java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:58:43,605 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:58:43,607 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:58:43,624 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:58:43,625 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:58:43,627 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:58:43,628 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:58:43,630 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:58:43,633 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:58:43,634 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:58:43,636 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 23:58:43,637 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 23:58:43,637 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 23:58:43,638 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 23:58:43,648 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 23:58:43,649 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 23:58:43,651 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 23:58:43,652 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 23:58:43,654 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 23:58:43,660 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 23:58:43,663 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 23:58:43,664 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 23:58:43,668 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-30 23:58:43,668 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-30 23:58:43,668 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-30 23:58:43,670 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-30 23:58:43,671 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-30 23:58:43,672 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-30 23:58:43,673 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-30 23:58:43,676 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-30 23:58:43,676 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-30 23:58:43,677 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-30 23:58:43,677 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-30 23:58:43,678 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-30 23:58:43,681 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-30 23:58:43,682 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-30 23:58:43,682 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 23:58:43,710 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:58:43,710 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:58:43,711 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:58:43,711 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:58:43,712 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:58:43,712 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:58:43,712 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:58:43,712 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:58:43,713 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:58:43,713 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:58:43,713 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:58:43,713 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:58:43,713 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:58:43,714 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:58:43,714 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:58:43,714 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:58:43,714 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:58:43,714 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:58:43,715 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:58:43,715 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:58:43,715 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:58:43,715 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:58:43,715 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:58:43,716 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:58:43,716 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:58:43,716 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:58:43,716 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:58:43,716 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:58:43,717 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:58:43,717 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:58:43,764 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:58:43,777 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:58:43,781 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:58:43,782 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:58:43,783 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:58:43,784 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg.bpl [2018-09-30 23:58:43,784 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg.bpl' [2018-09-30 23:58:43,830 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:58:43,834 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:58:43,835 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:58:43,835 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:58:43,835 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:58:43,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:58:43" (1/1) ... [2018-09-30 23:58:43,869 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:58:43" (1/1) ... [2018-09-30 23:58:43,874 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 23:58:43,874 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 23:58:43,874 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 23:58:43,877 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:58:43,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:58:43,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:58:43,878 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:58:43,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:58:43" (1/1) ... [2018-09-30 23:58:43,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:58:43" (1/1) ... [2018-09-30 23:58:43,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:58:43" (1/1) ... [2018-09-30 23:58:43,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:58:43" (1/1) ... [2018-09-30 23:58:43,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:58:43" (1/1) ... [2018-09-30 23:58:43,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:58:43" (1/1) ... [2018-09-30 23:58:43,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:58:43" (1/1) ... [2018-09-30 23:58:43,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:58:43,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:58:43,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:58:43,902 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:58:43,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:58:43" (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 23:58:43,978 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 23:58:43,979 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 23:58:43,979 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 23:58:44,206 INFO L345 CfgBuilder]: Using library mode [2018-09-30 23:58:44,206 INFO L202 PluginConnector]: Adding new model Luxembourg.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:58:44 BoogieIcfgContainer [2018-09-30 23:58:44,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:58:44,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:58:44,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:58:44,212 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:58:44,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:58:43" (1/2) ... [2018-09-30 23:58:44,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c6f7bd and model type Luxembourg.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:58:44, skipping insertion in model container [2018-09-30 23:58:44,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:58:44" (2/2) ... [2018-09-30 23:58:44,219 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg.bpl [2018-09-30 23:58:44,229 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:58:44,240 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:58:44,283 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:58:44,284 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:58:44,284 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:58:44,285 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:58:44,285 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:58:44,285 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:58:44,285 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:58:44,285 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:58:44,286 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:58:44,301 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 23:58:44,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 23:58:44,314 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:44,317 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 23:58:44,318 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:44,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:44,328 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-09-30 23:58:44,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:44,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:44,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:44,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:44,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:44,510 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 23:58:44,512 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:58:44,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 23:58:44,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:58:44,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:58:44,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:58:44,533 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 23:58:44,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:44,576 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-30 23:58:44,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:58:44,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 23:58:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:44,589 INFO L225 Difference]: With dead ends: 13 [2018-09-30 23:58:44,590 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 23:58:44,594 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 23:58:44,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 23:58:44,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 23:58:44,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 23:58:44,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 23:58:44,635 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 23:58:44,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:44,635 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 23:58:44,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:58:44,635 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 23:58:44,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 23:58:44,636 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:44,636 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 23:58:44,636 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:44,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:44,637 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-09-30 23:58:44,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:44,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:44,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:44,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:44,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:44,775 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 23:58:44,775 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:44,775 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 23:58:44,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:44,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:44,846 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 23:58:44,867 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:44,868 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 23:58:44,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:58:44,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:58:44,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:58:44,870 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-30 23:58:44,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:44,919 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-30 23:58:44,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:58:44,920 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-30 23:58:44,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:44,921 INFO L225 Difference]: With dead ends: 8 [2018-09-30 23:58:44,921 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 23:58:44,923 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 23:58:44,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 23:58:44,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 23:58:44,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 23:58:44,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 23:58:44,926 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 23:58:44,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:44,926 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 23:58:44,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:58:44,928 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 23:58:44,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 23:58:44,928 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:44,928 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 23:58:44,930 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:44,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:44,930 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-09-30 23:58:44,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:44,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:44,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:44,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:44,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:45,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:45,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:58:45,034 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:45,053 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:45,054 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:45,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:45,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:45,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 23:58:45,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:58:45,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:58:45,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:58:45,085 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-30 23:58:45,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:45,120 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 23:58:45,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:58:45,120 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-30 23:58:45,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:45,121 INFO L225 Difference]: With dead ends: 9 [2018-09-30 23:58:45,121 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 23:58:45,122 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 23:58:45,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 23:58:45,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 23:58:45,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 23:58:45,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 23:58:45,125 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 23:58:45,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:45,126 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 23:58:45,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:58:45,126 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 23:58:45,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 23:58:45,127 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:45,127 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-30 23:58:45,127 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:45,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:45,128 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-09-30 23:58:45,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:45,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:45,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:45,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:45,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:45,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:45,208 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:58:45,218 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:45,229 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 23:58:45,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:45,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:45,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:45,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:58:45,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:58:45,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:58:45,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:58:45,259 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-30 23:58:45,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:45,314 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 23:58:45,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:58:45,315 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-30 23:58:45,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:45,316 INFO L225 Difference]: With dead ends: 10 [2018-09-30 23:58:45,316 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 23:58:45,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:58:45,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 23:58:45,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 23:58:45,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 23:58:45,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 23:58:45,320 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 23:58:45,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:45,320 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 23:58:45,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:58:45,320 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 23:58:45,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 23:58:45,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:45,321 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-30 23:58:45,321 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:45,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:45,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-09-30 23:58:45,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:45,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:45,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:45,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:45,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:45,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:45,570 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:45,571 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 23:58:45,584 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:45,628 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:45,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:45,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:45,663 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:45,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:58:45,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:58:45,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:58:45,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:58:45,665 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-30 23:58:45,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:45,698 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 23:58:45,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:58:45,698 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-30 23:58:45,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:45,699 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:58:45,699 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 23:58:45,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:58:45,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 23:58:45,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 23:58:45,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 23:58:45,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 23:58:45,705 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 23:58:45,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:45,705 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 23:58:45,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:58:45,705 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 23:58:45,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:58:45,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:45,706 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-30 23:58:45,707 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:45,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:45,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-09-30 23:58:45,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:45,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:45,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:45,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:45,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:45,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:45,887 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 23:58:45,895 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:45,913 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 23:58:45,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:45,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:45,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:45,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:58:45,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:58:45,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:58:45,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:58:45,947 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-30 23:58:45,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:45,996 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 23:58:45,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:58:45,997 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-30 23:58:45,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:45,997 INFO L225 Difference]: With dead ends: 12 [2018-09-30 23:58:45,997 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 23:58:45,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 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 23:58:45,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 23:58:46,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 23:58:46,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 23:58:46,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 23:58:46,001 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 23:58:46,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:46,001 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 23:58:46,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:58:46,002 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 23:58:46,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 23:58:46,002 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:46,002 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-30 23:58:46,003 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:46,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:46,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-09-30 23:58:46,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:46,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:46,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:46,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:46,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:46,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:46,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:58:46,261 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:46,272 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 23:58:46,272 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:46,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:46,282 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:46,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:46,306 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:58:46,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:58:46,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:58:46,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:58:46,307 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-30 23:58:46,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:46,357 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 23:58:46,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:58:46,357 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-30 23:58:46,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:46,358 INFO L225 Difference]: With dead ends: 13 [2018-09-30 23:58:46,358 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 23:58:46,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:58:46,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 23:58:46,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 23:58:46,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 23:58:46,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 23:58:46,363 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 23:58:46,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:46,363 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 23:58:46,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:58:46,363 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 23:58:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:58:46,364 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:46,364 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-30 23:58:46,364 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:46,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:46,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-09-30 23:58:46,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:46,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:46,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:46,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:46,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:46,492 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:46,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:58:46,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:46,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:46,582 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:46,583 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:46,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:46,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:46,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:46,584 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-30 23:58:46,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:46,832 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 23:58:46,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:46,834 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-30 23:58:46,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:46,835 INFO L225 Difference]: With dead ends: 14 [2018-09-30 23:58:46,835 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 23:58:46,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:46,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 23:58:46,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 23:58:46,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 23:58:46,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 23:58:46,842 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 23:58:46,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:46,843 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 23:58:46,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:46,843 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 23:58:46,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:58:46,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:46,844 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-30 23:58:46,844 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:46,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:46,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-09-30 23:58:46,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:46,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:46,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:46,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:46,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:47,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:47,025 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 23:58:47,033 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:47,045 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:47,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:47,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:47,075 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:47,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:58:47,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:47,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:47,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:47,077 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-30 23:58:47,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:47,116 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 23:58:47,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:58:47,117 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-30 23:58:47,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:47,117 INFO L225 Difference]: With dead ends: 15 [2018-09-30 23:58:47,118 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 23:58:47,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 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 23:58:47,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 23:58:47,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 23:58:47,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 23:58:47,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 23:58:47,122 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-30 23:58:47,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:47,122 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 23:58:47,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:58:47,122 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 23:58:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 23:58:47,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:47,123 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-30 23:58:47,123 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:47,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:47,124 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-09-30 23:58:47,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:47,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:47,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:47,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:47,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:47,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:47,260 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 23:58:47,269 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:47,285 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 23:58:47,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:47,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:47,296 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:47,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:47,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 23:58:47,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:58:47,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:58:47,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:58:47,322 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-30 23:58:47,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:47,381 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 23:58:47,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:58:47,381 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-30 23:58:47,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:47,382 INFO L225 Difference]: With dead ends: 16 [2018-09-30 23:58:47,382 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 23:58:47,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 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 23:58:47,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 23:58:47,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 23:58:47,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 23:58:47,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 23:58:47,386 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-30 23:58:47,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:47,386 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 23:58:47,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:58:47,386 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 23:58:47,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:58:47,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:47,387 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-30 23:58:47,387 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:47,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:47,388 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-09-30 23:58:47,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:47,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:47,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:47,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:47,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:47,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:47,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:58:47,606 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:47,618 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:47,619 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:47,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:47,659 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:47,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 23:58:47,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:58:47,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:58:47,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:58:47,661 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-30 23:58:47,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:47,715 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 23:58:47,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:58:47,715 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-30 23:58:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:47,716 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:58:47,717 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 23:58:47,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:58:47,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 23:58:47,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 23:58:47,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 23:58:47,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 23:58:47,722 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-30 23:58:47,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:47,722 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 23:58:47,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:58:47,723 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 23:58:47,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:58:47,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:47,723 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-30 23:58:47,723 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:47,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:47,724 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-09-30 23:58:47,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:47,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:47,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:47,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:47,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:48,009 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:48,010 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:48,010 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 23:58:48,021 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:48,034 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:58:48,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:48,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:48,076 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:48,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 23:58:48,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:58:48,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:58:48,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:58:48,078 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-30 23:58:48,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:48,225 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 23:58:48,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:58:48,225 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 23:58:48,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:48,226 INFO L225 Difference]: With dead ends: 18 [2018-09-30 23:58:48,226 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 23:58:48,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:58:48,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 23:58:48,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 23:58:48,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 23:58:48,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 23:58:48,230 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-30 23:58:48,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:48,230 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 23:58:48,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:58:48,231 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 23:58:48,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:58:48,231 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:48,231 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-30 23:58:48,232 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:48,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:48,232 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-09-30 23:58:48,232 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:48,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:48,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:48,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:48,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:48,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:48,409 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 23:58:48,418 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:48,432 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:58:48,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:48,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:48,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:48,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 23:58:48,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:58:48,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:58:48,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:58:48,466 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-30 23:58:48,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:48,501 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 23:58:48,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:58:48,502 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-30 23:58:48,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:48,503 INFO L225 Difference]: With dead ends: 19 [2018-09-30 23:58:48,503 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 23:58:48,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 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 23:58:48,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 23:58:48,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 23:58:48,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 23:58:48,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 23:58:48,508 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-30 23:58:48,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:48,508 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 23:58:48,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:58:48,508 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 23:58:48,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 23:58:48,509 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:48,509 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-30 23:58:48,509 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:48,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:48,509 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-09-30 23:58:48,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:48,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:48,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:48,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:48,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:48,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:48,747 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:48,747 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:58:48,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:48,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:48,801 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:48,801 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 23:58:48,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:58:48,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:58:48,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:58:48,803 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-30 23:58:49,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:49,090 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 23:58:49,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:58:49,091 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-30 23:58:49,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:49,092 INFO L225 Difference]: With dead ends: 20 [2018-09-30 23:58:49,092 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 23:58:49,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 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 23:58:49,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 23:58:49,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 23:58:49,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 23:58:49,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 23:58:49,096 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-30 23:58:49,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:49,096 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 23:58:49,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:58:49,096 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 23:58:49,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:49,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:49,097 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-30 23:58:49,097 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:49,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:49,098 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-09-30 23:58:49,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:49,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:49,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:49,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:49,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:49,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:49,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:49,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:58:49,421 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:49,438 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:49,438 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:49,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:49,451 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:49,473 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:49,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 23:58:49,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:58:49,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:58:49,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:58:49,474 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-30 23:58:49,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:49,806 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 23:58:49,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:58:49,806 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-30 23:58:49,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:49,807 INFO L225 Difference]: With dead ends: 21 [2018-09-30 23:58:49,807 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 23:58:49,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 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 23:58:49,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 23:58:49,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 23:58:49,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 23:58:49,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 23:58:49,811 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-30 23:58:49,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:49,812 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 23:58:49,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:58:49,812 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 23:58:49,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:58:49,813 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:49,813 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-30 23:58:49,813 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:49,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:49,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-09-30 23:58:49,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:49,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:49,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:49,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:49,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:49,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:50,112 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:50,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:50,112 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 23:58:50,121 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:50,135 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 23:58:50,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:50,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:50,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:50,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 23:58:50,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:58:50,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:58:50,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:58:50,170 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-30 23:58:50,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:50,208 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 23:58:50,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:58:50,212 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-30 23:58:50,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:50,213 INFO L225 Difference]: With dead ends: 22 [2018-09-30 23:58:50,213 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 23:58:50,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:58:50,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 23:58:50,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 23:58:50,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:58:50,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 23:58:50,216 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-30 23:58:50,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:50,216 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 23:58:50,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:58:50,217 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 23:58:50,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:50,217 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:50,217 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-30 23:58:50,217 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:50,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:50,218 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times [2018-09-30 23:58:50,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:50,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:50,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:50,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:50,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:50,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:50,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:58:50,789 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:50,822 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:50,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:50,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:50,838 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:50,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:50,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 23:58:50,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:58:50,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:58:50,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:58:50,871 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-30 23:58:50,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:50,959 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 23:58:50,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:58:50,960 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-30 23:58:50,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:50,960 INFO L225 Difference]: With dead ends: 23 [2018-09-30 23:58:50,960 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 23:58:50,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:58:50,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 23:58:50,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 23:58:50,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 23:58:50,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 23:58:50,965 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-30 23:58:50,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:50,965 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 23:58:50,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:58:50,965 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 23:58:50,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:58:50,966 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:50,966 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-30 23:58:50,966 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:50,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:50,966 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times [2018-09-30 23:58:50,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:50,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:50,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:50,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:50,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:51,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:51,655 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 23:58:51,662 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:51,683 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 23:58:51,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:51,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:51,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:51,723 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 23:58:51,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:58:51,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:58:51,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:58:51,724 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-30 23:58:51,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:51,823 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 23:58:51,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:58:51,824 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-30 23:58:51,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:51,824 INFO L225 Difference]: With dead ends: 24 [2018-09-30 23:58:51,824 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 23:58:51,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:58:51,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 23:58:51,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 23:58:51,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:58:51,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 23:58:51,829 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-30 23:58:51,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:51,829 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 23:58:51,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:58:51,829 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 23:58:51,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:58:51,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:51,830 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-30 23:58:51,830 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:51,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:51,831 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times [2018-09-30 23:58:51,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:51,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:51,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:51,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:51,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:52,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:52,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:58:52,076 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:52,107 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 23:58:52,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:52,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:52,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:52,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 23:58:52,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:58:52,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:58:52,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:58:52,143 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-30 23:58:52,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:52,188 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 23:58:52,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:58:52,188 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-30 23:58:52,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:52,189 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:58:52,189 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:58:52,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:58:52,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:58:52,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 23:58:52,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 23:58:52,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 23:58:52,193 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-30 23:58:52,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:52,194 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 23:58:52,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:58:52,194 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 23:58:52,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:58:52,194 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:52,195 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-30 23:58:52,195 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:52,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:52,195 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times [2018-09-30 23:58:52,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:52,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:52,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:52,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:52,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:52,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:52,517 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:58:52,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:52,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:52,594 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:52,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 23:58:52,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:58:52,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:58:52,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:58:52,596 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-30 23:58:52,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:52,650 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 23:58:52,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:58:52,650 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-30 23:58:52,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:52,651 INFO L225 Difference]: With dead ends: 26 [2018-09-30 23:58:52,652 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 23:58:52,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:58:52,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 23:58:52,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 23:58:52,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:58:52,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 23:58:52,656 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-30 23:58:52,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:52,656 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 23:58:52,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:58:52,656 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 23:58:52,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 23:58:52,657 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:52,657 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-30 23:58:52,657 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:52,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:52,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times [2018-09-30 23:58:52,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:52,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:52,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:52,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:52,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:52,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:52,957 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 23:58:52,957 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:52,957 