java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 10:30:21,762 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:30:21,764 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:30:21,775 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:30:21,775 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:30:21,776 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:30:21,778 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:30:21,779 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:30:21,781 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:30:21,781 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:30:21,782 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 10:30:21,783 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 10:30:21,784 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 10:30:21,784 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 10:30:21,786 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 10:30:21,786 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 10:30:21,787 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 10:30:21,789 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 10:30:21,791 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 10:30:21,792 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 10:30:21,793 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 10:30:21,795 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 10:30:21,797 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-30 10:30:21,797 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-30 10:30:21,797 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-30 10:30:21,798 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-30 10:30:21,799 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-30 10:30:21,800 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-30 10:30:21,801 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-30 10:30:21,802 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-30 10:30:21,802 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-30 10:30:21,803 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-30 10:30:21,803 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-30 10:30:21,803 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-30 10:30:21,804 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-30 10:30:21,805 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-30 10:30:21,805 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 10:30:21,820 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:30:21,820 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:30:21,821 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:30:21,821 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:30:21,822 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:30:21,822 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:30:21,822 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:30:21,822 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:30:21,823 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:30:21,823 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:30:21,823 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:30:21,823 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:30:21,823 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:30:21,824 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:30:21,824 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:30:21,824 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:30:21,824 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:30:21,824 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:30:21,825 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:30:21,825 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:30:21,825 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:30:21,825 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:30:21,825 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:30:21,826 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:30:21,826 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:30:21,826 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:30:21,826 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:30:21,826 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:30:21,826 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:30:21,827 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:30:21,886 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:30:21,899 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:30:21,903 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:30:21,905 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:30:21,905 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:30:21,906 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-09-30 10:30:21,906 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl' [2018-09-30 10:30:21,952 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:30:21,955 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:30:21,956 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:30:21,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:30:21,957 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:30:21,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:30:21" (1/1) ... [2018-09-30 10:30:21,989 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:30:21" (1/1) ... [2018-09-30 10:30:21,994 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 10:30:21,995 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 10:30:21,995 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 10:30:21,997 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:30:21,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:30:21,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:30:21,998 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:30:22,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:30:21" (1/1) ... [2018-09-30 10:30:22,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:30:21" (1/1) ... [2018-09-30 10:30:22,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:30:21" (1/1) ... [2018-09-30 10:30:22,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:30:21" (1/1) ... [2018-09-30 10:30:22,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:30:21" (1/1) ... [2018-09-30 10:30:22,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:30:21" (1/1) ... [2018-09-30 10:30:22,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:30:21" (1/1) ... [2018-09-30 10:30:22,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:30:22,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:30:22,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:30:22,019 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:30:22,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:30:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:30:22,092 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 10:30:22,093 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 10:30:22,093 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 10:30:22,260 INFO L345 CfgBuilder]: Using library mode [2018-09-30 10:30:22,260 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:30:22 BoogieIcfgContainer [2018-09-30 10:30:22,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:30:22,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:30:22,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:30:22,268 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:30:22,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:30:21" (1/2) ... [2018-09-30 10:30:22,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d1ba19 and model type DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:30:22, skipping insertion in model container [2018-09-30 10:30:22,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:30:22" (2/2) ... [2018-09-30 10:30:22,273 INFO L112 eAbstractionObserver]: Analyzing ICFG DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-09-30 10:30:22,287 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:30:22,295 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 10:30:22,353 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:30:22,353 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:30:22,354 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:30:22,354 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:30:22,354 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:30:22,354 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:30:22,354 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:30:22,355 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:30:22,355 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:30:22,371 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-30 10:30:22,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-30 10:30:22,386 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:22,388 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-30 10:30:22,389 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:22,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:22,397 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-09-30 10:30:22,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:22,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:22,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:22,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:22,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:22,756 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-09-30 10:30:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:22,760 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:30:22,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 10:30:22,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:30:22,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:30:22,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:30:22,778 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-30 10:30:22,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:22,850 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 10:30:22,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:30:22,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-30 10:30:22,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:22,864 INFO L225 Difference]: With dead ends: 9 [2018-09-30 10:30:22,864 INFO L226 Difference]: Without dead ends: 4 [2018-09-30 10:30:22,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:30:22,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-09-30 10:30:22,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-09-30 10:30:22,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-09-30 10:30:22,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-09-30 10:30:22,902 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-09-30 10:30:22,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:22,902 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-09-30 10:30:22,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:30:22,902 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-09-30 10:30:22,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 10:30:22,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:22,903 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 10:30:22,903 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:22,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:22,903 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-09-30 10:30:22,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:22,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:22,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:22,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:22,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:23,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:23,109 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:23,109 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:23,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:23,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:23,204 