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/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:18:04,513 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:18:04,515 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:18:04,532 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:18:04,532 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:18:04,533 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:18:04,535 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:18:04,536 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:18:04,538 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:18:04,539 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:18:04,540 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 12:18:04,540 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 12:18:04,541 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 12:18:04,542 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 12:18:04,543 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 12:18:04,544 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 12:18:04,545 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 12:18:04,547 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 12:18:04,548 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 12:18:04,550 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 12:18:04,551 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 12:18:04,552 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 12:18:04,555 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-04 12:18:04,555 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-04 12:18:04,556 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-04 12:18:04,557 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-04 12:18:04,558 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-04 12:18:04,558 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-04 12:18:04,559 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-04 12:18:04,560 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-04 12:18:04,561 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-04 12:18:04,561 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-04 12:18:04,561 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-04 12:18:04,562 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-04 12:18:04,563 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-04 12:18:04,563 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-04 12:18:04,564 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-04 12:18:04,579 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:18:04,579 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:18:04,580 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:18:04,580 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:18:04,581 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:18:04,581 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:18:04,581 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:18:04,581 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:18:04,581 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:18:04,582 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:18:04,582 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:18:04,582 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:18:04,582 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:18:04,582 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:18:04,583 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:18:04,583 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:18:04,583 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:18:04,583 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:18:04,583 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:18:04,584 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:18:04,584 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:18:04,584 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:18:04,584 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:18:04,584 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:18:04,584 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:18:04,585 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:18:04,585 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:18:04,585 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:18:04,585 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:18:04,585 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:18:04,630 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:18:04,642 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:18:04,646 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:18:04,648 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:18:04,648 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:18:04,649 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-10-04 12:18:04,649 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl' [2018-10-04 12:18:04,718 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:18:04,720 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:18:04,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:18:04,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:18:04,721 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:18:04,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:18:04" (1/1) ... [2018-10-04 12:18:04,757 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:18:04" (1/1) ... [2018-10-04 12:18:04,764 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:18:04,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:18:04,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:18:04,765 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:18:04,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:18:04" (1/1) ... [2018-10-04 12:18:04,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:18:04" (1/1) ... [2018-10-04 12:18:04,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:18:04" (1/1) ... [2018-10-04 12:18:04,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:18:04" (1/1) ... [2018-10-04 12:18:04,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:18:04" (1/1) ... [2018-10-04 12:18:04,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:18:04" (1/1) ... [2018-10-04 12:18:04,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:18:04" (1/1) ... [2018-10-04 12:18:04,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:18:04,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:18:04,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:18:04,789 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:18:04,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:18:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:18:04,846 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-04 12:18:04,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 12:18:04,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 12:18:05,171 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 12:18:05,171 INFO L202 PluginConnector]: Adding new model down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:18:05 BoogieIcfgContainer [2018-10-04 12:18:05,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:18:05,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:18:05,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:18:05,179 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:18:05,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:18:04" (1/2) ... [2018-10-04 12:18:05,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765aa23d and model type down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:18:05, skipping insertion in model container [2018-10-04 12:18:05,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:18:05" (2/2) ... [2018-10-04 12:18:05,183 INFO L112 eAbstractionObserver]: Analyzing ICFG down.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-10-04 12:18:05,195 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:18:05,207 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:18:05,268 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:18:05,269 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:18:05,270 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:18:05,270 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:18:05,270 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:18:05,270 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:18:05,271 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:18:05,273 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:18:05,274 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:18:05,294 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-10-04 12:18:05,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 12:18:05,308 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:05,312 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-04 12:18:05,313 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:05,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:05,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1951930377, now seen corresponding path program 1 times [2018-10-04 12:18:05,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:05,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:05,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:05,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:05,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:05,538 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:18:05,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 12:18:05,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:18:05,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:18:05,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:18:05,564 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-10-04 12:18:05,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:05,698 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2018-10-04 12:18:05,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:18:05,701 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-04 12:18:05,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:05,712 INFO L225 Difference]: With dead ends: 23 [2018-10-04 12:18:05,713 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 12:18:05,717 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 [2018-10-04 12:18:05,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 12:18:05,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2018-10-04 12:18:05,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 12:18:05,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2018-10-04 12:18:05,797 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 7 [2018-10-04 12:18:05,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:05,798 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2018-10-04 12:18:05,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:18:05,798 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2018-10-04 12:18:05,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 12:18:05,799 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:05,799 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-04 12:18:05,799 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:05,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:05,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1951989959, now seen corresponding path program 1 times [2018-10-04 12:18:05,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:05,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:05,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:05,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:05,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:05,877 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:18:05,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 12:18:05,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:18:05,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:18:05,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:18:05,880 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand 4 states. [2018-10-04 12:18:05,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:05,989 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2018-10-04 12:18:05,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:18:05,990 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-10-04 12:18:05,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:05,990 INFO L225 Difference]: With dead ends: 20 [2018-10-04 12:18:05,990 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:18:05,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:18:05,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:18:05,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 12:18:05,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 12:18:05,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2018-10-04 12:18:05,997 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 7 [2018-10-04 12:18:05,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:05,997 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2018-10-04 12:18:05,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:18:05,997 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2018-10-04 12:18:05,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:18:05,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:05,998 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 12:18:05,998 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:06,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:06,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1455783312, now seen corresponding path program 1 times [2018-10-04 12:18:06,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:06,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:06,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:06,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:06,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:06,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-04 12:18:06,057 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:18:06,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-04 12:18:06,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:18:06,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:18:06,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:18:06,059 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2018-10-04 12:18:06,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:06,160 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2018-10-04 12:18:06,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:18:06,160 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-10-04 12:18:06,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:06,161 INFO L225 Difference]: With dead ends: 19 [2018-10-04 12:18:06,161 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 12:18:06,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:18:06,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 12:18:06,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 13. [2018-10-04 12:18:06,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 12:18:06,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2018-10-04 12:18:06,167 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2018-10-04 12:18:06,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:06,168 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2018-10-04 12:18:06,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:18:06,168 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2018-10-04 12:18:06,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:18:06,169 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:06,169 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 12:18:06,169 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:06,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:06,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1455723730, now seen corresponding path program 1 times [2018-10-04 12:18:06,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:06,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:06,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:06,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:06,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:06,227 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:18:06,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 12:18:06,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:18:06,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:18:06,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:18:06,228 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 4 states. [2018-10-04 12:18:06,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:06,298 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2018-10-04 12:18:06,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:18:06,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-10-04 12:18:06,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:06,300 INFO L225 Difference]: With dead ends: 25 [2018-10-04 12:18:06,300 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:18:06,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:18:06,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:18:06,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-10-04 12:18:06,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 12:18:06,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2018-10-04 12:18:06,306 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2018-10-04 12:18:06,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:06,306 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2018-10-04 12:18:06,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:18:06,307 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2018-10-04 12:18:06,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 12:18:06,307 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:06,307 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 12:18:06,308 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:06,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:06,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1394403420, now seen corresponding path program 1 times [2018-10-04 12:18:06,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:06,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:06,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:06,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:06,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:06,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:06,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:06,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:06,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:06,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:06,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:06,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 12:18:06,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:18:06,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:18:06,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:18:06,534 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 6 states. [2018-10-04 12:18:06,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:06,772 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-10-04 12:18:06,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:18:06,773 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-10-04 12:18:06,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:06,774 INFO L225 Difference]: With dead ends: 31 [2018-10-04 12:18:06,774 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 12:18:06,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:18:06,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 12:18:06,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 12:18:06,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 12:18:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-04 12:18:06,780 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2018-10-04 12:18:06,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:06,781 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-04 12:18:06,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:18:06,781 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-04 12:18:06,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 12:18:06,782 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:06,782 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 12:18:06,783 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:06,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:06,784 INFO L82 PathProgramCache]: Analyzing trace with hash -961145443, now seen corresponding path program 2 times [2018-10-04 12:18:06,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:06,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:06,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:06,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:06,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:07,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:07,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:07,080 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:18:07,130 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:18:07,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:07,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:07,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:07,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:07,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 12:18:07,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:18:07,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:18:07,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:18:07,182 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2018-10-04 12:18:07,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:07,295 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-10-04 12:18:07,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:18:07,297 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-04 12:18:07,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:07,298 INFO L225 Difference]: With dead ends: 30 [2018-10-04 12:18:07,298 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 12:18:07,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:18:07,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 12:18:07,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2018-10-04 12:18:07,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 12:18:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-04 12:18:07,311 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2018-10-04 12:18:07,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:07,311 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-04 12:18:07,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:18:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-04 12:18:07,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 12:18:07,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:07,315 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-10-04 12:18:07,315 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:07,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:07,315 INFO L82 PathProgramCache]: Analyzing trace with hash -552275309, now seen corresponding path program 3 times [2018-10-04 12:18:07,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:07,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:07,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:07,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:07,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:07,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:07,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:07,520 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:18:07,558 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 12:18:07,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:07,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:07,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:07,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 12:18:07,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:18:07,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:18:07,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:18:07,593 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2018-10-04 12:18:07,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:07,725 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-10-04 12:18:07,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:18:07,726 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-10-04 12:18:07,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:07,726 INFO L225 Difference]: With dead ends: 40 [2018-10-04 12:18:07,727 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 12:18:07,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:18:07,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 12:18:07,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 12:18:07,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 12:18:07,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-10-04 12:18:07,733 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2018-10-04 12:18:07,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:07,733 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-10-04 12:18:07,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:18:07,734 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-10-04 12:18:07,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:18:07,734 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:07,735 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2018-10-04 12:18:07,735 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:07,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:07,735 INFO L82 PathProgramCache]: Analyzing trace with hash 2071906362, now seen corresponding path program 4 times [2018-10-04 12:18:07,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:07,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:07,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:07,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:07,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:07,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:07,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:07,815 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:18:07,828 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:18:07,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:07,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:07,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:07,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 12:18:07,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:18:07,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:18:07,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:18:07,863 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2018-10-04 12:18:07,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:07,914 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-10-04 12:18:07,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:18:07,915 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-10-04 12:18:07,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:07,916 INFO L225 Difference]: With dead ends: 35 [2018-10-04 12:18:07,916 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 12:18:07,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:18:07,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 12:18:07,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2018-10-04 12:18:07,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 12:18:07,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-04 12:18:07,926 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 18 [2018-10-04 12:18:07,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:07,926 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-04 12:18:07,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:18:07,927 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-04 12:18:07,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 12:18:07,927 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:07,928 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 12:18:07,928 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:07,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:07,928 INFO L82 PathProgramCache]: Analyzing trace with hash -992407888, now seen corresponding path program 5 times [2018-10-04 12:18:07,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:07,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:07,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:07,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:07,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:08,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:08,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:08,208 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:18:08,230 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 12:18:08,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:08,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:08,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:08,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 12:18:08,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:18:08,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:18:08,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:18:08,269 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-10-04 12:18:08,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:08,707 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-10-04 12:18:08,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:18:08,708 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-10-04 12:18:08,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:08,709 INFO L225 Difference]: With dead ends: 49 [2018-10-04 12:18:08,709 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 12:18:08,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:18:08,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 12:18:08,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 12:18:08,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 12:18:08,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-10-04 12:18:08,716 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2018-10-04 12:18:08,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:08,716 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-10-04 12:18:08,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:18:08,716 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-10-04 12:18:08,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 12:18:08,717 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:08,717 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 12:18:08,717 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:08,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:08,718 INFO L82 PathProgramCache]: Analyzing trace with hash 390441321, now seen corresponding path program 6 times [2018-10-04 12:18:08,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:08,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:08,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:08,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:08,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:08,808 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:08,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:08,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:08,819 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:18:08,841 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-04 12:18:08,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:08,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:08,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:08,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 12:18:08,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:18:08,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:18:08,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:18:08,875 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2018-10-04 12:18:08,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:08,961 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2018-10-04 12:18:08,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:18:08,962 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-10-04 12:18:08,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:08,963 INFO L225 Difference]: With dead ends: 40 [2018-10-04 12:18:08,964 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 12:18:08,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:18:08,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 12:18:08,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2018-10-04 12:18:08,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 12:18:08,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-10-04 12:18:08,973 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2018-10-04 12:18:08,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:08,973 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-10-04 12:18:08,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:18:08,973 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-10-04 12:18:08,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 12:18:08,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:08,974 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-04 12:18:08,975 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:08,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:08,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1927135327, now seen corresponding path program 7 times [2018-10-04 12:18:08,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:08,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:08,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:08,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:08,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:08,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:09,166 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:09,166 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:09,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:09,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:09,206 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:09,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:09,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 12:18:09,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:18:09,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:18:09,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:18:09,229 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 12 states. [2018-10-04 12:18:09,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:09,462 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2018-10-04 12:18:09,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:18:09,462 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2018-10-04 12:18:09,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:09,463 INFO L225 Difference]: With dead ends: 58 [2018-10-04 12:18:09,463 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 12:18:09,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:18:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 12:18:09,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 12:18:09,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 12:18:09,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-04 12:18:09,471 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-10-04 12:18:09,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:09,471 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-04 12:18:09,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:18:09,471 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-04 12:18:09,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 12:18:09,472 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:09,472 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2018-10-04 12:18:09,473 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:09,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:09,473 INFO L82 PathProgramCache]: Analyzing trace with hash -906890938, now seen corresponding path program 8 times [2018-10-04 12:18:09,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:09,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:09,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:09,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:09,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:09,630 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:09,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:09,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:09,647 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:18:09,672 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:18:09,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:09,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:09,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:09,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 12:18:09,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:18:09,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:18:09,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:18:09,718 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 8 states. [2018-10-04 12:18:09,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:09,852 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-10-04 12:18:09,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:18:09,853 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2018-10-04 12:18:09,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:09,854 INFO L225 Difference]: With dead ends: 45 [2018-10-04 12:18:09,854 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 12:18:09,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:18:09,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 12:18:09,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-10-04 12:18:09,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 12:18:09,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-10-04 12:18:09,862 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2018-10-04 12:18:09,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:09,863 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-10-04 12:18:09,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:18:09,863 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-10-04 12:18:09,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 12:18:09,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:09,864 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-04 12:18:09,864 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:09,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:09,865 INFO L82 PathProgramCache]: Analyzing trace with hash -466038340, now seen corresponding path program 9 times [2018-10-04 12:18:09,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:09,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:09,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:09,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:09,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:10,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:10,032 