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) [2018-09-30 23:58:52,973 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:52,995 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:52,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:52,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:53,008 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 23:58:53,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:53,039 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 23:58:53,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:58:53,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:58:53,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:58:53,040 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-30 23:58:53,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:53,138 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 23:58:53,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:58:53,139 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-30 23:58:53,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:53,140 INFO L225 Difference]: With dead ends: 27 [2018-09-30 23:58:53,140 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 23:58:53,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 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 23:58:53,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 23:58:53,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 23:58:53,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 23:58:53,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 23:58:53,145 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-30 23:58:53,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:53,145 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 23:58:53,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:58:53,145 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 23:58:53,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 23:58:53,146 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:53,146 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-30 23:58:53,147 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:53,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:53,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times [2018-09-30 23:58:53,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:53,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:53,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:53,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:53,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:53,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:53,482 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 23:58:53,490 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:53,510 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 23:58:53,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:53,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:53,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:53,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 23:58:53,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:58:53,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:58:53,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:58:53,547 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-30 23:58:53,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:53,607 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 23:58:53,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:58:53,609 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-30 23:58:53,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:53,610 INFO L225 Difference]: With dead ends: 28 [2018-09-30 23:58:53,610 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 23:58:53,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:58:53,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 23:58:53,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 23:58:53,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:58:53,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 23:58:53,613 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-30 23:58:53,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:53,614 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 23:58:53,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:58:53,614 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 23:58:53,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 23:58:53,615 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:53,615 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-30 23:58:53,615 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:53,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:53,615 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times [2018-09-30 23:58:53,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:53,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:53,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:53,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:53,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:53,924 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:53,924 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:53,924 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 23:58:53,933 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:53,949 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:53,950 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:53,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:53,988 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:53,988 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 23:58:53,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 23:58:53,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 23:58:53,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:58:53,989 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-30 23:58:54,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:54,049 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 23:58:54,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:58:54,050 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-30 23:58:54,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:54,050 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:58:54,050 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:58:54,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:58:54,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:58:54,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 23:58:54,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 23:58:54,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 23:58:54,055 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-30 23:58:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:54,055 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 23:58:54,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 23:58:54,055 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 23:58:54,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:58:54,056 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:54,056 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-30 23:58:54,056 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:54,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:54,056 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times [2018-09-30 23:58:54,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:54,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:54,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:54,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:54,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:54,596 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:54,596 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:54,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:58:54,611 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:54,634 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 23:58:54,634 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:54,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:54,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:54,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 23:58:54,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:58:54,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:58:54,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:58:54,681 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-30 23:58:54,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:54,805 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 23:58:54,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:58:54,805 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-30 23:58:54,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:54,805 INFO L225 Difference]: With dead ends: 30 [2018-09-30 23:58:54,805 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 23:58:54,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:58:54,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 23:58:54,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 23:58:54,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:58:54,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 23:58:54,810 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-30 23:58:54,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:54,811 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 23:58:54,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:58:54,811 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 23:58:54,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 23:58:54,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:54,812 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-30 23:58:54,812 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:54,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:54,812 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times [2018-09-30 23:58:54,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:54,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:54,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:54,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:54,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:55,405 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:55,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:55,412 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:55,429 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 23:58:55,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:55,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:55,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:55,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 23:58:55,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 23:58:55,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 23:58:55,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:58:55,472 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-30 23:58:55,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:55,558 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 23:58:55,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:58:55,559 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-30 23:58:55,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:55,559 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:58:55,559 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:58:55,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:58:55,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:58:55,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 23:58:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 23:58:55,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 23:58:55,563 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-30 23:58:55,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:55,563 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 23:58:55,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 23:58:55,564 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 23:58:55,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 23:58:55,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:55,564 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-30 23:58:55,565 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:55,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:55,565 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times [2018-09-30 23:58:55,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:55,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:55,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:55,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:55,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:56,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:56,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:58:56,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:56,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:56,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:56,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 23:58:56,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:58:56,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:58:56,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:58:56,073 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-30 23:58:56,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:56,117 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 23:58:56,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 23:58:56,118 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-30 23:58:56,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:56,118 INFO L225 Difference]: With dead ends: 32 [2018-09-30 23:58:56,119 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 23:58:56,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:58:56,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 23:58:56,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 23:58:56,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:58:56,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 23:58:56,123 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-30 23:58:56,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:56,123 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 23:58:56,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:58:56,123 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 23:58:56,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 23:58:56,124 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:56,124 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-30 23:58:56,124 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:56,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:56,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times [2018-09-30 23:58:56,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:56,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:56,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:56,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:56,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:57,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:57,197 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 23:58:57,205 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:57,221 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:57,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:57,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:57,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:57,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 23:58:57,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:58:57,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:58:57,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:58:57,259 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-30 23:58:57,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:57,461 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 23:58:57,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:58:57,462 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-30 23:58:57,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:57,462 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:58:57,463 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:58:57,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:58:57,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:58:57,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 23:58:57,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 23:58:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 23:58:57,467 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-30 23:58:57,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:57,468 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 23:58:57,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:58:57,468 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 23:58:57,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 23:58:57,468 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:57,469 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-30 23:58:57,469 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:57,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:57,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times [2018-09-30 23:58:57,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:57,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:57,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:57,470 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:57,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:58,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:58,694 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 23:58:58,702 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:58,725 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 23:58:58,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:58,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:58,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:58,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 23:58:58,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:58:58,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:58:58,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:58:58,769 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-30 23:58:58,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:58,801 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 23:58:58,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 23:58:58,802 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-30 23:58:58,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:58,802 INFO L225 Difference]: With dead ends: 34 [2018-09-30 23:58:58,802 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 23:58:58,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:58:58,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 23:58:58,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 23:58:58,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:58,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 23:58:58,806 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-30 23:58:58,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:58,806 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 23:58:58,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:58:58,806 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 23:58:58,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 23:58:58,807 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:58,807 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-30 23:58:58,807 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:58,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:58,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times [2018-09-30 23:58:58,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:58,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:58,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:58,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:58,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:59,206 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:59,206 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 23:58:59,220 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:59,257 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:59,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:59,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:59,293 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:59,293 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 23:58:59,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 23:58:59,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 23:58:59,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:58:59,294 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-30 23:58:59,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:59,357 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 23:58:59,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:58:59,358 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-30 23:58:59,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:59,358 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:58:59,358 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:58:59,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 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 23:58:59,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:58:59,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 23:58:59,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 23:58:59,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 23:58:59,363 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-30 23:58:59,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:59,363 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 23:58:59,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 23:58:59,363 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 23:58:59,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 23:58:59,367 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:59,367 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-30 23:58:59,367 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:59,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:59,367 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times [2018-09-30 23:58:59,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:59,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:59,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:59,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:59,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:59,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:59,830 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 23:58:59,839 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:59,865 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 23:58:59,865 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:59,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:59,880 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:59,901 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:59,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 23:58:59,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:58:59,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:58:59,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:58:59,903 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-30 23:59:00,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:00,102 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 23:59:00,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:59:00,103 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-30 23:59:00,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:00,103 INFO L225 Difference]: With dead ends: 36 [2018-09-30 23:59:00,104 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 23:59:00,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 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 23:59:00,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 23:59:00,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 23:59:00,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:00,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 23:59:00,108 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-30 23:59:00,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:00,108 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 23:59:00,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:59:00,108 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 23:59:00,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 23:59:00,109 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:00,109 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-30 23:59:00,109 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:00,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:00,109 INFO L82 PathProgramCache]: Analyzing trace with hash -410989408, now seen corresponding path program 30 times [2018-09-30 23:59:00,110 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:00,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:00,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:00,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:00,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:00,735 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:00,735 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:00,750 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:00,830 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 23:59:00,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:00,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:00,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:00,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 23:59:00,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 23:59:00,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 23:59:00,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:59:00,875 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-30 23:59:00,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:00,961 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 23:59:00,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 23:59:00,962 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-30 23:59:00,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:00,962 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:59:00,963 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:59:00,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:59:00,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:59:00,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 23:59:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 23:59:00,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 23:59:00,966 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-30 23:59:00,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:00,966 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 23:59:00,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 23:59:00,967 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 23:59:00,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 23:59:00,967 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:00,967 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-30 23:59:00,967 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:00,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:00,968 INFO L82 PathProgramCache]: Analyzing trace with hash 144226374, now seen corresponding path program 31 times [2018-09-30 23:59:00,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:00,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:00,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:00,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:00,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:01,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:01,816 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 23:59:01,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:01,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:01,882 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:01,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 23:59:01,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:59:01,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:59:01,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:59:01,884 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-30 23:59:01,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:01,963 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 23:59:01,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:59:01,963 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-30 23:59:01,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:01,964 INFO L225 Difference]: With dead ends: 38 [2018-09-30 23:59:01,964 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 23:59:01,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:59:01,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 23:59:01,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 23:59:01,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 23:59:01,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 23:59:01,968 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-30 23:59:01,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:01,968 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 23:59:01,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:59:01,968 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 23:59:01,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 23:59:01,969 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:01,969 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-30 23:59:01,969 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:01,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:01,969 INFO L82 PathProgramCache]: Analyzing trace with hash 176046432, now seen corresponding path program 32 times [2018-09-30 23:59:01,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:01,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:01,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:01,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:01,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:02,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:02,887 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 23:59:02,896 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:02,917 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:02,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:02,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:02,949 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:02,950 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 23:59:02,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 23:59:02,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 23:59:02,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:59:02,951 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-30 23:59:03,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:03,013 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 23:59:03,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:59:03,013 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-30 23:59:03,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:03,014 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:59:03,014 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:59:03,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:59:03,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:59:03,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 23:59:03,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 23:59:03,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 23:59:03,018 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-30 23:59:03,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:03,018 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 23:59:03,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 23:59:03,019 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 23:59:03,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 23:59:03,019 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:03,019 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-30 23:59:03,019 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:03,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:03,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468230, now seen corresponding path program 33 times [2018-09-30 23:59:03,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:03,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:03,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:03,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:03,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:04,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:04,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:04,036 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:04,064 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 23:59:04,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:04,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:04,106 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:04,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 23:59:04,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:59:04,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:59:04,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:59:04,107 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-30 23:59:04,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:04,266 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-30 23:59:04,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:59:04,267 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-30 23:59:04,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:04,267 INFO L225 Difference]: With dead ends: 40 [2018-09-30 23:59:04,267 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 23:59:04,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:59:04,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 23:59:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 23:59:04,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 23:59:04,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 23:59:04,271 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-30 23:59:04,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:04,271 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 23:59:04,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:59:04,271 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 23:59:04,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 23:59:04,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:04,271 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-30 23:59:04,272 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:04,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:04,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772896, now seen corresponding path program 34 times [2018-09-30 23:59:04,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:04,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:04,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:04,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:04,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:04,813 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:04,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:04,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:04,822 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:04,845 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:04,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:04,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:04,853 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:04,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:04,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 23:59:04,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 23:59:04,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 23:59:04,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:59:04,875 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-30 23:59:04,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:04,964 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 23:59:04,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:59:04,965 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-30 23:59:04,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:04,966 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:59:04,966 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:59:04,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:59:04,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:59:04,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 23:59:04,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 23:59:04,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 23:59:04,970 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-30 23:59:04,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:04,970 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 23:59:04,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 23:59:04,971 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 23:59:04,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 23:59:04,971 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:04,971 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-30 23:59:04,971 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:04,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:04,972 INFO L82 PathProgramCache]: Analyzing trace with hash 440348358, now seen corresponding path program 35 times [2018-09-30 23:59:04,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:04,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:04,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:04,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:04,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:05,546 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:05,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:05,554 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:05,582 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 23:59:05,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:05,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:05,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:05,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 23:59:05,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:59:05,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:59:05,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:59:05,618 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-30 23:59:05,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:05,694 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-30 23:59:05,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 23:59:05,695 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-30 23:59:05,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:05,696 INFO L225 Difference]: With dead ends: 42 [2018-09-30 23:59:05,696 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 23:59:05,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:59:05,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 23:59:05,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 23:59:05,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 23:59:05,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 23:59:05,700 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-30 23:59:05,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:05,700 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 23:59:05,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:59:05,700 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 23:59:05,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 23:59:05,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:05,701 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-30 23:59:05,701 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:05,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:05,701 INFO L82 PathProgramCache]: Analyzing trace with hash 765893344, now seen corresponding path program 36 times [2018-09-30 23:59:05,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:05,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:05,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:05,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:05,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:06,388 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:06,388 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:06,388 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:06,397 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:06,426 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 23:59:06,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:06,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:06,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:06,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 23:59:06,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 23:59:06,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 23:59:06,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:59:06,459 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-30 23:59:06,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:06,547 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 23:59:06,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:59:06,547 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-30 23:59:06,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:06,547 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:59:06,548 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:59:06,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 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 23:59:06,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:59:06,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 23:59:06,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 23:59:06,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 23:59:06,550 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-30 23:59:06,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:06,550 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 23:59:06,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 23:59:06,550 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 23:59:06,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 23:59:06,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:06,551 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-30 23:59:06,551 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:06,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:06,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2027113978, now seen corresponding path program 37 times [2018-09-30 23:59:06,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:06,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:06,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:06,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:06,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:07,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:07,367 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:07,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:07,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:07,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:07,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 23:59:07,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 23:59:07,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 23:59:07,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:59:07,445 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-30 23:59:07,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:07,530 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-30 23:59:07,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 23:59:07,531 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-30 23:59:07,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:07,531 INFO L225 Difference]: With dead ends: 44 [2018-09-30 23:59:07,531 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 23:59:07,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:59:07,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 23:59:07,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 23:59:07,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 23:59:07,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 23:59:07,534 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-30 23:59:07,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:07,535 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 23:59:07,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 23:59:07,535 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 23:59:07,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 23:59:07,535 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:07,535 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-30 23:59:07,535 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:07,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:07,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972256, now seen corresponding path program 38 times [2018-09-30 23:59:07,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:07,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:07,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:07,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:07,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:08,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:08,199 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 23:59:08,206 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:08,228 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:08,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:08,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:08,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:08,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 23:59:08,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 23:59:08,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 23:59:08,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:59:08,271 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-30 23:59:08,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:08,442 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 23:59:08,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:59:08,442 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-30 23:59:08,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:08,443 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:59:08,443 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:59:08,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:59:08,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:59:08,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 23:59:08,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 23:59:08,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 23:59:08,446 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-30 23:59:08,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:08,447 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 23:59:08,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 23:59:08,447 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 23:59:08,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:59:08,448 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:08,448 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-30 23:59:08,448 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:08,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:08,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495814, now seen corresponding path program 39 times [2018-09-30 23:59:08,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:08,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:08,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:08,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:08,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:09,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:09,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:09,092 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:09,124 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 23:59:09,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:09,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:09,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:09,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 23:59:09,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:59:09,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:59:09,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:59:09,159 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-30 23:59:09,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:09,222 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-30 23:59:09,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 23:59:09,223 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-30 23:59:09,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:09,224 INFO L225 Difference]: With dead ends: 46 [2018-09-30 23:59:09,224 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 23:59:09,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:59:09,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 23:59:09,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 23:59:09,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 23:59:09,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 23:59:09,226 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-30 23:59:09,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:09,227 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 23:59:09,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:59:09,227 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 23:59:09,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 23:59:09,227 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:09,227 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-30 23:59:09,227 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:09,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:09,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791520, now seen corresponding path program 40 times [2018-09-30 23:59:09,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:09,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:09,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:09,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:09,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:10,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:10,080 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 23:59:10,087 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:10,117 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:10,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:10,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:10,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:10,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 23:59:10,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 23:59:10,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 23:59:10,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:59:10,168 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-30 23:59:11,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:11,173 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 23:59:11,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:59:11,173 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-30 23:59:11,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:11,174 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:59:11,174 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:59:11,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:59:11,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:59:11,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 23:59:11,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 23:59:11,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 23:59:11,177 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-30 23:59:11,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:11,177 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 23:59:11,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 23:59:11,177 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 23:59:11,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 23:59:11,178 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:11,178 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-30 23:59:11,178 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:11,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:11,178 INFO L82 PathProgramCache]: Analyzing trace with hash -692041594, now seen corresponding path program 41 times [2018-09-30 23:59:11,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:11,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:11,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:11,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:11,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:12,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:12,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:12,345 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:12,380 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 23:59:12,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:12,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:12,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:12,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 23:59:12,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:59:12,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:59:12,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:59:12,415 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-30 23:59:12,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:12,490 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-30 23:59:12,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 23:59:12,490 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-30 23:59:12,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:12,491 INFO L225 Difference]: With dead ends: 48 [2018-09-30 23:59:12,491 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 23:59:12,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:59:12,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 23:59:12,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 23:59:12,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 23:59:12,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 23:59:12,493 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-30 23:59:12,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:12,493 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 23:59:12,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:59:12,493 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 23:59:12,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 23:59:12,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:12,494 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-30 23:59:12,494 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:12,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:12,494 INFO L82 PathProgramCache]: Analyzing trace with hash 21543200, now seen corresponding path program 42 times [2018-09-30 23:59:12,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:12,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:12,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:12,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:12,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:13,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:13,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:13,276 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:13,310 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 23:59:13,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:13,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:13,345 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:13,345 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 23:59:13,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 23:59:13,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 23:59:13,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:59:13,346 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-30 23:59:13,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:13,416 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 23:59:13,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:59:13,416 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-30 23:59:13,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:13,417 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:59:13,417 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:59:13,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:59:13,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:59:13,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 23:59:13,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 23:59:13,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 23:59:13,421 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-30 23:59:13,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:13,422 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 23:59:13,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 23:59:13,422 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 23:59:13,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 23:59:13,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:13,422 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-30 23:59:13,422 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:13,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:13,423 INFO L82 PathProgramCache]: Analyzing trace with hash 667835334, now seen corresponding path program 43 times [2018-09-30 23:59:13,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:13,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:13,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:13,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:13,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:14,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:14,197 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 23:59:14,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:14,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:14,244 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:14,264 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:14,265 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 23:59:14,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:59:14,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:59:14,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:59:14,266 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-30 23:59:14,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:14,396 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-30 23:59:14,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 23:59:14,397 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-30 23:59:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:14,397 INFO L225 Difference]: With dead ends: 50 [2018-09-30 23:59:14,397 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 23:59:14,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 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 23:59:14,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 