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:23,204 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-09-30 10:30:23,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:30:23,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:30:23,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:30:23,206 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 6 states. [2018-09-30 10:30:23,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:23,351 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-09-30 10:30:23,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:30:23,352 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-09-30 10:30:23,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:23,352 INFO L225 Difference]: With dead ends: 6 [2018-09-30 10:30:23,352 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 10:30:23,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:30:23,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 10:30:23,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 10:30:23,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 10:30:23,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 10:30:23,356 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 10:30:23,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:23,358 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 10:30:23,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:30:23,358 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 10:30:23,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 10:30:23,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:23,359 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-09-30 10:30:23,359 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:23,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:23,360 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-09-30 10:30:23,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:23,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:23,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:23,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:23,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:23,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:23,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:23,640 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:30:23,649 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:30:23,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:23,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:23,814 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:23,814 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-09-30 10:30:23,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:30:23,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:30:23,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:30:23,816 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 8 states. [2018-09-30 10:30:23,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:23,856 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-09-30 10:30:23,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:30:23,857 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-09-30 10:30:23,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:23,858 INFO L225 Difference]: With dead ends: 7 [2018-09-30 10:30:23,858 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 10:30:23,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:30:23,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 10:30:23,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 10:30:23,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 10:30:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 10:30:23,863 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 10:30:23,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:23,864 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 10:30:23,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:30:23,864 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 10:30:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 10:30:23,864 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:23,865 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-09-30 10:30:23,865 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:23,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:23,865 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-09-30 10:30:23,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:23,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:23,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:23,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:23,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:24,071 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-09-30 10:30:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:24,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:24,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:24,178 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:30:24,185 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 10:30:24,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:24,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:24,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:24,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-30 10:30:24,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:30:24,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:30:24,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:30:24,328 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 10 states. [2018-09-30 10:30:24,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:24,544 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-30 10:30:24,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:30:24,545 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-09-30 10:30:24,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:24,547 INFO L225 Difference]: With dead ends: 8 [2018-09-30 10:30:24,547 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 10:30:24,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:30:24,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 10:30:24,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 10:30:24,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 10:30:24,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 10:30:24,555 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 10:30:24,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:24,555 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 10:30:24,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:30:24,556 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 10:30:24,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 10:30:24,556 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:24,556 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-09-30 10:30:24,557 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:24,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:24,557 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-09-30 10:30:24,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:24,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:24,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:24,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:24,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:24,776 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-09-30 10:30:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:24,911 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:24,911 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:24,918 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:30:24,928 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:30:24,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:24,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:25,103 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:25,103 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-30 10:30:25,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:30:25,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:30:25,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:30:25,104 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 12 states. [2018-09-30 10:30:25,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:25,181 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 10:30:25,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:30:25,181 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-09-30 10:30:25,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:25,183 INFO L225 Difference]: With dead ends: 9 [2018-09-30 10:30:25,183 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 10:30:25,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:30:25,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 10:30:25,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 10:30:25,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 10:30:25,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 10:30:25,187 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 10:30:25,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:25,187 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 10:30:25,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:30:25,187 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 10:30:25,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:30:25,188 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:25,188 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-09-30 10:30:25,188 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:25,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:25,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-09-30 10:30:25,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:25,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:25,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:25,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:25,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:25,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:25,383 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:25,392 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:30:25,404 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 10:30:25,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:25,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:25,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:25,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-30 10:30:25,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:30:25,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:30:25,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:30:25,699 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 14 states. [2018-09-30 10:30:25,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:25,827 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 10:30:25,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:30:25,828 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2018-09-30 10:30:25,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:25,829 INFO L225 Difference]: With dead ends: 10 [2018-09-30 10:30:25,829 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 10:30:25,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:30:25,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 10:30:25,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 10:30:25,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 10:30:25,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 10:30:25,833 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 10:30:25,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:25,834 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 10:30:25,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:30:25,834 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 10:30:25,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 10:30:25,835 