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:10,042 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:18:10,135 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 12:18:10,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:10,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:10,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:10,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 12:18:10,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:18:10,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:18:10,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:18:10,194 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 14 states. [2018-10-04 12:18:10,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:10,837 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2018-10-04 12:18:10,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:18:10,837 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2018-10-04 12:18:10,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:10,838 INFO L225 Difference]: With dead ends: 67 [2018-10-04 12:18:10,838 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 12:18:10,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:18:10,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 12:18:10,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 12:18:10,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 12:18:10,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-10-04 12:18:10,847 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2018-10-04 12:18:10,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:10,847 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-10-04 12:18:10,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:18:10,847 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-10-04 12:18:10,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 12:18:10,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:10,848 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2018-10-04 12:18:10,849 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:10,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:10,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1282545973, now seen corresponding path program 10 times [2018-10-04 12:18:10,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:10,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:10,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:10,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:10,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:10,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:10,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:10,972 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:10,979 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:18:11,001 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:18:11,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:11,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:11,014 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:11,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:11,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 12:18:11,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:18:11,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:18:11,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:18:11,046 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 9 states. [2018-10-04 12:18:11,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:11,312 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2018-10-04 12:18:11,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:18:11,313 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-10-04 12:18:11,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:11,314 INFO L225 Difference]: With dead ends: 50 [2018-10-04 12:18:11,314 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 12:18:11,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:18:11,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 12:18:11,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2018-10-04 12:18:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 12:18:11,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-10-04 12:18:11,324 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2018-10-04 12:18:11,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:11,324 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-10-04 12:18:11,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:18:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-10-04 12:18:11,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 12:18:11,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:11,326 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-10-04 12:18:11,326 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:11,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:11,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1500867115, now seen corresponding path program 11 times [2018-10-04 12:18:11,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:11,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:11,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:11,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:11,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:11,550 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:11,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:11,550 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:11,558 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:18:11,595 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 12:18:11,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:11,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:11,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:11,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 12:18:11,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:18:11,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:18:11,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:18:11,632 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 16 states. [2018-10-04 12:18:11,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:11,883 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2018-10-04 12:18:11,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:18:11,883 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2018-10-04 12:18:11,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:11,884 INFO L225 Difference]: With dead ends: 76 [2018-10-04 12:18:11,884 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 12:18:11,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:18:11,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 12:18:11,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 12:18:11,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 12:18:11,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-10-04 12:18:11,892 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2018-10-04 12:18:11,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:11,892 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-10-04 12:18:11,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:18:11,892 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-10-04 12:18:11,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:18:11,893 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:11,893 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1] [2018-10-04 12:18:11,895 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:11,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:11,895 INFO L82 PathProgramCache]: Analyzing trace with hash 594208338, now seen corresponding path program 12 times [2018-10-04 12:18:11,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:11,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:11,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:11,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:11,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:12,116 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 40 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:12,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:12,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:12,124 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:18:12,145 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 12:18:12,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:12,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 40 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:12,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:12,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 12:18:12,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:18:12,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:18:12,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:18:12,192 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 10 states. [2018-10-04 12:18:12,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:12,317 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2018-10-04 12:18:12,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:18:12,318 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2018-10-04 12:18:12,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:12,319 INFO L225 Difference]: With dead ends: 55 [2018-10-04 12:18:12,319 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 12:18:12,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:18:12,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 12:18:12,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2018-10-04 12:18:12,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 12:18:12,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-10-04 12:18:12,332 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 38 [2018-10-04 12:18:12,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:12,332 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-10-04 12:18:12,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:18:12,333 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-10-04 12:18:12,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 12:18:12,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:12,334 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-04 12:18:12,334 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:12,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:12,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1054367944, now seen corresponding path program 13 times [2018-10-04 12:18:12,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:12,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:12,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:12,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:12,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 112 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:12,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:12,585 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:12,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:12,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:12,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 112 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:12,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:12,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 12:18:12,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:18:12,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:18:12,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:18:12,652 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 18 states. [2018-10-04 12:18:13,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:13,107 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2018-10-04 12:18:13,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:18:13,107 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2018-10-04 12:18:13,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:13,108 INFO L225 Difference]: With dead ends: 85 [2018-10-04 12:18:13,108 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 12:18:13,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:18:13,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 12:18:13,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 12:18:13,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 12:18:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-10-04 12:18:13,117 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2018-10-04 12:18:13,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:13,118 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-10-04 12:18:13,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:18:13,118 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-10-04 12:18:13,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 12:18:13,119 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:13,119 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2018-10-04 12:18:13,119 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:13,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:13,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1098736897, now seen corresponding path program 14 times [2018-10-04 12:18:13,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:13,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:13,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:13,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:13,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:13,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:13,430 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 50 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:13,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:13,430 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:13,441 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:18:13,473 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:18:13,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:13,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:13,498 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 50 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:13,528 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:13,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 12:18:13,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:18:13,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:18:13,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:18:13,529 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2018-10-04 12:18:13,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:13,640 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2018-10-04 12:18:13,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:18:13,640 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2018-10-04 12:18:13,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:13,641 INFO L225 Difference]: With dead ends: 60 [2018-10-04 12:18:13,641 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 12:18:13,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:18:13,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 12:18:13,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2018-10-04 12:18:13,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 12:18:13,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-10-04 12:18:13,651 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 43 [2018-10-04 12:18:13,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:13,651 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-10-04 12:18:13,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:18:13,652 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-10-04 12:18:13,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 12:18:13,653 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:13,653 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-04 12:18:13,653 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:13,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:13,653 INFO L82 PathProgramCache]: Analyzing trace with hash -48369673, now seen corresponding path program 15 times [2018-10-04 12:18:13,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:13,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:13,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:13,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:13,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 144 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:13,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:13,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:13,891 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:18:13,958 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 12:18:13,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:13,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:13,973 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 144 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:14,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:14,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 12:18:14,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:18:14,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:18:14,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:18:14,009 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 20 states. [2018-10-04 12:18:14,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:14,873 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2018-10-04 12:18:14,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:18:14,874 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2018-10-04 12:18:14,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:14,875 INFO L225 Difference]: With dead ends: 94 [2018-10-04 12:18:14,875 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 12:18:14,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:18:14,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 12:18:14,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 12:18:14,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 12:18:14,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2018-10-04 12:18:14,885 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 47 [2018-10-04 12:18:14,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:14,885 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2018-10-04 12:18:14,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:18:14,886 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2018-10-04 12:18:14,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 12:18:14,886 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:14,887 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1] [2018-10-04 12:18:14,887 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:14,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:14,887 INFO L82 PathProgramCache]: Analyzing trace with hash 239052638, now seen corresponding path program 16 times [2018-10-04 12:18:14,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:14,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:14,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:14,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:14,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:14,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 61 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:15,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:15,033 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:15,040 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:18:15,063 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:18:15,064 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:15,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 61 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:15,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:15,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 12:18:15,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:18:15,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:18:15,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:18:15,111 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 12 states. [2018-10-04 12:18:15,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:15,221 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2018-10-04 12:18:15,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:18:15,222 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2018-10-04 12:18:15,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:15,223 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:18:15,223 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 12:18:15,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:18:15,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 12:18:15,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-10-04 12:18:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 12:18:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-10-04 12:18:15,231 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 48 [2018-10-04 12:18:15,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:15,231 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-10-04 12:18:15,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:18:15,232 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-10-04 12:18:15,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 12:18:15,232 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:15,232 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-10-04 12:18:15,233 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:15,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:15,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1074641876, now seen corresponding path program 17 times [2018-10-04 12:18:15,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:15,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:15,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:15,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:15,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 180 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:15,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:15,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:15,574 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:18:15,603 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 12:18:15,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:15,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 180 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:15,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:15,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 12:18:15,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:18:15,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:18:15,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:18:15,657 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2018-10-04 12:18:16,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:16,272 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2018-10-04 12:18:16,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:18:16,272 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2018-10-04 12:18:16,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:16,272 INFO L225 Difference]: With dead ends: 103 [2018-10-04 12:18:16,273 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 12:18:16,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=731, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:18:16,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 12:18:16,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 12:18:16,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 12:18:16,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-04 12:18:16,281 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2018-10-04 12:18:16,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:16,281 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-04 12:18:16,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:18:16,281 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-04 12:18:16,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 12:18:16,282 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:16,282 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2018-10-04 12:18:16,282 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:16,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:16,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1305899827, now seen corresponding path program 18 times [2018-10-04 12:18:16,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:16,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:16,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:16,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:16,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 73 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:16,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:16,434 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:16,446 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:18:16,480 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-04 12:18:16,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:16,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 73 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:16,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:16,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 12:18:16,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:18:16,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:18:16,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:18:16,522 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 13 states. [2018-10-04 12:18:16,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:16,583 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2018-10-04 12:18:16,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:18:16,584 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2018-10-04 12:18:16,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:16,585 INFO L225 Difference]: With dead ends: 70 [2018-10-04 12:18:16,585 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 12:18:16,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:18:16,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 12:18:16,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2018-10-04 12:18:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 12:18:16,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-10-04 12:18:16,594 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 53 [2018-10-04 12:18:16,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:16,594 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-10-04 12:18:16,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:18:16,595 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-10-04 12:18:16,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 12:18:16,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:16,595 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-10-04 12:18:16,596 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:16,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:16,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1754878403, now seen corresponding path program 19 times [2018-10-04 12:18:16,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:16,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:16,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:16,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:16,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 220 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:16,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:16,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:16,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:16,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 220 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:16,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:16,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 12:18:16,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:18:16,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:18:16,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:18:16,985 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 24 states. [2018-10-04 12:18:17,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:17,405 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2018-10-04 12:18:17,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:18:17,405 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2018-10-04 12:18:17,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:17,406 INFO L225 Difference]: With dead ends: 112 [2018-10-04 12:18:17,406 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 12:18:17,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:18:17,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 12:18:17,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 12:18:17,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 12:18:17,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-10-04 12:18:17,413 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 57 [2018-10-04 12:18:17,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:17,413 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-10-04 12:18:17,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:18:17,413 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-10-04 12:18:17,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 12:18:17,414 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:17,414 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2018-10-04 12:18:17,414 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:17,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:17,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1471794070, now seen corresponding path program 20 times [2018-10-04 12:18:17,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:17,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:17,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:17,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:17,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:17,886 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 86 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:17,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:17,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:17,893 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:18:17,936 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:18:17,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:17,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 86 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:17,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:17,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 12:18:17,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:18:17,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:18:17,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:18:17,981 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 14 states. [2018-10-04 12:18:18,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:18,106 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2018-10-04 12:18:18,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:18:18,107 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2018-10-04 12:18:18,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:18,107 INFO L225 Difference]: With dead ends: 75 [2018-10-04 12:18:18,107 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 12:18:18,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:18:18,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 12:18:18,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2018-10-04 12:18:18,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 12:18:18,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-10-04 12:18:18,114 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 58 [2018-10-04 12:18:18,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:18,115 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-10-04 12:18:18,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:18:18,115 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-10-04 12:18:18,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 12:18:18,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:18,115 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1] [2018-10-04 12:18:18,116 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:18,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:18,116 INFO L82 PathProgramCache]: Analyzing trace with hash 716104416, now seen corresponding path program 21 times [2018-10-04 12:18:18,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:18,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:18,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:18,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:18,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 264 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:19,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:19,281 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:19,288 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:18:19,327 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 12:18:19,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:19,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 264 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:19,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:19,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 12:18:19,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:18:19,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:18:19,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:18:19,368 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 26 states. [2018-10-04 12:18:19,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:19,737 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2018-10-04 12:18:19,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:18:19,737 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2018-10-04 12:18:19,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:19,738 INFO L225 Difference]: With dead ends: 121 [2018-10-04 12:18:19,738 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 12:18:19,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:18:19,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 12:18:19,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-04 12:18:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 12:18:19,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-10-04 12:18:19,744 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2018-10-04 12:18:19,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:19,744 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-10-04 12:18:19,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:18:19,745 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-10-04 12:18:19,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 12:18:19,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:19,745 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 1, 1, 1, 1, 1] [2018-10-04 12:18:19,745 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:19,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:19,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1699180391, now seen corresponding path program 22 times [2018-10-04 12:18:19,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:19,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:19,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:19,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:19,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:20,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:20,368 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:20,382 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:18:20,419 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:18:20,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:20,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:20,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:20,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 12:18:20,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:18:20,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:18:20,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:18:20,458 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 15 states. [2018-10-04 12:18:20,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:20,545 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2018-10-04 12:18:20,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:18:20,546 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2018-10-04 12:18:20,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:20,547 INFO L225 Difference]: With dead ends: 80 [2018-10-04 12:18:20,547 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 12:18:20,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:18:20,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 12:18:20,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2018-10-04 12:18:20,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 12:18:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-10-04 12:18:20,554 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2018-10-04 12:18:20,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:20,555 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-10-04 12:18:20,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:18:20,555 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-10-04 12:18:20,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-04 12:18:20,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:20,556 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1] [2018-10-04 12:18:20,556 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:20,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:20,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1490448497, now seen corresponding path program 23 times [2018-10-04 12:18:20,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:20,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:20,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:20,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:20,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 312 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:21,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:21,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:21,346 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:18:21,393 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 12:18:21,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:21,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 312 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:21,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:21,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 12:18:21,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:18:21,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:18:21,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:18:21,431 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 28 states. [2018-10-04 12:18:21,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:21,900 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2018-10-04 12:18:21,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:18:21,900 