. First operand 259 states and 261 transitions. Second operand 173 states. [2018-09-30 23:57:36,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:36,527 INFO L93 Difference]: Finished difference Result 266 states and 273 transitions. [2018-09-30 23:57:36,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2018-09-30 23:57:36,528 INFO L78 Accepts]: Start accepts. Automaton has 173 states. Word has length 257 [2018-09-30 23:57:36,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:36,528 INFO L225 Difference]: With dead ends: 266 [2018-09-30 23:57:36,528 INFO L226 Difference]: Without dead ends: 262 [2018-09-30 23:57:36,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21589 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=36978, Invalid=80328, Unknown=0, NotChecked=0, Total=117306 [2018-09-30 23:57:36,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2018-09-30 23:57:36,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2018-09-30 23:57:36,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-09-30 23:57:36,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 264 transitions. [2018-09-30 23:57:36,535 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 264 transitions. Word has length 257 [2018-09-30 23:57:36,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:36,535 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 264 transitions. [2018-09-30 23:57:36,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 173 states. [2018-09-30 23:57:36,535 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 264 transitions. [2018-09-30 23:57:36,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-09-30 23:57:36,536 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:36,536 INFO L375 BasicCegarLoop]: trace histogram [86, 86, 85, 1, 1, 1] [2018-09-30 23:57:36,536 INFO L423 AbstractCegarLoop]: === Iteration 142 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:36,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:36,536 INFO L82 PathProgramCache]: Analyzing trace with hash -153071083, now seen corresponding path program 85 times [2018-09-30 23:57:36,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:36,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:36,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:36,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:36,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11051 backedges. 86 proven. 10965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:39,264 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:39,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:39,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:39,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:39,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11051 backedges. 86 proven. 10965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:39,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:39,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 23:57:39,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 23:57:39,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 23:57:39,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:57:39,431 INFO L87 Difference]: Start difference. First operand 262 states and 264 transitions. Second operand 88 states. [2018-09-30 23:57:39,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:39,741 INFO L93 Difference]: Finished difference Result 267 states and 272 transitions. [2018-09-30 23:57:39,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 23:57:39,742 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 260 [2018-09-30 23:57:39,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:39,742 INFO L225 Difference]: With dead ends: 267 [2018-09-30 23:57:39,742 INFO L226 Difference]: Without dead ends: 263 [2018-09-30 23:57:39,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:57:39,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-09-30 23:57:39,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-09-30 23:57:39,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-09-30 23:57:39,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 265 transitions. [2018-09-30 23:57:39,746 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 265 transitions. Word has length 260 [2018-09-30 23:57:39,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:39,747 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 265 transitions. [2018-09-30 23:57:39,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 23:57:39,747 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 265 transitions. [2018-09-30 23:57:39,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-09-30 23:57:39,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:39,748 INFO L375 BasicCegarLoop]: trace histogram [86, 86, 86, 1, 1] [2018-09-30 23:57:39,748 INFO L423 AbstractCegarLoop]: === Iteration 143 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:39,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:39,748 INFO L82 PathProgramCache]: Analyzing trace with hash -153071021, now seen corresponding path program 56 times [2018-09-30 23:57:39,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:39,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:39,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:39,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:39,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11051 backedges. 0 proven. 11051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:42,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:42,552 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:42,560 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:42,645 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:42,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:42,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11051 backedges. 0 proven. 11051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:42,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:42,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 23:57:42,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 23:57:42,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 23:57:42,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:57:42,743 INFO L87 Difference]: Start difference. First operand 263 states and 265 transitions. Second operand 89 states. [2018-09-30 23:57:43,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:43,141 INFO L93 Difference]: Finished difference Result 269 states and 275 transitions. [2018-09-30 23:57:43,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 23:57:43,141 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 260 [2018-09-30 23:57:43,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:43,142 INFO L225 Difference]: With dead ends: 269 [2018-09-30 23:57:43,142 INFO L226 Difference]: Without dead ends: 265 [2018-09-30 23:57:43,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:57:43,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-09-30 23:57:43,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2018-09-30 23:57:43,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-09-30 23:57:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 267 transitions. [2018-09-30 23:57:43,146 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 267 transitions. Word has length 260 [2018-09-30 23:57:43,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:43,147 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 267 transitions. [2018-09-30 23:57:43,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 23:57:43,147 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 267 transitions. [2018-09-30 23:57:43,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-09-30 23:57:43,147 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:43,148 INFO L375 BasicCegarLoop]: trace histogram [87, 87, 86, 1, 1, 1] [2018-09-30 23:57:43,148 INFO L423 AbstractCegarLoop]: === Iteration 144 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:43,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:43,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1116073737, now seen corresponding path program 86 times [2018-09-30 23:57:43,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:43,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:43,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:43,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:43,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11310 backedges. 87 proven. 11223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:46,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:46,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:46,268 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:46,346 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:46,346 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:46,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:46,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11310 backedges. 87 proven. 11223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:46,427 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:46,427 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 23:57:46,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 23:57:46,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 23:57:46,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:57:46,428 INFO L87 Difference]: Start difference. First operand 265 states and 267 transitions. Second operand 89 states. [2018-09-30 23:57:46,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:46,696 INFO L93 Difference]: Finished difference Result 270 states and 275 transitions. [2018-09-30 23:57:46,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 23:57:46,696 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 263 [2018-09-30 23:57:46,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:46,697 INFO L225 Difference]: With dead ends: 270 [2018-09-30 23:57:46,697 INFO L226 Difference]: Without dead ends: 266 [2018-09-30 23:57:46,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:57:46,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-09-30 23:57:46,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2018-09-30 23:57:46,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2018-09-30 23:57:46,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 268 transitions. [2018-09-30 23:57:46,703 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 268 transitions. Word has length 263 [2018-09-30 23:57:46,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:46,703 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 268 transitions. [2018-09-30 23:57:46,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 23:57:46,703 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 268 transitions. [2018-09-30 23:57:46,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-09-30 23:57:46,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:46,704 INFO L375 BasicCegarLoop]: trace histogram [87, 87, 87, 1, 1] [2018-09-30 23:57:46,704 INFO L423 AbstractCegarLoop]: === Iteration 145 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:46,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:46,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1116073799, now seen corresponding path program 57 times [2018-09-30 23:57:46,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:46,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:46,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:46,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:46,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11310 backedges. 0 proven. 11310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:49,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:49,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:49,593 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:49,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-30 23:57:49,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:49,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11310 backedges. 0 proven. 11310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:49,883 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:49,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 23:57:49,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 23:57:49,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 23:57:49,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:57:49,885 INFO L87 Difference]: Start difference. First operand 266 states and 268 transitions. Second operand 90 states. [2018-09-30 23:57:50,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:50,179 INFO L93 Difference]: Finished difference Result 272 states and 278 transitions. [2018-09-30 23:57:50,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 23:57:50,180 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 263 [2018-09-30 23:57:50,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:50,181 INFO L225 Difference]: With dead ends: 272 [2018-09-30 23:57:50,181 INFO L226 Difference]: Without dead ends: 268 [2018-09-30 23:57:50,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:57:50,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-09-30 23:57:50,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2018-09-30 23:57:50,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-09-30 23:57:50,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 270 transitions. [2018-09-30 23:57:50,187 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 270 transitions. Word has length 263 [2018-09-30 23:57:50,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:50,187 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 270 transitions. [2018-09-30 23:57:50,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 23:57:50,187 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 270 transitions. [2018-09-30 23:57:50,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-09-30 23:57:50,188 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:50,188 INFO L375 BasicCegarLoop]: trace histogram [88, 88, 87, 1, 1, 1] [2018-09-30 23:57:50,189 INFO L423 AbstractCegarLoop]: === Iteration 146 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:50,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:50,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1612299669, now seen corresponding path program 87 times [2018-09-30 23:57:50,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:50,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:50,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:50,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:50,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11572 backedges. 88 proven. 