23:59:14,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 23:59:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 23:59:14,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 23:59:14,401 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-30 23:59:14,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:14,401 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 23:59:14,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:59:14,401 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 23:59:14,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 23:59:14,401 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:14,401 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-30 23:59:14,402 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:14,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:14,402 INFO L82 PathProgramCache]: Analyzing trace with hash -771944992, now seen corresponding path program 44 times [2018-09-30 23:59:14,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:14,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:14,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:14,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:14,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:15,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:15,225 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 23:59:15,233 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:15,261 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:15,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:15,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:15,296 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:15,296 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 23:59:15,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 23:59:15,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 23:59:15,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:59:15,297 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-30 23:59:15,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:15,378 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 23:59:15,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:59:15,379 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-30 23:59:15,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:15,380 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:59:15,380 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:59:15,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 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 23:59:15,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:59:15,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 23:59:15,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 23:59:15,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 23:59:15,384 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-30 23:59:15,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:15,384 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 23:59:15,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 23:59:15,385 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 23:59:15,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 23:59:15,385 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:15,385 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-30 23:59:15,386 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:15,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:15,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505158, now seen corresponding path program 45 times [2018-09-30 23:59:15,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:15,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:15,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:15,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:15,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:16,331 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:16,331 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:16,340 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:16,374 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 23:59:16,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:16,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:16,414 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:16,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 23:59:16,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:59:16,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:59:16,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:59:16,416 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-30 23:59:16,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:16,948 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-30 23:59:16,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:59:16,948 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-30 23:59:16,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:16,949 INFO L225 Difference]: With dead ends: 52 [2018-09-30 23:59:16,949 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 23:59:16,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 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 23:59:16,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 23:59:16,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 23:59:16,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 23:59:16,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 23:59:16,951 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-30 23:59:16,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:16,951 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 23:59:16,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:59:16,952 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 23:59:16,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 23:59:16,952 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:16,952 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-30 23:59:16,952 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:16,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:16,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081184, now seen corresponding path program 46 times [2018-09-30 23:59:16,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:16,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:16,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:16,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:16,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:17,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:17,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:17,982 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:18,012 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:18,012 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:18,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:18,056 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:18,056 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 23:59:18,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 23:59:18,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 23:59:18,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:59:18,057 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-30 23:59:18,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:18,144 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 23:59:18,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:59:18,144 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-30 23:59:18,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:18,145 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:59:18,145 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:59:18,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:59:18,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:59:18,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 23:59:18,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 23:59:18,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 23:59:18,148 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-30 23:59:18,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:18,148 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 23:59:18,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 23:59:18,148 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 23:59:18,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 23:59:18,148 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:18,148 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-30 23:59:18,148 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:18,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:18,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192826, now seen corresponding path program 47 times [2018-09-30 23:59:18,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:18,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:18,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:18,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:18,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:19,242 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:19,242 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 23:59:19,250 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:19,289 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 23:59:19,289 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:19,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:19,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:19,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 23:59:19,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:59:19,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:59:19,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:59:19,331 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-30 23:59:19,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:19,397 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-30 23:59:19,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 23:59:19,404 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-30 23:59:19,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:19,404 INFO L225 Difference]: With dead ends: 54 [2018-09-30 23:59:19,404 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 23:59:19,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:59:19,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 23:59:19,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 23:59:19,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 23:59:19,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 23:59:19,407 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-30 23:59:19,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:19,407 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 23:59:19,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:59:19,408 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 23:59:19,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 23:59:19,408 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:19,408 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-30 23:59:19,408 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:19,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:19,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593376, now seen corresponding path program 48 times [2018-09-30 23:59:19,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:19,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:19,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:19,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:19,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:20,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:20,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:20,368 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:20,405 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 23:59:20,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:20,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:20,451 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:20,451 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 23:59:20,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 23:59:20,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 23:59:20,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:59:20,452 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-30 23:59:20,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:20,529 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 23:59:20,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:59:20,530 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-30 23:59:20,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:20,531 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:59:20,531 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:59:20,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:59:20,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:59:20,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 23:59:20,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 23:59:20,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 23:59:20,537 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-30 23:59:20,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:20,537 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 23:59:20,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 23:59:20,537 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 23:59:20,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 23:59:20,538 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:20,538 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-30 23:59:20,538 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:20,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:20,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1250314874, now seen corresponding path program 49 times [2018-09-30 23:59:20,538 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:20,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:20,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:20,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:20,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:22,384 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:22,384 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:22,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:22,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:22,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:22,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 23:59:22,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 23:59:22,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 23:59:22,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:59:22,459 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-30 23:59:22,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:22,538 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-30 23:59:22,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 23:59:22,538 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-30 23:59:22,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:22,539 INFO L225 Difference]: With dead ends: 56 [2018-09-30 23:59:22,539 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 23:59:22,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:59:22,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 23:59:22,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 23:59:22,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 23:59:22,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 23:59:22,542 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-30 23:59:22,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:22,543 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 23:59:22,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 23:59:22,543 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 23:59:22,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 23:59:22,543 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:22,543 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-30 23:59:22,544 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:22,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:22,544 INFO L82 PathProgramCache]: Analyzing trace with hash -105059296, now seen corresponding path program 50 times [2018-09-30 23:59:22,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:22,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:22,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:22,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:22,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:23,555 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:23,555 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 23:59:23,564 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:23,603 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:23,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:23,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:23,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:23,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 23:59:23,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 23:59:23,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 23:59:23,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:59:23,650 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-30 23:59:23,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:23,770 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 23:59:23,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 23:59:23,771 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-30 23:59:23,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:23,772 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:59:23,772 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:59:23,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 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 23:59:23,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:59:23,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 23:59:23,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 23:59:23,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 23:59:23,776 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-30 23:59:23,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:23,776 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 23:59:23,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 23:59:23,776 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 23:59:23,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 23:59:23,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:23,777 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-30 23:59:23,777 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:23,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:23,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125254, now seen corresponding path program 51 times [2018-09-30 23:59:23,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:23,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:23,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:23,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:23,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:24,869 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:24,869 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 23:59:24,877 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:24,937 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 23:59:24,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:24,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:24,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:24,983 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 23:59:24,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 23:59:24,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 23:59:24,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:59:24,984 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-30 23:59:25,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:25,123 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-30 23:59:25,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 23:59:25,123 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-30 23:59:25,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:25,124 INFO L225 Difference]: With dead ends: 58 [2018-09-30 23:59:25,124 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 23:59:25,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 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 23:59:25,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 23:59:25,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 23:59:25,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 23:59:25,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 23:59:25,127 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-30 23:59:25,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:25,127 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 23:59:25,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 23:59:25,128 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 23:59:25,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 23:59:25,128 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:25,128 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-30 23:59:25,128 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:25,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:25,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107936, now seen corresponding path program 52 times [2018-09-30 23:59:25,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:25,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:25,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:25,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:25,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:26,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:26,349 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 23:59:26,356 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:26,388 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:26,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:26,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:26,431 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:26,432 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 23:59:26,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 23:59:26,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 23:59:26,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:59:26,433 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-30 23:59:26,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:26,681 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 23:59:26,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:59:26,681 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-30 23:59:26,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:26,682 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:59:26,682 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:59:26,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:59:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:59:26,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 23:59:26,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 23:59:26,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 23:59:26,688 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-30 23:59:26,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:26,688 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 23:59:26,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 23:59:26,689 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 23:59:26,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 23:59:26,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:26,689 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-30 23:59:26,689 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:26,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:26,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832710, now seen corresponding path program 53 times [2018-09-30 23:59:26,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:26,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:26,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:26,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:26,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:28,139 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:28,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:28,146 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:28,189 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 23:59:28,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:28,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:28,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:28,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 23:59:28,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 23:59:28,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 23:59:28,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:59:28,235 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-30 23:59:28,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:28,329 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-30 23:59:28,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:59:28,330 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-30 23:59:28,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:28,331 INFO L225 Difference]: With dead ends: 60 [2018-09-30 23:59:28,331 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 23:59:28,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:59:28,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 23:59:28,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 23:59:28,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 23:59:28,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 23:59:28,334 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-30 23:59:28,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:28,334 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 23:59:28,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 23:59:28,334 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 23:59:28,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 23:59:28,334 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:28,335 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-30 23:59:28,335 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:28,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:28,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895520, now seen corresponding path program 54 times [2018-09-30 23:59:28,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:28,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:28,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:28,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:28,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:29,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:29,476 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:29,476 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 23:59:29,484 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:29,528 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-30 23:59:29,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:29,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:29,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:29,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 23:59:29,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 23:59:29,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 23:59:29,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:59:29,561 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-30 23:59:29,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:29,695 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 23:59:29,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 23:59:29,696 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-30 23:59:29,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:29,696 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:59:29,697 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:59:29,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:59:29,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:59:29,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 23:59:29,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 23:59:29,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 23:59:29,700 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-30 23:59:29,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:29,701 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 23:59:29,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 23:59:29,701 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 23:59:29,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 23:59:29,701 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:29,701 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-30 23:59:29,702 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:29,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:29,702 INFO L82 PathProgramCache]: Analyzing trace with hash -836059322, now seen corresponding path program 55 times [2018-09-30 23:59:29,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:29,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:29,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:29,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:29,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:29,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:31,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:31,008 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:31,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:31,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:31,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:31,081 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:31,081 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 23:59:31,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 23:59:31,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 23:59:31,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:59:31,082 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-30 23:59:31,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:31,181 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-30 23:59:31,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 23:59:31,182 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-30 23:59:31,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:31,183 INFO L225 Difference]: With dead ends: 62 [2018-09-30 23:59:31,183 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 23:59:31,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:59:31,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 23:59:31,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 23:59:31,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 23:59:31,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 23:59:31,187 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-30 23:59:31,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:31,187 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 23:59:31,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 23:59:31,187 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 23:59:31,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 23:59:31,188 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:31,188 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-30 23:59:31,188 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:31,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:31,188 INFO L82 PathProgramCache]: Analyzing trace with hash -148039072, now seen corresponding path program 56 times [2018-09-30 23:59:31,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:31,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:31,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:31,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:31,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:32,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:32,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:32,785 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:32,815 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:32,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:32,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:32,847 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:32,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 23:59:32,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 23:59:32,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 23:59:32,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:59:32,849 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-30 23:59:32,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:32,942 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 23:59:32,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:59:32,943 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-30 23:59:32,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:32,943 INFO L225 Difference]: With dead ends: 63 [2018-09-30 23:59:32,944 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 23:59:32,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:59:32,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 23:59:32,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 23:59:32,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 23:59:32,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 23:59:32,947 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-30 23:59:32,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:32,947 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 23:59:32,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 23:59:32,948 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 23:59:32,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 23:59:32,948 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:32,948 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-30 23:59:32,948 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:32,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:32,949 INFO L82 PathProgramCache]: Analyzing trace with hash -294247802, now seen corresponding path program 57 times [2018-09-30 23:59:32,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:32,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:32,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:32,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:32,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:34,307 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:34,307 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:34,314 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:34,360 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 23:59:34,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:34,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:34,405 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:34,406 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 23:59:34,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 23:59:34,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 23:59:34,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:59:34,407 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-30 23:59:34,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:34,541 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-30 23:59:34,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 23:59:34,541 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-30 23:59:34,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:34,542 INFO L225 Difference]: With dead ends: 64 [2018-09-30 23:59:34,542 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 23:59:34,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:59:34,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 23:59:34,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 23:59:34,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 23:59:34,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 23:59:34,546 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-30 23:59:34,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:34,547 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 23:59:34,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 23:59:34,547 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 23:59:34,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 23:59:34,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:34,548 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-30 23:59:34,548 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:34,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:34,548 INFO L82 PathProgramCache]: Analyzing trace with hash -531751136, now seen corresponding path program 58 times [2018-09-30 23:59:34,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:34,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:34,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:34,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:34,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:36,276 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:36,276 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:36,287 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:36,324 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:36,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:36,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:36,365 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:36,366 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 23:59:36,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 23:59:36,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 23:59:36,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:59:36,367 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-30 23:59:36,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:36,447 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 23:59:36,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 23:59:36,447 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-30 23:59:36,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:36,448 INFO L225 Difference]: With dead ends: 65 [2018-09-30 23:59:36,448 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 23:59:36,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:59:36,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 23:59:36,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 23:59:36,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 23:59:36,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 23:59:36,451 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-30 23:59:36,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:36,452 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 23:59:36,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 23:59:36,452 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 23:59:36,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 23:59:36,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:36,452 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-30 23:59:36,452 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:36,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:36,453 INFO L82 PathProgramCache]: Analyzing trace with hash 695580102, now seen corresponding path program 59 times [2018-09-30 23:59:36,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:36,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:36,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:36,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:36,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:38,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:38,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:38,390 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:38,438 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 23:59:38,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:38,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:38,485 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:38,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 23:59:38,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 23:59:38,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 23:59:38,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:59:38,487 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-30 23:59:38,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:38,570 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-30 23:59:38,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 23:59:38,570 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-30 23:59:38,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:38,571 INFO L225 Difference]: With dead ends: 66 [2018-09-30 23:59:38,571 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 23:59:38,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:59:38,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 23:59:38,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 23:59:38,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 23:59:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 23:59:38,574 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-30 23:59:38,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:38,574 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 23:59:38,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 23:59:38,575 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 23:59:38,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 23:59:38,575 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:38,575 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-30 23:59:38,575 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:38,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:38,575 INFO L82 PathProgramCache]: Analyzing trace with hash 88142816, now seen corresponding path program 60 times [2018-09-30 23:59:38,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:38,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:38,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:38,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:38,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:40,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:40,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:40,642 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:40,698 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 23:59:40,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:40,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:40,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:40,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 23:59:40,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 23:59:40,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 23:59:40,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:59:40,743 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-30 23:59:40,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:40,863 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 23:59:40,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 23:59:40,864 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-30 23:59:40,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:40,864 INFO L225 Difference]: With dead ends: 67 [2018-09-30 23:59:40,864 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 23:59:40,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:59:40,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 23:59:40,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 23:59:40,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 23:59:40,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 23:59:40,868 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-30 23:59:40,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:40,868 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 23:59:40,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 23:59:40,868 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 23:59:40,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 23:59:40,869 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:40,869 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-30 23:59:40,869 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:40,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:40,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543866, now seen corresponding path program 61 times [2018-09-30 23:59:40,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:40,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:40,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:40,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:40,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:42,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:42,452 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:42,452 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:42,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:42,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:42,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:42,531 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 23:59:42,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 23:59:42,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 23:59:42,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:59:42,532 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-30 23:59:42,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:42,730 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-30 23:59:42,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 23:59:42,730 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-30 23:59:42,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:42,731 INFO L225 Difference]: With dead ends: 68 [2018-09-30 23:59:42,731 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 23:59:42,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:59:42,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 23:59:42,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 23:59:42,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 23:59:42,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 23:59:42,733 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-30 23:59:42,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:42,733 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 23:59:42,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 23:59:42,733 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 23:59:42,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 23:59:42,734 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:42,734 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-30 23:59:42,734 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:42,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:42,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223456, now seen corresponding path program 62 times [2018-09-30 23:59:42,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:42,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:42,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:42,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:42,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:45,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:45,125 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:45,125 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 23:59:45,133 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:45,170 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:45,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:45,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:45,214 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:45,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 23:59:45,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 23:59:45,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 23:59:45,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:59:45,215 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-30 23:59:45,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:45,370 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 23:59:45,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:59:45,378 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-30 23:59:45,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:45,378 INFO L225 Difference]: With dead ends: 69 [2018-09-30 23:59:45,378 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 23:59:45,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:59:45,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 23:59:45,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 23:59:45,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 23:59:45,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 23:59:45,381 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-30 23:59:45,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:45,381 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 23:59:45,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 23:59:45,382 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 23:59:45,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 23:59:45,382 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:45,382 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-30 23:59:45,382 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:45,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:45,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774662, now seen corresponding path program 63 times [2018-09-30 23:59:45,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:45,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:45,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:45,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:45,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:46,931 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:46,931 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 23:59:46,947 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:47,062 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-30 23:59:47,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:47,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:47,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:47,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 23:59:47,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 23:59:47,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 23:59:47,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:59:47,098 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-30 23:59:47,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:47,215 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-30 23:59:47,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 23:59:47,216 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-30 23:59:47,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:47,216 INFO L225 Difference]: With dead ends: 70 [2018-09-30 23:59:47,217 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 23:59:47,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 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 23:59:47,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 23:59:47,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 23:59:47,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 23:59:47,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 23:59:47,220 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-30 23:59:47,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:47,221 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 23:59:47,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 23:59:47,221 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 23:59:47,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 23:59:47,221 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:47,221 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-30 23:59:47,222 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:47,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:47,222 INFO L82 PathProgramCache]: Analyzing trace with hash -892596896, now seen corresponding path program 64 times [2018-09-30 23:59:47,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:47,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:47,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:47,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:47,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:49,741 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:49,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:49,750 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:49,790 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:49,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:49,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:49,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:49,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:49,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 23:59:49,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 23:59:49,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 23:59:49,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:59:49,836 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-30 23:59:50,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:50,133 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 23:59:50,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 23:59:50,133 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-30 23:59:50,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:50,134 INFO L225 Difference]: With dead ends: 71 [2018-09-30 23:59:50,134 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 23:59:50,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:59:50,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 23:59:50,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 23:59:50,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 23:59:50,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 23:59:50,138 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-30 23:59:50,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:50,138 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 23:59:50,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 23:59:50,138 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 23:59:50,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 23:59:50,139 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:50,139 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-30 23:59:50,139 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:50,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:50,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703866, now seen corresponding path program 65 times [2018-09-30 23:59:50,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:50,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:50,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:50,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:50,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:50,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:52,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:52,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:52,351 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:52,407 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 23:59:52,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:52,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:52,447 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:52,447 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 23:59:52,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 23:59:52,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 23:59:52,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:59:52,448 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-30 23:59:52,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:52,538 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-30 23:59:52,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 23:59:52,538 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-30 23:59:52,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:52,539 INFO L225 Difference]: With dead ends: 72 [2018-09-30 23:59:52,539 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 23:59:52,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:59:52,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 23:59:52,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 23:59:52,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 23:59:52,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 23:59:52,542 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-30 23:59:52,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:52,543 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 23:59:52,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 23:59:52,543 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 23:59:52,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 23:59:52,543 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:52,543 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-30 23:59:52,544 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:52,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:52,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718432, now seen corresponding path program 66 times [2018-09-30 23:59:52,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:52,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:52,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:52,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:52,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:54,444 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:54,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:54,453 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:54,503 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-30 23:59:54,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:54,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:54,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:54,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 23:59:54,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 23:59:54,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 23:59:54,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:59:54,556 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-30 23:59:56,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:56,171 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 23:59:56,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 23:59:56,172 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-30 23:59:56,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:56,172 INFO L225 Difference]: With dead ends: 73 [2018-09-30 23:59:56,172 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 23:59:56,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:59:56,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 23:59:56,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 23:59:56,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 23:59:56,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 23:59:56,175 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-30 23:59:56,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:56,176 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 23:59:56,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 23:59:56,176 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 