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 67 [2018-10-04 12:18:21,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:21,901 INFO L225 Difference]: With dead ends: 130 [2018-10-04 12:18:21,901 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 12:18:21,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=417, Invalid=1223, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:18:21,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 12:18:21,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 12:18:21,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 12:18:21,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2018-10-04 12:18:21,910 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2018-10-04 12:18:21,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:21,910 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2018-10-04 12:18:21,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:18:21,910 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2018-10-04 12:18:21,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 12:18:21,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:21,911 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2018-10-04 12:18:21,911 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:21,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:21,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1188334966, now seen corresponding path program 24 times [2018-10-04 12:18:21,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:21,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:21,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:21,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:21,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 115 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:22,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:22,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:22,255 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:18:22,297 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 12:18:22,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:22,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 115 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:22,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:22,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 12:18:22,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:18:22,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:18:22,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:18:22,332 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 16 states. [2018-10-04 12:18:22,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:22,449 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2018-10-04 12:18:22,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:18:22,450 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2018-10-04 12:18:22,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:22,450 INFO L225 Difference]: With dead ends: 85 [2018-10-04 12:18:22,450 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 12:18:22,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:18:22,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 12:18:22,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-10-04 12:18:22,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 12:18:22,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2018-10-04 12:18:22,458 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 68 [2018-10-04 12:18:22,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:22,458 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2018-10-04 12:18:22,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:18:22,458 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2018-10-04 12:18:22,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 12:18:22,459 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:22,459 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1] [2018-10-04 12:18:22,459 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:22,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:22,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1190013460, now seen corresponding path program 25 times [2018-10-04 12:18:22,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:22,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:22,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:22,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:22,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 364 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:23,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:23,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:23,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:23,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 364 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:23,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:23,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 12:18:23,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:18:23,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:18:23,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:18:23,558 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 30 states. [2018-10-04 12:18:24,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:24,313 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2018-10-04 12:18:24,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:18:24,313 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 72 [2018-10-04 12:18:24,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:24,314 INFO L225 Difference]: With dead ends: 139 [2018-10-04 12:18:24,314 INFO L226 Difference]: Without dead ends: 76 [2018-10-04 12:18:24,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:18:24,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-04 12:18:24,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-04 12:18:24,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 12:18:24,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-10-04 12:18:24,325 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 72 [2018-10-04 12:18:24,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:24,325 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-10-04 12:18:24,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:18:24,325 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-10-04 12:18:24,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-04 12:18:24,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:24,326 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 1, 1, 1, 1, 1] [2018-10-04 12:18:24,326 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:24,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:24,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1746112411, now seen corresponding path program 26 times [2018-10-04 12:18:24,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:24,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:24,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:24,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:24,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 131 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:24,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:24,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:24,777 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:18:24,820 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:18:24,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:24,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 131 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:24,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:24,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 12:18:24,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:18:24,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:18:24,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:18:24,864 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 17 states. [2018-10-04 12:18:24,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:24,983 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2018-10-04 12:18:24,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:18:24,984 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2018-10-04 12:18:24,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:24,985 INFO L225 Difference]: With dead ends: 90 [2018-10-04 12:18:24,985 INFO L226 Difference]: Without dead ends: 84 [2018-10-04 12:18:24,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:18:24,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-04 12:18:24,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2018-10-04 12:18:24,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 12:18:24,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-10-04 12:18:24,992 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2018-10-04 12:18:24,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:24,992 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-10-04 12:18:24,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:18:24,992 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-10-04 12:18:24,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-04 12:18:24,993 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:24,993 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2018-10-04 12:18:24,993 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:24,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:24,994 INFO L82 PathProgramCache]: Analyzing trace with hash 613460315, now seen corresponding path program 27 times [2018-10-04 12:18:24,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:24,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:24,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:24,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:24,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:25,441 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 420 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:25,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:25,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:25,449 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:18:25,498 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 12:18:25,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:25,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 420 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:25,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:25,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 12:18:25,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:18:25,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:18:25,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:18:25,549 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 32 states. [2018-10-04 12:18:26,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:26,442 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2018-10-04 12:18:26,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:18:26,443 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 77 [2018-10-04 12:18:26,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:26,443 INFO L225 Difference]: With dead ends: 148 [2018-10-04 12:18:26,444 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 12:18:26,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=541, Invalid=1621, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:18:26,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 12:18:26,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 12:18:26,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 12:18:26,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2018-10-04 12:18:26,450 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2018-10-04 12:18:26,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:26,450 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2018-10-04 12:18:26,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:18:26,451 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2018-10-04 12:18:26,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 12:18:26,451 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:26,451 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2018-10-04 12:18:26,451 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:26,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:26,452 INFO L82 PathProgramCache]: Analyzing trace with hash 381727362, now seen corresponding path program 28 times [2018-10-04 12:18:26,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:26,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:26,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:26,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:26,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 148 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:26,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:26,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:26,699 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:18:26,738 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:18:26,738 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:26,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 148 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:26,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:26,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 12:18:26,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:18:26,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:18:26,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:18:26,775 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 18 states. [2018-10-04 12:18:26,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:26,867 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2018-10-04 12:18:26,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:18:26,867 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2018-10-04 12:18:26,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:26,868 INFO L225 Difference]: With dead ends: 95 [2018-10-04 12:18:26,868 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 12:18:26,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:18:26,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 12:18:26,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2018-10-04 12:18:26,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 12:18:26,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-10-04 12:18:26,876 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 78 [2018-10-04 12:18:26,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:26,876 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-10-04 12:18:26,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:18:26,876 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-10-04 12:18:26,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 12:18:26,877 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:26,877 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 1, 1, 1, 1, 1] [2018-10-04 12:18:26,877 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:26,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:26,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1123248904, now seen corresponding path program 29 times [2018-10-04 12:18:26,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:26,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:26,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:26,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:26,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 480 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:27,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:27,377 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:27,386 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:18:27,531 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 12:18:27,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:27,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 480 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:27,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:27,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 12:18:27,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:18:27,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:18:27,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:18:27,567 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 34 states. [2018-10-04 12:18:28,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:28,275 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2018-10-04 12:18:28,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:18:28,276 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 82 [2018-10-04 12:18:28,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:28,276 INFO L225 Difference]: With dead ends: 157 [2018-10-04 12:18:28,276 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 12:18:28,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=609, Invalid=1841, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:18:28,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 12:18:28,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-04 12:18:28,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 12:18:28,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-10-04 12:18:28,287 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 82 [2018-10-04 12:18:28,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:28,287 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-10-04 12:18:28,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:18:28,287 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-10-04 12:18:28,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 12:18:28,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:28,288 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 1, 1, 1, 1, 1] [2018-10-04 12:18:28,288 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:28,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:28,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1191652401, now seen corresponding path program 30 times [2018-10-04 12:18:28,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:28,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:28,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:28,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:28,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 166 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:28,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:28,552 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:28,562 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:18:28,613 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 12:18:28,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:28,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 166 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:28,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:28,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 12:18:28,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:18:28,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:18:28,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:18:28,650 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 19 states. [2018-10-04 12:18:28,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:28,748 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2018-10-04 12:18:28,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:18:28,749 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 83 [2018-10-04 12:18:28,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:28,749 INFO L225 Difference]: With dead ends: 100 [2018-10-04 12:18:28,749 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 12:18:28,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:18:28,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 12:18:28,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2018-10-04 12:18:28,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-04 12:18:28,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2018-10-04 12:18:28,757 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 83 [2018-10-04 12:18:28,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:28,757 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2018-10-04 12:18:28,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:18:28,757 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2018-10-04 12:18:28,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-04 12:18:28,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:28,758 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1] [2018-10-04 12:18:28,758 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:28,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:28,758 INFO L82 PathProgramCache]: Analyzing trace with hash 219193127, now seen corresponding path program 31 times [2018-10-04 12:18:28,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:28,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:28,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:28,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:28,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 544 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:29,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:29,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:29,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:29,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 544 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:29,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:29,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 12:18:29,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:18:29,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:18:29,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:18:29,634 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 36 states. [2018-10-04 12:18:30,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:30,386 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2018-10-04 12:18:30,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 12:18:30,387 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 87 [2018-10-04 12:18:30,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:30,388 INFO L225 Difference]: With dead ends: 166 [2018-10-04 12:18:30,388 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 12:18:30,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=681, Invalid=2075, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:18:30,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 12:18:30,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 12:18:30,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 12:18:30,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-10-04 12:18:30,401 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 87 [2018-10-04 12:18:30,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:30,402 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-10-04 12:18:30,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:18:30,402 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-10-04 12:18:30,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 12:18:30,403 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:30,403 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 1, 1, 1, 1, 1] [2018-10-04 12:18:30,403 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:30,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:30,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1134517362, now seen corresponding path program 32 times [2018-10-04 12:18:30,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:30,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:30,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:30,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:30,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 185 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:30,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:30,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:30,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:18:30,834 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:18:30,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:30,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 185 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:30,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:30,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 12:18:30,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:18:30,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:18:30,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:18:30,874 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 20 states. [2018-10-04 12:18:30,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:30,990 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2018-10-04 12:18:30,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:18:30,991 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 88 [2018-10-04 12:18:30,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:30,992 INFO L225 Difference]: With dead ends: 105 [2018-10-04 12:18:30,992 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 12:18:30,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:18:30,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 12:18:31,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-10-04 12:18:31,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 12:18:31,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-10-04 12:18:31,003 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 88 [2018-10-04 12:18:31,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:31,003 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-10-04 12:18:31,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:18:31,004 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-10-04 12:18:31,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 12:18:31,004 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:31,004 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 1, 1, 1, 1, 1] [2018-10-04 12:18:31,005 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:31,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:31,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1074454524, now seen corresponding path program 33 times [2018-10-04 12:18:31,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:31,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:31,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:31,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:31,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 612 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:31,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:31,766 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:31,775 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:18:31,835 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 12:18:31,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:31,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 612 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:31,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:31,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 12:18:31,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:18:31,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:18:31,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:18:31,875 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 38 states. [2018-10-04 12:18:33,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:33,124 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2018-10-04 12:18:33,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 12:18:33,124 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 92 [2018-10-04 12:18:33,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:33,125 INFO L225 Difference]: With dead ends: 175 [2018-10-04 12:18:33,125 INFO L226 Difference]: Without dead ends: 96 [2018-10-04 12:18:33,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=757, Invalid=2323, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:18:33,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-04 12:18:33,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-04 12:18:33,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-04 12:18:33,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2018-10-04 12:18:33,134 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 92 [2018-10-04 12:18:33,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:33,134 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2018-10-04 12:18:33,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:18:33,134 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2018-10-04 12:18:33,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 12:18:33,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:33,135 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2018-10-04 12:18:33,135 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:33,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:33,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1513438211, now seen corresponding path program 34 times [2018-10-04 12:18:33,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:33,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:33,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:33,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:33,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:33,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 205 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:33,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:33,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:33,431 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:18:33,476 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:18:33,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:33,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 205 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:33,520 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:33,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 12:18:33,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:18:33,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:18:33,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:18:33,521 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 21 states. [2018-10-04 12:18:33,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:33,641 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2018-10-04 12:18:33,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:18:33,641 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2018-10-04 12:18:33,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:33,642 INFO L225 Difference]: With dead ends: 110 [2018-10-04 12:18:33,642 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 12:18:33,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:18:33,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 12:18:33,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2018-10-04 12:18:33,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 12:18:33,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-10-04 12:18:33,650 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2018-10-04 12:18:33,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:33,650 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-10-04 12:18:33,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:18:33,650 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-10-04 12:18:33,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-04 12:18:33,651 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:33,651 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 1, 1, 1, 1, 1] [2018-10-04 12:18:33,651 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:33,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:33,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1385467661, now seen corresponding path program 35 times [2018-10-04 12:18:33,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:33,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:33,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:33,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:33,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 684 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:34,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:34,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:34,988 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:18:35,048 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 12:18:35,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:35,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:35,070 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 684 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:35,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:35,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 12:18:35,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 12:18:35,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 12:18:35,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:18:35,096 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 40 states. [2018-10-04 12:18:35,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:35,806 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2018-10-04 12:18:35,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 12:18:35,806 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 97 [2018-10-04 12:18:35,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:35,807 INFO L225 Difference]: With dead ends: 184 [2018-10-04 12:18:35,807 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 12:18:35,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:18:35,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 12:18:35,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 12:18:35,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 12:18:35,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-10-04 12:18:35,816 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 97 [2018-10-04 12:18:35,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:35,816 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-10-04 12:18:35,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 12:18:35,816 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-10-04 12:18:35,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 12:18:35,817 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:35,817 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 1, 1, 1, 1, 1] [2018-10-04 12:18:35,817 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:35,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:35,818 INFO L82 PathProgramCache]: Analyzing trace with hash -209035110, now seen corresponding path program 36 times [2018-10-04 12:18:35,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:35,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:35,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:35,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:35,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:36,281 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 226 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:36,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:36,282 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:36,289 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:18:36,346 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 12:18:36,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:36,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 226 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:36,399 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:36,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 12:18:36,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:18:36,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:18:36,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:18:36,400 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 22 states. [2018-10-04 12:18:37,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:37,734 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2018-10-04 12:18:37,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:18:37,734 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2018-10-04 12:18:37,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:37,735 INFO L225 Difference]: With dead ends: 115 [2018-10-04 12:18:37,735 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 12:18:37,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:18:37,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 12:18:37,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2018-10-04 12:18:37,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 12:18:37,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-10-04 12:18:37,760 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 98 [2018-10-04 12:18:37,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:37,760 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-10-04 12:18:37,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:18:37,760 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-10-04 12:18:37,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 12:18:37,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:37,761 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 1, 1, 1, 1, 1] [2018-10-04 12:18:37,761 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:37,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:37,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1566476528, now seen corresponding path program 37 times [2018-10-04 12:18:37,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:37,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:37,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:37,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:37,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:37,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 760 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:39,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:39,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:39,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:39,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:39,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 760 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:39,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:39,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 12:18:39,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 12:18:39,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 12:18:39,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:18:39,150 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 42 states. [2018-10-04 12:18:41,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:41,066 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2018-10-04 12:18:41,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 12:18:41,066 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 102 [2018-10-04 12:18:41,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:41,067 INFO L225 Difference]: With dead ends: 193 [2018-10-04 12:18:41,067 INFO L226 Difference]: Without dead ends: 106 [2018-10-04 12:18:41,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=921, Invalid=2861, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 