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:25,835 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-09-30 10:30:25,835 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:25,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:25,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-09-30 10:30:25,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:25,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:25,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:25,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:25,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:26,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:26,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:26,028 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:30:26,036 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 10:30:26,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:26,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:26,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:26,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-09-30 10:30:26,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:30:26,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:30:26,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:30:26,375 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 16 states. [2018-09-30 10:30:26,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:26,487 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 10:30:26,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:30:26,488 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 8 [2018-09-30 10:30:26,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:26,488 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:30:26,488 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 10:30:26,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:30:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 10:30:26,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 10:30:26,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 10:30:26,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 10:30:26,493 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 10:30:26,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:26,493 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 10:30:26,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:30:26,494 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 10:30:26,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:30:26,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:26,494 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-09-30 10:30:26,494 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:26,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:26,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-09-30 10:30:26,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:26,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:26,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:26,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:26,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:26,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:26,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:26,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:26,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:26,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:26,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-30 10:30:26,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:30:26,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:30:26,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:30:26,938 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 18 states. [2018-09-30 10:30:27,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:27,077 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 10:30:27,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:30:27,078 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 9 [2018-09-30 10:30:27,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:27,079 INFO L225 Difference]: With dead ends: 12 [2018-09-30 10:30:27,079 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 10:30:27,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:30:27,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 10:30:27,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 10:30:27,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 10:30:27,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 10:30:27,084 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 10:30:27,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:27,085 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 10:30:27,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:30:27,085 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 10:30:27,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:30:27,086 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:27,086 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-09-30 10:30:27,086 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:27,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:27,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-09-30 10:30:27,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:27,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:27,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:27,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:27,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:27,292 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:27,292 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:27,308 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:30:27,324 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:30:27,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:27,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:27,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:27,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-09-30 10:30:27,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:30:27,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:30:27,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:30:27,531 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 20 states. [2018-09-30 10:30:27,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:27,674 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 10:30:27,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:30:27,676 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 10 [2018-09-30 10:30:27,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:27,677 INFO L225 Difference]: With dead ends: 13 [2018-09-30 10:30:27,677 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 10:30:27,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:30:27,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 10:30:27,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 10:30:27,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 10:30:27,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 10:30:27,682 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 10:30:27,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:27,682 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 10:30:27,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:30:27,682 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 10:30:27,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:30:27,683 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:27,683 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-09-30 10:30:27,683 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:27,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:27,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-09-30 10:30:27,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:27,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:27,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:27,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:27,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:27,912 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:27,913 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:27,913 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:27,922 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:30:27,938 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 10:30:27,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:27,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:28,289 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:28,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-09-30 10:30:28,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:30:28,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:30:28,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:30:28,291 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 22 states. [2018-09-30 10:30:28,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:28,450 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 10:30:28,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 10:30:28,450 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 11 [2018-09-30 10:30:28,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:28,451 INFO L225 Difference]: With dead ends: 14 [2018-09-30 10:30:28,451 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 10:30:28,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:30:28,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 10:30:28,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 10:30:28,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 10:30:28,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 10:30:28,456 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-30 10:30:28,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:28,456 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 10:30:28,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:30:28,456 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 10:30:28,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 10:30:28,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:28,457 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-09-30 10:30:28,457 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:28,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:28,458 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-09-30 10:30:28,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:28,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:28,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:28,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:28,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:28,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:28,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:28,816 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:30:28,825 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:30:28,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:28,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:29,118 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:29,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-30 10:30:29,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 10:30:29,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 10:30:29,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:30:29,120 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 24 states. [2018-09-30 10:30:29,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:29,485 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 10:30:29,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:30:29,485 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 12 [2018-09-30 10:30:29,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:29,486 INFO L225 Difference]: With dead ends: 15 [2018-09-30 10:30:29,487 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 10:30:29,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:30:29,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 10:30:29,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 