23:59:56,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 23:59:56,176 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:56,176 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-30 23:59:56,177 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:56,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:56,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438138, now seen corresponding path program 67 times [2018-09-30 23:59:56,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:56,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:56,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:56,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:56,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:58,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:58,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:58,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:58,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:58,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:58,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 23:59:58,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 23:59:58,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 23:59:58,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:59:58,359 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-30 23:59:58,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:58,472 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-30 23:59:58,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 23:59:58,472 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-30 23:59:58,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:58,473 INFO L225 Difference]: With dead ends: 74 [2018-09-30 23:59:58,473 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 23:59:58,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:59:58,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 23:59:58,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 23:59:58,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 23:59:58,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 23:59:58,477 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-30 23:59:58,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:58,477 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 23:59:58,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 23:59:58,477 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 23:59:58,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 23:59:58,478 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:58,478 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-30 23:59:58,478 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:58,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:58,479 INFO L82 PathProgramCache]: Analyzing trace with hash 976119520, now seen corresponding path program 68 times [2018-09-30 23:59:58,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:58,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:58,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:58,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:58,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:00,153 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:00,153 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:00,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:00,200 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:00,200 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:00,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:00,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:00,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-01 00:00:00,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-01 00:00:00,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-01 00:00:00,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-01 00:00:00,236 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-10-01 00:00:00,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:00,331 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-01 00:00:00,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-01 00:00:00,331 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-10-01 00:00:00,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:00,332 INFO L225 Difference]: With dead ends: 75 [2018-10-01 00:00:00,332 INFO L226 Difference]: Without dead ends: 73 [2018-10-01 00:00:00,333 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-01 00:00:00,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-01 00:00:00,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-01 00:00:00,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-01 00:00:00,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-01 00:00:00,336 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-10-01 00:00:00,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:00,336 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-01 00:00:00,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-01 00:00:00,336 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-01 00:00:00,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-01 00:00:00,337 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:00,337 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-10-01 00:00:00,337 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:00,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:00,338 INFO L82 PathProgramCache]: Analyzing trace with hash 194930182, now seen corresponding path program 69 times [2018-10-01 00:00:00,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:00,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:00,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:00,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:00,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:02,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:02,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:02,178 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:00:02,255 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-01 00:00:02,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:02,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:02,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:02,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-01 00:00:02,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-01 00:00:02,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-01 00:00:02,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-01 00:00:02,305 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-10-01 00:00:02,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:02,689 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-01 00:00:02,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-01 00:00:02,690 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-10-01 00:00:02,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:02,691 INFO L225 Difference]: With dead ends: 76 [2018-10-01 00:00:02,691 INFO L226 Difference]: Without dead ends: 74 [2018-10-01 00:00:02,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-01 00:00:02,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-01 00:00:02,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-01 00:00:02,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-01 00:00:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-01 00:00:02,695 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-10-01 00:00:02,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:02,695 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-01 00:00:02,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-01 00:00:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-01 00:00:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-01 00:00:02,696 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:02,696 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-10-01 00:00:02,696 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:02,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:02,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864480, now seen corresponding path program 70 times [2018-10-01 00:00:02,696 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:02,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:02,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:02,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:02,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:02,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:05,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:05,287 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:05,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:05,295 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:00:05,334 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:05,335 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:05,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:05,375 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:05,376 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-01 00:00:05,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-01 00:00:05,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-01 00:00:05,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-01 00:00:05,377 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-10-01 00:00:05,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:05,564 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-01 00:00:05,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-01 00:00:05,564 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-10-01 00:00:05,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:05,565 INFO L225 Difference]: With dead ends: 77 [2018-10-01 00:00:05,565 INFO L226 Difference]: Without dead ends: 75 [2018-10-01 00:00:05,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-01 00:00:05,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-01 00:00:05,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-01 00:00:05,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-01 00:00:05,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-01 00:00:05,569 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-10-01 00:00:05,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:05,570 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-01 00:00:05,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-01 00:00:05,570 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-01 00:00:05,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-01 00:00:05,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:05,570 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-10-01 00:00:05,571 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:05,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:05,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779834, now seen corresponding path program 71 times [2018-10-01 00:00:05,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:05,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:05,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:05,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:05,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:07,480 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:07,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:07,487 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:00:07,546 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-01 00:00:07,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:07,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:07,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:07,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-01 00:00:07,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-01 00:00:07,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-01 00:00:07,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-01 00:00:07,598 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-10-01 00:00:07,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:07,745 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-01 00:00:07,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-01 00:00:07,746 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-10-01 00:00:07,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:07,747 INFO L225 Difference]: With dead ends: 78 [2018-10-01 00:00:07,747 INFO L226 Difference]: Without dead ends: 76 [2018-10-01 00:00:07,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-01 00:00:07,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-01 00:00:07,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-01 00:00:07,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-01 00:00:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-01 00:00:07,750 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-10-01 00:00:07,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:07,751 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-01 00:00:07,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-01 00:00:07,751 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-01 00:00:07,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-01 00:00:07,751 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:07,752 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-10-01 00:00:07,752 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:07,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:07,752 INFO L82 PathProgramCache]: Analyzing trace with hash 365428832, now seen corresponding path program 72 times [2018-10-01 00:00:07,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:07,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:07,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:07,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:07,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:09,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:09,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:09,986 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:00:10,048 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-01 00:00:10,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:10,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:10,088 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:10,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-01 00:00:10,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-01 00:00:10,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-01 00:00:10,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-01 00:00:10,089 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-10-01 00:00:10,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:10,211 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-01 00:00:10,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-01 00:00:10,212 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-10-01 00:00:10,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:10,212 INFO L225 Difference]: With dead ends: 79 [2018-10-01 00:00:10,213 INFO L226 Difference]: Without dead ends: 77 [2018-10-01 00:00:10,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-01 00:00:10,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-01 00:00:10,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-01 00:00:10,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-01 00:00:10,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-01 00:00:10,216 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-10-01 00:00:10,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:10,216 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-01 00:00:10,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-01 00:00:10,217 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-01 00:00:10,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-01 00:00:10,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:10,217 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-10-01 00:00:10,217 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:10,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:10,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1556611962, now seen corresponding path program 73 times [2018-10-01 00:00:10,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:10,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:10,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:10,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:10,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:12,242 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:12,242 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:12,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:12,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:12,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:12,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:12,340 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-01 00:00:12,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-01 00:00:12,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-01 00:00:12,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-01 00:00:12,341 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-10-01 00:00:12,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:12,450 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-10-01 00:00:12,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-01 00:00:12,451 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-10-01 00:00:12,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:12,451 INFO L225 Difference]: With dead ends: 80 [2018-10-01 00:00:12,451 INFO L226 Difference]: Without dead ends: 78 [2018-10-01 00:00:12,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-01 00:00:12,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-01 00:00:12,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-01 00:00:12,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-01 00:00:12,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-01 00:00:12,455 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-10-01 00:00:12,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:12,455 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-01 00:00:12,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-01 00:00:12,455 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-01 00:00:12,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-01 00:00:12,456 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:12,456 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-10-01 00:00:12,456 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:12,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:12,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334432, now seen corresponding path program 74 times [2018-10-01 00:00:12,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:12,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:12,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:12,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:12,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:14,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:14,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:14,827 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:14,834 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:14,876 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:14,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:14,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:14,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:14,912 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-01 00:00:14,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-01 00:00:14,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-01 00:00:14,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-01 00:00:14,913 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-10-01 00:00:15,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:15,051 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-01 00:00:15,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-01 00:00:15,051 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-10-01 00:00:15,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:15,052 INFO L225 Difference]: With dead ends: 81 [2018-10-01 00:00:15,052 INFO L226 Difference]: Without dead ends: 79 [2018-10-01 00:00:15,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-01 00:00:15,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-01 00:00:15,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-01 00:00:15,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-01 00:00:15,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-01 00:00:15,056 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-10-01 00:00:15,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:15,056 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-01 00:00:15,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-01 00:00:15,056 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-01 00:00:15,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-01 00:00:15,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:15,057 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-10-01 00:00:15,057 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:15,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:15,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600186, now seen corresponding path program 75 times [2018-10-01 00:00:15,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:15,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:15,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:15,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:15,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:17,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:17,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:17,130 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:00:17,198 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-01 00:00:17,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:17,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:17,238 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:17,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-01 00:00:17,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-01 00:00:17,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-01 00:00:17,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-01 00:00:17,240 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-10-01 00:00:17,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:17,383 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-01 00:00:17,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-01 00:00:17,383 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-10-01 00:00:17,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:17,384 INFO L225 Difference]: With dead ends: 82 [2018-10-01 00:00:17,384 INFO L226 Difference]: Without dead ends: 80 [2018-10-01 00:00:17,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-01 00:00:17,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-01 00:00:17,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-01 00:00:17,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-01 00:00:17,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-01 00:00:17,388 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-10-01 00:00:17,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:17,388 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-01 00:00:17,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-01 00:00:17,388 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-01 00:00:17,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-01 00:00:17,389 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:17,389 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-10-01 00:00:17,389 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:17,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:17,389 INFO L82 PathProgramCache]: Analyzing trace with hash -268903968, now seen corresponding path program 76 times [2018-10-01 00:00:17,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:17,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:17,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:17,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:17,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:19,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:19,827 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:19,835 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:00:19,887 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:19,887 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:19,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:19,924 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:19,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-01 00:00:19,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-01 00:00:19,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-01 00:00:19,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-01 00:00:19,926 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-10-01 00:00:21,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:21,175 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-01 00:00:21,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-01 00:00:21,176 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-10-01 00:00:21,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:21,176 INFO L225 Difference]: With dead ends: 83 [2018-10-01 00:00:21,177 INFO L226 Difference]: Without dead ends: 81 [2018-10-01 00:00:21,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-01 00:00:21,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-01 00:00:21,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-01 00:00:21,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-01 00:00:21,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-01 00:00:21,180 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-10-01 00:00:21,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:21,180 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-01 00:00:21,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-01 00:00:21,180 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-01 00:00:21,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-01 00:00:21,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:21,181 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-10-01 00:00:21,181 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:21,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:21,181 INFO L82 PathProgramCache]: Analyzing trace with hash 253907718, now seen corresponding path program 77 times [2018-10-01 00:00:21,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:21,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:21,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:21,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:21,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:23,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:23,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:23,742 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:00:23,807 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-01 00:00:23,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:23,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:23,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:23,866 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-01 00:00:23,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-01 00:00:23,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-01 00:00:23,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-01 00:00:23,868 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-10-01 00:00:24,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:24,131 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-10-01 00:00:24,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-01 00:00:24,131 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-10-01 00:00:24,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:24,132 INFO L225 Difference]: With dead ends: 84 [2018-10-01 00:00:24,132 INFO L226 Difference]: Without dead ends: 82 [2018-10-01 00:00:24,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-01 00:00:24,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-01 00:00:24,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-01 00:00:24,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-01 00:00:24,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-01 00:00:24,136 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-10-01 00:00:24,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:24,136 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-01 00:00:24,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-01 00:00:24,136 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-01 00:00:24,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-01 00:00:24,137 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:24,137 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-10-01 00:00:24,137 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:24,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:24,138 INFO L82 PathProgramCache]: Analyzing trace with hash -718799200, now seen corresponding path program 78 times [2018-10-01 00:00:24,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:24,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:24,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:24,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:24,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:26,566 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:26,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:26,573 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:00:26,639 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-10-01 00:00:26,640 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:26,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:26,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:26,696 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:26,696 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-01 00:00:26,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-01 00:00:26,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-01 00:00:26,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-01 00:00:26,698 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-10-01 00:00:26,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:26,938 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-01 00:00:26,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-01 00:00:26,939 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-10-01 00:00:26,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:26,940 INFO L225 Difference]: With dead ends: 85 [2018-10-01 00:00:26,940 INFO L226 Difference]: Without dead ends: 83 [2018-10-01 00:00:26,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-01 00:00:26,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-01 00:00:26,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-01 00:00:26,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-01 00:00:26,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-01 00:00:26,943 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-10-01 00:00:26,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:26,944 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-01 00:00:26,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-01 00:00:26,944 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-01 00:00:26,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-01 00:00:26,944 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:26,944 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-10-01 00:00:26,945 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:26,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:26,945 INFO L82 PathProgramCache]: Analyzing trace with hash -807942586, now seen corresponding path program 79 times [2018-10-01 00:00:26,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:26,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:26,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:26,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:26,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:29,434 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:29,434 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:29,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:29,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:29,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:29,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:29,536 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-01 00:00:29,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-01 00:00:29,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-01 00:00:29,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-01 00:00:29,537 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-10-01 00:00:29,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:29,709 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-01 00:00:29,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-01 00:00:29,709 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-10-01 00:00:29,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:29,710 INFO L225 Difference]: With dead ends: 86 [2018-10-01 00:00:29,710 INFO L226 Difference]: Without dead ends: 84 [2018-10-01 00:00:29,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-01 00:00:29,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-01 00:00:29,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-01 00:00:29,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-01 00:00:29,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-01 00:00:29,716 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-10-01 00:00:29,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:29,717 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-01 00:00:29,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-01 00:00:29,717 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-01 00:00:29,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-01 00:00:29,717 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:29,717 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-10-01 00:00:29,717 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:29,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:29,718 INFO L82 PathProgramCache]: Analyzing trace with hash 723579744, now seen corresponding path program 80 times [2018-10-01 00:00:29,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:29,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:29,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:29,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:29,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:32,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:32,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:32,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:32,222 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:32,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:32,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:32,264 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:32,264 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-01 00:00:32,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-01 00:00:32,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-01 00:00:32,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-01 00:00:32,266 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-10-01 00:00:32,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:32,442 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-01 00:00:32,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-01 00:00:32,442 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-10-01 00:00:32,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:32,443 INFO L225 Difference]: With dead ends: 87 [2018-10-01 00:00:32,443 INFO L226 Difference]: Without dead ends: 85 [2018-10-01 00:00:32,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-01 00:00:32,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-01 00:00:32,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-01 00:00:32,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-01 00:00:32,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-01 00:00:32,446 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-10-01 00:00:32,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:32,447 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-01 00:00:32,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-01 00:00:32,447 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-01 00:00:32,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-01 00:00:32,447 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:32,447 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-10-01 00:00:32,447 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:32,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:32,448 INFO L82 PathProgramCache]: Analyzing trace with hash 956131718, now seen corresponding path program 81 times [2018-10-01 00:00:32,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:32,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:32,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:32,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:32,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:35,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:35,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:35,239 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:00:35,314 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-01 00:00:35,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:35,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:35,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:35,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-01 00:00:35,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-01 00:00:35,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-01 00:00:35,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-01 00:00:35,369 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-10-01 00:00:36,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:36,258 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-01 00:00:36,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-01 00:00:36,258 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-10-01 00:00:36,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:36,258 INFO L225 Difference]: With dead ends: 88 [2018-10-01 00:00:36,259 INFO L226 Difference]: Without dead ends: 86 [2018-10-01 00:00:36,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-01 00:00:36,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-01 00:00:36,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-01 00:00:36,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-01 00:00:36,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-01 00:00:36,261 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-10-01 00:00:36,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:36,261 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-01 00:00:36,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-01 00:00:36,262 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-01 00:00:36,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-01 00:00:36,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:36,262 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-10-01 00:00:36,262 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:36,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:36,263 INFO L82 PathProgramCache]: Analyzing trace with hash -424691680, now seen corresponding path program 82 times [2018-10-01 00:00:36,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:36,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:36,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:36,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:36,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:38,929 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:38,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:38,938 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:00:38,990 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:38,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:38,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:39,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:39,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-01 00:00:39,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-01 00:00:39,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-01 00:00:39,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-01 00:00:39,046 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-10-01 00:00:39,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:39,204 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-01 00:00:39,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-01 00:00:39,205 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-10-01 00:00:39,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:39,206 INFO L225 Difference]: With dead ends: 89 [2018-10-01 00:00:39,206 INFO L226 Difference]: Without dead ends: 87 [2018-10-01 00:00:39,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-01 00:00:39,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-01 00:00:39,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-01 00:00:39,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-01 00:00:39,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-01 00:00:39,209 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-10-01 00:00:39,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:39,209 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-01 00:00:39,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-01 00:00:39,209 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-01 00:00:39,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-01 00:00:39,210 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:39,210 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-10-01 00:00:39,210 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:39,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:39,210 INFO L82 PathProgramCache]: Analyzing trace with hash -280544058, now seen corresponding path program 83 times [2018-10-01 00:00:39,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:39,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:39,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:39,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:39,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:41,711 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:41,711 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:41,721 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:00:41,794 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-01 00:00:41,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:41,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:41,832 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:41,832 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-01 00:00:41,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-01 00:00:41,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-01 00:00:41,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-01 00:00:41,834 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-10-01 00:00:42,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:42,003 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-10-01 00:00:42,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-01 00:00:42,003 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-10-01 00:00:42,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:42,004 INFO L225 Difference]: With dead ends: 90 [2018-10-01 00:00:42,004 INFO L226 Difference]: Without dead ends: 88 [2018-10-01 00:00:42,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-01 00:00:42,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-01 00:00:42,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-01 00:00:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-01 00:00:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-01 00:00:42,008 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-10-01 00:00:42,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:42,009 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-01 00:00:42,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-01 00:00:42,009 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-01 00:00:42,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-01 00:00:42,009 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:42,009 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-10-01 00:00:42,009 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:42,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:42,010 INFO L82 PathProgramCache]: Analyzing trace with hash -106935072, now seen corresponding path program 84 times [2018-10-01 00:00:42,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:42,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:42,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:42,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:42,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:44,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:44,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:44,854 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:00:44,928 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-01 00:00:44,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:44,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:44,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:44,968 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:44,969 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-01 00:00:44,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-01 00:00:44,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-01 00:00:44,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-01 00:00:44,970 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-10-01 00:00:45,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:45,101 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-01 00:00:45,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-01 00:00:45,102 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-10-01 00:00:45,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:45,102 INFO L225 Difference]: With dead ends: 91 [2018-10-01 00:00:45,102 INFO L226 Difference]: Without dead ends: 89 [2018-10-01 00:00:45,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-01 00:00:45,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-01 00:00:45,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-01 00:00:45,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-01 00:00:45,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-01 00:00:45,105 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-10-01 00:00:45,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:45,105 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-01 00:00:45,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-01 00:00:45,106 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-01 00:00:45,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-01 00:00:45,107 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:45,107 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-10-01 00:00:45,108 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:45,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:45,108 INFO L82 PathProgramCache]: Analyzing trace with hash 979976198, now seen corresponding path program 85 times [2018-10-01 00:00:45,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:45,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:45,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:45,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:45,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:47,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:47,784 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:47,784 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:47,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:47,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:47,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:47,877 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:47,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-01 00:00:47,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-01 00:00:47,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-01 00:00:47,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-01 00:00:47,879 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-10-01 00:00:48,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:48,022 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-01 00:00:48,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-01 00:00:48,023 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-10-01 00:00:48,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:48,023 INFO L225 Difference]: With dead ends: 92 [2018-10-01 00:00:48,024 INFO L226 Difference]: Without dead ends: 90 [2018-10-01 00:00:48,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-01 00:00:48,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-01 00:00:48,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-01 00:00:48,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-01 00:00:48,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-01 00:00:48,027 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-10-01 00:00:48,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:48,028 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-01 00:00:48,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-01 00:00:48,028 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-01 00:00:48,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-01 00:00:48,028 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:48,028 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-10-01 00:00:48,029 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:48,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:48,029 INFO L82 PathProgramCache]: Analyzing trace with hash 314487200, now seen corresponding path program 86 times [2018-10-01 00:00:48,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:48,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:48,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:48,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:48,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:50,995 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:50,995 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:51,002 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:51,049 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:51,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:51,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:51,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:51,087 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-01 00:00:51,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-01 00:00:51,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-01 00:00:51,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-01 00:00:51,088 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-10-01 00:00:51,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:51,268 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-01 00:00:51,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-01 00:00:51,268 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-10-01 00:00:51,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:51,269 INFO L225 Difference]: With dead ends: 93 [2018-10-01 00:00:51,269 INFO L226 Difference]: Without dead ends: 91 [2018-10-01 00:00:51,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-01 00:00:51,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-01 00:00:51,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-01 00:00:51,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-01 00:00:51,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-01 00:00:51,272 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-10-01 00:00:51,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:51,272 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-01 00:00:51,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-01 00:00:51,273 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-01 00:00:51,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-01 00:00:51,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:51,273 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-10-01 00:00:51,274 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:51,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:51,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164742, now seen corresponding path program 87 times [2018-10-01 00:00:51,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:51,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:51,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:51,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:51,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:54,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:54,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:54,080 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:00:54,182 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-01 00:00:54,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:54,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:54,222 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:54,223 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-01 00:00:54,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-01 00:00:54,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-01 00:00:54,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-01 00:00:54,224 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-10-01 00:00:54,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:54,417 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-01 00:00:54,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-01 00:00:54,417 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-10-01 00:00:54,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:54,418 INFO L225 Difference]: With dead ends: 94 [2018-10-01 00:00:54,418 INFO L226 Difference]: Without dead ends: 92 [2018-10-01 00:00:54,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-01 00:00:54,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-01 00:00:54,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-01 00:00:54,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-01 00:00:54,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-01 00:00:54,421 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-10-01 00:00:54,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:54,422 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-01 00:00:54,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-01 00:00:54,422 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-01 00:00:54,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-01 00:00:54,422 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:54,422 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-10-01 00:00:54,422 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:54,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:54,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364768, now seen corresponding path program 88 times [2018-10-01 00:00:54,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:54,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:54,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:54,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:54,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:57,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:57,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:57,184 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:00:57,259 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:57,260 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:57,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:57,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:57,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:57,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-01 00:00:57,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-01 00:00:57,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-01 00:00:57,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-01 00:00:57,323 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-10-01 00:00:57,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:57,516 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-01 00:00:57,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-01 00:00:57,517 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-10-01 00:00:57,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:57,518 INFO L225 Difference]: With dead ends: 95 [2018-10-01 00:00:57,518 INFO L226 Difference]: Without dead ends: 93 [2018-10-01 00:00:57,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-01 00:00:57,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-01 00:00:57,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-01 00:00:57,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-01 00:00:57,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-01 00:00:57,521 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-10-01 00:00:57,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:57,522 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-01 00:00:57,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-01 00:00:57,522 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-01 00:00:57,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-01 00:00:57,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:57,522 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-10-01 00:00:57,522 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:57,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:57,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663686, now seen corresponding path program 89 times [2018-10-01 00:00:57,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:57,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:57,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:57,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:57,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:00,786 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:00,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:00,795 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:01:00,912 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-01 00:01:00,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:00,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:00,971 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:00,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-01 00:01:00,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-01 00:01:00,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-01 00:01:00,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-01 00:01:00,974 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-10-01 00:01:01,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:01,210 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-10-01 00:01:01,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-01 00:01:01,210 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-10-01 00:01:01,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:01,211 INFO L225 Difference]: With dead ends: 96 [2018-10-01 00:01:01,211 INFO L226 Difference]: Without dead ends: 94 [2018-10-01 00:01:01,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-01 00:01:01,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-01 00:01:01,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-01 00:01:01,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-01 00:01:01,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-01 00:01:01,215 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-10-01 00:01:01,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:01,215 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-01 00:01:01,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-01 00:01:01,215 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-01 00:01:01,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-01 00:01:01,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:01,215 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-10-01 00:01:01,216 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:01,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:01,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930144, now seen corresponding path program 90 times [2018-10-01 00:01:01,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:01,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:01,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:01,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:01,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:04,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:04,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:04,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:04,106 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:01:04,188 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-01 00:01:04,188 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:04,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:04,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:04,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-01 00:01:04,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-01 00:01:04,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-01 00:01:04,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-01 00:01:04,231 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-10-01 00:01:04,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:04,502 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-01 00:01:04,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-01 00:01:04,502 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-10-01 00:01:04,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:04,503 INFO L225 Difference]: With dead ends: 97 [2018-10-01 00:01:04,503 INFO L226 Difference]: Without dead ends: 95 [2018-10-01 00:01:04,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-01 00:01:04,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-01 00:01:04,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-01 00:01:04,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-01 00:01:04,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-01 00:01:04,507 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-10-01 00:01:04,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:04,507 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-01 00:01:04,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-01 00:01:04,507 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-01 00:01:04,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-01 00:01:04,508 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:04,508 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-10-01 00:01:04,508 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:04,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:04,508 INFO L82 PathProgramCache]: Analyzing trace with hash 854092230, now seen corresponding path program 91 times [2018-10-01 00:01:04,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:04,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:04,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:04,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:04,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:07,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:07,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:07,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:07,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:07,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:07,665 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-01 00:01:07,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-01 00:01:07,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-01 00:01:07,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-01 00:01:07,667 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-10-01 00:01:07,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:07,847 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-01 00:01:07,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-01 00:01:07,847 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-10-01 00:01:07,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:07,848 INFO L225 Difference]: With dead ends: 98 [2018-10-01 00:01:07,848 INFO L226 Difference]: Without dead ends: 96 [2018-10-01 00:01:07,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-01 00:01:07,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-01 00:01:07,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-01 00:01:07,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-01 00:01:07,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-01 00:01:07,852 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-10-01 00:01:07,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:07,852 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-01 00:01:07,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-01 00:01:07,852 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-01 00:01:07,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-01 00:01:07,853 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:07,853 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-10-01 00:01:07,853 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:07,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:07,853 INFO L82 PathProgramCache]: Analyzing trace with hash 707051488, now seen corresponding path program 92 times [2018-10-01 00:01:07,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:07,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:07,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:07,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:07,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:11,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:11,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:11,826 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:01:11,877 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:01:11,877 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:11,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:11,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:11,933 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-01 00:01:11,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-01 00:01:11,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-01 00:01:11,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-01 00:01:11,935 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-10-01 00:01:12,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:12,101 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-01 00:01:12,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-01 00:01:12,102 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-10-01 00:01:12,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:12,103 INFO L225 Difference]: With dead ends: 99 [2018-10-01 00:01:12,103 INFO L226 Difference]: Without dead ends: 97 [2018-10-01 00:01:12,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-01 00:01:12,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-01 00:01:12,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-01 00:01:12,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-01 00:01:12,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-01 00:01:12,106 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-10-01 00:01:12,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:12,106 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-01 00:01:12,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-01 00:01:12,106 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-01 00:01:12,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-01 00:01:12,107 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:12,107 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-10-01 00:01:12,107 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:12,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:12,107 INFO L82 PathProgramCache]: Analyzing trace with hash 443755782, now seen corresponding path program 93 times [2018-10-01 00:01:12,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:12,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:12,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:12,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:12,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:15,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:15,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:15,523 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:01:15,611 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-01 00:01:15,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:15,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:15,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:15,665 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-01 00:01:15,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-01 00:01:15,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-01 00:01:15,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-01 00:01:15,666 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-10-01 00:01:15,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:15,817 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-01 00:01:15,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-01 00:01:15,817 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-10-01 00:01:15,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:15,818 INFO L225 Difference]: With dead ends: 100 [2018-10-01 00:01:15,818 INFO L226 Difference]: Without dead ends: 98 [2018-10-01 00:01:15,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-01 00:01:15,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-01 00:01:15,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-01 00:01:15,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-01 00:01:15,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-01 00:01:15,822 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-10-01 00:01:15,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:15,822 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-01 00:01:15,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-01 00:01:15,822 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-01 00:01:15,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-01 00:01:15,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:15,823 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-10-01 00:01:15,823 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:15,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:15,823 INFO L82 PathProgramCache]: Analyzing trace with hash 871523488, now seen corresponding path program 94 times [2018-10-01 00:01:15,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:15,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:15,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:15,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:15,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:18,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:18,988 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:18,988 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:18,995 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:01:19,055 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:01:19,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:19,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:19,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:19,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-01 00:01:19,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-01 00:01:19,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-01 00:01:19,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-01 00:01:19,116 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-10-01 00:01:19,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:19,287 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-01 00:01:19,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-01 00:01:19,287 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-10-01 00:01:19,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:19,288 INFO L225 Difference]: With dead ends: 101 [2018-10-01 00:01:19,288 INFO L226 Difference]: Without dead ends: 99 [2018-10-01 00:01:19,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-01 00:01:19,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-01 00:01:19,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-01 00:01:19,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-01 00:01:19,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-01 00:01:19,292 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-10-01 00:01:19,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:19,293 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-01 00:01:19,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-01 00:01:19,293 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-01 00:01:19,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-01 00:01:19,293 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:19,294 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-10-01 00:01:19,294 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:19,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:19,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420486, now seen corresponding path program 95 times [2018-10-01 00:01:19,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:19,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:19,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:19,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:19,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:22,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:22,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:22,949 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:01:23,038 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-01 00:01:23,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:23,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:23,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:23,080 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:23,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-01 00:01:23,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-01 00:01:23,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-01 00:01:23,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-01 00:01:23,082 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-10-01 00:01:23,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:23,284 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-01 00:01:23,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-01 00:01:23,284 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-10-01 00:01:23,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:23,285 INFO L225 Difference]: With dead ends: 102 [2018-10-01 00:01:23,286 INFO L226 Difference]: Without dead ends: 100 [2018-10-01 00:01:23,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-01 00:01:23,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-01 00:01:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-01 00:01:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-01 00:01:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-01 00:01:23,289 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-10-01 00:01:23,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:23,289 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-01 00:01:23,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-01 00:01:23,290 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-01 00:01:23,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-01 00:01:23,290 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:23,290 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-10-01 00:01:23,290 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:23,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:23,290 INFO L82 PathProgramCache]: Analyzing trace with hash 15325536, now seen corresponding path program 96 times [2018-10-01 00:01:23,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:23,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:23,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:23,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:23,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:26,881 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:26,882 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:26,889 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:01:26,977 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-01 00:01:26,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:26,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:27,028 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:27,029 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-01 00:01:27,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-01 00:01:27,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-01 00:01:27,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-01 00:01:27,030 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-10-01 00:01:27,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:27,230 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-01 00:01:27,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-01 00:01:27,231 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-10-01 00:01:27,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:27,232 INFO L225 Difference]: With dead ends: 103 [2018-10-01 00:01:27,232 INFO L226 Difference]: Without dead ends: 101 [2018-10-01 00:01:27,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-01 00:01:27,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-01 00:01:27,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-01 00:01:27,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-01 00:01:27,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-01 00:01:27,236 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-10-01 00:01:27,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:27,236 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-01 00:01:27,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-01 00:01:27,236 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-01 00:01:27,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-01 00:01:27,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:27,236 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-10-01 00:01:27,237 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:27,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:27,237 INFO L82 PathProgramCache]: Analyzing trace with hash 475087750, now seen corresponding path program 97 times [2018-10-01 00:01:27,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:27,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:27,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:27,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:27,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:30,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:30,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:30,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:31,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:31,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:31,052 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:31,052 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-01 00:01:31,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-01 00:01:31,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-01 00:01:31,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-01 00:01:31,053 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-10-01 00:01:31,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:31,299 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-10-01 00:01:31,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-01 00:01:31,300 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-10-01 00:01:31,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:31,301 INFO L225 Difference]: With dead ends: 104 [2018-10-01 00:01:31,301 INFO L226 Difference]: Without dead ends: 102 [2018-10-01 00:01:31,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-01 00:01:31,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-01 00:01:31,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-01 00:01:31,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-01 00:01:31,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-01 00:01:31,304 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-10-01 00:01:31,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:31,305 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-01 00:01:31,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-01 00:01:31,305 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-01 00:01:31,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-01 00:01:31,305 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:31,305 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-10-01 00:01:31,305 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:31,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:31,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814496, now seen corresponding path program 98 times [2018-10-01 00:01:31,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:31,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:31,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:31,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:31,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:34,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:34,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:34,717 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:01:34,773 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:01:34,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:34,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:34,816 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:34,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-01 00:01:34,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-01 00:01:34,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-01 00:01:34,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-01 00:01:34,818 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-10-01 00:01:35,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:35,105 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-01 00:01:35,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-01 00:01:35,105 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-10-01 00:01:35,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:35,106 INFO L225 Difference]: With dead ends: 105 [2018-10-01 00:01:35,106 INFO L226 Difference]: Without dead ends: 103 [2018-10-01 00:01:35,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-01 00:01:35,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-01 00:01:35,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-01 00:01:35,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-01 00:01:35,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-01 00:01:35,110 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-10-01 00:01:35,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:35,110 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-01 00:01:35,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-01 00:01:35,110 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-01 00:01:35,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-01 00:01:35,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:35,111 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-10-01 00:01:35,111 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:35,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:35,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670662, now seen corresponding path program 99 times [2018-10-01 00:01:35,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:35,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:35,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:35,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:35,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:38,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:38,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:38,752 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:01:38,851 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-10-01 00:01:38,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:38,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:38,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:38,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-01 00:01:38,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-01 00:01:38,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-01 00:01:38,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-01 00:01:38,904 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-10-01 00:01:39,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:39,090 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-01 00:01:39,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-01 00:01:39,090 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-10-01 00:01:39,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:39,091 INFO L225 Difference]: With dead ends: 106 [2018-10-01 00:01:39,091 INFO L226 Difference]: Without dead ends: 104 [2018-10-01 00:01:39,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 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 00:01:39,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-01 00:01:39,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-01 00:01:39,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-01 00:01:39,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-01 00:01:39,094 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-10-01 00:01:39,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:39,095 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-01 00:01:39,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-01 00:01:39,095 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-01 00:01:39,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-01 00:01:39,095 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:39,095 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-10-01 00:01:39,096 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:39,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:39,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080992, now seen corresponding path program 100 times [2018-10-01 00:01:39,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:39,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:39,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:39,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:39,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:43,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:43,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:43,023 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:01:43,086 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:01:43,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:43,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:43,129 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:43,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-01 00:01:43,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-01 00:01:43,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-01 00:01:43,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-01 00:01:43,130 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-10-01 00:01:43,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:43,386 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-01 00:01:43,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-01 00:01:43,387 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-10-01 00:01:43,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:43,388 INFO L225 Difference]: With dead ends: 107 [2018-10-01 00:01:43,388 INFO L226 Difference]: Without dead ends: 105 [2018-10-01 00:01:43,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-01 00:01:43,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-01 00:01:43,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-01 00:01:43,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-01 00:01:43,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-01 00:01:43,392 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-10-01 00:01:43,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:43,392 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-01 00:01:43,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-01 00:01:43,392 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-01 00:01:43,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-01 00:01:43,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:43,393 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-10-01 00:01:43,393 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:43,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:43,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1010833926, now seen corresponding path program 101 times [2018-10-01 00:01:43,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:43,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:43,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:43,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:43,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:47,298 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:47,298 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:47,305 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:01:47,413 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-10-01 00:01:47,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:47,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:47,467 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:47,468 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-01 00:01:47,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-01 00:01:47,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-01 00:01:47,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-01 00:01:47,469 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-10-01 00:01:47,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:47,632 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-10-01 00:01:47,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-01 00:01:47,633 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-10-01 00:01:47,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:47,634 INFO L225 Difference]: With dead ends: 108 [2018-10-01 00:01:47,634 INFO L226 Difference]: Without dead ends: 106 [2018-10-01 00:01:47,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-01 00:01:47,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-01 00:01:47,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-01 00:01:47,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-01 00:01:47,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-01 00:01:47,638 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-10-01 00:01:47,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:47,638 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-01 00:01:47,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-01 00:01:47,638 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-01 00:01:47,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-01 00:01:47,639 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:47,639 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-10-01 00:01:47,639 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:47,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:47,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1271076768, now seen corresponding path program 102 times [2018-10-01 00:01:47,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:47,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:47,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:47,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:47,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:51,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:51,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:51,622 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:01:51,714 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-10-01 00:01:51,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:51,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:51,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:51,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-01 00:01:51,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-01 00:01:51,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-01 00:01:51,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-01 00:01:51,763 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-10-01 00:01:52,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:52,030 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-01 00:01:52,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-01 00:01:52,031 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-10-01 00:01:52,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:52,032 INFO L225 Difference]: With dead ends: 109 [2018-10-01 00:01:52,032 INFO L226 Difference]: Without dead ends: 107 [2018-10-01 00:01:52,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-01 00:01:52,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-01 00:01:52,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-01 00:01:52,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-01 00:01:52,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-01 00:01:52,036 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-10-01 00:01:52,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:52,036 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-01 00:01:52,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-01 00:01:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-01 00:01:52,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-01 00:01:52,036 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:52,037 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-10-01 00:01:52,037 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:52,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:52,037 INFO L82 PathProgramCache]: Analyzing trace with hash 748670278, now seen corresponding path program 103 times [2018-10-01 00:01:52,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:52,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:52,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:52,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:52,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:56,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:56,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:56,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:56,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:56,205 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:56,205 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-01 00:01:56,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-01 00:01:56,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-01 00:01:56,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-01 00:01:56,206 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-10-01 00:01:56,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:56,429 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-01 00:01:56,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-01 00:01:56,429 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-10-01 00:01:56,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:56,430 INFO L225 Difference]: With dead ends: 110 [2018-10-01 00:01:56,430 INFO L226 Difference]: Without dead ends: 108 [2018-10-01 00:01:56,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-01 00:01:56,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-01 00:01:56,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-01 00:01:56,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-01 00:01:56,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-01 00:01:56,434 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-10-01 00:01:56,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:56,434 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-01 00:01:56,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-01 00:01:56,434 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-01 00:01:56,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-01 00:01:56,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:56,434 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-10-01 00:01:56,435 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:56,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:56,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1733938272, now seen corresponding path program 104 times [2018-10-01 00:01:56,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:56,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:56,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:56,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:56,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:00,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:00,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:00,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:00,420 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:02:00,480 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:02:00,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:00,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:00,539 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:00,540 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-01 00:02:00,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-01 00:02:00,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-01 00:02:00,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-01 00:02:00,542 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-10-01 00:02:00,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:00,970 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-01 00:02:00,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-01 00:02:00,971 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-10-01 00:02:00,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:00,971 INFO L225 Difference]: With dead ends: 111 [2018-10-01 00:02:00,972 INFO L226 Difference]: Without dead ends: 109 [2018-10-01 00:02:00,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-01 00:02:00,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-01 00:02:00,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-01 00:02:00,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-01 00:02:00,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-01 00:02:00,975 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-10-01 00:02:00,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:00,975 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-01 00:02:00,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-01 00:02:00,976 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-01 00:02:00,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-01 00:02:00,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:00,976 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-10-01 00:02:00,977 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:00,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:00,977 INFO L82 PathProgramCache]: Analyzing trace with hash -2082492282, now seen corresponding path program 105 times [2018-10-01 00:02:00,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:00,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:00,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:00,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:00,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:04,928 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:04,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:04,944 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:02:05,051 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-10-01 00:02:05,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:05,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:05,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:05,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:05,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-01 00:02:05,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-01 00:02:05,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-01 00:02:05,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-01 00:02:05,097 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-10-01 00:02:05,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:05,349 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-01 00:02:05,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-01 00:02:05,350 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-10-01 00:02:05,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:05,351 INFO L225 Difference]: With dead ends: 112 [2018-10-01 00:02:05,351 INFO L226 Difference]: Without dead ends: 110 [2018-10-01 00:02:05,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-01 00:02:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-01 00:02:05,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-01 00:02:05,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-01 00:02:05,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-01 00:02:05,354 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-10-01 00:02:05,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:05,355 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-01 00:02:05,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-01 00:02:05,355 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-01 00:02:05,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-01 00:02:05,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:05,356 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-10-01 00:02:05,356 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:05,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:05,356 INFO L82 PathProgramCache]: Analyzing trace with hash -132755168, now seen corresponding path program 106 times [2018-10-01 00:02:05,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:05,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:05,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:05,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:05,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:09,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:09,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:09,552 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:02:09,619 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:02:09,619 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:09,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:09,663 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:09,663 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-10-01 00:02:09,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-10-01 00:02:09,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-10-01 00:02:09,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-01 00:02:09,665 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-10-01 00:02:09,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:09,891 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-01 00:02:09,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-01 00:02:09,892 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-10-01 00:02:09,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:09,892 INFO L225 Difference]: With dead ends: 113 [2018-10-01 00:02:09,892 INFO L226 Difference]: Without dead ends: 111 [2018-10-01 00:02:09,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-01 00:02:09,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-01 00:02:09,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-01 00:02:09,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-01 00:02:09,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-01 00:02:09,896 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-10-01 00:02:09,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:09,896 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-01 00:02:09,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-10-01 00:02:09,896 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-01 00:02:09,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-01 00:02:09,897 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:09,897 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-10-01 00:02:09,897 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:09,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:09,897 INFO L82 PathProgramCache]: Analyzing trace with hash 179553222, now seen corresponding path program 107 times [2018-10-01 00:02:09,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:09,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:09,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:09,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:09,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:14,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:14,277 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:14,284 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:02:14,388 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-01 00:02:14,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:14,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:14,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:14,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-10-01 00:02:14,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-01 00:02:14,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-01 00:02:14,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-01 00:02:14,435 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-10-01 00:02:14,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:14,612 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-10-01 00:02:14,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-01 00:02:14,612 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-10-01 00:02:14,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:14,613 INFO L225 Difference]: With dead ends: 114 [2018-10-01 00:02:14,613 INFO L226 Difference]: Without dead ends: 112 [2018-10-01 00:02:14,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-01 00:02:14,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-01 00:02:14,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-01 00:02:14,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-01 00:02:14,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-01 00:02:14,616 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-10-01 00:02:14,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:14,617 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-01 00:02:14,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-01 00:02:14,617 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-01 00:02:14,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-01 00:02:14,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:14,617 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-10-01 00:02:14,617 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:14,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:14,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1271178720, now seen corresponding path program 108 times [2018-10-01 00:02:14,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:14,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:14,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:14,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:14,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:19,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:19,233 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:19,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:19,240 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:02:19,348 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-01 00:02:19,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:19,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:19,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:19,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:19,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-10-01 00:02:19,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-10-01 00:02:19,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-10-01 00:02:19,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-01 00:02:19,398 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-10-01 00:02:19,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:19,692 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-01 00:02:19,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-01 00:02:19,693 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-10-01 00:02:19,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:19,693 INFO L225 Difference]: With dead ends: 115 [2018-10-01 00:02:19,693 INFO L226 Difference]: Without dead ends: 113 [2018-10-01 00:02:19,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-01 00:02:19,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-01 00:02:19,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-01 00:02:19,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-01 00:02:19,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-01 00:02:19,697 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-10-01 00:02:19,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:19,697 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-01 00:02:19,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-10-01 00:02:19,697 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-01 00:02:19,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-01 00:02:19,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:19,698 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-10-01 00:02:19,698 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:19,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:19,698 INFO L82 PathProgramCache]: Analyzing trace with hash 751830790, now seen corresponding path program 109 times [2018-10-01 00:02:19,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:19,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:19,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:19,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:19,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:24,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:24,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:24,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:24,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:24,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:24,333 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:24,333 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-10-01 00:02:24,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-01 00:02:24,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-01 00:02:24,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-10-01 00:02:24,335 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-10-01 00:02:24,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:24,564 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-10-01 00:02:24,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-01 00:02:24,564 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-10-01 00:02:24,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:24,565 INFO L225 Difference]: With dead ends: 116 [2018-10-01 00:02:24,565 INFO L226 Difference]: Without dead ends: 114 [2018-10-01 00:02:24,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-10-01 00:02:24,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-01 00:02:24,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-01 00:02:24,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-01 00:02:24,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-01 00:02:24,568 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-10-01 00:02:24,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:24,569 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-01 00:02:24,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-01 00:02:24,569 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-01 00:02:24,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-01 00:02:24,569 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:24,569 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-10-01 00:02:24,570 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:24,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:24,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1831914144, now seen corresponding path program 110 times [2018-10-01 00:02:24,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:24,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:24,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:24,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:24,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:29,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:29,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:29,254 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:02:29,317 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:02:29,317 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:29,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:29,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:29,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-10-01 00:02:29,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-10-01 00:02:29,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-10-01 00:02:29,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-10-01 00:02:29,364 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-10-01 00:02:29,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:29,707 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-01 00:02:29,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-10-01 00:02:29,708 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-10-01 00:02:29,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:29,709 INFO L225 Difference]: With dead ends: 117 [2018-10-01 00:02:29,709 INFO L226 Difference]: Without dead ends: 115 [2018-10-01 00:02:29,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-10-01 00:02:29,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-01 00:02:29,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-01 00:02:29,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-01 00:02:29,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-01 00:02:29,712 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-10-01 00:02:29,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:29,712 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-01 00:02:29,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-10-01 00:02:29,712 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-01 00:02:29,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-01 00:02:29,713 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:29,713 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-10-01 00:02:29,713 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:29,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:29,714 INFO L82 PathProgramCache]: Analyzing trace with hash 954759750, now seen corresponding path program 111 times [2018-10-01 00:02:29,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:29,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:29,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:29,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:29,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:34,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:34,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:34,411 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:02:34,531 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-10-01 00:02:34,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:34,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:34,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:34,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-10-01 00:02:34,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-01 00:02:34,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-01 00:02:34,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-10-01 00:02:34,579 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 114 states. [2018-10-01 00:02:34,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:34,792 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-10-01 00:02:34,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-10-01 00:02:34,792 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-10-01 00:02:34,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:34,793 INFO L225 Difference]: With dead ends: 118 [2018-10-01 00:02:34,793 INFO L226 Difference]: Without dead ends: 116 [2018-10-01 00:02:34,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-10-01 00:02:34,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-01 00:02:34,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-01 00:02:34,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-01 00:02:34,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-10-01 00:02:34,798 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-10-01 00:02:34,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:34,798 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-10-01 00:02:34,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-01 00:02:34,798 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-10-01 00:02:34,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-01 00:02:34,799 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:34,799 INFO L375 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-10-01 00:02:34,799 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:34,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:34,799 INFO L82 PathProgramCache]: Analyzing trace with hash -467222688, now seen corresponding path program 112 times [2018-10-01 00:02:34,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:34,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:34,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:34,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:34,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:39,549 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:39,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:39,555 