12:18:41,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-04 12:18:41,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-04 12:18:41,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 12:18:41,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-10-04 12:18:41,080 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 102 [2018-10-04 12:18:41,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:41,081 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-10-04 12:18:41,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 12:18:41,081 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-10-04 12:18:41,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-04 12:18:41,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:41,082 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 1, 1, 1, 1, 1] [2018-10-04 12:18:41,082 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:41,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:41,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1920546761, now seen corresponding path program 38 times [2018-10-04 12:18:41,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:41,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:41,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:41,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:41,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 248 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:42,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:42,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:42,512 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:18:42,577 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:18:42,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:42,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 248 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:42,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:42,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 12:18:42,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:18:42,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:18:42,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:18:42,620 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 23 states. [2018-10-04 12:18:42,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:42,746 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2018-10-04 12:18:42,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:18:42,747 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 103 [2018-10-04 12:18:42,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:42,748 INFO L225 Difference]: With dead ends: 120 [2018-10-04 12:18:42,749 INFO L226 Difference]: Without dead ends: 114 [2018-10-04 12:18:42,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:18:42,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-04 12:18:42,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2018-10-04 12:18:42,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 12:18:42,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-10-04 12:18:42,761 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 103 [2018-10-04 12:18:42,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:42,762 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-10-04 12:18:42,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:18:42,762 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-10-04 12:18:42,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 12:18:42,762 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:42,762 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 1, 1, 1, 1, 1] [2018-10-04 12:18:42,763 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:42,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:42,763 INFO L82 PathProgramCache]: Analyzing trace with hash -756867393, now seen corresponding path program 39 times [2018-10-04 12:18:42,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:42,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:42,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:42,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:42,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 840 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:43,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:43,599 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:43,606 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:18:43,678 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 12:18:43,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:43,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:43,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 840 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:43,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:43,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 12:18:43,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:18:43,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:18:43,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:18:43,739 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 44 states. [2018-10-04 12:18:46,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:46,251 INFO L93 Difference]: Finished difference Result 202 states and 206 transitions. [2018-10-04 12:18:46,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:18:46,252 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 107 [2018-10-04 12:18:46,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:46,253 INFO L225 Difference]: With dead ends: 202 [2018-10-04 12:18:46,253 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 12:18:46,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1009, Invalid=3151, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 12:18:46,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 12:18:46,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-04 12:18:46,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 12:18:46,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2018-10-04 12:18:46,263 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 107 [2018-10-04 12:18:46,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:46,263 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2018-10-04 12:18:46,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:18:46,263 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2018-10-04 12:18:46,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 12:18:46,264 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:46,264 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 1, 1, 1, 1, 1] [2018-10-04 12:18:46,265 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:46,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:46,265 INFO L82 PathProgramCache]: Analyzing trace with hash 798222758, now seen corresponding path program 40 times [2018-10-04 12:18:46,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:46,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:46,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:46,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:46,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:46,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 271 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:46,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:46,973 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:46,980 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:18:47,033 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:18:47,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:47,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:47,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 271 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:47,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:47,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 12:18:47,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:18:47,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:18:47,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:18:47,089 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 24 states. [2018-10-04 12:18:47,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:47,253 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2018-10-04 12:18:47,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:18:47,254 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 108 [2018-10-04 12:18:47,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:47,255 INFO L225 Difference]: With dead ends: 125 [2018-10-04 12:18:47,255 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 12:18:47,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:18:47,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 12:18:47,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-10-04 12:18:47,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 12:18:47,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-10-04 12:18:47,271 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 108 [2018-10-04 12:18:47,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:47,271 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-10-04 12:18:47,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:18:47,271 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-10-04 12:18:47,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 12:18:47,272 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:47,272 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 1, 1, 1, 1, 1] [2018-10-04 12:18:47,273 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:47,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:47,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1030199836, now seen corresponding path program 41 times [2018-10-04 12:18:47,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:47,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:47,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:47,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:47,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 924 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:48,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:48,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:48,456 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:18:48,526 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 12:18:48,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:48,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 924 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:48,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:48,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 12:18:48,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 12:18:48,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 12:18:48,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:18:48,573 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 46 states. [2018-10-04 12:18:49,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:49,647 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2018-10-04 12:18:49,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 12:18:49,647 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 112 [2018-10-04 12:18:49,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:49,648 INFO L225 Difference]: With dead ends: 211 [2018-10-04 12:18:49,648 INFO L226 Difference]: Without dead ends: 116 [2018-10-04 12:18:49,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1101, Invalid=3455, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 12:18:49,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-04 12:18:49,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-04 12:18:49,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-04 12:18:49,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2018-10-04 12:18:49,662 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 112 [2018-10-04 12:18:49,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:49,662 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2018-10-04 12:18:49,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 12:18:49,663 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2018-10-04 12:18:49,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-04 12:18:49,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:49,663 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 1, 1, 1, 1, 1] [2018-10-04 12:18:49,664 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:49,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:49,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1949005931, now seen corresponding path program 42 times [2018-10-04 12:18:49,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:49,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:49,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:49,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:49,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 295 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:50,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:50,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:50,270 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:18:50,351 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-04 12:18:50,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:50,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 295 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:50,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:50,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 12:18:50,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 12:18:50,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 12:18:50,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 12:18:50,409 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 25 states. [2018-10-04 12:18:50,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:50,590 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2018-10-04 12:18:50,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:18:50,591 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 113 [2018-10-04 12:18:50,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:50,592 INFO L225 Difference]: With dead ends: 130 [2018-10-04 12:18:50,592 INFO L226 Difference]: Without dead ends: 124 [2018-10-04 12:18:50,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 12:18:50,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-04 12:18:50,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2018-10-04 12:18:50,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-04 12:18:50,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2018-10-04 12:18:50,604 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 113 [2018-10-04 12:18:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:50,605 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2018-10-04 12:18:50,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 12:18:50,605 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2018-10-04 12:18:50,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-04 12:18:50,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:50,606 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1] [2018-10-04 12:18:50,606 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:50,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:50,606 INFO L82 PathProgramCache]: Analyzing trace with hash 725198987, now seen corresponding path program 43 times [2018-10-04 12:18:50,606 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:50,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:50,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:50,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:50,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 1012 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:53,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:53,296 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:53,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:53,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 1012 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:53,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:53,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 12:18:53,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 12:18:53,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 12:18:53,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:18:53,404 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 48 states. [2018-10-04 12:18:54,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:54,666 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2018-10-04 12:18:54,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 12:18:54,666 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 117 [2018-10-04 12:18:54,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:54,667 INFO L225 Difference]: With dead ends: 220 [2018-10-04 12:18:54,667 INFO L226 Difference]: Without dead ends: 121 [2018-10-04 12:18:54,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1197, Invalid=3773, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 12:18:54,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-04 12:18:54,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-04 12:18:54,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-04 12:18:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-10-04 12:18:54,677 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 117 [2018-10-04 12:18:54,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:54,678 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-10-04 12:18:54,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 12:18:54,678 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-10-04 12:18:54,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 12:18:54,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:54,678 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2018-10-04 12:18:54,679 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:54,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:54,679 INFO L82 PathProgramCache]: Analyzing trace with hash 995311282, now seen corresponding path program 44 times [2018-10-04 12:18:54,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:54,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:54,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:54,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:54,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 320 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:55,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:55,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:55,470 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:18:55,527 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:18:55,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:55,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 320 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:55,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:55,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 12:18:55,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:18:55,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:18:55,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:18:55,581 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 26 states. [2018-10-04 12:18:55,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:55,720 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2018-10-04 12:18:55,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:18:55,720 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2018-10-04 12:18:55,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:55,721 INFO L225 Difference]: With dead ends: 135 [2018-10-04 12:18:55,722 INFO L226 Difference]: Without dead ends: 129 [2018-10-04 12:18:55,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:18:55,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-04 12:18:55,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2018-10-04 12:18:55,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-04 12:18:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2018-10-04 12:18:55,737 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 118 [2018-10-04 12:18:55,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:55,738 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2018-10-04 12:18:55,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:18:55,738 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2018-10-04 12:18:55,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-04 12:18:55,739 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:55,739 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 1, 1, 1, 1, 1] [2018-10-04 12:18:55,739 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:55,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:55,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1935656, now seen corresponding path program 45 times [2018-10-04 12:18:55,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:55,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:55,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:55,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:55,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 1104 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:56,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:56,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:56,600 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:18:56,689 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 12:18:56,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:56,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 1104 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:56,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:56,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 12:18:56,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:18:56,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:18:56,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:18:56,754 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 50 states. [2018-10-04 12:18:58,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:58,042 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2018-10-04 12:18:58,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 12:18:58,042 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 122 [2018-10-04 12:18:58,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:58,043 INFO L225 Difference]: With dead ends: 229 [2018-10-04 12:18:58,043 INFO L226 Difference]: Without dead ends: 126 [2018-10-04 12:18:58,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1297, Invalid=4105, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 12:18:58,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-04 12:18:58,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-04 12:18:58,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-04 12:18:58,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2018-10-04 12:18:58,054 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 122 [2018-10-04 12:18:58,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:58,055 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2018-10-04 12:18:58,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:18:58,055 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2018-10-04 12:18:58,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-04 12:18:58,055 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:58,055 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 1, 1, 1, 1, 1] [2018-10-04 12:18:58,055 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:58,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:58,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1360966497, now seen corresponding path program 46 times [2018-10-04 12:18:58,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:58,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:58,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:58,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:58,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 346 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:58,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:58,915 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:18:58,923 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:18:58,984 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:18:58,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:58,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 346 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:59,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:59,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 12:18:59,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 12:18:59,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 12:18:59,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:18:59,042 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 27 states. [2018-10-04 12:18:59,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:59,191 INFO L93 Difference]: Finished difference Result 140 states and 143 transitions. [2018-10-04 12:18:59,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:18:59,191 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 123 [2018-10-04 12:18:59,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:59,193 INFO L225 Difference]: With dead ends: 140 [2018-10-04 12:18:59,193 INFO L226 Difference]: Without dead ends: 134 [2018-10-04 12:18:59,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:18:59,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-04 12:18:59,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2018-10-04 12:18:59,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-04 12:18:59,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-10-04 12:18:59,206 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 123 [2018-10-04 12:18:59,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:59,206 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-10-04 12:18:59,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 12:18:59,206 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-10-04 12:18:59,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-04 12:18:59,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:59,207 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 1, 1, 1, 1, 1] [2018-10-04 12:18:59,207 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:59,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:59,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1531900329, now seen corresponding path program 47 times [2018-10-04 12:18:59,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:59,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:59,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:59,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:59,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 1200 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:00,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:00,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:00,099 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:19:00,177 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 12:19:00,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:00,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 1200 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:00,221 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:00,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 12:19:00,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 12:19:00,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 12:19:00,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=1951, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:19:00,223 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 52 states. [2018-10-04 12:19:01,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:01,606 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2018-10-04 12:19:01,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 12:19:01,606 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 127 [2018-10-04 12:19:01,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:01,608 INFO L225 Difference]: With dead ends: 238 [2018-10-04 12:19:01,608 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 12:19:01,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1401, Invalid=4451, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 12:19:01,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 12:19:01,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-04 12:19:01,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-04 12:19:01,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-10-04 12:19:01,622 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 127 [2018-10-04 12:19:01,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:01,623 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-10-04 12:19:01,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 12:19:01,623 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-10-04 12:19:01,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 12:19:01,623 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:01,624 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 1, 1, 1, 1, 1] [2018-10-04 12:19:01,624 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:01,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:01,624 INFO L82 PathProgramCache]: Analyzing trace with hash -652320834, now seen corresponding path program 48 times [2018-10-04 12:19:01,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:01,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:01,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:01,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:01,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 373 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:02,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:02,439 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:02,446 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:19:02,536 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 12:19:02,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:02,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 373 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:02,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:02,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 12:19:02,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:19:02,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:19:02,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:19:02,600 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 28 states. [2018-10-04 12:19:02,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:02,753 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2018-10-04 12:19:02,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:19:02,753 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 128 [2018-10-04 12:19:02,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:02,754 INFO L225 Difference]: With dead ends: 145 [2018-10-04 12:19:02,754 INFO L226 Difference]: Without dead ends: 139 [2018-10-04 12:19:02,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:19:02,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-04 12:19:02,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-10-04 12:19:02,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-04 12:19:02,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2018-10-04 12:19:02,766 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 128 [2018-10-04 12:19:02,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:02,766 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2018-10-04 12:19:02,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:19:02,766 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2018-10-04 12:19:02,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-04 12:19:02,767 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:02,767 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 1, 1, 1, 1, 1] [2018-10-04 12:19:02,767 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:02,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:02,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1843837900, now seen corresponding path program 49 times [2018-10-04 12:19:02,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:02,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:02,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:02,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:02,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1300 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:04,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:04,302 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:04,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:04,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1300 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:04,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:04,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 12:19:04,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 12:19:04,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 12:19:04,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:19:04,435 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 54 states. [2018-10-04 12:19:05,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:05,964 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2018-10-04 12:19:05,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 12:19:05,965 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 132 [2018-10-04 12:19:05,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:05,965 INFO L225 Difference]: With dead ends: 247 [2018-10-04 12:19:05,965 INFO L226 Difference]: Without dead ends: 136 [2018-10-04 12:19:05,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1509, Invalid=4811, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 12:19:05,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-04 12:19:05,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-10-04 12:19:05,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-04 12:19:05,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-10-04 12:19:05,977 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 132 [2018-10-04 12:19:05,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:05,977 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-10-04 12:19:05,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 12:19:05,977 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-10-04 12:19:05,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-04 12:19:05,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:05,978 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 1, 1, 1, 1, 1] [2018-10-04 12:19:05,978 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:05,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:05,978 INFO L82 PathProgramCache]: Analyzing trace with hash 35240749, now seen corresponding path program 50 times [2018-10-04 12:19:05,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:05,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:05,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:05,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:05,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 401 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:06,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:06,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:06,644 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:19:06,703 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:19:06,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:06,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 401 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:06,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:06,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 12:19:06,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:19:06,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:19:06,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:19:06,768 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 29 states. [2018-10-04 12:19:07,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:07,699 INFO L93 Difference]: Finished difference Result 150 states and 153 transitions. [2018-10-04 12:19:07,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:19:07,699 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 133 [2018-10-04 12:19:07,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:07,700 INFO L225 Difference]: With dead ends: 150 [2018-10-04 12:19:07,700 INFO L226 Difference]: Without dead ends: 144 [2018-10-04 12:19:07,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:19:07,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-04 12:19:07,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2018-10-04 12:19:07,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-04 12:19:07,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2018-10-04 12:19:07,716 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 133 [2018-10-04 12:19:07,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:07,716 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2018-10-04 12:19:07,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:19:07,716 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2018-10-04 12:19:07,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-04 12:19:07,717 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:07,717 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 1, 1, 1, 1, 1] [2018-10-04 12:19:07,718 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:07,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:07,718 INFO L82 PathProgramCache]: Analyzing trace with hash -838119389, now seen corresponding path program 51 times [2018-10-04 12:19:07,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:07,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:07,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:07,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:07,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:08,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 1404 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:08,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:08,665 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:08,673 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:19:08,767 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 12:19:08,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:08,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 1404 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:08,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:08,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 12:19:08,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 12:19:08,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 12:19:08,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=811, Invalid=2269, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:19:08,817 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 56 states. [2018-10-04 12:19:10,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:10,216 INFO L93 Difference]: Finished difference Result 256 states and 260 transitions. [2018-10-04 12:19:10,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 