10:30:29,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:30:29,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 10:30:29,491 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-30 10:30:29,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:29,491 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 10:30:29,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 10:30:29,491 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 10:30:29,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:30:29,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:29,492 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-09-30 10:30:29,492 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:29,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:29,492 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-09-30 10:30:29,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:29,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:29,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:29,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:29,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:29,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:29,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:29,842 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:30:29,876 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:30:29,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:29,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:30,340 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:30,340 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-30 10:30:30,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 10:30:30,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 10:30:30,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:30:30,342 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 26 states. [2018-09-30 10:30:30,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:30,890 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 10:30:30,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 10:30:30,891 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 13 [2018-09-30 10:30:30,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:30,892 INFO L225 Difference]: With dead ends: 16 [2018-09-30 10:30:30,892 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 10:30:30,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:30:30,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 10:30:30,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 10:30:30,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 10:30:30,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 10:30:30,897 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-30 10:30:30,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:30,897 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 10:30:30,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 10:30:30,897 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 10:30:30,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:30:30,898 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:30,898 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-09-30 10:30:30,898 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:30,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:30,898 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-09-30 10:30:30,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:30,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:30,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:30,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:30,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:30,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:31,308 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:31,308 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:31,317 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:30:31,334 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:30:31,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:31,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:31,785 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:31,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-09-30 10:30:31,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 10:30:31,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 10:30:31,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:30:31,787 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 28 states. [2018-09-30 10:30:31,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:31,984 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 10:30:31,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 10:30:31,984 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 14 [2018-09-30 10:30:31,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:31,985 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:30:31,985 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 10:30:31,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:30:31,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 10:30:31,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 10:30:31,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:30:31,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 10:30:31,991 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-30 10:30:31,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:31,991 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 10:30:31,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 10:30:31,991 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 10:30:31,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:30:31,992 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:31,992 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-09-30 10:30:31,992 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:31,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:31,993 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-09-30 10:30:31,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:31,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:31,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:31,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:31,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:32,137 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2018-09-30 10:30:32,465 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-30 10:30:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:32,617 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:32,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:32,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:32,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:33,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:33,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-30 10:30:33,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 10:30:33,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 10:30:33,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:30:33,035 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 30 states. [2018-09-30 10:30:33,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:33,281 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 10:30:33,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 10:30:33,281 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 15 [2018-09-30 10:30:33,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:33,282 INFO L225 Difference]: With dead ends: 18 [2018-09-30 10:30:33,283 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 10:30:33,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:30:33,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 10:30:33,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 10:30:33,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 10:30:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 10:30:33,287 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-30 10:30:33,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:33,288 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 10:30:33,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 10:30:33,288 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 10:30:33,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 10:30:33,288 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:33,289 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-09-30 10:30:33,289 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:33,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:33,289 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-09-30 10:30:33,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:33,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:33,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:33,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:33,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:33,598 WARN L178 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:30:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:33,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:33,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:33,956 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:30:33,980 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:30:33,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:33,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:34,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:34,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-09-30 10:30:34,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 10:30:34,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 10:30:34,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:30:34,482 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 32 states. [2018-09-30 10:30:34,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:34,771 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 10:30:34,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:30:34,772 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 16 [2018-09-30 10:30:34,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:34,772 INFO L225 Difference]: With dead ends: 19 [2018-09-30 10:30:34,773 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 10:30:34,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:30:34,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 10:30:34,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 10:30:34,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:30:34,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 10:30:34,778 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-30 10:30:34,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:34,778 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 10:30:34,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 10:30:34,779 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 10:30:34,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:30:34,779 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:34,779 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-09-30 10:30:34,780 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:34,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:34,780 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-09-30 10:30:34,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:34,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:34,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:34,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:34,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:35,002 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:30:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:35,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:35,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:35,529 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:30:35,544 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:30:35,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:35,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:35,996 