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:02:39,632 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:02:39,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:39,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:39,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:39,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-10-01 00:02:39,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-10-01 00:02:39,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-10-01 00:02:39,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-10-01 00:02:39,683 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 115 states. [2018-10-01 00:02:39,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:39,955 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-01 00:02:39,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-10-01 00:02:39,955 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 115 [2018-10-01 00:02:39,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:39,956 INFO L225 Difference]: With dead ends: 119 [2018-10-01 00:02:39,956 INFO L226 Difference]: Without dead ends: 117 [2018-10-01 00:02:39,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-10-01 00:02:39,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-01 00:02:39,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-01 00:02:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-01 00:02:39,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-10-01 00:02:39,958 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2018-10-01 00:02:39,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:39,959 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-10-01 00:02:39,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-10-01 00:02:39,959 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-10-01 00:02:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-01 00:02:39,960 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:39,960 INFO L375 BasicCegarLoop]: trace histogram [113, 1, 1, 1] [2018-10-01 00:02:39,960 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:39,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:39,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1599005306, now seen corresponding path program 113 times [2018-10-01 00:02:39,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:39,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:39,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:39,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:39,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:44,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:44,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:44,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:44,813 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:02:44,929 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-10-01 00:02:44,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:44,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:44,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:44,987 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:44,988 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-10-01 00:02:44,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-01 00:02:44,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-01 00:02:44,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-10-01 00:02:44,989 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 116 states. [2018-10-01 00:02:45,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:45,245 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-10-01 00:02:45,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-10-01 00:02:45,245 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 116 [2018-10-01 00:02:45,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:45,246 INFO L225 Difference]: With dead ends: 120 [2018-10-01 00:02:45,246 INFO L226 Difference]: Without dead ends: 118 [2018-10-01 00:02:45,247 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-10-01 00:02:45,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-01 00:02:45,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-01 00:02:45,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-01 00:02:45,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-10-01 00:02:45,250 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2018-10-01 00:02:45,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:45,250 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-10-01 00:02:45,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-01 00:02:45,250 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-10-01 00:02:45,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-01 00:02:45,251 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:45,251 INFO L375 BasicCegarLoop]: trace histogram [114, 1, 1, 1] [2018-10-01 00:02:45,251 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:45,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:45,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1970439200, now seen corresponding path program 114 times [2018-10-01 00:02:45,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:45,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:45,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:45,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:45,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:50,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:50,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:50,045 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:02:50,170 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2018-10-01 00:02:50,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:50,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:50,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:50,216 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:50,216 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 116 [2018-10-01 00:02:50,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-10-01 00:02:50,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-10-01 00:02:50,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-10-01 00:02:50,217 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 117 states. [2018-10-01 00:02:50,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:50,555 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-01 00:02:50,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-10-01 00:02:50,555 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 117 [2018-10-01 00:02:50,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:50,556 INFO L225 Difference]: With dead ends: 121 [2018-10-01 00:02:50,556 INFO L226 Difference]: Without dead ends: 119 [2018-10-01 00:02:50,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-10-01 00:02:50,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-01 00:02:50,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-01 00:02:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-01 00:02:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-01 00:02:50,558 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2018-10-01 00:02:50,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:50,559 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-01 00:02:50,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-10-01 00:02:50,559 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-01 00:02:50,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-01 00:02:50,559 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:50,559 INFO L375 BasicCegarLoop]: trace histogram [115, 1, 1, 1] [2018-10-01 00:02:50,560 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:50,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:50,560 INFO L82 PathProgramCache]: Analyzing trace with hash 954069190, now seen corresponding path program 115 times [2018-10-01 00:02:50,560 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:50,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:50,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:50,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:50,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:55,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:55,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:55,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:55,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:55,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:55,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:55,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-10-01 00:02:55,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-01 00:02:55,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-01 00:02:55,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-10-01 00:02:55,627 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 118 states. [2018-10-01 00:02:56,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:56,021 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-10-01 00:02:56,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-10-01 00:02:56,022 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 118 [2018-10-01 00:02:56,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:56,022 INFO L225 Difference]: With dead ends: 122 [2018-10-01 00:02:56,023 INFO L226 Difference]: Without dead ends: 120 [2018-10-01 00:02:56,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-10-01 00:02:56,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-01 00:02:56,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-01 00:02:56,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-01 00:02:56,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-10-01 00:02:56,025 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2018-10-01 00:02:56,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:56,025 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-10-01 00:02:56,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-01 00:02:56,025 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-10-01 00:02:56,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-01 00:02:56,026 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:56,026 INFO L375 BasicCegarLoop]: trace histogram [116, 1, 1, 1] [2018-10-01 00:02:56,026 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:56,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:56,026 INFO L82 PathProgramCache]: Analyzing trace with hash -488630048, now seen corresponding path program 116 times [2018-10-01 00:02:56,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:56,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:56,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:56,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:56,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:01,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:01,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:01,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:01,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:03:01,243 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:03:01,244 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:01,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:01,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:01,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:01,291 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 118 [2018-10-01 00:03:01,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-10-01 00:03:01,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-10-01 00:03:01,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-10-01 00:03:01,292 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 119 states. [2018-10-01 00:03:01,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:01,522 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-01 00:03:01,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-10-01 00:03:01,522 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 119 [2018-10-01 00:03:01,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:01,523 INFO L225 Difference]: With dead ends: 123 [2018-10-01 00:03:01,523 INFO L226 Difference]: Without dead ends: 121 [2018-10-01 00:03:01,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-10-01 00:03:01,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-01 00:03:01,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-01 00:03:01,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-01 00:03:01,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-10-01 00:03:01,527 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2018-10-01 00:03:01,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:01,527 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-10-01 00:03:01,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-10-01 00:03:01,527 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-10-01 00:03:01,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-01 00:03:01,527 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:01,527 INFO L375 BasicCegarLoop]: trace histogram [117, 1, 1, 1] [2018-10-01 00:03:01,528 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:01,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:01,528 INFO L82 PathProgramCache]: Analyzing trace with hash 2032333830, now seen corresponding path program 117 times [2018-10-01 00:03:01,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:01,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:01,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:01,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:01,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:06,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:06,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:06,564 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:03:06,690 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-10-01 00:03:06,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:06,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:06,738 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:06,738 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-10-01 00:03:06,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-01 00:03:06,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-01 00:03:06,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-10-01 00:03:06,740 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 120 states. [2018-10-01 00:03:07,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:07,116 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-10-01 00:03:07,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-01 00:03:07,116 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 120 [2018-10-01 00:03:07,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:07,117 INFO L225 Difference]: With dead ends: 124 [2018-10-01 00:03:07,117 INFO L226 Difference]: Without dead ends: 122 [2018-10-01 00:03:07,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-10-01 00:03:07,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-01 00:03:07,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-10-01 00:03:07,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-01 00:03:07,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-10-01 00:03:07,120 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2018-10-01 00:03:07,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:07,121 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-10-01 00:03:07,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-01 00:03:07,121 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-10-01 00:03:07,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-01 00:03:07,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:07,121 INFO L375 BasicCegarLoop]: trace histogram [118, 1, 1, 1] [2018-10-01 00:03:07,121 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:07,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:07,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1422164576, now seen corresponding path program 118 times [2018-10-01 00:03:07,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:07,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:07,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:07,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:07,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:12,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:12,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:12,193 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:03:12,272 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:03:12,272 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:12,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:12,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:12,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2018-10-01 00:03:12,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-10-01 00:03:12,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-10-01 00:03:12,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-10-01 00:03:12,323 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 121 states. [2018-10-01 00:03:12,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:12,704 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-01 00:03:12,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-10-01 00:03:12,704 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 121 [2018-10-01 00:03:12,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:12,705 INFO L225 Difference]: With dead ends: 125 [2018-10-01 00:03:12,705 INFO L226 Difference]: Without dead ends: 123 [2018-10-01 00:03:12,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-10-01 00:03:12,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-01 00:03:12,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-01 00:03:12,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-01 00:03:12,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-01 00:03:12,708 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 121 [2018-10-01 00:03:12,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:12,708 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-01 00:03:12,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-10-01 00:03:12,708 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-01 00:03:12,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-01 00:03:12,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:12,709 INFO L375 BasicCegarLoop]: trace histogram [119, 1, 1, 1] [2018-10-01 00:03:12,709 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:12,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:12,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1137432762, now seen corresponding path program 119 times [2018-10-01 00:03:12,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:12,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:12,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:12,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:12,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:18,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:18,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:18,027 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:03:18,153 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-10-01 00:03:18,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:18,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:18,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:18,201 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 121 [2018-10-01 00:03:18,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-01 00:03:18,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-01 00:03:18,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-10-01 00:03:18,203 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 122 states. [2018-10-01 00:03:18,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:18,591 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-10-01 00:03:18,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-01 00:03:18,591 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 122 [2018-10-01 00:03:18,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:18,592 INFO L225 Difference]: With dead ends: 126 [2018-10-01 00:03:18,592 INFO L226 Difference]: Without dead ends: 124 [2018-10-01 00:03:18,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-10-01 00:03:18,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-01 00:03:18,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-10-01 00:03:18,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-01 00:03:18,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-01 00:03:18,595 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 122 [2018-10-01 00:03:18,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:18,596 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-01 00:03:18,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-01 00:03:18,596 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-01 00:03:18,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-01 00:03:18,596 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:18,596 INFO L375 BasicCegarLoop]: trace histogram [120, 1, 1, 1] [2018-10-01 00:03:18,597 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:18,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:18,597 INFO L82 PathProgramCache]: Analyzing trace with hash -900681120, now seen corresponding path program 120 times [2018-10-01 00:03:18,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:18,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:18,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:18,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:18,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:24,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:24,192 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:24,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:24,201 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:03:24,324 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-01 00:03:24,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:24,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:24,372 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:24,373 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 122 [2018-10-01 00:03:24,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-10-01 00:03:24,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-10-01 00:03:24,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-10-01 00:03:24,374 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 123 states. [2018-10-01 00:03:24,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:24,689 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-01 00:03:24,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-10-01 00:03:24,689 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 123 [2018-10-01 00:03:24,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:24,690 INFO L225 Difference]: With dead ends: 127 [2018-10-01 00:03:24,690 INFO L226 Difference]: Without dead ends: 125 [2018-10-01 00:03:24,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-10-01 00:03:24,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-01 00:03:24,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-01 00:03:24,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-01 00:03:24,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-01 00:03:24,693 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 123 [2018-10-01 00:03:24,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:24,693 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-01 00:03:24,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-10-01 00:03:24,694 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-01 00:03:24,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-01 00:03:24,694 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:24,694 INFO L375 BasicCegarLoop]: trace histogram [121, 1, 1, 1] [2018-10-01 00:03:24,694 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:24,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:24,694 INFO L82 PathProgramCache]: Analyzing trace with hash 2143652486, now seen corresponding path program 121 times [2018-10-01 00:03:24,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:24,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:24,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:24,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:24,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:30,288 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:30,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:30,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:03:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:30,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:30,410 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:30,410 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 123 [2018-10-01 00:03:30,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-10-01 00:03:30,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-10-01 00:03:30,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-10-01 00:03:30,412 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 124 states. [2018-10-01 00:03:30,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:30,626 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-10-01 00:03:30,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-10-01 00:03:30,626 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 124 [2018-10-01 00:03:30,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:30,627 INFO L225 Difference]: With dead ends: 128 [2018-10-01 00:03:30,627 INFO L226 Difference]: Without dead ends: 126 [2018-10-01 00:03:30,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-10-01 00:03:30,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-01 00:03:30,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-01 00:03:30,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-01 00:03:30,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-10-01 00:03:30,630 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 124 [2018-10-01 00:03:30,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:30,630 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-10-01 00:03:30,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-10-01 00:03:30,630 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-10-01 00:03:30,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-01 00:03:30,631 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:30,631 INFO L375 BasicCegarLoop]: trace histogram [122, 1, 1, 1] [2018-10-01 00:03:30,631 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:30,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:30,631 INFO L82 PathProgramCache]: Analyzing trace with hash 2028713760, now seen corresponding path program 122 times [2018-10-01 00:03:30,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:30,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:30,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:30,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:03:30,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:30,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:36,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:36,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:36,187 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:03:36,267 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:03:36,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:36,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:36,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:36,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:36,322 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 124 [2018-10-01 00:03:36,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-10-01 00:03:36,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-10-01 00:03:36,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-10-01 00:03:36,324 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 125 states. [2018-10-01 00:03:36,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:36,580 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-01 00:03:36,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-10-01 00:03:36,581 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 125 [2018-10-01 00:03:36,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:36,582 INFO L225 Difference]: With dead ends: 129 [2018-10-01 00:03:36,582 INFO L226 Difference]: Without dead ends: 127 [2018-10-01 00:03:36,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-10-01 00:03:36,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-01 00:03:36,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-01 00:03:36,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-01 00:03:36,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-10-01 00:03:36,586 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 125 [2018-10-01 00:03:36,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:36,586 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-10-01 00:03:36,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-10-01 00:03:36,586 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-10-01 00:03:36,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-01 00:03:36,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:36,587 INFO L375 BasicCegarLoop]: trace histogram [123, 1, 1, 1] [2018-10-01 00:03:36,587 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:36,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:36,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1534386746, now seen corresponding path program 123 times [2018-10-01 00:03:36,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:36,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:36,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:36,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:36,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:42,327 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:42,327 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:42,334 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:03:42,471 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-10-01 00:03:42,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:42,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:42,519 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:42,519 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 125 [2018-10-01 00:03:42,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-01 00:03:42,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-01 00:03:42,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-10-01 00:03:42,521 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 126 states. [2018-10-01 00:03:42,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:42,861 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-10-01 00:03:42,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-10-01 00:03:42,861 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 126 [2018-10-01 00:03:42,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:42,861 INFO L225 Difference]: With dead ends: 130 [2018-10-01 00:03:42,861 INFO L226 Difference]: Without dead ends: 128 [2018-10-01 00:03:42,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-10-01 00:03:42,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-01 00:03:42,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-10-01 00:03:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-01 00:03:42,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-01 00:03:42,865 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 126 [2018-10-01 00:03:42,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:42,865 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-01 00:03:42,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-01 00:03:42,865 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-01 00:03:42,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-01 00:03:42,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:42,865 INFO L375 BasicCegarLoop]: trace histogram [124, 1, 1, 1] [2018-10-01 00:03:42,865 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:42,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:42,866 INFO L82 PathProgramCache]: Analyzing trace with hash -321352736, now seen corresponding path program 124 times [2018-10-01 00:03:42,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:42,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:42,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:42,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:42,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:48,895 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:48,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:48,903 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:03:48,983 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:03:48,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:48,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:49,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:49,042 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 126 [2018-10-01 00:03:49,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-10-01 00:03:49,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-10-01 00:03:49,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-10-01 00:03:49,043 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 127 states. [2018-10-01 00:03:49,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:49,469 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-01 00:03:49,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-10-01 00:03:49,469 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 127 [2018-10-01 00:03:49,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:49,470 INFO L225 Difference]: With dead ends: 131 [2018-10-01 00:03:49,470 INFO L226 Difference]: Without dead ends: 129 [2018-10-01 00:03:49,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-10-01 00:03:49,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-01 00:03:49,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-01 00:03:49,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-01 00:03:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-10-01 00:03:49,474 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 127 [2018-10-01 00:03:49,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:49,474 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-10-01 00:03:49,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-10-01 00:03:49,474 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-10-01 00:03:49,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-01 00:03:49,475 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:49,475 INFO L375 BasicCegarLoop]: trace histogram [125, 1, 1, 1] [2018-10-01 00:03:49,475 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:49,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:49,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1372004090, now seen corresponding path program 125 times [2018-10-01 00:03:49,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:49,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:49,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:49,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:49,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:55,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:55,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:55,357 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:03:55,497 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-10-01 00:03:55,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:55,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:55,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:55,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 127 [2018-10-01 00:03:55,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-10-01 00:03:55,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-10-01 00:03:55,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-10-01 00:03:55,549 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 128 states. [2018-10-01 00:03:55,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:55,954 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-10-01 00:03:55,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-01 00:03:55,955 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 128 [2018-10-01 00:03:55,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:55,956 INFO L225 Difference]: With dead ends: 132 [2018-10-01 00:03:55,956 INFO L226 Difference]: Without dead ends: 130 [2018-10-01 00:03:55,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-10-01 00:03:55,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-01 00:03:55,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-10-01 00:03:55,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-01 00:03:55,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-10-01 00:03:55,960 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 128 [2018-10-01 00:03:55,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:55,960 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-10-01 00:03:55,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-10-01 00:03:55,961 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-10-01 00:03:55,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-01 00:03:55,961 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:55,961 INFO L375 BasicCegarLoop]: trace histogram [126, 1, 1, 1] [2018-10-01 00:03:55,961 INFO L423 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:55,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:55,962 INFO L82 PathProgramCache]: Analyzing trace with hash 417542304, now seen corresponding path program 126 times [2018-10-01 00:03:55,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:55,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:55,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:55,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:55,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:01,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:01,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:01,818 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:04:01,946 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2018-10-01 00:04:01,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:01,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:01,995 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:01,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 128 [2018-10-01 00:04:01,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-10-01 00:04:01,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-10-01 00:04:01,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-10-01 00:04:01,997 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 129 states. [2018-10-01 00:04:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:02,376 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-01 00:04:02,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-10-01 00:04:02,376 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 129 [2018-10-01 00:04:02,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:02,377 INFO L225 Difference]: With dead ends: 133 [2018-10-01 00:04:02,377 INFO L226 Difference]: Without dead ends: 131 [2018-10-01 00:04:02,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-10-01 00:04:02,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-01 00:04:02,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-01 00:04:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-01 00:04:02,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-01 00:04:02,381 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 129 [2018-10-01 00:04:02,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:02,381 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-01 00:04:02,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-10-01 00:04:02,381 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-01 00:04:02,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-01 00:04:02,382 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:02,382 INFO L375 BasicCegarLoop]: trace histogram [127, 1, 1, 1] [2018-10-01 00:04:02,382 INFO L423 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:02,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:02,382 INFO L82 PathProgramCache]: Analyzing trace with hash 58905670, now seen corresponding path program 127 times [2018-10-01 00:04:02,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:02,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:02,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:02,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:02,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:08,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:08,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:08,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:08,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:08,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:08,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 129 [2018-10-01 00:04:08,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-10-01 00:04:08,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-10-01 00:04:08,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-10-01 00:04:08,482 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 130 states. [2018-10-01 00:04:08,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:08,912 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-10-01 00:04:08,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-10-01 00:04:08,913 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 130 [2018-10-01 00:04:08,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:08,914 INFO L225 Difference]: With dead ends: 134 [2018-10-01 00:04:08,914 INFO L226 Difference]: Without dead ends: 132 [2018-10-01 00:04:08,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-10-01 00:04:08,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-01 00:04:08,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-10-01 00:04:08,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-10-01 00:04:08,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-10-01 00:04:08,919 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 130 [2018-10-01 00:04:08,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:08,919 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-10-01 00:04:08,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-10-01 00:04:08,919 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-10-01 00:04:08,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-01 00:04:08,920 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:08,920 INFO L375 BasicCegarLoop]: trace histogram [128, 1, 1, 1] [2018-10-01 00:04:08,920 INFO L423 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:08,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:08,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1826071904, now seen corresponding path program 128 times [2018-10-01 00:04:08,921 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:08,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:08,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:08,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:08,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:15,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:15,078 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:15,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:15,086 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:04:15,156 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:04:15,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:15,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:15,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:15,206 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:15,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 130 [2018-10-01 00:04:15,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-10-01 00:04:15,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-10-01 00:04:15,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-10-01 00:04:15,208 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 131 states. [2018-10-01 00:04:15,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:15,546 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-01 00:04:15,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-10-01 00:04:15,546 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 131 [2018-10-01 00:04:15,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:15,547 INFO L225 Difference]: With dead ends: 135 [2018-10-01 00:04:15,547 INFO L226 Difference]: Without dead ends: 133 [2018-10-01 00:04:15,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-10-01 00:04:15,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-01 00:04:15,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-01 00:04:15,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-01 00:04:15,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-10-01 00:04:15,552 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 131 [2018-10-01 00:04:15,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:15,552 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-10-01 00:04:15,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-10-01 00:04:15,552 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-10-01 00:04:15,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-01 00:04:15,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:15,553 INFO L375 BasicCegarLoop]: trace histogram [129, 1, 1, 1] [2018-10-01 00:04:15,553 INFO L423 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:15,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:15,553 INFO L82 PathProgramCache]: Analyzing trace with hash 773650310, now seen corresponding path program 129 times [2018-10-01 00:04:15,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:15,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:15,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:15,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:15,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:21,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:21,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:21,853 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:04:22,008 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-10-01 00:04:22,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:22,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:22,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:22,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 131 [2018-10-01 00:04:22,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-10-01 00:04:22,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-10-01 00:04:22,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-10-01 00:04:22,061 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 132 states. [2018-10-01 00:04:22,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:22,325 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-10-01 00:04:22,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-10-01 00:04:22,325 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 132 [2018-10-01 00:04:22,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:22,326 INFO L225 Difference]: With dead ends: 136 [2018-10-01 00:04:22,326 INFO L226 Difference]: Without dead ends: 134 [2018-10-01 00:04:22,327 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-10-01 00:04:22,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-01 00:04:22,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-10-01 00:04:22,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-01 00:04:22,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-10-01 00:04:22,330 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 132 [2018-10-01 00:04:22,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:22,330 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-10-01 00:04:22,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-10-01 00:04:22,330 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-10-01 00:04:22,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-01 00:04:22,331 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:22,331 INFO L375 BasicCegarLoop]: trace histogram [130, 1, 1, 1] [2018-10-01 00:04:22,331 INFO L423 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:22,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:22,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1786648032, now seen corresponding path program 130 times [2018-10-01 00:04:22,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:22,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:22,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:22,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:22,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:28,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:28,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:28,652 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:28,659 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:04:28,744 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:04:28,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:28,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:28,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:28,795 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:28,795 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 132 [2018-10-01 00:04:28,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-10-01 00:04:28,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-10-01 00:04:28,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-10-01 00:04:28,797 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 133 states. [2018-10-01 00:04:29,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:29,102 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-01 00:04:29,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-10-01 00:04:29,102 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 133 [2018-10-01 00:04:29,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:29,103 INFO L225 Difference]: With dead ends: 137 [2018-10-01 00:04:29,103 INFO L226 Difference]: Without dead ends: 135 [2018-10-01 00:04:29,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-10-01 00:04:29,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-01 00:04:29,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-01 00:04:29,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-01 00:04:29,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-10-01 00:04:29,105 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 133 [2018-10-01 00:04:29,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:29,106 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-10-01 00:04:29,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-10-01 00:04:29,106 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-10-01 00:04:29,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-01 00:04:29,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:29,106 INFO L375 BasicCegarLoop]: trace histogram [131, 1, 1, 1] [2018-10-01 00:04:29,106 INFO L423 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:29,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:29,107 INFO L82 PathProgramCache]: Analyzing trace with hash 448481990, now seen corresponding path program 131 times [2018-10-01 00:04:29,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:29,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:29,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:29,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:29,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:35,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:35,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:35,718 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:04:35,871 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-10-01 00:04:35,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:35,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:35,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:35,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:35,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 133 [2018-10-01 00:04:35,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-10-01 00:04:35,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-10-01 00:04:35,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-10-01 00:04:35,940 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 134 states. [2018-10-01 00:04:36,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:36,326 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-10-01 00:04:36,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-10-01 00:04:36,326 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 134 [2018-10-01 00:04:36,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:36,327 INFO L225 Difference]: With dead ends: 138 [2018-10-01 00:04:36,327 INFO L226 Difference]: Without dead ends: 136 [2018-10-01 00:04:36,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-10-01 00:04:36,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-01 00:04:36,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-10-01 00:04:36,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-01 00:04:36,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-01 00:04:36,330 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 134 [2018-10-01 00:04:36,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:36,330 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-01 00:04:36,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-10-01 00:04:36,330 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-01 00:04:36,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-01 00:04:36,331 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:36,331 INFO L375 BasicCegarLoop]: trace histogram [132, 1, 1, 1] [2018-10-01 00:04:36,331 INFO L423 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:36,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:36,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1018035936, now seen corresponding path program 132 times [2018-10-01 00:04:36,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:36,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:36,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:36,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:36,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:42,801 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:42,801 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:42,808 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:04:42,950 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-01 00:04:42,951 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:42,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:43,016 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:43,016 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 134 [2018-10-01 00:04:43,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-10-01 00:04:43,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-10-01 00:04:43,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-10-01 00:04:43,018 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 135 states. [2018-10-01 00:04:43,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:43,481 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-01 00:04:43,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-10-01 00:04:43,481 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 135 [2018-10-01 00:04:43,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:43,482 INFO L225 Difference]: With dead ends: 139 [2018-10-01 00:04:43,482 INFO L226 Difference]: Without dead ends: 137 [2018-10-01 00:04:43,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-10-01 00:04:43,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-01 00:04:43,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-01 00:04:43,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-01 00:04:43,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-01 00:04:43,485 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 135 [2018-10-01 00:04:43,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:43,485 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-01 00:04:43,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-10-01 00:04:43,485 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-01 00:04:43,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-01 00:04:43,486 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:43,486 INFO L375 BasicCegarLoop]: trace histogram [133, 1, 1, 1] [2018-10-01 00:04:43,486 INFO L423 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:43,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:43,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1494339078, now seen corresponding path program 133 times [2018-10-01 00:04:43,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:43,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:43,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:43,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:43,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:50,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:50,216 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:50,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:50,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:50,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:50,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:50,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135] total 135 [2018-10-01 00:04:50,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-10-01 00:04:50,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-10-01 00:04:50,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-10-01 00:04:50,351 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 136 states. [2018-10-01 00:04:50,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:50,763 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2018-10-01 00:04:50,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-10-01 00:04:50,763 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 136 [2018-10-01 00:04:50,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:50,764 INFO L225 Difference]: With dead ends: 140 [2018-10-01 00:04:50,764 INFO L226 Difference]: Without dead ends: 138 [2018-10-01 00:04:50,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-10-01 00:04:50,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-01 00:04:50,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-10-01 00:04:50,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-01 00:04:50,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-10-01 00:04:50,767 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 136 [2018-10-01 00:04:50,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:50,768 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-10-01 00:04:50,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-10-01 00:04:50,768 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-10-01 00:04:50,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-01 00:04:50,768 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:50,768 INFO L375 BasicCegarLoop]: trace histogram [134, 1, 1, 1] [2018-10-01 00:04:50,768 INFO L423 AbstractCegarLoop]: === Iteration 135 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:50,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:50,769 