12:19:10,216 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 137 [2018-10-04 12:19:10,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:10,217 INFO L225 Difference]: With dead ends: 256 [2018-10-04 12:19:10,217 INFO L226 Difference]: Without dead ends: 141 [2018-10-04 12:19:10,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1621, Invalid=5185, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 12:19:10,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-04 12:19:10,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-04 12:19:10,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-04 12:19:10,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2018-10-04 12:19:10,233 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 137 [2018-10-04 12:19:10,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:10,233 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2018-10-04 12:19:10,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 12:19:10,234 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2018-10-04 12:19:10,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-04 12:19:10,234 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:10,235 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 1, 1, 1, 1, 1] [2018-10-04 12:19:10,235 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:10,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:10,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1657490634, now seen corresponding path program 52 times [2018-10-04 12:19:10,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:10,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:10,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:10,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:10,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 430 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:10,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:10,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:10,651 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:19:10,711 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:19:10,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:10,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 430 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:10,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:10,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 12:19:10,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:19:10,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:19:10,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:19:10,765 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 30 states. [2018-10-04 12:19:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:10,928 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2018-10-04 12:19:10,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:19:10,928 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 138 [2018-10-04 12:19:10,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:10,929 INFO L225 Difference]: With dead ends: 155 [2018-10-04 12:19:10,929 INFO L226 Difference]: Without dead ends: 149 [2018-10-04 12:19:10,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:19:10,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-04 12:19:10,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2018-10-04 12:19:10,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-04 12:19:10,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-10-04 12:19:10,942 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 138 [2018-10-04 12:19:10,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:10,942 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-10-04 12:19:10,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:19:10,942 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-10-04 12:19:10,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-04 12:19:10,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:10,943 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 1, 1, 1, 1, 1] [2018-10-04 12:19:10,943 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:10,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:10,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1915800384, now seen corresponding path program 53 times [2018-10-04 12:19:10,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:10,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:10,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:10,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:10,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1512 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:11,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:11,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:11,969 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:19:12,059 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 12:19:12,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:12,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1512 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:12,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:12,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 12:19:12,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 12:19:12,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 12:19:12,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 12:19:12,130 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 58 states. [2018-10-04 12:19:13,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:13,996 INFO L93 Difference]: Finished difference Result 265 states and 269 transitions. [2018-10-04 12:19:13,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 12:19:13,997 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 142 [2018-10-04 12:19:13,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:13,997 INFO L225 Difference]: With dead ends: 265 [2018-10-04 12:19:13,997 INFO L226 Difference]: Without dead ends: 146 [2018-10-04 12:19:13,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1737, Invalid=5573, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 12:19:13,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-04 12:19:14,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-10-04 12:19:14,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-04 12:19:14,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2018-10-04 12:19:14,010 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 142 [2018-10-04 12:19:14,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:14,010 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2018-10-04 12:19:14,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 12:19:14,010 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2018-10-04 12:19:14,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-04 12:19:14,011 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:14,011 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 1, 1, 1, 1, 1] [2018-10-04 12:19:14,011 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:14,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:14,012 INFO L82 PathProgramCache]: Analyzing trace with hash 520593145, now seen corresponding path program 54 times [2018-10-04 12:19:14,012 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:14,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:14,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:14,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:14,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 460 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:14,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:14,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:14,476 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:19:14,573 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 12:19:14,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:14,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:14,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 460 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:14,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:14,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 12:19:14,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:19:14,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:19:14,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:19:14,621 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 31 states. [2018-10-04 12:19:14,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:14,796 INFO L93 Difference]: Finished difference Result 160 states and 163 transitions. [2018-10-04 12:19:14,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:19:14,797 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 143 [2018-10-04 12:19:14,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:14,798 INFO L225 Difference]: With dead ends: 160 [2018-10-04 12:19:14,798 INFO L226 Difference]: Without dead ends: 154 [2018-10-04 12:19:14,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:19:14,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-04 12:19:14,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2018-10-04 12:19:14,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-04 12:19:14,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2018-10-04 12:19:14,811 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 143 [2018-10-04 12:19:14,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:14,811 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2018-10-04 12:19:14,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:19:14,811 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2018-10-04 12:19:14,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-04 12:19:14,812 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:14,812 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 1, 1, 1, 1, 1] [2018-10-04 12:19:14,812 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:14,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:14,812 INFO L82 PathProgramCache]: Analyzing trace with hash 915041775, now seen corresponding path program 55 times [2018-10-04 12:19:14,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:14,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:14,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:14,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:14,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:14,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1624 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:15,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:15,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:15,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:16,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1624 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:16,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:16,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 12:19:16,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 12:19:16,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 12:19:16,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 12:19:16,096 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 60 states. [2018-10-04 12:19:18,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:18,467 INFO L93 Difference]: Finished difference Result 274 states and 278 transitions. [2018-10-04 12:19:18,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 12:19:18,467 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 147 [2018-10-04 12:19:18,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:18,468 INFO L225 Difference]: With dead ends: 274 [2018-10-04 12:19:18,468 INFO L226 Difference]: Without dead ends: 151 [2018-10-04 12:19:18,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1857, Invalid=5975, Unknown=0, NotChecked=0, Total=7832 [2018-10-04 12:19:18,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-04 12:19:18,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-04 12:19:18,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-04 12:19:18,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-10-04 12:19:18,482 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 147 [2018-10-04 12:19:18,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:18,482 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-10-04 12:19:18,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 12:19:18,482 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-10-04 12:19:18,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-04 12:19:18,483 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:18,483 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 1, 1, 1, 1, 1] [2018-10-04 12:19:18,483 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:18,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:18,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1773143510, now seen corresponding path program 56 times [2018-10-04 12:19:18,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:18,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:18,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:18,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:18,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 491 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:18,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:18,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:18,926 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:19:18,997 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:19:18,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:19,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 491 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:19,045 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:19,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 12:19:19,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:19:19,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:19:19,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:19:19,046 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 32 states. [2018-10-04 12:19:19,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:19,255 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2018-10-04 12:19:19,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:19:19,263 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 148 [2018-10-04 12:19:19,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:19,264 INFO L225 Difference]: With dead ends: 165 [2018-10-04 12:19:19,264 INFO L226 Difference]: Without dead ends: 159 [2018-10-04 12:19:19,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:19:19,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-04 12:19:19,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-10-04 12:19:19,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-04 12:19:19,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-10-04 12:19:19,282 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 148 [2018-10-04 12:19:19,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:19,282 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-10-04 12:19:19,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:19:19,282 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-10-04 12:19:19,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-04 12:19:19,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:19,283 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 1, 1, 1, 1, 1] [2018-10-04 12:19:19,283 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:19,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:19,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1766187444, now seen corresponding path program 57 times [2018-10-04 12:19:19,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:19,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:19,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:19,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:19,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 1740 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:20,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:20,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:20,413 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:19:20,513 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-04 12:19:20,513 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:20,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 1740 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:20,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:20,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 12:19:20,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 12:19:20,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 12:19:20,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 12:19:20,579 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 62 states. [2018-10-04 12:19:21,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:21,584 INFO L93 Difference]: Finished difference Result 283 states and 287 transitions. [2018-10-04 12:19:21,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 12:19:21,584 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 152 [2018-10-04 12:19:21,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:21,585 INFO L225 Difference]: With dead ends: 283 [2018-10-04 12:19:21,585 INFO L226 Difference]: Without dead ends: 156 [2018-10-04 12:19:21,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1981, Invalid=6391, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 12:19:21,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-04 12:19:21,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-04 12:19:21,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-04 12:19:21,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2018-10-04 12:19:21,599 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 152 [2018-10-04 12:19:21,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:21,599 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2018-10-04 12:19:21,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 12:19:21,599 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2018-10-04 12:19:21,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-04 12:19:21,599 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:21,600 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 1, 1, 1, 1, 1] [2018-10-04 12:19:21,600 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:21,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:21,600 INFO L82 PathProgramCache]: Analyzing trace with hash -928358715, now seen corresponding path program 58 times [2018-10-04 12:19:21,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:21,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:21,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:21,601 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:21,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 523 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:22,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:22,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:22,058 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:19:22,135 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:19:22,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:22,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 523 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:22,195 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:22,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 12:19:22,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 12:19:22,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 12:19:22,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 12:19:22,196 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand 33 states. [2018-10-04 12:19:22,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:22,496 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2018-10-04 12:19:22,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:19:22,496 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 153 [2018-10-04 12:19:22,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:22,497 INFO L225 Difference]: With dead ends: 170 [2018-10-04 12:19:22,497 INFO L226 Difference]: Without dead ends: 164 [2018-10-04 12:19:22,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 12:19:22,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-04 12:19:22,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2018-10-04 12:19:22,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-04 12:19:22,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2018-10-04 12:19:22,516 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 153 [2018-10-04 12:19:22,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:22,517 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2018-10-04 12:19:22,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 12:19:22,517 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2018-10-04 12:19:22,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-04 12:19:22,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:22,517 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 1, 1, 1, 1, 1] [2018-10-04 12:19:22,518 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:22,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:22,518 INFO L82 PathProgramCache]: Analyzing trace with hash -839882821, now seen corresponding path program 59 times [2018-10-04 12:19:22,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:22,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:22,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:22,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:22,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 1860 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:23,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:23,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:23,782 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:19:23,883 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 12:19:23,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:23,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 1860 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:23,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:23,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 12:19:23,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 12:19:23,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 12:19:23,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 12:19:23,981 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 64 states. [2018-10-04 12:19:25,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:25,927 INFO L93 Difference]: Finished difference Result 292 states and 296 transitions. [2018-10-04 12:19:25,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 12:19:25,928 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 157 [2018-10-04 12:19:25,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:25,929 INFO L225 Difference]: With dead ends: 292 [2018-10-04 12:19:25,929 INFO L226 Difference]: Without dead ends: 161 [2018-10-04 12:19:25,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2109, Invalid=6821, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 12:19:25,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-04 12:19:25,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-04 12:19:25,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-04 12:19:25,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-10-04 12:19:25,948 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 157 [2018-10-04 12:19:25,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:25,948 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-10-04 12:19:25,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 12:19:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-10-04 12:19:25,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-04 12:19:25,949 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:25,949 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 1, 1, 1, 1, 1] [2018-10-04 12:19:25,949 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:25,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:25,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1453492962, now seen corresponding path program 60 times [2018-10-04 12:19:25,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:25,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:25,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:25,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:25,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 556 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:26,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:26,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:26,462 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:19:26,583 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 12:19:26,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:26,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:26,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 556 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:26,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:26,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 12:19:26,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:19:26,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:19:26,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:19:26,634 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 34 states. [2018-10-04 12:19:26,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:26,833 INFO L93 Difference]: Finished difference Result 175 states and 178 transitions. [2018-10-04 12:19:26,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:19:26,834 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 158 [2018-10-04 12:19:26,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:26,835 INFO L225 Difference]: With dead ends: 175 [2018-10-04 12:19:26,835 INFO L226 Difference]: Without dead ends: 169 [2018-10-04 12:19:26,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:19:26,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-04 12:19:26,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2018-10-04 12:19:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-04 12:19:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2018-10-04 12:19:26,854 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 158 [2018-10-04 12:19:26,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:26,854 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2018-10-04 12:19:26,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:19:26,854 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2018-10-04 12:19:26,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-04 12:19:26,855 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:26,855 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 1, 1, 1, 1, 1] [2018-10-04 12:19:26,856 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:26,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:26,856 INFO L82 PathProgramCache]: Analyzing trace with hash 227229016, now seen corresponding path program 61 times [2018-10-04 12:19:26,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:26,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:26,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:26,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:26,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 1984 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:28,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:28,421 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:28,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:28,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 1984 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:28,568 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:28,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-04 12:19:28,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 12:19:28,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 12:19:28,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 12:19:28,570 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand 66 states. [2018-10-04 12:19:30,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:30,535 INFO L93 Difference]: Finished difference Result 301 states and 305 transitions. [2018-10-04 12:19:30,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 12:19:30,535 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 162 [2018-10-04 12:19:30,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:30,535 INFO L225 Difference]: With dead ends: 301 [2018-10-04 12:19:30,536 INFO L226 Difference]: Without dead ends: 166 [2018-10-04 12:19:30,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2241, Invalid=7265, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 12:19:30,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-04 12:19:30,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-10-04 12:19:30,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-04 12:19:30,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2018-10-04 12:19:30,555 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 162 [2018-10-04 12:19:30,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:30,556 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2018-10-04 12:19:30,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 12:19:30,556 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2018-10-04 12:19:30,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-04 12:19:30,557 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:30,557 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 1, 1, 1, 1, 1] [2018-10-04 12:19:30,557 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:30,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:30,558 INFO L82 PathProgramCache]: Analyzing trace with hash 541325969, now seen corresponding path program 62 times [2018-10-04 12:19:30,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:30,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:30,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:30,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:30,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:30,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:31,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 590 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:31,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:31,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:31,112 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:19:31,185 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:19:31,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:31,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 590 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:31,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:31,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 12:19:31,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:19:31,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:19:31,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:19:31,236 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 35 states. [2018-10-04 12:19:31,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:31,415 INFO L93 Difference]: Finished difference Result 180 states and 183 transitions. [2018-10-04 12:19:31,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:19:31,415 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 163 [2018-10-04 12:19:31,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:31,416 INFO L225 Difference]: With dead ends: 180 [2018-10-04 12:19:31,416 INFO L226 Difference]: Without dead ends: 174 [2018-10-04 12:19:31,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:19:31,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-04 12:19:31,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2018-10-04 12:19:31,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-10-04 12:19:31,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2018-10-04 12:19:31,433 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 163 [2018-10-04 12:19:31,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:31,433 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2018-10-04 12:19:31,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:19:31,433 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2018-10-04 12:19:31,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-04 12:19:31,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:31,434 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 1, 1, 1, 1, 1] [2018-10-04 12:19:31,434 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:31,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:31,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1149189511, now seen corresponding path program 63 times [2018-10-04 12:19:31,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:31,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:31,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:31,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:31,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 2112 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:33,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:33,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:33,026 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:19:33,144 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-04 12:19:33,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:33,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 2112 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:33,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:33,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 12:19:33,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 12:19:33,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 12:19:33,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=3367, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 12:19:33,214 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand 68 states. [2018-10-04 12:19:35,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:35,451 INFO L93 Difference]: Finished difference Result 310 states and 314 transitions. [2018-10-04 12:19:35,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 12:19:35,451 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 167 [2018-10-04 12:19:35,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:35,452 INFO L225 Difference]: With dead ends: 310 [2018-10-04 12:19:35,452 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 12:19:35,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2377, Invalid=7723, Unknown=0, NotChecked=0, Total=10100 [2018-10-04 12:19:35,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 12:19:35,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-04 12:19:35,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-04 12:19:35,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-10-04 12:19:35,468 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 167 [2018-10-04 12:19:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:35,468 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-10-04 12:19:35,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 12:19:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-10-04 12:19:35,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-04 12:19:35,469 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:35,469 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 1, 1, 1, 1, 1] [2018-10-04 12:19:35,469 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:35,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:35,470 INFO L82 PathProgramCache]: Analyzing trace with hash 167304174, now seen corresponding path program 64 times [2018-10-04 12:19:35,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:35,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:35,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:35,470 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:35,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 625 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:36,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:36,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:36,366 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:19:36,446 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:19:36,446 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:36,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 625 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:36,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:36,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 12:19:36,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:19:36,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:19:36,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:19:36,507 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 36 states. [2018-10-04 12:19:36,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:36,709 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2018-10-04 12:19:36,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 12:19:36,710 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 168 [2018-10-04 12:19:36,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:36,711 INFO L225 Difference]: With dead ends: 185 [2018-10-04 12:19:36,711 INFO L226 Difference]: Without dead ends: 179 [2018-10-04 12:19:36,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:19:36,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-04 12:19:36,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-10-04 12:19:36,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-04 12:19:36,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-10-04 12:19:36,732 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 168 [2018-10-04 12:19:36,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:36,732 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-10-04 12:19:36,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:19:36,732 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-10-04 12:19:36,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-04 12:19:36,733 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:36,733 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 1, 1, 1, 1, 1] [2018-10-04 12:19:36,733 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:36,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:36,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1678104476, now seen corresponding path program 65 times [2018-10-04 12:19:36,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:36,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:36,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:36,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:36,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 2244 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:38,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:38,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:38,455 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:19:38,559 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-04 12:19:38,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:38,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 