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:36,016 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:36,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-09-30 10:30:36,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 10:30:36,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 10:30:36,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:30:36,018 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 34 states. [2018-09-30 10:30:36,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:36,503 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 10:30:36,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:30:36,504 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 17 [2018-09-30 10:30:36,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:36,505 INFO L225 Difference]: With dead ends: 20 [2018-09-30 10:30:36,505 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 10:30:36,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:30:36,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 10:30:36,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 10:30:36,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 10:30:36,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 10:30:36,510 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-30 10:30:36,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:36,510 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 10:30:36,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 10:30:36,510 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 10:30:36,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:30:36,511 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:36,511 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-09-30 10:30:36,511 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:36,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:36,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-09-30 10:30:36,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:36,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:36,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:36,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:36,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:36,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:36,924 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:36,924 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:36,931 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:30:36,963 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:30:36,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:36,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:37,454 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:37,454 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-30 10:30:37,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 10:30:37,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 10:30:37,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1174, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:30:37,455 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 36 states. [2018-09-30 10:30:37,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:37,746 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 10:30:37,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 10:30:37,747 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 18 [2018-09-30 10:30:37,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:37,748 INFO L225 Difference]: With dead ends: 21 [2018-09-30 10:30:37,748 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 10:30:37,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=1174, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:30:37,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 10:30:37,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 10:30:37,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:30:37,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 10:30:37,753 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-30 10:30:37,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:37,753 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 10:30:37,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 10:30:37,753 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 10:30:37,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:30:37,754 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:37,754 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-09-30 10:30:37,754 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:37,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:37,754 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-09-30 10:30:37,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:37,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:37,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:37,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:37,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:38,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:38,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:38,151 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:30:38,168 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 10:30:38,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:38,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:38,657 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:38,657 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-09-30 10:30:38,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 10:30:38,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 10:30:38,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:30:38,658 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 38 states. [2018-09-30 10:30:39,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:39,197 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 10:30:39,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 10:30:39,198 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 19 [2018-09-30 10:30:39,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:39,198 INFO L225 Difference]: With dead ends: 22 [2018-09-30 10:30:39,199 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:30:39,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:30:39,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:30:39,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 10:30:39,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 10:30:39,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 10:30:39,205 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-30 10:30:39,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:39,205 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 10:30:39,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 10:30:39,205 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 10:30:39,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 10:30:39,206 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:39,206 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-09-30 10:30:39,206 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:39,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:39,207 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-09-30 10:30:39,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:39,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:39,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:39,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:39,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:39,722 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:39,722 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:39,732 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:30:39,746 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 10:30:39,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:39,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:40,649 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:40,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-09-30 10:30:40,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 10:30:40,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 10:30:40,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:30:40,651 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 40 states. [2018-09-30 10:30:41,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:41,479 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 10:30:41,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:30:41,480 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 20 [2018-09-30 10:30:41,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:41,481 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:30:41,481 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 10:30:41,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:30:41,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 10:30:41,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 10:30:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:30:41,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 10:30:41,486 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-30 10:30:41,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:41,486 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 10:30:41,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 10:30:41,487 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 10:30:41,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:30:41,487 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:41,487 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-09-30 10:30:41,487 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:41,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:41,488 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-09-30 10:30:41,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:41,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:41,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:41,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:41,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:41,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:41,933 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:41,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:41,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:41,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:41,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:42,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:42,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-30 10:30:42,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 10:30:42,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 10:30:42,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1621, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:30:42,791 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 42 states. [2018-09-30 10:30:43,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:43,214 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 10:30:43,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 10:30:43,215 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 21 [2018-09-30 10:30:43,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:43,216 INFO L225 Difference]: With dead ends: 24 [2018-09-30 10:30:43,216 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:30:43,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=101, Invalid=1621, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:30:43,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:30:43,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 10:30:43,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 10:30:43,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 10:30:43,221 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-30 10:30:43,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:43,222 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 10:30:43,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 