11484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:53,127 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:53,128 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:53,136 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:53,333 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 89 check-sat command(s) [2018-09-30 23:57:53,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:53,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 11572 backedges. 0 proven. 11572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:59,409 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:59,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 178 [2018-09-30 23:57:59,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 179 states [2018-09-30 23:57:59,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2018-09-30 23:57:59,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8099, Invalid=23763, Unknown=0, NotChecked=0, Total=31862 [2018-09-30 23:57:59,411 INFO L87 Difference]: Start difference. First operand 268 states and 270 transitions. Second operand 179 states. [2018-09-30 23:58:14,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:14,063 INFO L93 Difference]: Finished difference Result 275 states and 282 transitions. [2018-09-30 23:58:14,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2018-09-30 23:58:14,064 INFO L78 Accepts]: Start accepts. Automaton has 179 states. Word has length 266 [2018-09-30 23:58:14,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:14,065 INFO L225 Difference]: With dead ends: 275 [2018-09-30 23:58:14,065 INFO L226 Difference]: Without dead ends: 271 [2018-09-30 23:58:14,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23143 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=39603, Invalid=86067, Unknown=0, NotChecked=0, Total=125670 [2018-09-30 23:58:14,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-09-30 23:58:14,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-09-30 23:58:14,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-09-30 23:58:14,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 273 transitions. [2018-09-30 23:58:14,071 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 273 transitions. Word has length 266 [2018-09-30 23:58:14,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:14,071 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 273 transitions. [2018-09-30 23:58:14,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 179 states. [2018-09-30 23:58:14,071 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 273 transitions. [2018-09-30 23:58:14,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2018-09-30 23:58:14,072 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:14,072 INFO L375 BasicCegarLoop]: trace histogram [89, 89, 88, 1, 1, 1] [2018-09-30 23:58:14,072 INFO L423 AbstractCegarLoop]: === Iteration 147 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:14,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:14,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1401607049, now seen corresponding path program 88 times [2018-09-30 23:58:14,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:14,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:14,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:14,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:14,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:14,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11837 backedges. 89 proven. 11748 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:17,325 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:17,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:17,332 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:17,410 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:17,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:17,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11837 backedges. 0 proven. 11837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:23,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:23,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 180 [2018-09-30 23:58:23,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 181 states [2018-09-30 23:58:23,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 181 interpolants. [2018-09-30 23:58:23,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8280, Invalid=24300, Unknown=0, NotChecked=0, Total=32580 [2018-09-30 23:58:23,759 INFO L87 Difference]: Start difference. First operand 271 states and 273 transitions. Second operand 181 states. [2018-09-30 23:58:38,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:38,914 INFO L93 Difference]: Finished difference Result 278 states and 285 transitions. [2018-09-30 23:58:38,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2018-09-30 23:58:38,915 INFO L78 Accepts]: Start accepts. Automaton has 181 states. Word has length 269 [2018-09-30 23:58:38,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:38,915 INFO L225 Difference]: With dead ends: 278 [2018-09-30 23:58:38,916 INFO L226 Difference]: Without dead ends: 274 [2018-09-30 23:58:38,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 357 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23673 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=40498, Invalid=88024, Unknown=0, NotChecked=0, Total=128522 [2018-09-30 23:58:38,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-09-30 23:58:38,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2018-09-30 23:58:38,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-09-30 23:58:38,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 276 transitions. [2018-09-30 23:58:38,922 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 276 transitions. Word has length 269 [2018-09-30 23:58:38,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:38,922 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 276 transitions. [2018-09-30 23:58:38,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 181 states. [2018-09-30 23:58:38,922 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 276 transitions. [2018-09-30 23:58:38,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-09-30 23:58:38,923 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:38,923 INFO L375 BasicCegarLoop]: trace histogram [90, 90, 89, 1, 1, 1] [2018-09-30 23:58:38,924 INFO L423 AbstractCegarLoop]: === Iteration 148 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:38,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:38,924 INFO L82 PathProgramCache]: Analyzing trace with hash -395015915, now seen corresponding path program 89 times [2018-09-30 23:58:38,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:38,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:38,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:38,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:38,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12105 backedges. 90 proven. 12015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:42,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:42,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:42,232 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:42,436 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 91 check-sat command(s) [2018-09-30 23:58:42,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:42,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12105 backedges. 90 proven. 12015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:42,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:42,527 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 23:58:42,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 23:58:42,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 23:58:42,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:58:42,528 INFO L87 Difference]: Start difference. First operand 274 states and 276 transitions. Second operand 92 states. [2018-09-30 23:58:42,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:42,767 INFO L93 Difference]: Finished difference Result 279 states and 284 transitions. [2018-09-30 23:58:42,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 23:58:42,768 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 272 [2018-09-30 23:58:42,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:42,769 INFO L225 Difference]: With dead ends: 279 [2018-09-30 23:58:42,769 INFO L226 Difference]: Without dead ends: 275 [2018-09-30 23:58:42,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:58:42,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-09-30 23:58:42,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2018-09-30 23:58:42,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-09-30 23:58:42,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 277 transitions. [2018-09-30 23:58:42,774 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 277 transitions. Word has length 272 [2018-09-30 23:58:42,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:42,774 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 277 transitions. [2018-09-30 23:58:42,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 23:58:42,774 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 277 transitions. [2018-09-30 23:58:42,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-09-30 23:58:42,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:42,775 INFO L375 BasicCegarLoop]: trace histogram [90, 90, 90, 1, 1] [2018-09-30 23:58:42,775 INFO L423 AbstractCegarLoop]: === Iteration 149 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:42,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:42,776 INFO L82 PathProgramCache]: Analyzing trace with hash -395015853, now seen corresponding path program 58 times [2018-09-30 23:58:42,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:42,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:42,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:42,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:42,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12105 backedges. 0 proven. 12105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:45,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:45,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:45,839 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:45,919 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:45,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:45,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12105 backedges. 0 proven. 12105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:46,004 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:46,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 23:58:46,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 23:58:46,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 23:58:46,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:58:46,006 INFO L87 Difference]: Start difference. First operand 275 states and 277 transitions. Second operand 93 states. [2018-09-30 23:58:46,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:46,288 INFO L93 Difference]: Finished difference Result 281 states and 287 transitions. [2018-09-30 23:58:46,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 23:58:46,289 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 272 [2018-09-30 23:58:46,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:46,289 INFO L225 Difference]: With dead ends: 281 [2018-09-30 23:58:46,290 INFO L226 Difference]: Without dead ends: 277 [2018-09-30 23:58:46,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:58:46,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2018-09-30 23:58:46,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2018-09-30 23:58:46,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-09-30 23:58:46,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 279 transitions. [2018-09-30 23:58:46,294 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 279 transitions. Word has length 272 [2018-09-30 23:58:46,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:46,294 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 279 transitions. [2018-09-30 23:58:46,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 23:58:46,294 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 279 transitions. [2018-09-30 23:58:46,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-09-30 23:58:46,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:46,295 INFO L375 BasicCegarLoop]: trace histogram [91, 91, 90, 1, 1, 1] [2018-09-30 23:58:46,295 INFO L423 AbstractCegarLoop]: === Iteration 150 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:46,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:46,295 INFO L82 PathProgramCache]: Analyzing trace with hash 292706313, now seen corresponding path program 90 times [2018-09-30 23:58:46,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:46,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:46,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:46,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:46,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12376 backedges. 91 proven. 12285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:49,297 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:49,297 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:49,305 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:49,505 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 92 check-sat command(s) [2018-09-30 23:58:49,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:49,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12376 backedges. 0 proven. 