2244 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:38,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:38,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 12:19:38,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 12:19:38,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 12:19:38,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 12:19:38,640 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 70 states. [2018-10-04 12:19:41,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:41,036 INFO L93 Difference]: Finished difference Result 319 states and 323 transitions. [2018-10-04 12:19:41,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 12:19:41,037 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 172 [2018-10-04 12:19:41,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:41,038 INFO L225 Difference]: With dead ends: 319 [2018-10-04 12:19:41,038 INFO L226 Difference]: Without dead ends: 176 [2018-10-04 12:19:41,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2517, Invalid=8195, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 12:19:41,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-04 12:19:41,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-10-04 12:19:41,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-04 12:19:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2018-10-04 12:19:41,058 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 172 [2018-10-04 12:19:41,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:41,059 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2018-10-04 12:19:41,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 12:19:41,059 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2018-10-04 12:19:41,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-04 12:19:41,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:41,060 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 1, 1, 1, 1, 1] [2018-10-04 12:19:41,060 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:41,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:41,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1483312547, now seen corresponding path program 66 times [2018-10-04 12:19:41,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:41,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:41,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:41,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:41,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 661 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:41,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:41,642 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:41,650 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:19:41,768 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-04 12:19:41,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:41,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:41,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 661 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:41,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:41,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 12:19:41,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 12:19:41,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 12:19:41,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 12:19:41,824 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 37 states. [2018-10-04 12:19:42,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:42,044 INFO L93 Difference]: Finished difference Result 190 states and 193 transitions. [2018-10-04 12:19:42,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:19:42,044 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 173 [2018-10-04 12:19:42,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:42,045 INFO L225 Difference]: With dead ends: 190 [2018-10-04 12:19:42,046 INFO L226 Difference]: Without dead ends: 184 [2018-10-04 12:19:42,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 12:19:42,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-10-04 12:19:42,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2018-10-04 12:19:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-10-04 12:19:42,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 182 transitions. [2018-10-04 12:19:42,065 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 182 transitions. Word has length 173 [2018-10-04 12:19:42,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:42,065 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 182 transitions. [2018-10-04 12:19:42,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 12:19:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 182 transitions. [2018-10-04 12:19:42,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-04 12:19:42,066 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:42,066 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 1, 1, 1, 1, 1] [2018-10-04 12:19:42,067 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:42,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:42,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1794699091, now seen corresponding path program 67 times [2018-10-04 12:19:42,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:42,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:42,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:42,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:42,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 2380 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:43,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:43,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:43,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:43,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 2380 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:43,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:43,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-04 12:19:43,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 12:19:43,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 12:19:43,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=3781, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 12:19:43,964 INFO L87 Difference]: Start difference. First operand 180 states and 182 transitions. Second operand 72 states. [2018-10-04 12:19:46,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:46,500 INFO L93 Difference]: Finished difference Result 328 states and 332 transitions. [2018-10-04 12:19:46,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 12:19:46,500 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 177 [2018-10-04 12:19:46,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:46,501 INFO L225 Difference]: With dead ends: 328 [2018-10-04 12:19:46,501 INFO L226 Difference]: Without dead ends: 181 [2018-10-04 12:19:46,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2661, Invalid=8681, Unknown=0, NotChecked=0, Total=11342 [2018-10-04 12:19:46,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-04 12:19:46,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-04 12:19:46,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-04 12:19:46,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-10-04 12:19:46,519 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 177 [2018-10-04 12:19:46,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:46,520 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-10-04 12:19:46,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 12:19:46,520 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-10-04 12:19:46,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-04 12:19:46,520 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:46,521 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 1, 1, 1, 1, 1] [2018-10-04 12:19:46,521 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:46,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:46,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2072574202, now seen corresponding path program 68 times [2018-10-04 12:19:46,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:46,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:46,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:46,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:46,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:47,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 698 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:47,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:47,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:47,211 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:19:47,293 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:19:47,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:47,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:47,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 698 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:47,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:47,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 12:19:47,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:19:47,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:19:47,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:19:47,349 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 38 states. [2018-10-04 12:19:47,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:47,546 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2018-10-04 12:19:47,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 12:19:47,546 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 178 [2018-10-04 12:19:47,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:47,547 INFO L225 Difference]: With dead ends: 195 [2018-10-04 12:19:47,547 INFO L226 Difference]: Without dead ends: 189 [2018-10-04 12:19:47,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:19:47,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-04 12:19:47,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2018-10-04 12:19:47,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-04 12:19:47,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-10-04 12:19:47,585 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 178 [2018-10-04 12:19:47,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:47,585 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-10-04 12:19:47,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:19:47,585 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-10-04 12:19:47,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-04 12:19:47,586 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:47,586 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 1, 1, 1, 1, 1] [2018-10-04 12:19:47,587 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:47,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:47,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1591533424, now seen corresponding path program 69 times [2018-10-04 12:19:47,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:47,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:47,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:47,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:47,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 2520 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:49,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:49,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:49,478 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:19:49,623 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-04 12:19:49,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:49,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 2520 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:49,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:49,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-04 12:19:49,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 12:19:49,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 12:19:49,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 12:19:49,701 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 74 states. [2018-10-04 12:19:52,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:52,426 INFO L93 Difference]: Finished difference Result 337 states and 341 transitions. [2018-10-04 12:19:52,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 12:19:52,426 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 182 [2018-10-04 12:19:52,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:52,427 INFO L225 Difference]: With dead ends: 337 [2018-10-04 12:19:52,427 INFO L226 Difference]: Without dead ends: 186 [2018-10-04 12:19:52,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2809, Invalid=9181, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 12:19:52,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-04 12:19:52,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-10-04 12:19:52,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-10-04 12:19:52,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2018-10-04 12:19:52,445 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 182 [2018-10-04 12:19:52,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:52,445 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2018-10-04 12:19:52,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 12:19:52,445 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2018-10-04 12:19:52,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-04 12:19:52,446 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:52,446 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 1, 1, 1, 1, 1] [2018-10-04 12:19:52,446 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:52,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:52,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1595685335, now seen corresponding path program 70 times [2018-10-04 12:19:52,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:52,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:52,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:52,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:52,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 736 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:53,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:53,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:53,517 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:19:53,608 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:19:53,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:53,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 736 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:53,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:53,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 12:19:53,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 12:19:53,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 12:19:53,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 12:19:53,705 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand 39 states. [2018-10-04 12:19:53,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:53,917 INFO L93 Difference]: Finished difference Result 200 states and 203 transitions. [2018-10-04 12:19:53,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 12:19:53,918 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 183 [2018-10-04 12:19:53,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:53,918 INFO L225 Difference]: With dead ends: 200 [2018-10-04 12:19:53,918 INFO L226 Difference]: Without dead ends: 194 [2018-10-04 12:19:53,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 12:19:53,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-04 12:19:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 190. [2018-10-04 12:19:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-10-04 12:19:53,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2018-10-04 12:19:53,936 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 183 [2018-10-04 12:19:53,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:53,936 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2018-10-04 12:19:53,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 12:19:53,936 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2018-10-04 12:19:53,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-10-04 12:19:53,936 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:53,937 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 1, 1, 1, 1, 1] [2018-10-04 12:19:53,937 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:53,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:53,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1835041505, now seen corresponding path program 71 times [2018-10-04 12:19:53,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:53,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:53,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:53,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:53,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 2664 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:55,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:55,641 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:55,648 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:19:55,772 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-04 12:19:55,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:55,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 2664 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:55,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:55,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-04 12:19:55,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 12:19:55,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 12:19:55,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1481, Invalid=4219, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 12:19:55,834 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 76 states. [2018-10-04 12:19:58,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:58,842 INFO L93 Difference]: Finished difference Result 346 states and 350 transitions. [2018-10-04 12:19:58,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 12:19:58,842 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 187 [2018-10-04 12:19:58,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:58,843 INFO L225 Difference]: With dead ends: 346 [2018-10-04 12:19:58,843 INFO L226 Difference]: Without dead ends: 191 [2018-10-04 12:19:58,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2961, Invalid=9695, Unknown=0, NotChecked=0, Total=12656 [2018-10-04 12:19:58,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-04 12:19:58,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-04 12:19:58,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-04 12:19:58,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-10-04 12:19:58,867 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 187 [2018-10-04 12:19:58,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:58,867 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-10-04 12:19:58,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 12:19:58,867 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-10-04 12:19:58,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-04 12:19:58,868 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:58,868 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 1, 1, 1, 1, 1] [2018-10-04 12:19:58,869 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:58,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:58,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1521017350, now seen corresponding path program 72 times [2018-10-04 12:19:58,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:58,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:58,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:58,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:58,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 775 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:59,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:59,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:59,577 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:19:59,714 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 12:19:59,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:59,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 775 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:59,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:59,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 12:19:59,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 12:19:59,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 12:19:59,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:19:59,775 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 40 states. [2018-10-04 12:19:59,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:59,997 INFO L93 Difference]: Finished difference Result 205 states and 208 transitions. [2018-10-04 12:19:59,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 12:19:59,998 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 188 [2018-10-04 12:19:59,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:59,999 INFO L225 Difference]: With dead ends: 205 [2018-10-04 12:19:59,999 INFO L226 Difference]: Without dead ends: 199 [2018-10-04 12:19:59,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:19:59,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-04 12:20:00,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2018-10-04 12:20:00,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-04 12:20:00,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2018-10-04 12:20:00,022 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 188 [2018-10-04 12:20:00,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:00,023 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2018-10-04 12:20:00,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 12:20:00,023 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2018-10-04 12:20:00,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-04 12:20:00,024 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:00,024 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 1, 1, 1, 1, 1] [2018-10-04 12:20:00,024 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:00,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:00,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1787388540, now seen corresponding path program 73 times [2018-10-04 12:20:00,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:00,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:00,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:00,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:00,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 2812 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:01,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:01,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:01,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:20:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:01,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 2812 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:02,037 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:02,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-04 12:20:02,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 12:20:02,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 12:20:02,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 12:20:02,039 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand 78 states. [2018-10-04 12:20:04,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:04,632 INFO L93 Difference]: Finished difference Result 355 states and 359 transitions. [2018-10-04 12:20:04,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 12:20:04,632 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 192 [2018-10-04 12:20:04,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:04,633 INFO L225 Difference]: With dead ends: 355 [2018-10-04 12:20:04,633 INFO L226 Difference]: Without dead ends: 196 [2018-10-04 12:20:04,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3117, Invalid=10223, Unknown=0, NotChecked=0, Total=13340 [2018-10-04 12:20:04,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-10-04 12:20:04,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-10-04 12:20:04,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-04 12:20:04,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2018-10-04 12:20:04,655 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 192 [2018-10-04 12:20:04,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:04,655 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2018-10-04 12:20:04,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 12:20:04,656 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2018-10-04 12:20:04,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-04 12:20:04,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:04,656 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 1, 1, 1, 1, 1] [2018-10-04 12:20:04,657 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:04,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:04,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1861088757, now seen corresponding path program 74 times [2018-10-04 12:20:04,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:04,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:04,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:04,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:20:04,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 815 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:05,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:05,375 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:05,382 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:20:05,470 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:20:05,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:05,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 815 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:05,529 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:05,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 12:20:05,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:20:05,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:20:05,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:20:05,531 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 41 states. [2018-10-04 12:20:05,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:05,748 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2018-10-04 12:20:05,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:20:05,749 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 193 [2018-10-04 12:20:05,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:05,750 INFO L225 Difference]: With dead ends: 210 [2018-10-04 12:20:05,750 INFO L226 Difference]: Without dead ends: 204 [2018-10-04 12:20:05,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:20:05,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-04 12:20:05,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2018-10-04 12:20:05,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-10-04 12:20:05,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2018-10-04 12:20:05,767 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 193 [2018-10-04 12:20:05,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:05,768 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2018-10-04 12:20:05,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:20:05,768 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2018-10-04 12:20:05,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-04 12:20:05,768 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:05,769 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 1, 1, 1, 1, 1] [2018-10-04 12:20:05,769 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:05,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:05,769 INFO L82 PathProgramCache]: Analyzing trace with hash -315300117, now seen corresponding path program 75 times [2018-10-04 12:20:05,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:05,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:05,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:05,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:05,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 2964 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:07,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:07,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:07,571 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:20:07,728 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-04 12:20:07,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:07,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 2964 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:07,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:07,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-04 12:20:07,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 12:20:07,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 12:20:07,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1639, Invalid=4681, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 12:20:07,808 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 80 states. [2018-10-04 12:20:11,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:11,153 INFO L93 Difference]: Finished difference Result 364 states and 368 transitions. [2018-10-04 12:20:11,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 12:20:11,154 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 197 [2018-10-04 12:20:11,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:11,155 INFO L225 Difference]: With dead ends: 364 [2018-10-04 12:20:11,155 INFO L226 Difference]: Without dead ends: 201 [2018-10-04 12:20:11,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3277, Invalid=10765, Unknown=0, NotChecked=0, Total=14042 [2018-10-04 12:20:11,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-04 12:20:11,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-10-04 12:20:11,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-04 12:20:11,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2018-10-04 12:20:11,180 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 197 [2018-10-04 12:20:11,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:11,181 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2018-10-04 12:20:11,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 12:20:11,181 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2018-10-04 12:20:11,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-04 12:20:11,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:11,182 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 1, 1, 1, 1, 1] [2018-10-04 12:20:11,182 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:11,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:11,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1372678382, now seen corresponding path program 76 times [2018-10-04 12:20:11,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:11,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:11,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:11,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:11,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:11,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:12,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 856 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:12,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:12,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:12,046 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:20:12,141 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:20:12,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:12,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 856 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:12,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:12,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 12:20:12,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 12:20:12,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 12:20:12,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:20:12,205 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand 42 states. [2018-10-04 12:20:12,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:12,490 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2018-10-04 12:20:12,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 12:20:12,491 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 198 [2018-10-04 12:20:12,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:12,492 INFO L225 Difference]: With dead ends: 215 [2018-10-04 12:20:12,492 INFO L226 Difference]: Without dead ends: 209 [2018-10-04 12:20:12,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:20:12,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-04 12:20:12,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 205. [2018-10-04 12:20:12,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-04 12:20:12,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-10-04 12:20:12,519 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 198 [2018-10-04 12:20:12,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:12,519 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-10-04 12:20:12,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 12:20:12,519 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-10-04 12:20:12,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-04 12:20:12,520 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:12,520 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 1, 1, 1, 1, 1] [2018-10-04 12:20:12,520 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:12,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:12,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1792389512, now seen corresponding path program 77 times [2018-10-04 12:20:12,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:12,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:12,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:12,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:12,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3900 backedges. 3120 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:14,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:14,621 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:14,628 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:20:14,760 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-04 12:20:14,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:14,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3900 backedges. 