10:30:43,222 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 10:30:43,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 10:30:43,223 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:43,223 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-09-30 10:30:43,223 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:43,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:43,223 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-09-30 10:30:43,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:43,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:43,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:43,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:43,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:43,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:43,567 WARN L178 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:30:43,761 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 10:30:44,284 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:44,284 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:44,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:44,291 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:30:44,317 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:30:44,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:44,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:45,052 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:45,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-09-30 10:30:45,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 10:30:45,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 10:30:45,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:30:45,054 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 44 states. [2018-09-30 10:30:45,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:45,674 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 10:30:45,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:30:45,674 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 22 [2018-09-30 10:30:45,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:45,675 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:30:45,675 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 10:30:45,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:30:45,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 10:30:45,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 10:30:45,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:30:45,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 10:30:45,681 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-30 10:30:45,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:45,682 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 10:30:45,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 10:30:45,682 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 10:30:45,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 10:30:45,682 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:45,683 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-09-30 10:30:45,683 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:45,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:45,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-09-30 10:30:45,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:45,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:45,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:45,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:45,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:46,281 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:46,281 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 [2018-09-30 10:30:46,299 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:30:46,318 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 10:30:46,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:46,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:47,291 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:47,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:47,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-09-30 10:30:47,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 10:30:47,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 10:30:47,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1959, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:30:47,313 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 46 states. [2018-09-30 10:30:47,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:47,879 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 10:30:47,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:30:47,883 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 23 [2018-09-30 10:30:47,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:47,884 INFO L225 Difference]: With dead ends: 26 [2018-09-30 10:30:47,884 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:30:47,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=1959, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:30:47,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:30:47,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 10:30:47,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 10:30:47,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 10:30:47,888 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-30 10:30:47,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:47,889 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 10:30:47,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 10:30:47,889 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 10:30:47,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 10:30:47,890 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:47,890 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-09-30 10:30:47,890 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:47,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:47,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-09-30 10:30:47,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:47,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:47,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:47,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:47,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:48,215 WARN L178 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:30:48,411 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 10:30:48,611 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 10:30:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:49,399 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:49,399 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:49,407 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:30:49,423 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:30:49,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:49,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:50,325 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:50,346 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:50,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-30 10:30:50,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 10:30:50,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 10:30:50,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2140, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:30:50,348 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 48 states. [2018-09-30 10:30:51,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:51,165 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 10:30:51,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:30:51,165 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 24 [2018-09-30 10:30:51,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:51,166 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:30:51,166 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 10:30:51,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=116, Invalid=2140, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:30:51,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 10:30:51,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 10:30:51,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:30:51,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 10:30:51,171 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-30 10:30:51,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:51,172 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 10:30:51,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 10:30:51,172 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 10:30:51,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 10:30:51,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:51,172 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-09-30 10:30:51,173 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:51,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:51,173 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-09-30 10:30:51,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:51,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:51,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:51,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:51,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:51,366 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:30:51,872 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:51,872 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:51,872 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:51,879 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:30:51,899 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 10:30:51,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:51,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:52,948 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:52,968 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:52,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-30 10:30:52,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 10:30:52,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 10:30:52,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2329, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:30:52,970 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 50 states. [2018-09-30 10:30:53,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:53,613 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 10:30:53,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:30:53,613 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 25 [2018-09-30 10:30:53,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:53,614 INFO L225 Difference]: With dead ends: 28 [2018-09-30 10:30:53,614 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:30:53,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=121, Invalid=2329, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:30:53,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:30:53,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 10:30:53,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 10:30:53,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 10:30:53,619 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-30 10:30:53,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:53,620 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 10:30:53,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 10:30:53,620 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 10:30:53,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 10:30:53,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:53,621 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-09-30 10:30:53,621 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:53,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:53,621 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-09-30 