12376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:55,882 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:55,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 184 [2018-09-30 23:58:55,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 185 states [2018-09-30 23:58:55,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2018-09-30 23:58:55,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=25392, Unknown=0, NotChecked=0, Total=34040 [2018-09-30 23:58:55,884 INFO L87 Difference]: Start difference. First operand 277 states and 279 transitions. Second operand 185 states. [2018-09-30 23:59:11,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:11,651 INFO L93 Difference]: Finished difference Result 284 states and 291 transitions. [2018-09-30 23:59:11,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2018-09-30 23:59:11,651 INFO L78 Accepts]: Start accepts. Automaton has 185 states. Word has length 275 [2018-09-30 23:59:11,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:11,652 INFO L225 Difference]: With dead ends: 284 [2018-09-30 23:59:11,652 INFO L226 Difference]: Without dead ends: 280 [2018-09-30 23:59:11,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24751 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=42318, Invalid=92004, Unknown=0, NotChecked=0, Total=134322 [2018-09-30 23:59:11,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-09-30 23:59:11,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2018-09-30 23:59:11,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-09-30 23:59:11,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 282 transitions. [2018-09-30 23:59:11,658 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 282 transitions. Word has length 275 [2018-09-30 23:59:11,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:11,659 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 282 transitions. [2018-09-30 23:59:11,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 185 states. [2018-09-30 23:59:11,659 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 282 transitions. [2018-09-30 23:59:11,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-09-30 23:59:11,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:11,660 INFO L375 BasicCegarLoop]: trace histogram [92, 92, 91, 1, 1, 1] [2018-09-30 23:59:11,660 INFO L423 AbstractCegarLoop]: === Iteration 151 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:11,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:11,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1231598741, now seen corresponding path program 91 times [2018-09-30 23:59:11,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:11,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:11,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:11,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:11,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12650 backedges. 92 proven. 12558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:14,929 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:14,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:14,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:15,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:15,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12650 backedges. 92 proven. 12558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:15,104 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:15,105 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 23:59:15,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 23:59:15,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 23:59:15,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:59:15,106 INFO L87 Difference]: Start difference. First operand 280 states and 282 transitions. Second operand 94 states. [2018-09-30 23:59:15,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:15,433 INFO L93 Difference]: Finished difference Result 285 states and 290 transitions. [2018-09-30 23:59:15,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 23:59:15,434 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 278 [2018-09-30 23:59:15,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:15,435 INFO L225 Difference]: With dead ends: 285 [2018-09-30 23:59:15,435 INFO L226 Difference]: Without dead ends: 281 [2018-09-30 23:59:15,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:59:15,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-09-30 23:59:15,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2018-09-30 23:59:15,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-09-30 23:59:15,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 283 transitions. [2018-09-30 23:59:15,441 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 283 transitions. Word has length 278 [2018-09-30 23:59:15,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:15,442 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 283 transitions. [2018-09-30 23:59:15,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 23:59:15,442 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 283 transitions. [2018-09-30 23:59:15,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-09-30 23:59:15,443 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:15,443 INFO L375 BasicCegarLoop]: trace histogram [92, 92, 92, 1, 1] [2018-09-30 23:59:15,443 INFO L423 AbstractCegarLoop]: === Iteration 152 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:15,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:15,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1231598803, now seen corresponding path program 59 times [2018-09-30 23:59:15,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:15,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:15,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:15,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:15,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12650 backedges. 0 proven. 12650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:18,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:18,978 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:18,985 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:19,199 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 93 check-sat command(s) [2018-09-30 23:59:19,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:19,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12650 backedges. 0 proven. 12650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:19,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:19,288 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 23:59:19,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 23:59:19,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 23:59:19,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:59:19,290 INFO L87 Difference]: Start difference. First operand 281 states and 283 transitions. Second operand 95 states. [2018-09-30 23:59:19,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:19,734 INFO L93 Difference]: Finished difference Result 287 states and 293 transitions. [2018-09-30 23:59:19,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 23:59:19,735 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 278 [2018-09-30 23:59:19,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:19,735 INFO L225 Difference]: With dead ends: 287 [2018-09-30 23:59:19,735 INFO L226 Difference]: Without dead ends: 283 [2018-09-30 23:59:19,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:59:19,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-09-30 23:59:19,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-09-30 23:59:19,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-09-30 23:59:19,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 285 transitions. [2018-09-30 23:59:19,740 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 285 transitions. Word has length 278 [2018-09-30 23:59:19,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:19,740 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 285 transitions. [2018-09-30 23:59:19,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 23:59:19,740 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 285 transitions. [2018-09-30 23:59:19,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2018-09-30 23:59:19,741 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:19,741 INFO L375 BasicCegarLoop]: trace histogram [93, 93, 92, 1, 1, 1] [2018-09-30 23:59:19,741 INFO L423 AbstractCegarLoop]: === Iteration 153 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:19,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:19,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1346077559, now seen corresponding path program 92 times [2018-09-30 23:59:19,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:19,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:19,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:19,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:19,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12927 backedges. 93 proven. 12834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:23,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:23,216 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:23,225 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:23,309 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:23,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:23,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12927 backedges. 93 proven. 12834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:23,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:23,400 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 23:59:23,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 23:59:23,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 23:59:23,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:59:23,401 INFO L87 Difference]: Start difference. First operand 283 states and 285 transitions. Second operand 95 states. [2018-09-30 23:59:23,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:23,841 INFO L93 Difference]: Finished difference Result 288 states and 293 transitions. [2018-09-30 23:59:23,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 23:59:23,841 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 281 [2018-09-30 23:59:23,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:23,842 INFO L225 Difference]: With dead ends: 288 [2018-09-30 23:59:23,842 INFO L226 Difference]: Without dead ends: 284 [2018-09-30 23:59:23,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:59:23,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2018-09-30 23:59:23,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2018-09-30 23:59:23,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-09-30 23:59:23,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 286 transitions. [2018-09-30 23:59:23,847 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 286 transitions. Word has length 281 [2018-09-30 23:59:23,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:23,847 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 286 transitions. [2018-09-30 23:59:23,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 23:59:23,847 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 286 transitions. [2018-09-30 23:59:23,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2018-09-30 23:59:23,848 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:23,848 INFO L375 BasicCegarLoop]: trace histogram [93, 93, 93, 1, 1] [2018-09-30 23:59:23,849 INFO L423 AbstractCegarLoop]: === Iteration 154 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:23,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:23,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1346077497, now seen corresponding path program 60 times [2018-09-30 23:59:23,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:23,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:23,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:23,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:23,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12927 backedges. 0 proven. 12927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:27,326 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:27,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:27,333 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:27,542 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 94 check-sat command(s) [2018-09-30 23:59:27,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:27,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:27,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12927 backedges. 0 proven. 12927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:27,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:27,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 23:59:27,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 23:59:27,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 23:59:27,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:59:27,635 INFO L87 Difference]: Start difference. First operand 284 states and 286 transitions. Second operand 96 states. [2018-09-30 23:59:27,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:27,986 INFO L93 Difference]: Finished difference Result 290 states and 296 transitions. [2018-09-30 23:59:27,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 23:59:27,987 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 281 [2018-09-30 23:59:27,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:27,988 INFO L225 Difference]: With dead ends: 290 [2018-09-30 23:59:27,988 INFO L226 Difference]: Without dead ends: 286 [2018-09-30 23:59:27,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:59:27,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2018-09-30 23:59:27,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2018-09-30 23:59:27,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2018-09-30 23:59:27,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 288 transitions. [2018-09-30 23:59:27,993 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 288 transitions. Word has length 281 [2018-09-30 23:59:27,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:27,994 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 288 transitions. [2018-09-30 23:59:27,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 23:59:27,994 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 288 transitions. [2018-09-30 23:59:27,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-09-30 23:59:27,995 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:27,995 INFO L375 BasicCegarLoop]: trace histogram [94, 94, 93, 1, 1, 1] [2018-09-30 23:59:27,995 INFO L423 AbstractCegarLoop]: === Iteration 155 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:27,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:27,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1114521621, now seen corresponding path program 93 times [2018-09-30 23:59:27,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:27,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:27,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:27,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:27,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 13207 backedges. 94 proven. 13113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:31,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:31,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:31,229 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:31,459 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 95 check-sat command(s) [2018-09-30 23:59:31,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:31,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:31,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13207 backedges. 94 proven. 