3120 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:14,824 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:14,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-04 12:20:14,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 12:20:14,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 12:20:14,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 12:20:14,825 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 82 states. [2018-10-04 12:20:17,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:17,355 INFO L93 Difference]: Finished difference Result 373 states and 377 transitions. [2018-10-04 12:20:17,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 12:20:17,355 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 202 [2018-10-04 12:20:17,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:17,356 INFO L225 Difference]: With dead ends: 373 [2018-10-04 12:20:17,356 INFO L226 Difference]: Without dead ends: 206 [2018-10-04 12:20:17,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3441, Invalid=11321, Unknown=0, NotChecked=0, Total=14762 [2018-10-04 12:20:17,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-04 12:20:17,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2018-10-04 12:20:17,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-10-04 12:20:17,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 208 transitions. [2018-10-04 12:20:17,381 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 208 transitions. Word has length 202 [2018-10-04 12:20:17,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:17,381 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 208 transitions. [2018-10-04 12:20:17,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 12:20:17,381 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 208 transitions. [2018-10-04 12:20:17,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-04 12:20:17,382 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:17,382 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 39, 1, 1, 1, 1, 1] [2018-10-04 12:20:17,382 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:17,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:17,383 INFO L82 PathProgramCache]: Analyzing trace with hash -185138751, now seen corresponding path program 78 times [2018-10-04 12:20:17,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:17,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:17,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:17,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:17,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 898 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:18,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:18,180 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:18,186 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:20:18,330 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-10-04 12:20:18,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:18,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:18,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 898 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:18,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:18,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 12:20:18,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 12:20:18,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 12:20:18,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:20:18,412 INFO L87 Difference]: Start difference. First operand 206 states and 208 transitions. Second operand 43 states. [2018-10-04 12:20:18,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:18,722 INFO L93 Difference]: Finished difference Result 220 states and 223 transitions. [2018-10-04 12:20:18,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 12:20:18,722 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 203 [2018-10-04 12:20:18,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:18,724 INFO L225 Difference]: With dead ends: 220 [2018-10-04 12:20:18,724 INFO L226 Difference]: Without dead ends: 214 [2018-10-04 12:20:18,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:20:18,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-10-04 12:20:18,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2018-10-04 12:20:18,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-10-04 12:20:18,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 212 transitions. [2018-10-04 12:20:18,751 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 212 transitions. Word has length 203 [2018-10-04 12:20:18,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:18,751 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 212 transitions. [2018-10-04 12:20:18,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 12:20:18,751 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 212 transitions. [2018-10-04 12:20:18,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-04 12:20:18,752 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:18,752 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 1, 1, 1, 1, 1] [2018-10-04 12:20:18,753 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:18,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:18,753 INFO L82 PathProgramCache]: Analyzing trace with hash -319083337, now seen corresponding path program 79 times [2018-10-04 12:20:18,753 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:18,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:18,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:18,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:18,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 3280 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:20,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:20,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:20,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:20:20,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:20,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 3280 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:21,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:21,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-04 12:20:21,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 12:20:21,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 12:20:21,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1805, Invalid=5167, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 12:20:21,013 INFO L87 Difference]: Start difference. First operand 210 states and 212 transitions. Second operand 84 states. [2018-10-04 12:20:23,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:23,502 INFO L93 Difference]: Finished difference Result 382 states and 386 transitions. [2018-10-04 12:20:23,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-04 12:20:23,502 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 207 [2018-10-04 12:20:23,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:23,503 INFO L225 Difference]: With dead ends: 382 [2018-10-04 12:20:23,503 INFO L226 Difference]: Without dead ends: 211 [2018-10-04 12:20:23,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3609, Invalid=11891, Unknown=0, NotChecked=0, Total=15500 [2018-10-04 12:20:23,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-04 12:20:23,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-10-04 12:20:23,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-04 12:20:23,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-10-04 12:20:23,523 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 207 [2018-10-04 12:20:23,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:23,523 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-10-04 12:20:23,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 12:20:23,523 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-10-04 12:20:23,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-04 12:20:23,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:23,524 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 40, 1, 1, 1, 1, 1] [2018-10-04 12:20:23,524 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:23,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:23,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1953503262, now seen corresponding path program 80 times [2018-10-04 12:20:23,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:23,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:23,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:23,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:20:23,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 941 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:24,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:24,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:24,584 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:20:24,679 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:20:24,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:24,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 941 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:24,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:24,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 12:20:24,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:20:24,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:20:24,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:20:24,745 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 44 states. [2018-10-04 12:20:25,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:25,000 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2018-10-04 12:20:25,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:20:25,000 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 208 [2018-10-04 12:20:25,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:25,001 INFO L225 Difference]: With dead ends: 225 [2018-10-04 12:20:25,001 INFO L226 Difference]: Without dead ends: 219 [2018-10-04 12:20:25,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:20:25,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-04 12:20:25,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2018-10-04 12:20:25,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-10-04 12:20:25,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2018-10-04 12:20:25,022 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 208 [2018-10-04 12:20:25,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:25,022 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2018-10-04 12:20:25,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:20:25,022 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2018-10-04 12:20:25,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-04 12:20:25,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:25,023 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 1, 1, 1, 1, 1] [2018-10-04 12:20:25,023 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:25,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:25,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1125633172, now seen corresponding path program 81 times [2018-10-04 12:20:25,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:25,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:25,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:25,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:25,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:27,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 3444 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:27,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:27,121 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:27,128 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:20:27,294 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-04 12:20:27,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:27,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 3444 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:27,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:27,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-04 12:20:27,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 12:20:27,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 12:20:27,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 12:20:27,387 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand 86 states. [2018-10-04 12:20:30,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:30,378 INFO L93 Difference]: Finished difference Result 391 states and 395 transitions. [2018-10-04 12:20:30,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-04 12:20:30,378 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 212 [2018-10-04 12:20:30,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:30,379 INFO L225 Difference]: With dead ends: 391 [2018-10-04 12:20:30,379 INFO L226 Difference]: Without dead ends: 216 [2018-10-04 12:20:30,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2542 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3781, Invalid=12475, Unknown=0, NotChecked=0, Total=16256 [2018-10-04 12:20:30,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-10-04 12:20:30,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2018-10-04 12:20:30,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-10-04 12:20:30,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 218 transitions. [2018-10-04 12:20:30,401 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 218 transitions. Word has length 212 [2018-10-04 12:20:30,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:30,401 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 218 transitions. [2018-10-04 12:20:30,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 12:20:30,402 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 218 transitions. [2018-10-04 12:20:30,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-10-04 12:20:30,402 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:30,403 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 1, 1, 1, 1, 1] [2018-10-04 12:20:30,403 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:30,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:30,403 INFO L82 PathProgramCache]: Analyzing trace with hash -155129459, now seen corresponding path program 82 times [2018-10-04 12:20:30,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:30,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:30,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:30,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:30,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 985 proven. 3362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:31,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:31,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:31,258 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:20:31,361 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:20:31,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:31,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 985 proven. 3362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:31,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:31,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 12:20:31,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 12:20:31,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 12:20:31,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:20:31,429 INFO L87 Difference]: Start difference. First operand 216 states and 218 transitions. Second operand 45 states. [2018-10-04 12:20:31,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:31,726 INFO L93 Difference]: Finished difference Result 230 states and 233 transitions. [2018-10-04 12:20:31,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 12:20:31,726 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 213 [2018-10-04 12:20:31,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:31,728 INFO L225 Difference]: With dead ends: 230 [2018-10-04 12:20:31,728 INFO L226 Difference]: Without dead ends: 224 [2018-10-04 12:20:31,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:20:31,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2018-10-04 12:20:31,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2018-10-04 12:20:31,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-04 12:20:31,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2018-10-04 12:20:31,750 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 213 [2018-10-04 12:20:31,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:31,750 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2018-10-04 12:20:31,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 12:20:31,751 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2018-10-04 12:20:31,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-10-04 12:20:31,752 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:31,752 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 1, 1, 1, 1, 1] [2018-10-04 12:20:31,752 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:31,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:31,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1531687293, now seen corresponding path program 83 times [2018-10-04 12:20:31,753 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:31,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:31,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:31,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:31,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4515 backedges. 3612 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:33,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:33,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:33,922 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:20:34,067 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-04 12:20:34,068 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:34,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4515 backedges. 3612 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:34,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:34,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-04 12:20:34,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 12:20:34,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 12:20:34,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1979, Invalid=5677, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 12:20:34,135 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand 88 states. [2018-10-04 12:20:36,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:36,950 INFO L93 Difference]: Finished difference Result 400 states and 404 transitions. [2018-10-04 12:20:36,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-04 12:20:36,950 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 217 [2018-10-04 12:20:36,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:36,951 INFO L225 Difference]: With dead ends: 400 [2018-10-04 12:20:36,951 INFO L226 Difference]: Without dead ends: 221 [2018-10-04 12:20:36,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2667 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3957, Invalid=13073, Unknown=0, NotChecked=0, Total=17030 [2018-10-04 12:20:36,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-04 12:20:36,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-10-04 12:20:36,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-04 12:20:36,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2018-10-04 12:20:36,973 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 217 [2018-10-04 12:20:36,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:36,973 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2018-10-04 12:20:36,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 12:20:36,973 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2018-10-04 12:20:36,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-04 12:20:36,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:36,974 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 1, 1, 1, 1, 1] [2018-10-04 12:20:36,974 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:36,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:36,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1128490282, now seen corresponding path program 84 times [2018-10-04 12:20:36,974 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:36,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:36,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:36,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:36,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 1030 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:37,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:37,819 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:37,828 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:20:37,996 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-04 12:20:37,996 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:38,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 1030 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:38,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:38,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 12:20:38,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 12:20:38,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 12:20:38,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:20:38,081 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand 46 states. [2018-10-04 12:20:38,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:38,351 INFO L93 Difference]: Finished difference Result 235 states and 238 transitions. [2018-10-04 12:20:38,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 12:20:38,352 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 218 [2018-10-04 12:20:38,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:38,353 INFO L225 Difference]: With dead ends: 235 [2018-10-04 12:20:38,353 INFO L226 Difference]: Without dead ends: 229 [2018-10-04 12:20:38,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:20:38,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-10-04 12:20:38,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 225. [2018-10-04 12:20:38,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-10-04 12:20:38,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2018-10-04 12:20:38,374 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 218 [2018-10-04 12:20:38,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:38,374 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2018-10-04 12:20:38,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 12:20:38,375 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2018-10-04 12:20:38,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-04 12:20:38,375 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:38,375 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 1, 1, 1, 1, 1] [2018-10-04 12:20:38,376 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:38,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:38,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1373260896, now seen corresponding path program 85 times [2018-10-04 12:20:38,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:38,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:38,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:38,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:38,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4730 backedges. 3784 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:40,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:40,980 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:40,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:20:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:41,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4730 backedges. 3784 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:41,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:41,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-04 12:20:41,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 12:20:41,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 12:20:41,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 12:20:41,168 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand 90 states. [2018-10-04 12:20:44,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:44,071 INFO L93 Difference]: Finished difference Result 409 states and 413 transitions. [2018-10-04 12:20:44,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-04 12:20:44,071 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 222 [2018-10-04 12:20:44,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:44,072 INFO L225 Difference]: With dead ends: 409 [2018-10-04 12:20:44,072 INFO L226 Difference]: Without dead ends: 226 [2018-10-04 12:20:44,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4137, Invalid=13685, Unknown=0, NotChecked=0, Total=17822 [2018-10-04 12:20:44,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-10-04 12:20:44,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2018-10-04 12:20:44,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-10-04 12:20:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 228 transitions. [2018-10-04 12:20:44,095 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 228 transitions. Word has length 222 [2018-10-04 12:20:44,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:44,095 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 228 transitions. [2018-10-04 12:20:44,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 12:20:44,095 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 228 transitions. [2018-10-04 12:20:44,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-04 12:20:44,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:44,096 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 43, 1, 1, 1, 1, 1] [2018-10-04 12:20:44,096 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:44,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:44,096 INFO L82 PathProgramCache]: Analyzing trace with hash 2022550873, now seen corresponding path program 86 times [2018-10-04 12:20:44,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:44,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:44,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:44,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:20:44,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 1076 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:45,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:45,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:45,313 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:20:45,416 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:20:45,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:45,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 1076 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:45,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:45,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 12:20:45,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:20:45,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:20:45,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:20:45,505 INFO L87 Difference]: Start difference. First operand 226 states and 228 transitions. Second operand 47 states. [2018-10-04 12:20:45,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:45,804 INFO L93 Difference]: Finished difference Result 240 states and 243 transitions. [2018-10-04 12:20:45,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:20:45,805 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 223 [2018-10-04 12:20:45,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:45,806 INFO L225 Difference]: With dead ends: 240 [2018-10-04 12:20:45,806 INFO L226 Difference]: Without dead ends: 234 [2018-10-04 12:20:45,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:20:45,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-04 12:20:45,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 230. [2018-10-04 12:20:45,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-10-04 12:20:45,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 232 transitions. [2018-10-04 12:20:45,828 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 232 transitions. Word has length 223 [2018-10-04 12:20:45,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:45,828 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 232 transitions. [2018-10-04 12:20:45,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:20:45,828 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 232 transitions. [2018-10-04 12:20:45,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-10-04 12:20:45,829 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:45,829 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 1, 1, 1, 1, 1] [2018-10-04 12:20:45,829 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:45,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:45,830 INFO L82 PathProgramCache]: Analyzing trace with hash 664947791, now seen corresponding path program 87 times [2018-10-04 12:20:45,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:45,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:45,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:45,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:45,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 3960 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:48,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:48,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:48,240 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:20:48,424 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-04 12:20:48,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:48,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 3960 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:48,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:48,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-04 12:20:48,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 12:20:48,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 12:20:48,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2161, Invalid=6211, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 12:20:48,515 INFO L87 Difference]: Start difference. First operand 230 states and 232 transitions. Second operand 92 states. [2018-10-04 12:20:51,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:51,825 INFO L93 Difference]: Finished difference Result 418 states and 422 transitions. [2018-10-04 12:20:51,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-04 12:20:51,825 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 227 [2018-10-04 12:20:51,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:51,826 INFO L225 Difference]: With dead ends: 418 [2018-10-04 12:20:51,826 INFO L226 Difference]: Without dead ends: 231 [2018-10-04 12:20:51,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4321, Invalid=14311, Unknown=0, NotChecked=0, Total=18632 [2018-10-04 12:20:51,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-04 12:20:51,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-10-04 12:20:51,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-10-04 12:20:51,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2018-10-04 12:20:51,849 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 227 [2018-10-04 12:20:51,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:51,849 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2018-10-04 12:20:51,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 12:20:51,849 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2018-10-04 12:20:51,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-10-04 12:20:51,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:51,850 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 44, 44, 1, 1, 1, 1, 1] [2018-10-04 12:20:51,850 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:51,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:51,851 INFO L82 PathProgramCache]: Analyzing trace with hash -402751946, now seen corresponding path program 88 times [2018-10-04 12:20:51,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:51,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:51,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:51,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:51,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 1123 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:52,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:52,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:52,797 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:20:52,912 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:20:52,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:52,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 1123 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:52,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:52,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 12:20:52,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 12:20:52,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 12:20:52,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:20:52,986 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 48 states. [2018-10-04 12:20:53,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:53,299 INFO L93 Difference]: Finished difference Result 245 states and 248 transitions. [2018-10-04 12:20:53,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 12:20:53,308 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 228 [2018-10-04 12:20:53,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:53,309 INFO L225 Difference]: With dead ends: 245 [2018-10-04 12:20:53,309 INFO L226 Difference]: Without dead ends: 239 [2018-10-04 12:20:53,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:20:53,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-10-04 12:20:53,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2018-10-04 12:20:53,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-10-04 12:20:53,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2018-10-04 12:20:53,337 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 228 [2018-10-04 12:20:53,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:53,337 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2018-10-04 12:20:53,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 12:20:53,337 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2018-10-04 12:20:53,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-04 12:20:53,338 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:53,338 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 45, 1, 1, 1, 1, 1] [2018-10-04 12:20:53,339 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:53,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:53,339 INFO L82 PathProgramCache]: Analyzing trace with hash -564828500, now seen corresponding path program 89 times [2018-10-04 12:20:53,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:53,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:53,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:53,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:53,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5175 backedges. 4140 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:56,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:56,076 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:56,083 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:20:56,236 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-04 12:20:56,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:56,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5175 backedges. 4140 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:56,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:56,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-04 12:20:56,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 12:20:56,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 12:20:56,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 12:20:56,314 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand 94 states. [2018-10-04 12:20:59,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:59,536 INFO L93 Difference]: Finished difference Result 427 states and 431 transitions. [2018-10-04 12:20:59,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-04 12:20:59,536 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 232 [2018-10-04 12:20:59,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:59,537 INFO L225 Difference]: With dead ends: 427 [2018-10-04 12:20:59,537 INFO L226 Difference]: Without dead ends: 236 [2018-10-04 12:20:59,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4509, Invalid=14951, Unknown=0, NotChecked=0, Total=19460 [2018-10-04 12:20:59,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2018-10-04 12:20:59,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2018-10-04 12:20:59,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-10-04 12:20:59,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 238 transitions. [2018-10-04 12:20:59,590 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 238 transitions. Word has length 232 [2018-10-04 12:20:59,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:59,591 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 238 transitions. [2018-10-04 12:20:59,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 12:20:59,591 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 238 transitions. [2018-10-04 12:20:59,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-10-04 12:20:59,591 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:59,592 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 45, 45, 1, 1, 1, 1, 1] [2018-10-04 12:20:59,592 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:59,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:59,592 INFO L82 PathProgramCache]: Analyzing trace with hash 522145061, now seen corresponding path program 90 times [2018-10-04 12:20:59,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:59,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:59,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:59,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:59,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 1171 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:00,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:00,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:00,750 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:21:00,917 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-04 12:21:00,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:00,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:00,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 1171 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:00,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:00,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 12:21:00,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 12:21:00,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 12:21:00,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:21:00,990 INFO L87 Difference]: Start difference. First operand 236 states and 238 transitions. Second operand 49 states. [2018-10-04 12:21:01,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:01,350 INFO L93 Difference]: Finished difference Result 250 states and 253 transitions. [2018-10-04 12:21:01,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 12:21:01,359 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 233 [2018-10-04 12:21:01,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:01,360 INFO L225 Difference]: With dead ends: 250 [2018-10-04 12:21:01,360 INFO L226 Difference]: Without dead ends: 244 [2018-10-04 12:21:01,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:21:01,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-10-04 12:21:01,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2018-10-04 12:21:01,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-10-04 12:21:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2018-10-04 12:21:01,386 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 233 [2018-10-04 12:21:01,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:01,386 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2018-10-04 12:21:01,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 12:21:01,386 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2018-10-04 12:21:01,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-10-04 12:21:01,387 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:01,387 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 1, 1, 1, 1, 1] [2018-10-04 12:21:01,388 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:01,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:01,388 INFO L82 PathProgramCache]: Analyzing trace with hash -377018853, now seen corresponding path program 91 times [2018-10-04 12:21:01,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:01,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:01,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:01,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:01,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:04,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 4324 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:04,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:04,427 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:04,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:21:04,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:04,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 4324 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:04,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:04,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-04 12:21:04,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 12:21:04,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 12:21:04,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=6769, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 12:21:04,621 INFO L87 Difference]: Start difference. First operand 240 states and 242 transitions. Second operand 96 states. [2018-10-04 12:21:08,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:08,058 INFO L93 Difference]: Finished difference Result 436 states and 440 transitions. [2018-10-04 12:21:08,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-04 12:21:08,058 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 237 [2018-10-04 12:21:08,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:08,059 INFO L225 Difference]: With dead ends: 436 [2018-10-04 12:21:08,059 INFO L226 Difference]: Without dead ends: 241 [2018-10-04 12:21:08,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3197 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4701, Invalid=15605, Unknown=0, NotChecked=0, Total=20306 [2018-10-04 12:21:08,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-10-04 12:21:08,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-10-04 12:21:08,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-10-04 12:21:08,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 243 transitions. [2018-10-04 12:21:08,083 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 243 transitions. Word has length 237 [2018-10-04 12:21:08,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:08,084 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 243 transitions. [2018-10-04 12:21:08,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 12:21:08,084 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 243 transitions. [2018-10-04 12:21:08,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-04 12:21:08,084 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:08,085 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1, 1, 1, 1] [2018-10-04 12:21:08,085 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:08,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:08,085 INFO L82 PathProgramCache]: Analyzing trace with hash 125264706, now seen corresponding path program 92 times [2018-10-04 12:21:08,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:08,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:08,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:08,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:21:08,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 1220 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:09,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:09,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:09,096 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:21:09,204 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:21:09,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:09,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 1220 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:09,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:09,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 12:21:09,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:21:09,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:21:09,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:21:09,295 INFO L87 Difference]: Start difference. First operand 241 states and 243 transitions. Second operand 50 states. [2018-10-04 12:21:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:09,645 INFO L93 Difference]: Finished difference Result 255 states and 258 transitions. [2018-10-04 12:21:09,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 12:21:09,645 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 238 [2018-10-04 12:21:09,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:09,646 INFO L225 Difference]: With dead ends: 255 [2018-10-04 12:21:09,646 INFO L226 Difference]: Without dead ends: 249 [2018-10-04 12:21:09,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:21:09,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-10-04 12:21:09,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 245. [2018-10-04 12:21:09,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-10-04 12:21:09,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2018-10-04 12:21:09,670 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 238 [2018-10-04 12:21:09,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:09,670 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2018-10-04 12:21:09,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:21:09,670 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2018-10-04 12:21:09,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-10-04 12:21:09,671 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:09,671 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 47, 1, 1, 1, 1, 1] [2018-10-04 12:21:09,672 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:09,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:09,672 INFO L82 PathProgramCache]: Analyzing trace with hash 494724536, now seen corresponding path program 93 times [2018-10-04 12:21:09,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:09,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:09,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:09,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:09,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5640 backedges. 