INFO L82 PathProgramCache]: Analyzing trace with hash -920132704, now seen corresponding path program 134 times [2018-10-01 00:04:50,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:50,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:50,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:50,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:50,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:57,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:57,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:57,426 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:04:57,502 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:04:57,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:57,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:57,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:57,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 136 [2018-10-01 00:04:57,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-10-01 00:04:57,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-10-01 00:04:57,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-10-01 00:04:57,556 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 137 states. [2018-10-01 00:04:57,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:57,870 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-01 00:04:57,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-10-01 00:04:57,871 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 137 [2018-10-01 00:04:57,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:57,871 INFO L225 Difference]: With dead ends: 141 [2018-10-01 00:04:57,871 INFO L226 Difference]: Without dead ends: 139 [2018-10-01 00:04:57,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-10-01 00:04:57,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-01 00:04:57,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-01 00:04:57,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-01 00:04:57,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-10-01 00:04:57,875 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 137 [2018-10-01 00:04:57,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:57,875 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-10-01 00:04:57,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-10-01 00:04:57,876 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-10-01 00:04:57,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-01 00:04:57,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:57,876 INFO L375 BasicCegarLoop]: trace histogram [135, 1, 1, 1] [2018-10-01 00:04:57,876 INFO L423 AbstractCegarLoop]: === Iteration 136 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:57,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:57,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1540653382, now seen corresponding path program 135 times [2018-10-01 00:04:57,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:57,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:57,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:57,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:57,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:04,558 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:04,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:04,566 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:05:04,729 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-10-01 00:05:04,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:04,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:04,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:04,782 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137] total 137 [2018-10-01 00:05:04,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-10-01 00:05:04,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-10-01 00:05:04,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-10-01 00:05:04,784 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 138 states. [2018-10-01 00:05:05,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:05,221 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-10-01 00:05:05,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-10-01 00:05:05,221 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 138 [2018-10-01 00:05:05,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:05,222 INFO L225 Difference]: With dead ends: 142 [2018-10-01 00:05:05,222 INFO L226 Difference]: Without dead ends: 140 [2018-10-01 00:05:05,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-10-01 00:05:05,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-01 00:05:05,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-10-01 00:05:05,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-01 00:05:05,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-10-01 00:05:05,226 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 138 [2018-10-01 00:05:05,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:05,227 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-10-01 00:05:05,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-10-01 00:05:05,227 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-10-01 00:05:05,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-01 00:05:05,227 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:05,228 INFO L375 BasicCegarLoop]: trace histogram [136, 1, 1, 1] [2018-10-01 00:05:05,228 INFO L423 AbstractCegarLoop]: === Iteration 137 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:05,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:05,228 INFO L82 PathProgramCache]: Analyzing trace with hash 515610720, now seen corresponding path program 136 times [2018-10-01 00:05:05,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:05,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:05,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:05,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:05,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:11,906 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:11,906 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:11,913 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:05:12,000 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:05:12,000 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:12,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:12,065 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:12,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 138] total 138 [2018-10-01 00:05:12,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-10-01 00:05:12,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-10-01 00:05:12,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-10-01 00:05:12,067 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 139 states. [2018-10-01 00:05:12,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:12,523 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-01 00:05:12,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-10-01 00:05:12,524 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 139 [2018-10-01 00:05:12,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:12,524 INFO L225 Difference]: With dead ends: 143 [2018-10-01 00:05:12,525 INFO L226 Difference]: Without dead ends: 141 [2018-10-01 00:05:12,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-10-01 00:05:12,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-01 00:05:12,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-01 00:05:12,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-01 00:05:12,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-10-01 00:05:12,528 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 139 [2018-10-01 00:05:12,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:12,528 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-10-01 00:05:12,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-10-01 00:05:12,528 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-10-01 00:05:12,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-01 00:05:12,528 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:12,528 INFO L375 BasicCegarLoop]: trace histogram [137, 1, 1, 1] [2018-10-01 00:05:12,529 INFO L423 AbstractCegarLoop]: === Iteration 138 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:12,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:12,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1195940730, now seen corresponding path program 137 times [2018-10-01 00:05:12,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:12,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:12,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:12,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:12,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:19,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:19,454 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:19,462 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:05:19,622 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2018-10-01 00:05:19,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:19,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:19,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:19,675 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139] total 139 [2018-10-01 00:05:19,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-10-01 00:05:19,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-10-01 00:05:19,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-10-01 00:05:19,676 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 140 states. [2018-10-01 00:05:20,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:20,064 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2018-10-01 00:05:20,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-10-01 00:05:20,064 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 140 [2018-10-01 00:05:20,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:20,064 INFO L225 Difference]: With dead ends: 144 [2018-10-01 00:05:20,064 INFO L226 Difference]: Without dead ends: 142 [2018-10-01 00:05:20,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-10-01 00:05:20,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-10-01 00:05:20,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-10-01 00:05:20,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-01 00:05:20,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-10-01 00:05:20,068 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 140 [2018-10-01 00:05:20,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:20,068 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-10-01 00:05:20,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-10-01 00:05:20,068 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-10-01 00:05:20,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-01 00:05:20,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:20,068 INFO L375 BasicCegarLoop]: trace histogram [138, 1, 1, 1] [2018-10-01 00:05:20,069 INFO L423 AbstractCegarLoop]: === Iteration 139 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:20,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:20,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1580539168, now seen corresponding path program 138 times [2018-10-01 00:05:20,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:20,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:20,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:20,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:20,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:27,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:27,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:27,516 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:05:27,666 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2018-10-01 00:05:27,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:27,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:27,720 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:27,720 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 140] total 140 [2018-10-01 00:05:27,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-10-01 00:05:27,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-10-01 00:05:27,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-10-01 00:05:27,722 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 141 states. [2018-10-01 00:05:28,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:28,200 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-01 00:05:28,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-10-01 00:05:28,200 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 141 [2018-10-01 00:05:28,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:28,201 INFO L225 Difference]: With dead ends: 145 [2018-10-01 00:05:28,201 INFO L226 Difference]: Without dead ends: 143 [2018-10-01 00:05:28,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-10-01 00:05:28,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-01 00:05:28,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-01 00:05:28,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-01 00:05:28,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-01 00:05:28,205 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 141 [2018-10-01 00:05:28,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:28,205 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-01 00:05:28,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-10-01 00:05:28,206 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-01 00:05:28,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-01 00:05:28,206 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:28,206 INFO L375 BasicCegarLoop]: trace histogram [139, 1, 1, 1] [2018-10-01 00:05:28,206 INFO L423 AbstractCegarLoop]: === Iteration 140 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:28,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:28,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1752070086, now seen corresponding path program 139 times [2018-10-01 00:05:28,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:28,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:28,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:28,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:28,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:35,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:35,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:35,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:35,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:35,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:35,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:35,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 141] total 141 [2018-10-01 00:05:35,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-10-01 00:05:35,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-10-01 00:05:35,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-10-01 00:05:35,505 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 142 states. [2018-10-01 00:05:35,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:35,981 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-10-01 00:05:35,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-10-01 00:05:35,982 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 142 [2018-10-01 00:05:35,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:35,982 INFO L225 Difference]: With dead ends: 146 [2018-10-01 00:05:35,982 INFO L226 Difference]: Without dead ends: 144 [2018-10-01 00:05:35,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-10-01 00:05:35,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-01 00:05:35,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-10-01 00:05:35,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-01 00:05:35,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-10-01 00:05:35,985 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 142 [2018-10-01 00:05:35,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:35,985 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-10-01 00:05:35,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-10-01 00:05:35,985 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-10-01 00:05:35,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-01 00:05:35,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:35,985 INFO L375 BasicCegarLoop]: trace histogram [140, 1, 1, 1] [2018-10-01 00:05:35,986 INFO L423 AbstractCegarLoop]: === Iteration 141 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:35,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:35,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1520406048, now seen corresponding path program 140 times [2018-10-01 00:05:35,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:35,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:35,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:35,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:35,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:43,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:43,113 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:43,120 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:05:43,210 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:05:43,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:43,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:43,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:43,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142, 142] total 142 [2018-10-01 00:05:43,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-10-01 00:05:43,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-10-01 00:05:43,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-10-01 00:05:43,264 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 143 states. [2018-10-01 00:05:43,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:43,602 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-01 00:05:43,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-10-01 00:05:43,602 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 143 [2018-10-01 00:05:43,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:43,603 INFO L225 Difference]: With dead ends: 147 [2018-10-01 00:05:43,603 INFO L226 Difference]: Without dead ends: 145 [2018-10-01 00:05:43,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-10-01 00:05:43,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-01 00:05:43,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-01 00:05:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-01 00:05:43,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-10-01 00:05:43,607 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 143 [2018-10-01 00:05:43,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:43,607 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-10-01 00:05:43,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-10-01 00:05:43,607 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-10-01 00:05:43,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-01 00:05:43,607 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:43,608 INFO L375 BasicCegarLoop]: trace histogram [141, 1, 1, 1] [2018-10-01 00:05:43,608 INFO L423 AbstractCegarLoop]: === Iteration 142 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:43,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:43,608 INFO L82 PathProgramCache]: Analyzing trace with hash 112048902, now seen corresponding path program 141 times [2018-10-01 00:05:43,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:43,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:43,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:43,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:43,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:50,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:50,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:50,825 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:05:51,002 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2018-10-01 00:05:51,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:51,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:51,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:51,055 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:51,055 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143, 143] total 143 [2018-10-01 00:05:51,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-10-01 00:05:51,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-10-01 00:05:51,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-10-01 00:05:51,057 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 144 states. [2018-10-01 00:05:51,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:51,582 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-10-01 00:05:51,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-01 00:05:51,582 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 144 [2018-10-01 00:05:51,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:51,583 INFO L225 Difference]: With dead ends: 148 [2018-10-01 00:05:51,583 INFO L226 Difference]: Without dead ends: 146 [2018-10-01 00:05:51,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-10-01 00:05:51,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-01 00:05:51,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-10-01 00:05:51,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-01 00:05:51,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-10-01 00:05:51,586 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 144 [2018-10-01 00:05:51,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:51,587 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-10-01 00:05:51,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-10-01 00:05:51,587 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-10-01 00:05:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-01 00:05:51,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:51,587 INFO L375 BasicCegarLoop]: trace histogram [142, 1, 1, 1] [2018-10-01 00:05:51,587 INFO L423 AbstractCegarLoop]: === Iteration 143 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:51,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:51,588 INFO L82 PathProgramCache]: Analyzing trace with hash -821455200, now seen corresponding path program 142 times [2018-10-01 00:05:51,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:51,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:51,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:51,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:51,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:58,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:58,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:58,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:58,945 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:05:59,047 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:05:59,048 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:59,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:59,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:59,124 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144, 144] total 144 [2018-10-01 00:05:59,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-10-01 00:05:59,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-10-01 00:05:59,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-10-01 00:05:59,126 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 145 states. [2018-10-01 00:05:59,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:59,457 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-01 00:05:59,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-10-01 00:05:59,460 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 145 [2018-10-01 00:05:59,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:59,461 INFO L225 Difference]: With dead ends: 149 [2018-10-01 00:05:59,461 INFO L226 Difference]: Without dead ends: 147 [2018-10-01 00:05:59,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-10-01 00:05:59,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-01 00:05:59,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-01 00:05:59,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-01 00:05:59,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-01 00:05:59,464 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 145 [2018-10-01 00:05:59,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:59,464 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-01 00:05:59,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-10-01 00:05:59,464 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-01 00:05:59,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-01 00:05:59,465 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:59,465 INFO L375 BasicCegarLoop]: trace histogram [143, 1, 1, 1] [2018-10-01 00:05:59,465 INFO L423 AbstractCegarLoop]: === Iteration 144 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:59,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:59,465 INFO L82 PathProgramCache]: Analyzing trace with hash 304688710, now seen corresponding path program 143 times [2018-10-01 00:05:59,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:59,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:59,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:59,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:59,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:07,255 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:07,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:07,262 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:06:07,435 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-10-01 00:06:07,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:07,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:07,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:07,491 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:07,491 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 145] total 145 [2018-10-01 00:06:07,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-10-01 00:06:07,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-10-01 00:06:07,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-10-01 00:06:07,493 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 146 states. [2018-10-01 00:06:07,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:07,995 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2018-10-01 00:06:07,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-10-01 00:06:07,995 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 146 [2018-10-01 00:06:07,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:07,996 INFO L225 Difference]: With dead ends: 150 [2018-10-01 00:06:07,996 INFO L226 Difference]: Without dead ends: 148 [2018-10-01 00:06:07,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-10-01 00:06:07,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-01 00:06:07,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-10-01 00:06:08,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-01 00:06:08,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-01 00:06:08,000 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 146 [2018-10-01 00:06:08,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:08,000 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-01 00:06:08,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-10-01 00:06:08,001 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-01 00:06:08,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-01 00:06:08,001 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:08,001 INFO L375 BasicCegarLoop]: trace histogram [144, 1, 1, 1] [2018-10-01 00:06:08,001 INFO L423 AbstractCegarLoop]: === Iteration 145 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:08,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:08,001 INFO L82 PathProgramCache]: Analyzing trace with hash 855411552, now seen corresponding path program 144 times [2018-10-01 00:06:08,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:08,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:08,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:08,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:08,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:15,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:15,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:15,470 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:06:15,630 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-01 00:06:15,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:15,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:15,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:15,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 146] total 146 [2018-10-01 00:06:15,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-10-01 00:06:15,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-10-01 00:06:15,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-10-01 00:06:15,700 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 147 states. [2018-10-01 00:06:16,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:16,146 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-01 00:06:16,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-10-01 00:06:16,146 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 147 [2018-10-01 00:06:16,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:16,147 INFO L225 Difference]: With dead ends: 151 [2018-10-01 00:06:16,147 INFO L226 Difference]: Without dead ends: 149 [2018-10-01 00:06:16,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-10-01 00:06:16,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-01 00:06:16,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-01 00:06:16,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-01 00:06:16,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-10-01 00:06:16,150 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 147 [2018-10-01 00:06:16,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:16,150 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-10-01 00:06:16,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-10-01 00:06:16,151 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-10-01 00:06:16,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-01 00:06:16,151 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:16,151 INFO L375 BasicCegarLoop]: trace histogram [145, 1, 1, 1] [2018-10-01 00:06:16,151 INFO L423 AbstractCegarLoop]: === Iteration 146 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:16,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:16,151 INFO L82 PathProgramCache]: Analyzing trace with hash 747950470, now seen corresponding path program 145 times [2018-10-01 00:06:16,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:16,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:16,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:16,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:16,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:24,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:24,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:24,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:24,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:24,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:24,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 147] total 147 [2018-10-01 00:06:24,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-10-01 00:06:24,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-10-01 00:06:24,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-10-01 00:06:24,173 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 148 states. [2018-10-01 00:06:24,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:24,683 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2018-10-01 00:06:24,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-10-01 00:06:24,683 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 148 [2018-10-01 00:06:24,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:24,684 INFO L225 Difference]: With dead ends: 152 [2018-10-01 00:06:24,684 INFO L226 Difference]: Without dead ends: 150 [2018-10-01 00:06:24,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-10-01 00:06:24,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-01 00:06:24,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-10-01 00:06:24,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-01 00:06:24,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-10-01 00:06:24,688 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 148 [2018-10-01 00:06:24,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:24,688 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-10-01 00:06:24,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-10-01 00:06:24,688 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-10-01 00:06:24,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-01 00:06:24,689 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:24,689 INFO L375 BasicCegarLoop]: trace histogram [146, 1, 1, 1] [2018-10-01 00:06:24,689 INFO L423 AbstractCegarLoop]: === Iteration 147 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:24,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:24,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1711624224, now seen corresponding path program 146 times [2018-10-01 00:06:24,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:24,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:24,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:24,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:24,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:32,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:32,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:32,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:32,705 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:06:32,786 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:06:32,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:32,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:32,842 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:32,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148, 148] total 148 [2018-10-01 00:06:32,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-10-01 00:06:32,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-10-01 00:06:32,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-10-01 00:06:32,844 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 149 states. [2018-10-01 00:06:33,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:33,458 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-01 00:06:33,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-10-01 00:06:33,458 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 149 [2018-10-01 00:06:33,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:33,459 INFO L225 Difference]: With dead ends: 153 [2018-10-01 00:06:33,459 INFO L226 Difference]: Without dead ends: 151 [2018-10-01 00:06:33,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-10-01 00:06:33,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-01 00:06:33,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-01 00:06:33,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-01 00:06:33,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-10-01 00:06:33,463 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 149 [2018-10-01 00:06:33,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:33,463 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-10-01 00:06:33,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-10-01 00:06:33,463 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-10-01 00:06:33,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-01 00:06:33,463 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:33,463 INFO L375 BasicCegarLoop]: trace histogram [147, 1, 1, 1] [2018-10-01 00:06:33,464 INFO L423 AbstractCegarLoop]: === Iteration 148 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:33,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:33,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1520739526, now seen corresponding path program 147 times [2018-10-01 00:06:33,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:33,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:33,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:33,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:33,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:41,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:41,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:41,211 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:06:41,398 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2018-10-01 00:06:41,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:41,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:41,455 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:41,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149, 149] total 149 [2018-10-01 00:06:41,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-10-01 00:06:41,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-10-01 00:06:41,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-10-01 00:06:41,457 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 150 states. [2018-10-01 00:06:41,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:41,787 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-10-01 00:06:41,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-10-01 00:06:41,787 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 150 [2018-10-01 00:06:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:41,788 INFO L225 Difference]: With dead ends: 154 [2018-10-01 00:06:41,788 INFO L226 Difference]: Without dead ends: 152 [2018-10-01 00:06:41,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-10-01 00:06:41,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-01 00:06:41,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-10-01 00:06:41,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-01 00:06:41,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-10-01 00:06:41,792 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 150 [2018-10-01 00:06:41,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:41,792 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-10-01 00:06:41,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-10-01 00:06:41,792 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-10-01 00:06:41,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-01 00:06:41,792 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:41,793 INFO L375 BasicCegarLoop]: trace histogram [148, 1, 1, 1] [2018-10-01 00:06:41,793 INFO L423 AbstractCegarLoop]: === Iteration 149 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:41,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:41,793 INFO L82 PathProgramCache]: Analyzing trace with hash -101718816, now seen corresponding path program 148 times [2018-10-01 00:06:41,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:41,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:41,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:41,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:41,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:50,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:50,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:50,141 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:06:50,238 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:06:50,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:50,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:50,297 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:50,297 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [150, 150] total 150 [2018-10-01 00:06:50,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 151 states [2018-10-01 00:06:50,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2018-10-01 00:06:50,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-10-01 00:06:50,299 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 151 states. [2018-10-01 00:06:50,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:50,807 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-01 00:06:50,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-10-01 00:06:50,808 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 151 [2018-10-01 00:06:50,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:50,809 INFO L225 Difference]: With dead ends: 155 [2018-10-01 00:06:50,809 INFO L226 Difference]: Without dead ends: 153 [2018-10-01 00:06:50,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-10-01 00:06:50,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-01 00:06:50,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-01 00:06:50,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-01 00:06:50,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-10-01 00:06:50,812 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 151 [2018-10-01 00:06:50,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:50,812 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-10-01 00:06:50,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 151 states. [2018-10-01 00:06:50,812 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-10-01 00:06:50,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-01 00:06:50,813 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:50,813 INFO L375 BasicCegarLoop]: trace histogram [149, 1, 1, 1] [2018-10-01 00:06:50,813 INFO L423 AbstractCegarLoop]: === Iteration 150 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:50,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:50,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1141680134, now seen corresponding path program 149 times [2018-10-01 00:06:50,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:50,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:50,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:50,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:50,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:59,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:59,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:59,206 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:59,212 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:06:59,391 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) [2018-10-01 00:06:59,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:59,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:59,428 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:59,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:59,448 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 151] total 151 [2018-10-01 00:06:59,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-10-01 00:06:59,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-10-01 00:06:59,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-10-01 00:06:59,450 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 152 states. [2018-10-01 00:07:00,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:00,086 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2018-10-01 00:07:00,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-10-01 00:07:00,087 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 152 [2018-10-01 00:07:00,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:00,087 INFO L225 Difference]: With dead ends: 156 [2018-10-01 00:07:00,087 INFO L226 Difference]: Without dead ends: 154 [2018-10-01 00:07:00,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-10-01 00:07:00,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-01 00:07:00,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-10-01 00:07:00,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-01 00:07:00,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-10-01 00:07:00,090 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 152 [2018-10-01 00:07:00,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:00,090 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-10-01 00:07:00,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-10-01 00:07:00,090 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-10-01 00:07:00,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-01 00:07:00,091 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:00,091 INFO L375 BasicCegarLoop]: trace histogram [150, 1, 1, 1] [2018-10-01 00:07:00,091 INFO L423 AbstractCegarLoop]: === Iteration 151 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:00,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:00,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1032341920, now seen corresponding path program 150 times [2018-10-01 00:07:00,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:00,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:00,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:00,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:00,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 0 proven. 11325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:08,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:08,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:08,351 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:07:08,527 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 76 check-sat command(s) [2018-10-01 00:07:08,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:08,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 0 proven. 11325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:08,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:08,585 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [152, 152] total 152 [2018-10-01 00:07:08,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 153 states [2018-10-01 00:07:08,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2018-10-01 00:07:08,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-10-01 00:07:08,587 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 153 states. [2018-10-01 00:07:09,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:09,164 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-01 00:07:09,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-10-01 00:07:09,165 INFO L78 Accepts]: Start accepts. Automaton has 153 states. Word has length 153 [2018-10-01 00:07:09,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:09,166 INFO L225 Difference]: With dead ends: 157 [2018-10-01 00:07:09,166 INFO L226 Difference]: Without dead ends: 155 [2018-10-01 00:07:09,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-10-01 00:07:09,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-01 00:07:09,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-01 00:07:09,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-01 00:07:09,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-01 00:07:09,170 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 153 [2018-10-01 00:07:09,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:09,171 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-01 00:07:09,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 153 states. [2018-10-01 00:07:09,171 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-01 00:07:09,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-01 00:07:09,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:09,172 INFO L375 BasicCegarLoop]: trace histogram [151, 1, 1, 1] [2018-10-01 00:07:09,172 INFO L423 AbstractCegarLoop]: === Iteration 152 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:09,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:09,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1937824582, now seen corresponding path program 151 times [2018-10-01 00:07:09,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:09,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:09,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:09,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:09,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:17,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:17,414 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:17,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:17,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:17,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:17,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [153, 153] total 153 [2018-10-01 00:07:17,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-10-01 00:07:17,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-10-01 00:07:17,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-10-01 00:07:17,578 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 154 states. [2018-10-01 00:07:17,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:17,920 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-10-01 00:07:17,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-10-01 00:07:17,921 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 154 [2018-10-01 00:07:17,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:17,921 INFO L225 Difference]: With dead ends: 158 [2018-10-01 00:07:17,921 INFO L226 Difference]: Without dead ends: 156 [2018-10-01 00:07:17,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-10-01 00:07:17,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-01 00:07:17,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-01 00:07:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-01 00:07:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-10-01 00:07:17,925 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 154 [2018-10-01 00:07:17,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:17,925 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-10-01 00:07:17,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-10-01 00:07:17,925 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-10-01 00:07:17,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-01 00:07:17,926 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:17,926 INFO L375 BasicCegarLoop]: trace histogram [152, 1, 1, 1] [2018-10-01 00:07:17,926 INFO L423 AbstractCegarLoop]: === Iteration 153 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:17,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:17,926 INFO L82 PathProgramCache]: Analyzing trace with hash -56983968, now seen corresponding path program 152 times [2018-10-01 00:07:17,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:17,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:17,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:17,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:17,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 0 proven. 11628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:26,551 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:26,551 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:26,558 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:07:26,642 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:07:26,642 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:26,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 0 proven. 11628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:26,699 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:26,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [154, 154] total 154 [2018-10-01 00:07:26,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 155 states [2018-10-01 00:07:26,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2018-10-01 00:07:26,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-10-01 00:07:26,701 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 155 states. [2018-10-01 00:07:27,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:27,176 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-01 00:07:27,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-10-01 00:07:27,176 INFO L78 Accepts]: Start accepts. Automaton has 155 states. Word has length 155 [2018-10-01 00:07:27,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:27,177 INFO L225 Difference]: With dead ends: 159 [2018-10-01 00:07:27,178 INFO L226 Difference]: Without dead ends: 157 [2018-10-01 00:07:27,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-10-01 00:07:27,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-01 00:07:27,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-01 00:07:27,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-01 00:07:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-10-01 00:07:27,181 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 155 [2018-10-01 00:07:27,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:27,181 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-10-01 00:07:27,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 155 states. [2018-10-01 00:07:27,181 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-10-01 00:07:27,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-01 00:07:27,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:27,181 INFO L375 BasicCegarLoop]: trace histogram [153, 1, 1, 1] [2018-10-01 00:07:27,182 INFO L423 AbstractCegarLoop]: === Iteration 154 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:27,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:27,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1766506874, now seen corresponding path program 153 times [2018-10-01 00:07:27,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:27,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:27,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:27,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:27,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:35,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:35,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:35,785 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:07:35,984 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 78 check-sat command(s) [2018-10-01 00:07:35,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:35,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:36,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:36,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [155, 155] total 155 [2018-10-01 00:07:36,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-10-01 00:07:36,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-10-01 00:07:36,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-10-01 00:07:36,044 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 156 states. [2018-10-01 00:07:36,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:36,678 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2018-10-01 00:07:36,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-10-01 00:07:36,678 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 156 [2018-10-01 00:07:36,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:36,679 INFO L225 Difference]: With dead ends: 160 [2018-10-01 00:07:36,679 INFO L226 Difference]: Without dead ends: 158 [2018-10-01 00:07:36,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-10-01 00:07:36,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-01 00:07:36,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-10-01 00:07:36,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-01 00:07:36,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-01 00:07:36,681 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 156 [2018-10-01 00:07:36,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:36,682 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-01 00:07:36,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-10-01 00:07:36,682 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-01 00:07:36,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-01 00:07:36,682 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:36,682 INFO L375 BasicCegarLoop]: trace histogram [154, 1, 1, 1] [2018-10-01 00:07:36,682 INFO L423 AbstractCegarLoop]: === Iteration 155 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:36,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:36,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1072857888, now seen corresponding path program 154 times [2018-10-01 00:07:36,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:36,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:36,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:36,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:36,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:45,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:45,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:45,404 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:07:45,508 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:07:45,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:45,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:45,567 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:45,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [156, 156] total 156 [2018-10-01 00:07:45,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 157 states [2018-10-01 00:07:45,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2018-10-01 00:07:45,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-10-01 00:07:45,570 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 157 states. [2018-10-01 00:07:46,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:46,251 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-01 00:07:46,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2018-10-01 00:07:46,251 INFO L78 Accepts]: Start accepts. Automaton has 157 states. Word has length 157 [2018-10-01 00:07:46,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:46,252 INFO L225 Difference]: With dead ends: 161 [2018-10-01 00:07:46,252 INFO L226 Difference]: Without dead ends: 159 [2018-10-01 00:07:46,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-10-01 00:07:46,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-01 00:07:46,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-01 00:07:46,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-01 00:07:46,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-10-01 00:07:46,256 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 157 [2018-10-01 00:07:46,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:46,257 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-10-01 00:07:46,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 157 states. [2018-10-01 00:07:46,257 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-10-01 00:07:46,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-01 00:07:46,258 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:46,258 INFO L375 BasicCegarLoop]: trace histogram [155, 1, 1, 1] [2018-10-01 00:07:46,258 INFO L423 AbstractCegarLoop]: === Iteration 156 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:46,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:46,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1101147706, now seen corresponding path program 155 times [2018-10-01 00:07:46,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:46,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:46,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:46,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:46,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:55,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:55,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:55,094 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:07:55,292 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2018-10-01 00:07:55,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:55,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:55,352 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:55,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [157, 157] total 157 [2018-10-01 00:07:55,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-10-01 00:07:55,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-10-01 00:07:55,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-10-01 00:07:55,354 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 158 states. [2018-10-01 00:07:56,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:56,066 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2018-10-01 00:07:56,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-10-01 00:07:56,067 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 158 [2018-10-01 00:07:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:56,067 INFO L225 Difference]: With dead ends: 162 [2018-10-01 00:07:56,068 INFO L226 Difference]: Without dead ends: 160 [2018-10-01 00:07:56,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-10-01 00:07:56,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-01 00:07:56,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-10-01 00:07:56,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-01 00:07:56,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-01 00:07:56,072 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 158 [2018-10-01 00:07:56,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:56,072 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-01 00:07:56,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-10-01 00:07:56,072 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-01 00:07:56,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-01 00:07:56,072 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:56,072 INFO L375 BasicCegarLoop]: trace histogram [156, 1, 1, 1] [2018-10-01 00:07:56,073 INFO L423 AbstractCegarLoop]: === Iteration 157 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:56,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:56,073 INFO L82 PathProgramCache]: Analyzing trace with hash 224155616, now seen corresponding path program 156 times [2018-10-01 00:07:56,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:56,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:56,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:56,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:56,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 0 proven. 