13113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:31,548 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:31,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 23:59:31,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 23:59:31,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 23:59:31,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:59:31,550 INFO L87 Difference]: Start difference. First operand 286 states and 288 transitions. Second operand 96 states. [2018-09-30 23:59:31,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:31,796 INFO L93 Difference]: Finished difference Result 291 states and 296 transitions. [2018-09-30 23:59:31,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 23:59:31,797 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 284 [2018-09-30 23:59:31,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:31,797 INFO L225 Difference]: With dead ends: 291 [2018-09-30 23:59:31,798 INFO L226 Difference]: Without dead ends: 287 [2018-09-30 23:59:31,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:59:31,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-09-30 23:59:31,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2018-09-30 23:59:31,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-09-30 23:59:31,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 289 transitions. [2018-09-30 23:59:31,804 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 289 transitions. Word has length 284 [2018-09-30 23:59:31,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:31,804 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 289 transitions. [2018-09-30 23:59:31,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 23:59:31,804 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 289 transitions. [2018-09-30 23:59:31,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-09-30 23:59:31,805 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:31,805 INFO L375 BasicCegarLoop]: trace histogram [94, 94, 94, 1, 1] [2018-09-30 23:59:31,805 INFO L423 AbstractCegarLoop]: === Iteration 156 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:31,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:31,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1114521683, now seen corresponding path program 61 times [2018-09-30 23:59:31,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:31,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:31,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:31,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:31,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13207 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:35,328 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:35,328 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:35,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:35,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 13207 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:35,509 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:35,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 23:59:35,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 23:59:35,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 23:59:35,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:59:35,511 INFO L87 Difference]: Start difference. First operand 287 states and 289 transitions. Second operand 97 states. [2018-09-30 23:59:35,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:35,971 INFO L93 Difference]: Finished difference Result 293 states and 299 transitions. [2018-09-30 23:59:35,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 23:59:35,971 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 284 [2018-09-30 23:59:35,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:35,972 INFO L225 Difference]: With dead ends: 293 [2018-09-30 23:59:35,972 INFO L226 Difference]: Without dead ends: 289 [2018-09-30 23:59:35,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:59:35,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2018-09-30 23:59:35,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2018-09-30 23:59:35,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-09-30 23:59:35,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 291 transitions. [2018-09-30 23:59:35,976 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 291 transitions. Word has length 284 [2018-09-30 23:59:35,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:35,976 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 291 transitions. [2018-09-30 23:59:35,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 23:59:35,976 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 291 transitions. [2018-09-30 23:59:35,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-09-30 23:59:35,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:35,977 INFO L375 BasicCegarLoop]: trace histogram [95, 95, 94, 1, 1, 1] [2018-09-30 23:59:35,977 INFO L423 AbstractCegarLoop]: === Iteration 157 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:35,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:35,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1677115127, now seen corresponding path program 94 times [2018-09-30 23:59:35,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:35,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:35,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:35,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:35,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 13490 backedges. 95 proven. 13395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:39,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:39,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:39,580 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:39,666 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:39,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:39,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 13490 backedges. 0 proven. 13490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:46,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:46,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 192 [2018-09-30 23:59:46,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 193 states [2018-09-30 23:59:46,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2018-09-30 23:59:46,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9408, Invalid=27648, Unknown=0, NotChecked=0, Total=37056 [2018-09-30 23:59:46,689 INFO L87 Difference]: Start difference. First operand 289 states and 291 transitions. Second operand 193 states. [2018-10-01 00:00:03,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:03,974 INFO L93 Difference]: Finished difference Result 296 states and 303 transitions. [2018-10-01 00:00:03,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2018-10-01 00:00:03,974 INFO L78 Accepts]: Start accepts. Automaton has 193 states. Word has length 287 [2018-10-01 00:00:03,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:03,975 INFO L225 Difference]: With dead ends: 296 [2018-10-01 00:00:03,975 INFO L226 Difference]: Without dead ends: 292 [2018-10-01 00:00:03,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26979 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=46078, Invalid=100228, Unknown=0, NotChecked=0, Total=146306 [2018-10-01 00:00:03,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-10-01 00:00:03,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2018-10-01 00:00:03,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-10-01 00:00:03,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 294 transitions. [2018-10-01 00:00:03,984 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 294 transitions. Word has length 287 [2018-10-01 00:00:03,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:03,984 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 294 transitions. [2018-10-01 00:00:03,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 193 states. [2018-10-01 00:00:03,985 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 294 transitions. [2018-10-01 00:00:03,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-10-01 00:00:03,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:03,985 INFO L375 BasicCegarLoop]: trace histogram [96, 96, 95, 1, 1, 1] [2018-10-01 00:00:03,986 INFO L423 AbstractCegarLoop]: === Iteration 158 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:03,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:03,986 INFO L82 PathProgramCache]: Analyzing trace with hash 419244949, now seen corresponding path program 95 times [2018-10-01 00:00:03,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:03,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:03,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:03,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:03,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13776 backedges. 96 proven. 13680 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:07,457 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:07,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:07,465 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:00:07,693 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 97 check-sat command(s) [2018-10-01 00:00:07,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:07,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 13776 backedges. 96 proven. 13680 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:07,785 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:07,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-01 00:00:07,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-01 00:00:07,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-01 00:00:07,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-01 00:00:07,787 INFO L87 Difference]: Start difference. First operand 292 states and 294 transitions. Second operand 98 states. [2018-10-01 00:00:08,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:08,162 INFO L93 Difference]: Finished difference Result 297 states and 302 transitions. [2018-10-01 00:00:08,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-01 00:00:08,163 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 290 [2018-10-01 00:00:08,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:08,163 INFO L225 Difference]: With dead ends: 297 [2018-10-01 00:00:08,163 INFO L226 Difference]: Without dead ends: 293 [2018-10-01 00:00:08,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-01 00:00:08,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-10-01 00:00:08,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2018-10-01 00:00:08,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-10-01 00:00:08,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 295 transitions. [2018-10-01 00:00:08,169 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 295 transitions. Word has length 290 [2018-10-01 00:00:08,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:08,169 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 295 transitions. [2018-10-01 00:00:08,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-01 00:00:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 295 transitions. [2018-10-01 00:00:08,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-10-01 00:00:08,170 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:08,170 INFO L375 BasicCegarLoop]: trace histogram [96, 96, 96, 1, 1] [2018-10-01 00:00:08,170 INFO L423 AbstractCegarLoop]: === Iteration 159 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:08,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:08,171 INFO L82 PathProgramCache]: Analyzing trace with hash 419245011, now seen corresponding path program 62 times [2018-10-01 00:00:08,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:08,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:08,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:08,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:08,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 13776 backedges. 0 proven. 13776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:11,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:11,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:11,709 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:11,795 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:11,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:11,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13776 backedges. 0 proven. 13776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:11,913 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:11,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-01 00:00:11,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-01 00:00:11,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-01 00:00:11,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-01 00:00:11,914 INFO L87 Difference]: Start difference. First operand 293 states and 295 transitions. Second operand 99 states. [2018-10-01 00:00:12,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:12,171 INFO L93 Difference]: Finished difference Result 299 states and 305 transitions. [2018-10-01 00:00:12,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-01 00:00:12,171 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 290 [2018-10-01 00:00:12,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:12,172 INFO L225 Difference]: With dead ends: 299 [2018-10-01 00:00:12,172 INFO L226 Difference]: Without dead ends: 295 [2018-10-01 00:00:12,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-01 00:00:12,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-10-01 00:00:12,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2018-10-01 00:00:12,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-10-01 00:00:12,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 297 transitions. [2018-10-01 00:00:12,178 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 297 transitions. Word has length 290 [2018-10-01 00:00:12,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:12,178 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 297 transitions. [2018-10-01 00:00:12,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-01 00:00:12,178 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 297 transitions. [2018-10-01 00:00:12,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-10-01 00:00:12,179 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:12,179 INFO L375 BasicCegarLoop]: trace histogram [97, 97, 96, 1, 1, 1] [2018-10-01 00:00:12,179 INFO L423 AbstractCegarLoop]: === Iteration 160 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:12,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:12,179 INFO L82 PathProgramCache]: Analyzing trace with hash -37182071, now seen corresponding path program 96 times [2018-10-01 00:00:12,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:12,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:12,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:12,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:12,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 14065 backedges. 