4512 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:12,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:12,642 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:12,651 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:21:12,854 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-04 12:21:12,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:12,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5640 backedges. 4512 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:12,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:12,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-04 12:21:12,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 12:21:12,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 12:21:12,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 12:21:12,933 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand 98 states. [2018-10-04 12:21:16,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:16,631 INFO L93 Difference]: Finished difference Result 445 states and 449 transitions. [2018-10-04 12:21:16,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-04 12:21:16,631 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 242 [2018-10-04 12:21:16,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:16,632 INFO L225 Difference]: With dead ends: 445 [2018-10-04 12:21:16,632 INFO L226 Difference]: Without dead ends: 246 [2018-10-04 12:21:16,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3337 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4897, Invalid=16273, Unknown=0, NotChecked=0, Total=21170 [2018-10-04 12:21:16,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-10-04 12:21:16,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-10-04 12:21:16,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-10-04 12:21:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 248 transitions. [2018-10-04 12:21:16,666 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 248 transitions. Word has length 242 [2018-10-04 12:21:16,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:16,666 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 248 transitions. [2018-10-04 12:21:16,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 12:21:16,666 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 248 transitions. [2018-10-04 12:21:16,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-04 12:21:16,667 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:16,667 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 47, 47, 1, 1, 1, 1, 1] [2018-10-04 12:21:16,667 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:16,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:16,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1883780879, now seen corresponding path program 94 times [2018-10-04 12:21:16,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:16,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:16,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:16,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:16,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 1270 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:17,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:17,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:17,712 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:21:17,852 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:21:17,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:17,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 1270 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:17,932 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:17,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 12:21:17,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 12:21:17,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 12:21:17,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 12:21:17,933 INFO L87 Difference]: Start difference. First operand 246 states and 248 transitions. Second operand 51 states. [2018-10-04 12:21:18,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:18,247 INFO L93 Difference]: Finished difference Result 260 states and 263 transitions. [2018-10-04 12:21:18,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 12:21:18,247 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 243 [2018-10-04 12:21:18,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:18,248 INFO L225 Difference]: With dead ends: 260 [2018-10-04 12:21:18,248 INFO L226 Difference]: Without dead ends: 254 [2018-10-04 12:21:18,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 12:21:18,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-10-04 12:21:18,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 250. [2018-10-04 12:21:18,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-10-04 12:21:18,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 252 transitions. [2018-10-04 12:21:18,271 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 252 transitions. Word has length 243 [2018-10-04 12:21:18,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:18,271 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 252 transitions. [2018-10-04 12:21:18,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 12:21:18,272 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 252 transitions. [2018-10-04 12:21:18,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-10-04 12:21:18,272 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:18,272 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 48, 1, 1, 1, 1, 1] [2018-10-04 12:21:18,273 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:18,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:18,273 INFO L82 PathProgramCache]: Analyzing trace with hash 514120679, now seen corresponding path program 95 times [2018-10-04 12:21:18,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:18,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:18,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:18,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:18,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5880 backedges. 4704 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:21,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:21,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:21,374 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:21:21,557 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-04 12:21:21,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:21,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5880 backedges. 4704 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:21,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:21,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-04 12:21:21,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 12:21:21,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 12:21:21,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2549, Invalid=7351, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 12:21:21,638 INFO L87 Difference]: Start difference. First operand 250 states and 252 transitions. Second operand 100 states. [2018-10-04 12:21:25,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:25,573 INFO L93 Difference]: Finished difference Result 454 states and 458 transitions. [2018-10-04 12:21:25,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-04 12:21:25,573 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 247 [2018-10-04 12:21:25,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:25,574 INFO L225 Difference]: With dead ends: 454 [2018-10-04 12:21:25,574 INFO L226 Difference]: Without dead ends: 251 [2018-10-04 12:21:25,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3480 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5097, Invalid=16955, Unknown=0, NotChecked=0, Total=22052 [2018-10-04 12:21:25,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-10-04 12:21:25,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-10-04 12:21:25,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-10-04 12:21:25,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 253 transitions. [2018-10-04 12:21:25,603 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 253 transitions. Word has length 247 [2018-10-04 12:21:25,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:25,604 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 253 transitions. [2018-10-04 12:21:25,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 12:21:25,604 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 253 transitions. [2018-10-04 12:21:25,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-10-04 12:21:25,604 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:25,605 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 48, 48, 1, 1, 1, 1, 1] [2018-10-04 12:21:25,605 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:25,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:25,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1107028914, now seen corresponding path program 96 times [2018-10-04 12:21:25,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:25,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:25,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:25,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:25,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 1321 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:26,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:26,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:26,694 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:21:26,889 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-04 12:21:26,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:26,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:26,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 1321 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:26,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:26,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 12:21:26,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 12:21:26,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 12:21:26,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:21:26,968 INFO L87 Difference]: Start difference. First operand 251 states and 253 transitions. Second operand 52 states. [2018-10-04 12:21:27,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:27,311 INFO L93 Difference]: Finished difference Result 265 states and 268 transitions. [2018-10-04 12:21:27,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 12:21:27,311 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 248 [2018-10-04 12:21:27,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:27,312 INFO L225 Difference]: With dead ends: 265 [2018-10-04 12:21:27,312 INFO L226 Difference]: Without dead ends: 259 [2018-10-04 12:21:27,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:21:27,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-10-04 12:21:27,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 255. [2018-10-04 12:21:27,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-10-04 12:21:27,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 257 transitions. [2018-10-04 12:21:27,339 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 257 transitions. Word has length 248 [2018-10-04 12:21:27,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:27,339 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 257 transitions. [2018-10-04 12:21:27,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 12:21:27,339 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 257 transitions. [2018-10-04 12:21:27,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-10-04 12:21:27,340 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:27,340 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 49, 1, 1, 1, 1, 1] [2018-10-04 12:21:27,341 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:27,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:27,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1827811524, now seen corresponding path program 97 times [2018-10-04 12:21:27,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:27,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:27,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:27,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:27,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6125 backedges. 4900 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:30,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:30,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:30,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:21:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:30,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6125 backedges. 4900 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:30,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:30,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-04 12:21:30,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 12:21:30,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 12:21:30,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 12:21:30,402 INFO L87 Difference]: Start difference. First operand 255 states and 257 transitions. Second operand 102 states. [2018-10-04 12:21:33,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:33,512 INFO L93 Difference]: Finished difference Result 463 states and 467 transitions. [2018-10-04 12:21:33,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-04 12:21:33,512 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 252 [2018-10-04 12:21:33,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:33,513 INFO L225 Difference]: With dead ends: 463 [2018-10-04 12:21:33,513 INFO L226 Difference]: Without dead ends: 256 [2018-10-04 12:21:33,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5301, Invalid=17651, Unknown=0, NotChecked=0, Total=22952 [2018-10-04 12:21:33,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-10-04 12:21:33,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2018-10-04 12:21:33,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-04 12:21:33,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 258 transitions. [2018-10-04 12:21:33,542 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 258 transitions. Word has length 252 [2018-10-04 12:21:33,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:33,542 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 258 transitions. [2018-10-04 12:21:33,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 12:21:33,542 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 258 transitions. [2018-10-04 12:21:33,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-10-04 12:21:33,543 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:33,543 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 49, 49, 1, 1, 1, 1, 1] [2018-10-04 12:21:33,544 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:33,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:33,544 INFO L82 PathProgramCache]: Analyzing trace with hash -803659587, now seen corresponding path program 98 times [2018-10-04 12:21:33,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:33,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:33,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:33,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:21:33,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 1373 proven. 4802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:34,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:34,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:34,701 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:21:34,819 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:21:34,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:34,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 1373 proven. 4802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:34,895 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:34,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 12:21:34,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:21:34,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:21:34,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:21:34,897 INFO L87 Difference]: Start difference. First operand 256 states and 258 transitions. Second operand 53 states. [2018-10-04 12:21:35,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:35,211 INFO L93 Difference]: Finished difference Result 270 states and 273 transitions. [2018-10-04 12:21:35,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 12:21:35,212 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 253 [2018-10-04 12:21:35,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:35,213 INFO L225 Difference]: With dead ends: 270 [2018-10-04 12:21:35,213 INFO L226 Difference]: Without dead ends: 264 [2018-10-04 12:21:35,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:21:35,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-10-04 12:21:35,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 260. [2018-10-04 12:21:35,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2018-10-04 12:21:35,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 262 transitions. [2018-10-04 12:21:35,244 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 262 transitions. Word has length 253 [2018-10-04 12:21:35,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:35,244 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 262 transitions. [2018-10-04 12:21:35,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:21:35,244 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 262 transitions. [2018-10-04 12:21:35,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-10-04 12:21:35,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:35,245 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 50, 1, 1, 1, 1, 1] [2018-10-04 12:21:35,245 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:35,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:35,245 INFO L82 PathProgramCache]: Analyzing trace with hash 465399219, now seen corresponding path program 99 times [2018-10-04 12:21:35,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:35,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:35,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:35,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:35,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6375 backedges. 5100 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:38,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:38,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:38,696 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:21:38,912 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-10-04 12:21:38,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:38,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6375 backedges. 5100 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:38,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:38,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-04 12:21:38,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-04 12:21:38,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-04 12:21:38,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2755, Invalid=7957, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 12:21:38,995 INFO L87 Difference]: Start difference. First operand 260 states and 262 transitions. Second operand 104 states. [2018-10-04 12:21:43,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:43,073 INFO L93 Difference]: Finished difference Result 472 states and 476 transitions. [2018-10-04 12:21:43,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-04 12:21:43,074 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 257 [2018-10-04 12:21:43,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:43,075 INFO L225 Difference]: With dead ends: 472 [2018-10-04 12:21:43,075 INFO L226 Difference]: Without dead ends: 261 [2018-10-04 12:21:43,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3775 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5509, Invalid=18361, Unknown=0, NotChecked=0, Total=23870 [2018-10-04 12:21:43,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-10-04 12:21:43,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-10-04 12:21:43,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-10-04 12:21:43,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 263 transitions. [2018-10-04 12:21:43,103 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 263 transitions. Word has length 257 [2018-10-04 12:21:43,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:43,103 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 263 transitions. [2018-10-04 12:21:43,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-04 12:21:43,103 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 263 transitions. [2018-10-04 12:21:43,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-10-04 12:21:43,104 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:43,104 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 50, 50, 1, 1, 1, 1, 1] [2018-10-04 12:21:43,104 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:43,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:43,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1064997210, now seen corresponding path program 100 times [2018-10-04 12:21:43,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:43,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:43,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:43,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:43,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 1426 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:44,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:44,297 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:44,303 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:21:44,433 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:21:44,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:44,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 1426 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:44,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:44,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 12:21:44,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 12:21:44,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 12:21:44,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:21:44,531 INFO L87 Difference]: Start difference. First operand 261 states and 263 transitions. Second operand 54 states. [2018-10-04 12:21:44,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:44,868 INFO L93 Difference]: Finished difference Result 275 states and 278 transitions. [2018-10-04 12:21:44,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 12:21:44,868 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 258 [2018-10-04 12:21:44,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:44,869 INFO L225 Difference]: With dead ends: 275 [2018-10-04 12:21:44,869 INFO L226 Difference]: Without dead ends: 269 [2018-10-04 12:21:44,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:21:44,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-10-04 12:21:44,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 265. [2018-10-04 12:21:44,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-10-04 12:21:44,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 267 transitions. [2018-10-04 12:21:44,897 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 267 transitions. Word has length 258 [2018-10-04 12:21:44,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:44,897 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 267 transitions. [2018-10-04 12:21:44,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 12:21:44,897 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 267 transitions. [2018-10-04 12:21:44,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-10-04 12:21:44,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:44,898 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 51, 1, 1, 1, 1, 1] [2018-10-04 12:21:44,898 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:44,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:44,898 INFO L82 PathProgramCache]: Analyzing trace with hash 629884880, now seen corresponding path program 101 times [2018-10-04 12:21:44,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:44,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:44,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:44,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:44,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:48,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6630 backedges. 5304 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:48,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:48,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:48,270 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:21:48,620 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-10-04 12:21:48,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:48,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:48,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6630 backedges. 5304 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:48,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:48,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-04 12:21:48,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-04 12:21:48,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-04 12:21:48,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2861, Invalid=8269, Unknown=0, NotChecked=0, Total=11130 [2018-10-04 12:21:48,739 INFO L87 Difference]: Start difference. First operand 265 states and 267 transitions. Second operand 106 states. [2018-10-04 12:21:53,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:53,051 INFO L93 Difference]: Finished difference Result 481 states and 485 transitions. [2018-10-04 12:21:53,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-04 12:21:53,051 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 262 [2018-10-04 12:21:53,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:53,052 INFO L225 Difference]: With dead ends: 481 [2018-10-04 12:21:53,052 INFO L226 Difference]: Without dead ends: 266 [2018-10-04 12:21:53,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3927 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5721, Invalid=19085, Unknown=0, NotChecked=0, Total=24806 [2018-10-04 12:21:53,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-10-04 12:21:53,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2018-10-04 12:21:53,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2018-10-04 12:21:53,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 268 transitions. [2018-10-04 12:21:53,084 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 268 transitions. Word has length 262 [2018-10-04 12:21:53,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:53,084 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 268 transitions. [2018-10-04 12:21:53,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-04 12:21:53,084 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 268 transitions. [2018-10-04 12:21:53,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-10-04 12:21:53,085 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:53,085 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 52, 51, 51, 1, 1, 1, 1, 1] [2018-10-04 12:21:53,085 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:53,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:53,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1501211511, now seen corresponding path program 102 times [2018-10-04 12:21:53,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:53,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:53,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:53,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:53,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 1480 proven. 5202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:54,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:54,265 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:54,272 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:21:54,468 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-10-04 12:21:54,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:54,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:54,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 1480 proven. 5202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:54,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:54,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 12:21:54,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 12:21:54,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 12:21:54,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:21:54,565 INFO L87 Difference]: Start difference. First operand 266 states and 268 transitions. Second operand 55 states. [2018-10-04 12:21:54,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:54,933 INFO L93 Difference]: Finished difference Result 280 states and 283 transitions. [2018-10-04 12:21:54,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 12:21:54,933 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 263 [2018-10-04 12:21:54,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:54,934 INFO L225 Difference]: With dead ends: 280 [2018-10-04 12:21:54,934 INFO L226 Difference]: Without dead ends: 274 [2018-10-04 12:21:54,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:21:54,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-10-04 12:21:54,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2018-10-04 12:21:54,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-10-04 12:21:54,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 272 transitions. [2018-10-04 12:21:54,966 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 272 transitions. Word has length 263 [2018-10-04 12:21:54,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:54,966 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 272 transitions. [2018-10-04 12:21:54,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 12:21:54,966 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 272 transitions. [2018-10-04 12:21:54,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-04 12:21:54,967 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:54,967 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 52, 1, 1, 1, 1, 1] [2018-10-04 12:21:54,967 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:54,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:54,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1240278145, now seen corresponding path program 103 times [2018-10-04 12:21:54,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:54,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:54,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:54,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:54,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6890 backedges. 5512 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:58,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:58,472 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:58,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:21:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:58,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:58,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6890 backedges. 5512 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:58,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:58,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-04 12:21:58,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-04 12:21:58,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-04 12:21:58,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2969, Invalid=8587, Unknown=0, NotChecked=0, Total=11556 [2018-10-04 12:21:58,704 INFO L87 Difference]: Start difference. First operand 270 states and 272 transitions. Second operand 108 states. Received shutdown request... [2018-10-04 12:21:58,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 12:21:58,854 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 12:21:58,859 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 12:21:58,859 INFO L202 PluginConnector]: Adding new model down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 12:21:58 BoogieIcfgContainer [2018-10-04 12:21:58,859 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 12:21:58,860 INFO L168 Benchmark]: Toolchain (without parser) took 234141.67 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 82.3 MB). Free memory was 1.4 GB in the beginning and 972.3 MB in the end (delta: 432.0 MB). Peak memory consumption was 514.3 MB. Max. memory is 7.1 GB. [2018-10-04 12:21:58,862 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:21:58,862 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.71 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:21:58,862 INFO L168 Benchmark]: Boogie Preprocessor took 24.04 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:21:58,862 INFO L168 Benchmark]: RCFGBuilder took 382.82 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 12:21:58,863 INFO L168 Benchmark]: TraceAbstraction took 233686.49 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 82.3 MB). Free memory was 1.4 GB in the beginning and 972.3 MB in the end (delta: 410.8 MB). Peak memory consumption was 493.1 MB. Max. memory is 7.1 GB. [2018-10-04 12:21:58,865 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.71 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.04 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 382.82 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 233686.49 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 82.3 MB). Free memory was 1.4 GB in the beginning and 972.3 MB in the end (delta: 410.8 MB). Peak memory consumption was 493.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 76). Cancelled while BasicCegarLoop was constructing difference of abstraction (270states) and FLOYD_HOARE automaton (currently 55 states, 108 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 108 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 233.6s OverallTime, 107 OverallIterations, 53 TraceHistogramMax, 106.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3195 SDtfs, 7616 SDslu, 71015 SDs, 0 SdLazy, 76524 SolverSat, 1658 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 46.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21299 GetRequests, 15624 SyntacticMatches, 0 SemanticMatches, 5674 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71708 ImplicationChecksByTransitivity, 143.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=270occurred in iteration=106, 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: 1.6s AutomataMinimizationTime, 106 MinimizatonAttempts, 214 StatesRemovedByMinimization, 54 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.7s SsaConstructionTime, 8.9s SatisfiabilityAnalysisTime, 108.9s InterpolantComputationTime, 28614 NumberOfCodeBlocks, 28614 NumberOfCodeBlocksAsserted, 1604 NumberOfCheckSat, 28404 ConstructedInterpolants, 0 QuantifiedInterpolants, 14943864 SizeOfPredicates, 207 NumberOfNonLiveVariables, 45579 ConjunctsInSsa, 5769 ConjunctsInUnsatCore, 210 InterpolantComputations, 4 PerfectInterpolantSequences, 253344/485056 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/down.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_12-21-58-874.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_12-21-58-874.csv Completed graceful shutdown