12246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:05,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:05,260 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 00:08:05,267 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:08:05,453 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-01 00:08:05,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:05,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 0 proven. 12246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:05,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:05,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [158, 158] total 158 [2018-10-01 00:08:05,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 159 states [2018-10-01 00:08:05,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2018-10-01 00:08:05,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-10-01 00:08:05,517 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 159 states. [2018-10-01 00:08:06,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:06,250 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-01 00:08:06,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2018-10-01 00:08:06,250 INFO L78 Accepts]: Start accepts. Automaton has 159 states. Word has length 159 [2018-10-01 00:08:06,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:06,251 INFO L225 Difference]: With dead ends: 163 [2018-10-01 00:08:06,251 INFO L226 Difference]: Without dead ends: 161 [2018-10-01 00:08:06,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-10-01 00:08:06,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-01 00:08:06,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-01 00:08:06,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-01 00:08:06,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-10-01 00:08:06,253 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 159 [2018-10-01 00:08:06,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:06,254 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-10-01 00:08:06,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 159 states. [2018-10-01 00:08:06,254 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-10-01 00:08:06,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-01 00:08:06,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:06,255 INFO L375 BasicCegarLoop]: trace histogram [157, 1, 1, 1] [2018-10-01 00:08:06,255 INFO L423 AbstractCegarLoop]: === Iteration 158 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:06,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:06,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1641114362, now seen corresponding path program 157 times [2018-10-01 00:08:06,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:06,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:06,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:06,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:06,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:15,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:15,509 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 00:08:15,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:15,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:15,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:15,663 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:15,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [159, 159] total 159 [2018-10-01 00:08:15,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-10-01 00:08:15,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-10-01 00:08:15,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-10-01 00:08:15,666 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 160 states. [2018-10-01 00:08:16,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:16,450 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2018-10-01 00:08:16,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-10-01 00:08:16,450 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 160 [2018-10-01 00:08:16,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:16,451 INFO L225 Difference]: With dead ends: 164 [2018-10-01 00:08:16,451 INFO L226 Difference]: Without dead ends: 162 [2018-10-01 00:08:16,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-10-01 00:08:16,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-01 00:08:16,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-10-01 00:08:16,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-10-01 00:08:16,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-10-01 00:08:16,454 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 160 [2018-10-01 00:08:16,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:16,455 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-10-01 00:08:16,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-10-01 00:08:16,455 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-10-01 00:08:16,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-01 00:08:16,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:16,455 INFO L375 BasicCegarLoop]: trace histogram [158, 1, 1, 1] [2018-10-01 00:08:16,455 INFO L423 AbstractCegarLoop]: === Iteration 159 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:16,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:16,456 INFO L82 PathProgramCache]: Analyzing trace with hash 665058464, now seen corresponding path program 158 times [2018-10-01 00:08:16,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:16,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:16,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:16,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:16,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 0 proven. 12561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:25,889 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:25,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:08:25,897 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:08:25,986 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:08:25,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:25,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 0 proven. 12561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:26,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:26,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [160, 160] total 160 [2018-10-01 00:08:26,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 161 states [2018-10-01 00:08:26,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2018-10-01 00:08:26,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-10-01 00:08:26,047 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 161 states. [2018-10-01 00:08:26,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:26,852 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-01 00:08:26,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2018-10-01 00:08:26,853 INFO L78 Accepts]: Start accepts. Automaton has 161 states. Word has length 161 [2018-10-01 00:08:26,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:26,854 INFO L225 Difference]: With dead ends: 165 [2018-10-01 00:08:26,854 INFO L226 Difference]: Without dead ends: 163 [2018-10-01 00:08:26,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-10-01 00:08:26,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-01 00:08:26,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-01 00:08:26,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-01 00:08:26,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-10-01 00:08:26,857 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 161 [2018-10-01 00:08:26,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:26,858 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-10-01 00:08:26,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 161 states. [2018-10-01 00:08:26,858 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-10-01 00:08:26,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-01 00:08:26,858 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:26,858 INFO L375 BasicCegarLoop]: trace histogram [159, 1, 1, 1] [2018-10-01 00:08:26,858 INFO L423 AbstractCegarLoop]: === Iteration 160 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:26,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:26,859 INFO L82 PathProgramCache]: Analyzing trace with hash -858027962, now seen corresponding path program 159 times [2018-10-01 00:08:26,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:26,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:26,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:26,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:26,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:36,203 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:36,203 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 00:08:36,211 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:08:36,475 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2018-10-01 00:08:36,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:36,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:36,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:36,536 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [161, 161] total 161 [2018-10-01 00:08:36,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-10-01 00:08:36,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-10-01 00:08:36,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-10-01 00:08:36,538 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 162 states. [2018-10-01 00:08:37,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:37,375 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-10-01 00:08:37,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-10-01 00:08:37,375 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 162 [2018-10-01 00:08:37,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:37,376 INFO L225 Difference]: With dead ends: 166 [2018-10-01 00:08:37,376 INFO L226 Difference]: Without dead ends: 164 [2018-10-01 00:08:37,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-10-01 00:08:37,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-01 00:08:37,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-10-01 00:08:37,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-01 00:08:37,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-10-01 00:08:37,380 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 162 [2018-10-01 00:08:37,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:37,380 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-10-01 00:08:37,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-10-01 00:08:37,380 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-10-01 00:08:37,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-01 00:08:37,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:37,381 INFO L375 BasicCegarLoop]: trace histogram [160, 1, 1, 1] [2018-10-01 00:08:37,381 INFO L423 AbstractCegarLoop]: === Iteration 161 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:37,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:37,381 INFO L82 PathProgramCache]: Analyzing trace with hash -829066912, now seen corresponding path program 160 times [2018-10-01 00:08:37,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:37,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:37,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:37,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:37,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:46,882 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:46,882 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 00:08:46,889 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:08:47,000 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:08:47,000 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:47,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:47,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:47,060 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [162, 162] total 162 [2018-10-01 00:08:47,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 163 states [2018-10-01 00:08:47,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2018-10-01 00:08:47,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-10-01 00:08:47,062 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 163 states. [2018-10-01 00:08:47,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:47,874 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-10-01 00:08:47,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2018-10-01 00:08:47,874 INFO L78 Accepts]: Start accepts. Automaton has 163 states. Word has length 163 [2018-10-01 00:08:47,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:47,875 INFO L225 Difference]: With dead ends: 167 [2018-10-01 00:08:47,875 INFO L226 Difference]: Without dead ends: 165 [2018-10-01 00:08:47,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-10-01 00:08:47,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-01 00:08:47,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-01 00:08:47,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-01 00:08:47,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-10-01 00:08:47,880 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 163 [2018-10-01 00:08:47,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:47,880 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-10-01 00:08:47,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 163 states. [2018-10-01 00:08:47,880 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-10-01 00:08:47,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-01 00:08:47,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:47,880 INFO L375 BasicCegarLoop]: trace histogram [161, 1, 1, 1] [2018-10-01 00:08:47,881 INFO L423 AbstractCegarLoop]: === Iteration 162 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:47,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:47,881 INFO L82 PathProgramCache]: Analyzing trace with hash 68725638, now seen corresponding path program 161 times [2018-10-01 00:08:47,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:47,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:47,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:47,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:47,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:57,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:57,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:57,463 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:08:57,671 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 82 check-sat command(s) [2018-10-01 00:08:57,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:57,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:57,732 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:57,733 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [163, 163] total 163 [2018-10-01 00:08:57,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-10-01 00:08:57,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-10-01 00:08:57,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-10-01 00:08:57,735 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 164 states. [2018-10-01 00:08:58,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:58,495 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2018-10-01 00:08:58,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2018-10-01 00:08:58,495 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 164 [2018-10-01 00:08:58,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:58,496 INFO L225 Difference]: With dead ends: 168 [2018-10-01 00:08:58,496 INFO L226 Difference]: Without dead ends: 166 [2018-10-01 00:08:58,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-10-01 00:08:58,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-01 00:08:58,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-10-01 00:08:58,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-01 00:08:58,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-10-01 00:08:58,501 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 164 [2018-10-01 00:08:58,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:58,501 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-10-01 00:08:58,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-10-01 00:08:58,501 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-10-01 00:08:58,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-01 00:08:58,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:58,502 INFO L375 BasicCegarLoop]: trace histogram [162, 1, 1, 1] [2018-10-01 00:08:58,502 INFO L423 AbstractCegarLoop]: === Iteration 163 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:58,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:58,503 INFO L82 PathProgramCache]: Analyzing trace with hash 2130490912, now seen corresponding path program 162 times [2018-10-01 00:08:58,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:58,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:58,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:58,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:58,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 0 proven. 13203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:08,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:08,289 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 00:09:08,297 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:09:08,493 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 82 check-sat command(s) [2018-10-01 00:09:08,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:08,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 0 proven. 13203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:08,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:08,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [164, 164] total 164 [2018-10-01 00:09:08,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 165 states [2018-10-01 00:09:08,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2018-10-01 00:09:08,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-10-01 00:09:08,558 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 165 states. [2018-10-01 00:09:09,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:09,227 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-01 00:09:09,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2018-10-01 00:09:09,227 INFO L78 Accepts]: Start accepts. Automaton has 165 states. Word has length 165 [2018-10-01 00:09:09,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:09,228 INFO L225 Difference]: With dead ends: 169 [2018-10-01 00:09:09,228 INFO L226 Difference]: Without dead ends: 167 [2018-10-01 00:09:09,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-10-01 00:09:09,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-01 00:09:09,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-01 00:09:09,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-01 00:09:09,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-10-01 00:09:09,232 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 165 [2018-10-01 00:09:09,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:09,233 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-10-01 00:09:09,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 165 states. [2018-10-01 00:09:09,233 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-10-01 00:09:09,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-01 00:09:09,233 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:09,233 INFO L375 BasicCegarLoop]: trace histogram [163, 1, 1, 1] [2018-10-01 00:09:09,233 INFO L423 AbstractCegarLoop]: === Iteration 164 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:09,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:09,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1620704966, now seen corresponding path program 163 times [2018-10-01 00:09:09,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:09,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:09,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:09,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:09,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:19,071 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:19,071 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 00:09:19,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:09:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:19,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:19,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:19,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [165, 165] total 165 [2018-10-01 00:09:19,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-10-01 00:09:19,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-10-01 00:09:19,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-10-01 00:09:19,236 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 166 states. [2018-10-01 00:09:19,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:19,680 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-10-01 00:09:19,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2018-10-01 00:09:19,680 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 166 [2018-10-01 00:09:19,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:19,681 INFO L225 Difference]: With dead ends: 170 [2018-10-01 00:09:19,681 INFO L226 Difference]: Without dead ends: 168 [2018-10-01 00:09:19,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-10-01 00:09:19,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-01 00:09:19,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-10-01 00:09:19,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-01 00:09:19,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-10-01 00:09:19,686 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 166 [2018-10-01 00:09:19,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:19,686 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-10-01 00:09:19,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-10-01 00:09:19,686 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-10-01 00:09:19,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-01 00:09:19,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:19,686 INFO L375 BasicCegarLoop]: trace histogram [164, 1, 1, 1] [2018-10-01 00:09:19,687 INFO L423 AbstractCegarLoop]: === Iteration 165 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:19,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:19,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1297757472, now seen corresponding path program 164 times [2018-10-01 00:09:19,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:19,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:19,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:19,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:09:19,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:19,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 13530 backedges. 0 proven. 13530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:29,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:29,761 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 00:09:29,768 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:09:29,860 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:09:29,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:29,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 13530 backedges. 0 proven. 13530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:29,923 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:29,923 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [166, 166] total 166 [2018-10-01 00:09:29,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 167 states [2018-10-01 00:09:29,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2018-10-01 00:09:29,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-10-01 00:09:29,925 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 167 states. [2018-10-01 00:09:30,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:30,440 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-10-01 00:09:30,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2018-10-01 00:09:30,440 INFO L78 Accepts]: Start accepts. Automaton has 167 states. Word has length 167 [2018-10-01 00:09:30,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:30,441 INFO L225 Difference]: With dead ends: 171 [2018-10-01 00:09:30,441 INFO L226 Difference]: Without dead ends: 169 [2018-10-01 00:09:30,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-10-01 00:09:30,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-01 00:09:30,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-01 00:09:30,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-01 00:09:30,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-10-01 00:09:30,445 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 167 [2018-10-01 00:09:30,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:30,445 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-10-01 00:09:30,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 167 states. [2018-10-01 00:09:30,445 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-10-01 00:09:30,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-01 00:09:30,445 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:30,445 INFO L375 BasicCegarLoop]: trace histogram [165, 1, 1, 1] [2018-10-01 00:09:30,446 INFO L423 AbstractCegarLoop]: === Iteration 166 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:30,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:30,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1575779834, now seen corresponding path program 165 times [2018-10-01 00:09:30,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:30,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:30,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:30,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:30,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:40,568 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:40,568 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:40,568 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 00:09:40,575 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:09:40,816 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2018-10-01 00:09:40,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:40,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:40,878 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:40,878 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [167, 167] total 167 [2018-10-01 00:09:40,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-10-01 00:09:40,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-10-01 00:09:40,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-10-01 00:09:40,880 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 168 states. [2018-10-01 00:09:41,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:41,753 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2018-10-01 00:09:41,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2018-10-01 00:09:41,753 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 168 [2018-10-01 00:09:41,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:41,754 INFO L225 Difference]: With dead ends: 172 [2018-10-01 00:09:41,754 INFO L226 Difference]: Without dead ends: 170 [2018-10-01 00:09:41,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-10-01 00:09:41,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-01 00:09:41,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2018-10-01 00:09:41,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-10-01 00:09:41,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-10-01 00:09:41,758 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 168 [2018-10-01 00:09:41,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:41,758 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-10-01 00:09:41,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-10-01 00:09:41,758 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-10-01 00:09:41,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-10-01 00:09:41,758 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:41,758 INFO L375 BasicCegarLoop]: trace histogram [166, 1, 1, 1] [2018-10-01 00:09:41,759 INFO L423 AbstractCegarLoop]: === Iteration 167 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:41,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:41,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1604538464, now seen corresponding path program 166 times [2018-10-01 00:09:41,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:41,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:41,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:41,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:41,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13861 backedges. 0 proven. 13861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:51,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:51,563 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 00:09:51,570 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:09:51,681 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:09:51,681 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:51,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:51,724 INFO L134 CoverageAnalysis]: Checked inductivity of 13861 backedges. 0 proven. 13861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:51,744 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:51,744 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [168, 168] total 168 [2018-10-01 00:09:51,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 169 states [2018-10-01 00:09:51,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2018-10-01 00:09:51,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-10-01 00:09:51,746 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand 169 states. [2018-10-01 00:09:52,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:52,600 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-10-01 00:09:52,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2018-10-01 00:09:52,600 INFO L78 Accepts]: Start accepts. Automaton has 169 states. Word has length 169 [2018-10-01 00:09:52,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:52,601 INFO L225 Difference]: With dead ends: 173 [2018-10-01 00:09:52,601 INFO L226 Difference]: Without dead ends: 171 [2018-10-01 00:09:52,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-10-01 00:09:52,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-01 00:09:52,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-01 00:09:52,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-01 00:09:52,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-10-01 00:09:52,604 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 169 [2018-10-01 00:09:52,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:52,605 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-10-01 00:09:52,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 169 states. [2018-10-01 00:09:52,605 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-10-01 00:09:52,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-01 00:09:52,605 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:52,605 INFO L375 BasicCegarLoop]: trace histogram [167, 1, 1, 1] [2018-10-01 00:09:52,605 INFO L423 AbstractCegarLoop]: === Iteration 168 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:52,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:52,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1798911302, now seen corresponding path program 167 times [2018-10-01 00:09:52,606 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:52,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:52,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:52,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:52,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:02,716 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:02,716 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 00:10:02,723 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:10:02,947 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-10-01 00:10:02,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:02,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:03,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:03,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [169, 169] total 169 [2018-10-01 00:10:03,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-10-01 00:10:03,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-10-01 00:10:03,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14365, Invalid=14365, Unknown=0, NotChecked=0, Total=28730 [2018-10-01 00:10:03,015 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 170 states. [2018-10-01 00:10:03,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:03,519 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2018-10-01 00:10:03,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2018-10-01 00:10:03,519 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 170 [2018-10-01 00:10:03,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:03,520 INFO L225 Difference]: With dead ends: 174 [2018-10-01 00:10:03,520 INFO L226 Difference]: Without dead ends: 172 [2018-10-01 00:10:03,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=14365, Invalid=14365, Unknown=0, NotChecked=0, Total=28730 [2018-10-01 00:10:03,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-10-01 00:10:03,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-10-01 00:10:03,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-01 00:10:03,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-10-01 00:10:03,524 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 170 [2018-10-01 00:10:03,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:03,524 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-10-01 00:10:03,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-10-01 00:10:03,524 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-10-01 00:10:03,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-01 00:10:03,525 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:03,525 INFO L375 BasicCegarLoop]: trace histogram [168, 1, 1, 1] [2018-10-01 00:10:03,525 INFO L423 AbstractCegarLoop]: === Iteration 169 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:03,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:03,525 INFO L82 PathProgramCache]: Analyzing trace with hash -68328352, now seen corresponding path program 168 times [2018-10-01 00:10:03,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:03,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:03,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:03,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:03,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:03,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 14196 backedges. 0 proven. 14196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:13,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:13,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:10:13,840 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:10:14,047 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-01 00:10:14,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:14,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 14196 backedges. 0 proven. 14196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:14,111 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:14,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [170, 170] total 170 [2018-10-01 00:10:14,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 171 states [2018-10-01 00:10:14,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2018-10-01 00:10:14,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14535, Invalid=14535, Unknown=0, NotChecked=0, Total=29070 [2018-10-01 00:10:14,113 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 171 states. [2018-10-01 00:10:14,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:14,769 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-10-01 00:10:14,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2018-10-01 00:10:14,769 INFO L78 Accepts]: Start accepts. Automaton has 171 states. Word has length 171 [2018-10-01 00:10:14,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:14,769 INFO L225 Difference]: With dead ends: 175 [2018-10-01 00:10:14,769 INFO L226 Difference]: Without dead ends: 173 [2018-10-01 00:10:14,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=14535, Invalid=14535, Unknown=0, NotChecked=0, Total=29070 [2018-10-01 00:10:14,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-01 00:10:14,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-01 00:10:14,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-01 00:10:14,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-10-01 00:10:14,773 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 171 [2018-10-01 00:10:14,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:14,773 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-10-01 00:10:14,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 171 states. [2018-10-01 00:10:14,773 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-10-01 00:10:14,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-01 00:10:14,774 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:14,774 INFO L375 BasicCegarLoop]: trace histogram [169, 1, 1, 1] [2018-10-01 00:10:14,774 INFO L423 AbstractCegarLoop]: === Iteration 170 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:14,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:14,774 INFO L82 PathProgramCache]: Analyzing trace with hash -2118182778, now seen corresponding path program 169 times [2018-10-01 00:10:14,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:14,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:14,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:14,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:14,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:25,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:25,266 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:25,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:10:25,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:25,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:25,413 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:25,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:25,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [171, 171] total 171 [2018-10-01 00:10:25,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-10-01 00:10:25,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-10-01 00:10:25,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14706, Invalid=14706, Unknown=0, NotChecked=0, Total=29412 [2018-10-01 00:10:25,436 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 172 states. [2018-10-01 00:10:26,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:26,384 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2018-10-01 00:10:26,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2018-10-01 00:10:26,385 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 172 [2018-10-01 00:10:26,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:26,386 INFO L225 Difference]: With dead ends: 176 [2018-10-01 00:10:26,386 INFO L226 Difference]: Without dead ends: 174 [2018-10-01 00:10:26,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=14706, Invalid=14706, Unknown=0, NotChecked=0, Total=29412 [2018-10-01 00:10:26,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-01 00:10:26,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-10-01 00:10:26,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-10-01 00:10:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2018-10-01 00:10:26,389 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 172 [2018-10-01 00:10:26,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:26,390 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2018-10-01 00:10:26,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-10-01 00:10:26,390 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2018-10-01 00:10:26,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-01 00:10:26,390 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:26,390 INFO L375 BasicCegarLoop]: trace histogram [170, 1, 1, 1] [2018-10-01 00:10:26,390 INFO L423 AbstractCegarLoop]: === Iteration 171 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:26,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:26,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1239160544, now seen corresponding path program 170 times [2018-10-01 00:10:26,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:26,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:26,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:26,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:10:26,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:36,859 INFO L134 CoverageAnalysis]: Checked inductivity of 14535 backedges. 0 proven. 14535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:36,859 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:36,859 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 00:10:36,867 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:10:36,964 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:10:36,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:36,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:37,007 INFO L134 CoverageAnalysis]: Checked inductivity of 14535 backedges. 0 proven. 14535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:37,028 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:37,028 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [172, 172] total 172 [2018-10-01 00:10:37,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 173 states [2018-10-01 00:10:37,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2018-10-01 00:10:37,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14878, Invalid=14878, Unknown=0, NotChecked=0, Total=29756 [2018-10-01 00:10:37,031 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand 173 states. [2018-10-01 00:10:37,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:37,488 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-10-01 00:10:37,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2018-10-01 00:10:37,489 INFO L78 Accepts]: Start accepts. Automaton has 173 states. Word has length 173 [2018-10-01 00:10:37,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:37,490 INFO L225 Difference]: With dead ends: 177 [2018-10-01 00:10:37,490 INFO L226 Difference]: Without dead ends: 175 [2018-10-01 00:10:37,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=14878, Invalid=14878, Unknown=0, NotChecked=0, Total=29756 [2018-10-01 00:10:37,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-01 00:10:37,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-01 00:10:37,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-01 00:10:37,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-10-01 00:10:37,494 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 173 [2018-10-01 00:10:37,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:37,495 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-10-01 00:10:37,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 173 states. [2018-10-01 00:10:37,495 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-10-01 00:10:37,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-01 00:10:37,495 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:37,495 INFO L375 BasicCegarLoop]: trace histogram [171, 1, 1, 1] [2018-10-01 00:10:37,496 INFO L423 AbstractCegarLoop]: === Iteration 172 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:37,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:37,496 INFO L82 PathProgramCache]: Analyzing trace with hash 240724934, now seen corresponding path program 171 times [2018-10-01 00:10:37,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:37,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:37,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:37,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:37,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:37,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:48,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:48,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:10:48,467 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:10:48,709 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 87 check-sat command(s) [2018-10-01 00:10:48,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:48,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:48,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:48,775 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:48,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [173, 173] total 173 [2018-10-01 00:10:48,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-10-01 00:10:48,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-10-01 00:10:48,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15051, Invalid=15051, Unknown=0, NotChecked=0, Total=30102 [2018-10-01 00:10:48,777 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 174 states. [2018-10-01 00:10:49,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:49,744 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2018-10-01 00:10:49,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2018-10-01 00:10:49,745 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 174 [2018-10-01 00:10:49,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:49,746 INFO L225 Difference]: With dead ends: 178 [2018-10-01 00:10:49,746 INFO L226 Difference]: Without dead ends: 176 [2018-10-01 00:10:49,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=15051, Invalid=15051, Unknown=0, NotChecked=0, Total=30102 [2018-10-01 00:10:49,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-01 00:10:49,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-10-01 00:10:49,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-01 00:10:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2018-10-01 00:10:49,751 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 174 [2018-10-01 00:10:49,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:49,751 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2018-10-01 00:10:49,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-10-01 00:10:49,751 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2018-10-01 00:10:49,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-10-01 00:10:49,751 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:49,752 INFO L375 BasicCegarLoop]: trace histogram [172, 1, 1, 1] [2018-10-01 00:10:49,752 INFO L423 AbstractCegarLoop]: === Iteration 173 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:49,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:49,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1127465504, now seen corresponding path program 172 times [2018-10-01 00:10:49,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:49,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:49,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:49,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:49,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 14878 backedges. 0 proven. 14878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:00,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:00,556 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 00:11:00,563 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:11:00,684 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:11:00,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:00,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 14878 backedges. 0 proven. 14878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:00,750 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:00,751 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [174, 174] total 174 [2018-10-01 00:11:00,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 175 states [2018-10-01 00:11:00,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2018-10-01 00:11:00,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15225, Invalid=15225, Unknown=0, NotChecked=0, Total=30450 [2018-10-01 00:11:00,753 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 175 states. [2018-10-01 00:11:01,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:01,466 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-10-01 00:11:01,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2018-10-01 00:11:01,466 INFO L78 Accepts]: Start accepts. Automaton has 175 states. Word has length 175 [2018-10-01 00:11:01,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:01,467 INFO L225 Difference]: With dead ends: 179 [2018-10-01 00:11:01,467 INFO L226 Difference]: Without dead ends: 177 [2018-10-01 00:11:01,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=15225, Invalid=15225, Unknown=0, NotChecked=0, Total=30450 [2018-10-01 00:11:01,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-01 00:11:01,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-10-01 00:11:01,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-01 00:11:01,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-10-01 00:11:01,471 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 175 [2018-10-01 00:11:01,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:01,471 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-10-01 00:11:01,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 175 states. [2018-10-01 00:11:01,472 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-10-01 00:11:01,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-01 00:11:01,472 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:01,472 INFO L375 BasicCegarLoop]: trace histogram [173, 1, 1, 1] [2018-10-01 00:11:01,472 INFO L423 AbstractCegarLoop]: === Iteration 174 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:11:01,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:01,472 INFO L82 PathProgramCache]: Analyzing trace with hash -591696122, now seen corresponding path program 173 times [2018-10-01 00:11:01,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:01,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:01,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:01,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:01,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 15051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:12,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:12,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:12,369 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:11:12,614 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 88 check-sat command(s) [2018-10-01 00:11:12,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:12,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 15051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:12,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:12,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [175, 175] total 175 [2018-10-01 00:11:12,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-10-01 00:11:12,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-10-01 00:11:12,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15400, Invalid=15400, Unknown=0, NotChecked=0, Total=30800 [2018-10-01 00:11:12,683 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 176 states. [2018-10-01 00:11:13,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:13,519 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2018-10-01 00:11:13,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2018-10-01 00:11:13,519 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 176 [2018-10-01 00:11:13,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:13,520 INFO L225 Difference]: With dead ends: 180 [2018-10-01 00:11:13,520 INFO L226 Difference]: Without dead ends: 178 [2018-10-01 00:11:13,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=15400, Invalid=15400, Unknown=0, NotChecked=0, Total=30800 [2018-10-01 00:11:13,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-10-01 00:11:13,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-10-01 00:11:13,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-01 00:11:13,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-10-01 00:11:13,524 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 176 [2018-10-01 00:11:13,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:13,524 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-10-01 00:11:13,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-10-01 00:11:13,524 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-10-01 00:11:13,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-01 00:11:13,525 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:13,525 INFO L375 BasicCegarLoop]: trace histogram [174, 1, 1, 1] [2018-10-01 00:11:13,525 INFO L423 AbstractCegarLoop]: === Iteration 175 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:11:13,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:13,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1162714464, now seen corresponding path program 174 times [2018-10-01 00:11:13,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:13,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:13,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:13,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:13,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-01 00:11:20,162 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-01 00:11:20,167 WARN L206 ceAbstractionStarter]: Timeout [2018-10-01 00:11:20,168 INFO L202 PluginConnector]: Adding new model Luxembourg.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.10 12:11:20 BoogieIcfgContainer [2018-10-01 00:11:20,168 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-01 00:11:20,169 INFO L168 Benchmark]: Toolchain (without parser) took 756337.72 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -95.4 MB). Free memory was 1.5 GB in the beginning and 637.3 MB in the end (delta: 824.7 MB). Peak memory consumption was 729.3 MB. Max. memory is 7.1 GB. [2018-10-01 00:11:20,172 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:11:20,172 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.51 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 00:11:20,173 INFO L168 Benchmark]: Boogie Preprocessor took 24.18 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 00:11:20,173 INFO L168 Benchmark]: RCFGBuilder took 304.78 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 00:11:20,173 INFO L168 Benchmark]: TraceAbstraction took 755960.37 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -95.4 MB). Free memory was 1.4 GB in the beginning and 637.3 MB in the end (delta: 803.6 MB). Peak memory consumption was 708.1 MB. Max. memory is 7.1 GB. [2018-10-01 00:11:20,176 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.51 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 24.18 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 304.78 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 755960.37 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -95.4 MB). Free memory was 1.4 GB in the beginning and 637.3 MB in the end (delta: 803.6 MB). Peak memory consumption was 708.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 24). Cancelled while BasicCegarLoop was analyzing trace of length 178 with TraceHistMax 174, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 135 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 755.8s OverallTime, 175 OverallIterations, 174 TraceHistogramMax, 52.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 524 SDtfs, 2 SDslu, 8559 SDs, 0 SdLazy, 23958 SolverSat, 311 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30796 GetRequests, 15571 SyntacticMatches, 0 SemanticMatches, 15225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 660.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=178occurred in iteration=174, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 174 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.5s SsaConstructionTime, 18.0s SatisfiabilityAnalysisTime, 668.5s InterpolantComputationTime, 31143 NumberOfCodeBlocks, 31143 NumberOfCodeBlocksAsserted, 4204 NumberOfCheckSat, 30796 ConstructedInterpolants, 0 QuantifiedInterpolants, 10749190 SizeOfPredicates, 173 NumberOfNonLiveVariables, 61761 ConjunctsInSsa, 15397 ConjunctsInUnsatCore, 347 InterpolantComputations, 1 PerfectInterpolantSequences, 0/1755950 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-01_00-11-20-187.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-01_00-11-20-187.csv Completed graceful shutdown