97 proven. 13968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:15,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:15,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:15,830 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:00:16,069 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 98 check-sat command(s) [2018-10-01 00:00:16,069 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:16,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 14065 backedges. 0 proven. 14065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:23,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:23,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 196 [2018-10-01 00:00:23,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 197 states [2018-10-01 00:00:23,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2018-10-01 00:00:23,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9800, Invalid=28812, Unknown=0, NotChecked=0, Total=38612 [2018-10-01 00:00:23,307 INFO L87 Difference]: Start difference. First operand 295 states and 297 transitions. Second operand 197 states. [2018-10-01 00:00:41,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:41,198 INFO L93 Difference]: Finished difference Result 302 states and 309 transitions. [2018-10-01 00:00:41,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2018-10-01 00:00:41,198 INFO L78 Accepts]: Start accepts. Automaton has 197 states. Word has length 293 [2018-10-01 00:00:41,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:41,199 INFO L225 Difference]: With dead ends: 302 [2018-10-01 00:00:41,199 INFO L226 Difference]: Without dead ends: 298 [2018-10-01 00:00:41,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28129 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=48018, Invalid=104472, Unknown=0, NotChecked=0, Total=152490 [2018-10-01 00:00:41,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-10-01 00:00:41,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2018-10-01 00:00:41,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2018-10-01 00:00:41,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 300 transitions. [2018-10-01 00:00:41,208 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 300 transitions. Word has length 293 [2018-10-01 00:00:41,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:41,208 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 300 transitions. [2018-10-01 00:00:41,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 197 states. [2018-10-01 00:00:41,209 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 300 transitions. [2018-10-01 00:00:41,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-10-01 00:00:41,210 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:41,210 INFO L375 BasicCegarLoop]: trace histogram [98, 98, 97, 1, 1, 1] [2018-10-01 00:00:41,210 INFO L423 AbstractCegarLoop]: === Iteration 161 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:41,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:41,210 INFO L82 PathProgramCache]: Analyzing trace with hash 411924245, now seen corresponding path program 97 times [2018-10-01 00:00:41,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:41,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:41,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:41,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:41,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 14357 backedges. 98 proven. 14259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:45,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:45,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:45,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:45,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 14357 backedges. 98 proven. 14259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:45,531 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:45,531 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-01 00:00:45,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-01 00:00:45,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-01 00:00:45,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-01 00:00:45,533 INFO L87 Difference]: Start difference. First operand 298 states and 300 transitions. Second operand 100 states. [2018-10-01 00:00:45,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:45,997 INFO L93 Difference]: Finished difference Result 303 states and 308 transitions. [2018-10-01 00:00:45,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-01 00:00:45,998 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 296 [2018-10-01 00:00:45,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:45,998 INFO L225 Difference]: With dead ends: 303 [2018-10-01 00:00:45,998 INFO L226 Difference]: Without dead ends: 299 [2018-10-01 00:00:45,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-01 00:00:45,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-10-01 00:00:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2018-10-01 00:00:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-10-01 00:00:46,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 301 transitions. [2018-10-01 00:00:46,004 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 301 transitions. Word has length 296 [2018-10-01 00:00:46,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:46,004 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 301 transitions. [2018-10-01 00:00:46,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-01 00:00:46,004 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 301 transitions. [2018-10-01 00:00:46,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-10-01 00:00:46,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:46,005 INFO L375 BasicCegarLoop]: trace histogram [98, 98, 98, 1, 1] [2018-10-01 00:00:46,005 INFO L423 AbstractCegarLoop]: === Iteration 162 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:46,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:46,006 INFO L82 PathProgramCache]: Analyzing trace with hash 411924307, now seen corresponding path program 63 times [2018-10-01 00:00:46,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:46,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:46,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:46,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:46,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 14357 backedges. 0 proven. 14357 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:49,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:49,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:49,862 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:00:50,089 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 99 check-sat command(s) [2018-10-01 00:00:50,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:50,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 14357 backedges. 0 proven. 14357 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:50,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:50,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-01 00:00:50,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-01 00:00:50,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-01 00:00:50,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-01 00:00:50,187 INFO L87 Difference]: Start difference. First operand 299 states and 301 transitions. Second operand 101 states. [2018-10-01 00:00:50,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:50,608 INFO L93 Difference]: Finished difference Result 305 states and 311 transitions. [2018-10-01 00:00:50,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-01 00:00:50,609 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 296 [2018-10-01 00:00:50,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:50,609 INFO L225 Difference]: With dead ends: 305 [2018-10-01 00:00:50,609 INFO L226 Difference]: Without dead ends: 301 [2018-10-01 00:00:50,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-01 00:00:50,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2018-10-01 00:00:50,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2018-10-01 00:00:50,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-10-01 00:00:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 303 transitions. [2018-10-01 00:00:50,615 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 303 transitions. Word has length 296 [2018-10-01 00:00:50,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:50,615 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 303 transitions. [2018-10-01 00:00:50,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-01 00:00:50,615 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 303 transitions. [2018-10-01 00:00:50,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2018-10-01 00:00:50,616 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:50,616 INFO L375 BasicCegarLoop]: trace histogram [99, 99, 98, 1, 1, 1] [2018-10-01 00:00:50,617 INFO L423 AbstractCegarLoop]: === Iteration 163 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:50,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:50,617 INFO L82 PathProgramCache]: Analyzing trace with hash 915057161, now seen corresponding path program 98 times [2018-10-01 00:00:50,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:50,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:50,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:50,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:50,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 14652 backedges. 99 proven. 14553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:54,530 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:54,530 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:54,537 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:54,627 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:54,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:54,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 14652 backedges. 99 proven. 14553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:54,722 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:54,722 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-01 00:00:54,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-01 00:00:54,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-01 00:00:54,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-01 00:00:54,723 INFO L87 Difference]: Start difference. First operand 301 states and 303 transitions. Second operand 101 states. [2018-10-01 00:00:55,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:55,150 INFO L93 Difference]: Finished difference Result 306 states and 311 transitions. [2018-10-01 00:00:55,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-01 00:00:55,151 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 299 [2018-10-01 00:00:55,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:55,151 INFO L225 Difference]: With dead ends: 306 [2018-10-01 00:00:55,152 INFO L226 Difference]: Without dead ends: 302 [2018-10-01 00:00:55,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-01 00:00:55,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-10-01 00:00:55,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2018-10-01 00:00:55,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2018-10-01 00:00:55,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 304 transitions. [2018-10-01 00:00:55,156 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 304 transitions. Word has length 299 [2018-10-01 00:00:55,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:55,156 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 304 transitions. [2018-10-01 00:00:55,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-01 00:00:55,156 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 304 transitions. [2018-10-01 00:00:55,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2018-10-01 00:00:55,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:55,157 INFO L375 BasicCegarLoop]: trace histogram [99, 99, 99, 1, 1] [2018-10-01 00:00:55,157 INFO L423 AbstractCegarLoop]: === Iteration 164 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:55,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:55,158 INFO L82 PathProgramCache]: Analyzing trace with hash 915057223, now seen corresponding path program 64 times [2018-10-01 00:00:55,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:55,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:55,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:55,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:55,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:55,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:58,812 INFO L134 CoverageAnalysis]: Checked inductivity of 14652 backedges. 0 proven. 14652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:58,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:58,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:58,819 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:00:58,902 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:58,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:58,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 14652 backedges. 0 proven. 14652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:58,997 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:58,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-01 00:00:58,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-01 00:00:58,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-01 00:00:58,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-01 00:00:58,998 INFO L87 Difference]: Start difference. First operand 302 states and 304 transitions. Second operand 102 states. [2018-10-01 00:00:59,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:59,483 INFO L93 Difference]: Finished difference Result 308 states and 314 transitions. [2018-10-01 00:00:59,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-01 00:00:59,483 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 299 [2018-10-01 00:00:59,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:59,484 INFO L225 Difference]: With dead ends: 308 [2018-10-01 00:00:59,484 INFO L226 Difference]: Without dead ends: 304 [2018-10-01 00:00:59,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-01 00:00:59,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2018-10-01 00:00:59,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2018-10-01 00:00:59,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-10-01 00:00:59,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 306 transitions. [2018-10-01 00:00:59,490 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 306 transitions. Word has length 299 [2018-10-01 00:00:59,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:59,490 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 306 transitions. [2018-10-01 00:00:59,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-01 00:00:59,490 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 306 transitions. [2018-10-01 00:00:59,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-10-01 00:00:59,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:59,492 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 99, 1, 1, 1] [2018-10-01 00:00:59,492 INFO L423 AbstractCegarLoop]: === Iteration 165 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:59,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:59,492 INFO L82 PathProgramCache]: Analyzing trace with hash 311894677, now seen corresponding path program 99 times [2018-10-01 00:00:59,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:59,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:59,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:59,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:59,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 14950 backedges. 100 proven. 14850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:03,086 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:03,086 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:03,102 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:01:03,366 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 101 check-sat command(s) [2018-10-01 00:01:03,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:03,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 14950 backedges. 100 proven. 14850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:03,469 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:03,469 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-01 00:01:03,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-01 00:01:03,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-01 00:01:03,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-01 00:01:03,470 INFO L87 Difference]: Start difference. First operand 304 states and 306 transitions. Second operand 102 states. [2018-10-01 00:01:03,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:03,995 INFO L93 Difference]: Finished difference Result 309 states and 314 transitions. [2018-10-01 00:01:03,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-01 00:01:03,995 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 302 [2018-10-01 00:01:03,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:03,996 INFO L225 Difference]: With dead ends: 309 [2018-10-01 00:01:03,996 INFO L226 Difference]: Without dead ends: 305 [2018-10-01 00:01:03,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-01 00:01:03,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2018-10-01 00:01:04,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2018-10-01 00:01:04,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-10-01 00:01:04,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 307 transitions. [2018-10-01 00:01:04,000 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 307 transitions. Word has length 302 [2018-10-01 00:01:04,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:04,001 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 307 transitions. [2018-10-01 00:01:04,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-01 00:01:04,001 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 307 transitions. [2018-10-01 00:01:04,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-10-01 00:01:04,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:04,002 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 100, 1, 1] [2018-10-01 00:01:04,002 INFO L423 AbstractCegarLoop]: === Iteration 166 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:04,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:04,002 INFO L82 PathProgramCache]: Analyzing trace with hash 311894739, now seen corresponding path program 65 times [2018-10-01 00:01:04,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:04,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:04,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:04,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:04,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 14950 backedges. 0 proven. 14950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:09,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:09,427 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:09,434 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:01:09,696 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 101 check-sat command(s) [2018-10-01 00:01:09,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:09,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 14950 backedges. 0 proven. 14950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:10,091 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:10,092 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-01 00:01:10,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-01 00:01:10,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-01 00:01:10,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=10303, Unknown=0, NotChecked=0, Total=10506 [2018-10-01 00:01:10,093 INFO L87 Difference]: Start difference. First operand 305 states and 307 transitions. Second operand 103 states. [2018-10-01 00:01:17,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:17,069 INFO L93 Difference]: Finished difference Result 312 states and 319 transitions. [2018-10-01 00:01:17,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-01 00:01:17,069 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 302 [2018-10-01 00:01:17,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:17,070 INFO L225 Difference]: With dead ends: 312 [2018-10-01 00:01:17,070 INFO L226 Difference]: Without dead ends: 308 [2018-10-01 00:01:17,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 299 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=203, Invalid=10303, Unknown=0, NotChecked=0, Total=10506 [2018-10-01 00:01:17,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-10-01 00:01:17,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2018-10-01 00:01:17,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2018-10-01 00:01:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 311 transitions. [2018-10-01 00:01:17,078 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 311 transitions. Word has length 302 [2018-10-01 00:01:17,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:17,078 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 311 transitions. [2018-10-01 00:01:17,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-01 00:01:17,078 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 311 transitions. [2018-10-01 00:01:17,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-10-01 00:01:17,080 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:17,080 INFO L375 BasicCegarLoop]: trace histogram [101, 101, 100, 1, 1, 1] [2018-10-01 00:01:17,080 INFO L423 AbstractCegarLoop]: === Iteration 167 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:17,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:17,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1641498437, now seen corresponding path program 1 times [2018-10-01 00:01:17,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:17,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:17,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:17,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:17,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 15251 backedges. 201 proven. 15050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:22,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:22,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:22,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:22,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 15251 backedges. 201 proven. 15050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:22,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:22,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-01 00:01:22,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-01 00:01:22,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-01 00:01:22,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-01 00:01:22,487 INFO L87 Difference]: Start difference. First operand 308 states and 311 transitions. Second operand 103 states. [2018-10-01 00:01:22,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:22,755 INFO L93 Difference]: Finished difference Result 313 states and 318 transitions. [2018-10-01 00:01:22,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-01 00:01:22,756 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 305 [2018-10-01 00:01:22,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:22,757 INFO L225 Difference]: With dead ends: 313 [2018-10-01 00:01:22,757 INFO L226 Difference]: Without dead ends: 308 [2018-10-01 00:01:22,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-01 00:01:22,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-10-01 00:01:22,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2018-10-01 00:01:22,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2018-10-01 00:01:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 310 transitions. [2018-10-01 00:01:22,763 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 310 transitions. Word has length 305 [2018-10-01 00:01:22,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:22,764 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 310 transitions. [2018-10-01 00:01:22,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-01 00:01:22,764 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 310 transitions. [2018-10-01 00:01:22,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-10-01 00:01:22,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:22,765 INFO L375 BasicCegarLoop]: trace histogram [101, 101, 101, 1, 1] [2018-10-01 00:01:22,765 INFO L423 AbstractCegarLoop]: === Iteration 168 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:22,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:22,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1641500359, now seen corresponding path program 66 times [2018-10-01 00:01:22,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:22,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:22,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:22,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:22,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 15251 backedges. 15251 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:27,650 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-01 00:01:27,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2018-10-01 00:01:27,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-01 00:01:27,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-01 00:01:27,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-01 00:01:27,651 INFO L87 Difference]: Start difference. First operand 308 states and 310 transitions. Second operand 104 states. [2018-10-01 00:01:28,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:28,741 INFO L93 Difference]: Finished difference Result 609 states and 910 transitions. [2018-10-01 00:01:28,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-01 00:01:28,741 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 305 [2018-10-01 00:01:28,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:28,747 INFO L225 Difference]: With dead ends: 609 [2018-10-01 00:01:28,747 INFO L226 Difference]: Without dead ends: 608 [2018-10-01 00:01:28,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-01 00:01:28,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2018-10-01 00:01:28,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 607. [2018-10-01 00:01:28,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2018-10-01 00:01:28,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 907 transitions. [2018-10-01 00:01:28,772 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 907 transitions. Word has length 305 [2018-10-01 00:01:28,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:28,772 INFO L480 AbstractCegarLoop]: Abstraction has 607 states and 907 transitions. [2018-10-01 00:01:28,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-01 00:01:28,772 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 907 transitions. [2018-10-01 00:01:28,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-10-01 00:01:28,774 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:28,774 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 101, 1, 1, 1, 1] [2018-10-01 00:01:28,774 INFO L423 AbstractCegarLoop]: === Iteration 169 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:28,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:28,774 INFO L82 PathProgramCache]: Analyzing trace with hash -560847213, now seen corresponding path program 1 times [2018-10-01 00:01:28,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:28,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:28,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:28,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:28,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 15555 backedges. 203 proven. 15352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:32,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:32,925 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:32,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:33,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 15555 backedges. 203 proven. 15352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:33,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:33,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-01 00:01:33,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-01 00:01:33,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-01 00:01:33,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-01 00:01:33,152 INFO L87 Difference]: Start difference. First operand 607 states and 907 transitions. Second operand 104 states. [2018-10-01 00:01:33,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:33,440 INFO L93 Difference]: Finished difference Result 912 states and 1513 transitions. [2018-10-01 00:01:33,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-01 00:01:33,440 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 308 [2018-10-01 00:01:33,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:33,442 INFO L225 Difference]: With dead ends: 912 [2018-10-01 00:01:33,442 INFO L226 Difference]: Without dead ends: 609 [2018-10-01 00:01:33,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-01 00:01:33,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2018-10-01 00:01:33,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 609. [2018-10-01 00:01:33,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 609 states. [2018-10-01 00:01:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 909 transitions. [2018-10-01 00:01:33,457 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 909 transitions. Word has length 308 [2018-10-01 00:01:33,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:33,458 INFO L480 AbstractCegarLoop]: Abstraction has 609 states and 909 transitions. [2018-10-01 00:01:33,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-01 00:01:33,458 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 909 transitions. [2018-10-01 00:01:33,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2018-10-01 00:01:33,459 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:33,459 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 101, 2, 1, 1, 1] [2018-10-01 00:01:33,459 INFO L423 AbstractCegarLoop]: === Iteration 170 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:33,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:33,460 INFO L82 PathProgramCache]: Analyzing trace with hash -719692667, now seen corresponding path program 2 times [2018-10-01 00:01:33,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:33,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:33,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:33,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:33,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:33,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 15862 backedges. 408 proven. 15453 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-01 00:01:37,701 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:37,702 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:37,709 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:01:37,801 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:01:37,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:37,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 15862 backedges. 408 proven. 15453 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-01 00:01:37,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:37,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-01 00:01:37,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-01 00:01:37,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-01 00:01:37,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-01 00:01:37,909 INFO L87 Difference]: Start difference. First operand 609 states and 909 transitions. Second operand 104 states. [2018-10-01 00:01:38,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:38,310 INFO L93 Difference]: Finished difference Result 913 states and 1514 transitions. [2018-10-01 00:01:38,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-01 00:01:38,317 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 311 [2018-10-01 00:01:38,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:38,318 INFO L225 Difference]: With dead ends: 913 [2018-10-01 00:01:38,318 INFO L226 Difference]: Without dead ends: 610 [2018-10-01 00:01:38,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-01 00:01:38,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2018-10-01 00:01:38,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2018-10-01 00:01:38,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 610 states. [2018-10-01 00:01:38,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 910 transitions. [2018-10-01 00:01:38,333 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 910 transitions. Word has length 311 [2018-10-01 00:01:38,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:38,334 INFO L480 AbstractCegarLoop]: Abstraction has 610 states and 910 transitions. [2018-10-01 00:01:38,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-01 00:01:38,334 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 910 transitions. [2018-10-01 00:01:38,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2018-10-01 00:01:38,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:38,335 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 102, 1, 1, 1, 1] [2018-10-01 00:01:38,336 INFO L423 AbstractCegarLoop]: === Iteration 171 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:38,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:38,336 INFO L82 PathProgramCache]: Analyzing trace with hash -717845625, now seen corresponding path program 3 times [2018-10-01 00:01:38,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:38,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:38,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:38,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:38,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 15862 backedges. 205 proven. 15657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:42,763 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:42,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:42,771 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:01:42,787 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-01 00:01:42,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:42,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 15862 backedges. 510 proven. 0 refuted. 0 times theorem prover too weak. 15352 trivial. 0 not checked. [2018-10-01 00:01:42,965 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:01:42,965 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [104] total 106 [2018-10-01 00:01:42,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-01 00:01:42,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-01 00:01:42,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-01 00:01:42,967 INFO L87 Difference]: Start difference. First operand 610 states and 910 transitions. Second operand 106 states. [2018-10-01 00:01:44,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:44,242 INFO L93 Difference]: Finished difference Result 920 states and 1525 transitions. [2018-10-01 00:01:44,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-01 00:01:44,242 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 311 [2018-10-01 00:01:44,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:44,244 INFO L225 Difference]: With dead ends: 920 [2018-10-01 00:01:44,244 INFO L226 Difference]: Without dead ends: 617 [2018-10-01 00:01:44,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-01 00:01:44,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2018-10-01 00:01:44,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 617. [2018-10-01 00:01:44,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2018-10-01 00:01:44,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 721 transitions. [2018-10-01 00:01:44,258 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 721 transitions. Word has length 311 [2018-10-01 00:01:44,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:44,259 INFO L480 AbstractCegarLoop]: Abstraction has 617 states and 721 transitions. [2018-10-01 00:01:44,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-01 00:01:44,259 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 721 transitions. [2018-10-01 00:01:44,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2018-10-01 00:01:44,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:44,263 INFO L375 BasicCegarLoop]: trace histogram [203, 202, 102, 101, 1, 1, 1] [2018-10-01 00:01:44,263 INFO L423 AbstractCegarLoop]: === Iteration 172 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:44,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:44,263 INFO L82 PathProgramCache]: Analyzing trace with hash -326427701, now seen corresponding path program 4 times [2018-10-01 00:01:44,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:44,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:44,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:44,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:44,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 61712 backedges. 31003 proven. 15759 refuted. 0 times theorem prover too weak. 14950 trivial. 0 not checked. [2018-10-01 00:01:48,700 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:48,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-01 00:01:48,709 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:48,883 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:01:48,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:48,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 61712 backedges. 31003 proven. 15759 refuted. 0 times theorem prover too weak. 14950 trivial. 0 not checked. [2018-10-01 00:01:49,194 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:49,194 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-01 00:01:49,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-01 00:01:49,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-01 00:01:49,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-01 00:01:49,196 INFO L87 Difference]: Start difference. First operand 617 states and 721 transitions. Second operand 105 states. [2018-10-01 00:01:49,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:49,620 INFO L93 Difference]: Finished difference Result 930 states and 1139 transitions. [2018-10-01 00:01:49,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-01 00:01:49,620 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 611 [2018-10-01 00:01:49,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:49,621 INFO L225 Difference]: With dead ends: 930 [2018-10-01 00:01:49,621 INFO L226 Difference]: Without dead ends: 620 [2018-10-01 00:01:49,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 611 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-01 00:01:49,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2018-10-01 00:01:49,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2018-10-01 00:01:49,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2018-10-01 00:01:49,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 724 transitions. [2018-10-01 00:01:49,636 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 724 transitions. Word has length 611 [2018-10-01 00:01:49,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:49,636 INFO L480 AbstractCegarLoop]: Abstraction has 620 states and 724 transitions. [2018-10-01 00:01:49,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-01 00:01:49,636 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 724 transitions. [2018-10-01 00:01:49,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2018-10-01 00:01:49,640 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:49,640 INFO L375 BasicCegarLoop]: trace histogram [203, 202, 103, 100, 1, 1, 1] [2018-10-01 00:01:49,640 INFO L423 AbstractCegarLoop]: === Iteration 173 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:49,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:49,640 INFO L82 PathProgramCache]: Analyzing trace with hash 345405193, now seen corresponding path program 5 times [2018-10-01 00:01:49,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:49,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:49,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:49,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:49,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 61712 backedges. 30996 proven. 15965 refuted. 0 times theorem prover too weak. 14751 trivial. 0 not checked. [2018-10-01 00:01:54,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:54,546 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:54,555 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:01:54,699 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 56 check-sat command(s) [2018-10-01 00:01:54,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:54,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:57,098 INFO L134 CoverageAnalysis]: Checked inductivity of 61712 backedges. 38532 proven. 1785 refuted. 0 times theorem prover too weak. 21395 trivial. 0 not checked. [2018-10-01 00:01:57,118 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:57,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 38] total 142 [2018-10-01 00:01:57,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-10-01 00:01:57,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-10-01 00:01:57,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6267, Invalid=13755, Unknown=0, NotChecked=0, Total=20022 [2018-10-01 00:01:57,120 INFO L87 Difference]: Start difference. First operand 620 states and 724 transitions. Second operand 142 states. [2018-10-01 00:02:04,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:04,172 INFO L93 Difference]: Finished difference Result 1242 states and 1555 transitions. [2018-10-01 00:02:04,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-01 00:02:04,173 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 611 [2018-10-01 00:02:04,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:04,175 INFO L225 Difference]: With dead ends: 1242 [2018-10-01 00:02:04,175 INFO L226 Difference]: Without dead ends: 932 [2018-10-01 00:02:04,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 576 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9340 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=21225, Invalid=40031, Unknown=0, NotChecked=0, Total=61256 [2018-10-01 00:02:04,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2018-10-01 00:02:04,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 926. [2018-10-01 00:02:04,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2018-10-01 00:02:04,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1032 transitions. [2018-10-01 00:02:04,198 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1032 transitions. Word has length 611 [2018-10-01 00:02:04,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:04,198 INFO L480 AbstractCegarLoop]: Abstraction has 926 states and 1032 transitions. [2018-10-01 00:02:04,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-10-01 00:02:04,198 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1032 transitions. [2018-10-01 00:02:04,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2018-10-01 00:02:04,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:04,202 INFO L375 BasicCegarLoop]: trace histogram [204, 203, 153, 51, 1, 1, 1] [2018-10-01 00:02:04,202 INFO L423 AbstractCegarLoop]: === Iteration 174 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:04,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:04,203 INFO L82 PathProgramCache]: Analyzing trace with hash -709363397, now seen corresponding path program 6 times [2018-10-01 00:02:04,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:04,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:04,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:04,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:04,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:08,822 INFO L134 CoverageAnalysis]: Checked inductivity of 62322 backedges. 31304 proven. 16068 refuted. 0 times theorem prover too weak. 14950 trivial. 0 not checked. [2018-10-01 00:02:08,823 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:08,823 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:08,829 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:02:08,874 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-01 00:02:08,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:08,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 62322 backedges. 2019 proven. 3 refuted. 0 times theorem prover too weak. 60300 trivial. 0 not checked. [2018-10-01 00:02:09,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:09,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 5] total 107 [2018-10-01 00:02:09,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-01 00:02:09,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-01 00:02:09,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-01 00:02:09,172 INFO L87 Difference]: Start difference. First operand 926 states and 1032 transitions. Second operand 107 states. [2018-10-01 00:02:12,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:12,543 INFO L93 Difference]: Finished difference Result 33168 states and 43988 transitions. [2018-10-01 00:02:12,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-01 00:02:12,544 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 614 [2018-10-01 00:02:12,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:12,576 INFO L225 Difference]: With dead ends: 33168 [2018-10-01 00:02:12,576 INFO L226 Difference]: Without dead ends: 32549 [2018-10-01 00:02:12,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 613 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-01 00:02:12,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32549 states. [2018-10-01 00:02:13,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32549 to 32442. [2018-10-01 00:02:13,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32442 states. [2018-10-01 00:02:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32442 states to 32442 states and 32752 transitions. [2018-10-01 00:02:13,277 INFO L78 Accepts]: Start accepts. Automaton has 32442 states and 32752 transitions. Word has length 614 [2018-10-01 00:02:13,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:13,277 INFO L480 AbstractCegarLoop]: Abstraction has 32442 states and 32752 transitions. [2018-10-01 00:02:13,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-01 00:02:13,278 INFO L276 IsEmpty]: Start isEmpty. Operand 32442 states and 32752 transitions. [2018-10-01 00:02:13,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2018-10-01 00:02:13,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:13,304 INFO L375 BasicCegarLoop]: trace histogram [204, 203, 203, 1, 1, 1, 1] [2018-10-01 00:02:13,304 INFO L423 AbstractCegarLoop]: === Iteration 175 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:13,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:13,305 INFO L82 PathProgramCache]: Analyzing trace with hash 217122963, now seen corresponding path program 7 times [2018-10-01 00:02:13,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:13,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:13,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:13,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:13,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 62322 backedges. 31295 proven. 16276 refuted. 0 times theorem prover too weak. 14751 trivial. 0 not checked. [2018-10-01 00:02:18,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:18,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:18,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:18,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 62322 backedges. 31295 proven. 16276 refuted. 0 times theorem prover too weak. 14751 trivial. 0 not checked. [2018-10-01 00:02:19,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:19,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-01 00:02:19,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-01 00:02:19,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-01 00:02:19,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-01 00:02:19,352 INFO L87 Difference]: Start difference. First operand 32442 states and 32752 transitions. Second operand 107 states. [2018-10-01 00:02:20,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:20,464 INFO L93 Difference]: Finished difference Result 64589 states and 65210 transitions. [2018-10-01 00:02:20,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-01 00:02:20,465 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 614 [2018-10-01 00:02:20,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:20,496 INFO L225 Difference]: With dead ends: 64589 [2018-10-01 00:02:20,496 INFO L226 Difference]: Without dead ends: 32452 [2018-10-01 00:02:20,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 614 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-01 00:02:20,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32452 states. [2018-10-01 00:02:21,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32452 to 32445. [2018-10-01 00:02:21,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32445 states. [2018-10-01 00:02:21,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32445 states to 32445 states and 32755 transitions. [2018-10-01 00:02:21,190 INFO L78 Accepts]: Start accepts. Automaton has 32445 states and 32755 transitions. Word has length 614 [2018-10-01 00:02:21,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:21,190 INFO L480 AbstractCegarLoop]: Abstraction has 32445 states and 32755 transitions. [2018-10-01 00:02:21,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-01 00:02:21,190 INFO L276 IsEmpty]: Start isEmpty. Operand 32445 states and 32755 transitions. [2018-10-01 00:02:21,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2018-10-01 00:02:21,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:21,219 INFO L375 BasicCegarLoop]: trace histogram [205, 204, 204, 1, 1, 1, 1] [2018-10-01 00:02:21,219 INFO L423 AbstractCegarLoop]: === Iteration 176 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:21,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:21,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1985377589, now seen corresponding path program 8 times [2018-10-01 00:02:21,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:21,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:21,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:21,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:21,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 62935 backedges. 31605 proven. 16380 refuted. 0 times theorem prover too weak. 14950 trivial. 0 not checked. [2018-10-01 00:02:26,100 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:26,100 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-01 00:02:26,114 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:26,297 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:02:26,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:26,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 62935 backedges. 31605 proven. 16380 refuted. 0 times theorem prover too weak. 14950 trivial. 0 not checked. [2018-10-01 00:02:26,559 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:26,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-01 00:02:26,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-01 00:02:26,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-01 00:02:26,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-01 00:02:26,561 INFO L87 Difference]: Start difference. First operand 32445 states and 32755 transitions. Second operand 107 states. [2018-10-01 00:02:27,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:27,573 INFO L93 Difference]: Finished difference Result 64590 states and 65211 transitions. [2018-10-01 00:02:27,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-01 00:02:27,573 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 617 [2018-10-01 00:02:27,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:27,601 INFO L225 Difference]: With dead ends: 64590 [2018-10-01 00:02:27,602 INFO L226 Difference]: Without dead ends: 32453 [2018-10-01 00:02:27,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 722 GetRequests, 617 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-01 00:02:27,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32453 states. [2018-10-01 00:02:28,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32453 to 32445. [2018-10-01 00:02:28,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32445 states. [2018-10-01 00:02:28,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32445 states to 32445 states and 32755 transitions. [2018-10-01 00:02:28,183 INFO L78 Accepts]: Start accepts. Automaton has 32445 states and 32755 transitions. Word has length 617 [2018-10-01 00:02:28,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:28,184 INFO L480 AbstractCegarLoop]: Abstraction has 32445 states and 32755 transitions. [2018-10-01 00:02:28,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-01 00:02:28,184 INFO L276 IsEmpty]: Start isEmpty. Operand 32445 states and 32755 transitions. [2018-10-01 00:02:28,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2018-10-01 00:02:28,206 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:28,206 INFO L375 BasicCegarLoop]: trace histogram [205, 204, 204, 1, 1, 1, 1] [2018-10-01 00:02:28,206 INFO L423 AbstractCegarLoop]: === Iteration 177 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:28,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:28,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1827031175, now seen corresponding path program 9 times [2018-10-01 00:02:28,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:28,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:28,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:28,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:28,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 62935 backedges. 31594 proven. 16590 refuted. 0 times theorem prover too weak. 14751 trivial. 0 not checked. [2018-10-01 00:02:33,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:33,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:33,206 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:02:33,707 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 152 check-sat command(s) [2018-10-01 00:02:33,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:33,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 62935 backedges. 31903 proven. 14652 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2018-10-01 00:02:43,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:43,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 102] total 209 [2018-10-01 00:02:43,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 209 states [2018-10-01 00:02:43,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 209 interpolants. [2018-10-01 00:02:43,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6080, Invalid=37392, Unknown=0, NotChecked=0, Total=43472 [2018-10-01 00:02:43,854 INFO L87 Difference]: Start difference. First operand 32445 states and 32755 transitions. Second operand 209 states. Received shutdown request... [2018-10-01 00:03:17,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2018-10-01 00:03:17,354 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-01 00:03:17,359 WARN L206 ceAbstractionStarter]: Timeout [2018-10-01 00:03:17,359 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.10 12:03:17 BoogieIcfgContainer [2018-10-01 00:03:17,360 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-01 00:03:17,360 INFO L168 Benchmark]: Toolchain (without parser) took 746491.43 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.1 GB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 47.7 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-10-01 00:03:17,362 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:03:17,362 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.50 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:03:17,363 INFO L168 Benchmark]: Boogie Preprocessor took 20.36 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:03:17,363 INFO L168 Benchmark]: RCFGBuilder took 354.25 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-01 00:03:17,363 INFO L168 Benchmark]: TraceAbstraction took 746070.72 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 26.6 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-10-01 00:03:17,365 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 0.21 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 39.50 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 20.36 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 354.25 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 746070.72 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 26.6 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 30]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 30). Cancelled while BasicCegarLoop was constructing difference of abstraction (32445states) and FLOYD_HOARE automaton (currently 237 states, 209 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 343 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 745.9s OverallTime, 177 OverallIterations, 205 TraceHistogramMax, 311.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1719 SDtfs, 5965 SDslu, 80271 SDs, 0 SdLazy, 71437 SolverSat, 2635 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 49.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43544 GetRequests, 28342 SyntacticMatches, 2 SemanticMatches, 15199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372091 ImplicationChecksByTransitivity, 620.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32445occurred in iteration=175, 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: 2.7s AutomataMinimizationTime, 176 MinimizatonAttempts, 129 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.2s SsaConstructionTime, 18.0s SatisfiabilityAnalysisTime, 399.7s InterpolantComputationTime, 60954 NumberOfCodeBlocks, 59467 NumberOfCodeBlocksAsserted, 4822 NumberOfCheckSat, 60603 ConstructedInterpolants, 0 QuantifiedInterpolants, 42867271 SizeOfPredicates, 0 NumberOfNonLiveVariables, 68031 ConjunctsInSsa, 9598 ConjunctsInUnsatCore, 351 InterpolantComputations, 4 PerfectInterpolantSequences, 627285/2564888 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEqualityWithBranches.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-01_00-03-17-376.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEqualityWithBranches.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-01_00-03-17-376.csv Completed graceful shutdown