10:30:53,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:53,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:53,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:53,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:53,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:54,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:54,216 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:54,223 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:30:54,242 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 10:30:54,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:54,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:55,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:55,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-09-30 10:30:55,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 10:30:55,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 10:30:55,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2526, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:30:55,707 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 52 states. [2018-09-30 10:30:56,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:56,366 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 10:30:56,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:30:56,366 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 26 [2018-09-30 10:30:56,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:56,367 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:30:56,367 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 10:30:56,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=126, Invalid=2526, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:30:56,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 10:30:56,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 10:30:56,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:30:56,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 10:30:56,374 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-30 10:30:56,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:56,374 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 10:30:56,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 10:30:56,375 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 10:30:56,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 10:30:56,375 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:56,375 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-09-30 10:30:56,375 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:56,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:56,376 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-09-30 10:30:56,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:56,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:56,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:56,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:56,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:57,107 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:57,107 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:57,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:57,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:58,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:58,060 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-30 10:30:58,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 10:30:58,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 10:30:58,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2731, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:30:58,062 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 54 states. [2018-09-30 10:30:58,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:58,653 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 10:30:58,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 10:30:58,653 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 27 [2018-09-30 10:30:58,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:58,654 INFO L225 Difference]: With dead ends: 30 [2018-09-30 10:30:58,654 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:30:58,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=131, Invalid=2731, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:30:58,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:30:58,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 10:30:58,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 10:30:58,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 10:30:58,661 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-30 10:30:58,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:58,661 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 10:30:58,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 10:30:58,661 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 10:30:58,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 10:30:58,662 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:58,662 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-09-30 10:30:58,662 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:58,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:58,662 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-09-30 10:30:58,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:58,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:58,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:58,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:58,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:59,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:59,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:59,420 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:30:59,437 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:30:59,438 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:59,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:00,509 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:00,510 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-09-30 10:31:00,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 10:31:00,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 10:31:00,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2944, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:31:00,511 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 56 states. [2018-09-30 10:31:01,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:01,246 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 10:31:01,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:31:01,246 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 28 [2018-09-30 10:31:01,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:01,247 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:31:01,247 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 10:31:01,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=136, Invalid=2944, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:31:01,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 10:31:01,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 10:31:01,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:31:01,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 10:31:01,253 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-30 10:31:01,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:01,253 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 10:31:01,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 10:31:01,253 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 10:31:01,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 10:31:01,254 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:01,254 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-09-30 10:31:01,254 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:01,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:01,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-09-30 10:31:01,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:01,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:01,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:01,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:01,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:01,599 WARN L178 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:31:01,776 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 10:31:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:02,493 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:02,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:02,501 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:31:02,524 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 10:31:02,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:02,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:03,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:03,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-09-30 10:31:03,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 10:31:03,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 10:31:03,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=3165, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:31:03,630 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 58 states. [2018-09-30 10:31:04,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:04,367 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 10:31:04,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 10:31:04,368 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 29 [2018-09-30 10:31:04,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:04,368 INFO L225 Difference]: With dead ends: 32 [2018-09-30 10:31:04,368 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:31:04,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=141, Invalid=3165, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:31:04,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:31:04,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 10:31:04,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 10:31:04,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 10:31:04,374 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-30 10:31:04,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:04,374 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 10:31:04,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 10:31:04,374 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 10:31:04,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 10:31:04,375 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:04,375 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-09-30 10:31:04,375 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:04,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:04,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-09-30 10:31:04,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:04,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:04,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:04,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:04,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:05,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:05,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:05,144 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:31:05,159 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:31:05,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:05,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:06,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:06,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-30 10:31:06,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 10:31:06,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 10:31:06,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3394, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:31:06,607 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 60 states. [2018-09-30 10:31:07,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:07,390 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 10:31:07,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:31:07,391 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 30 [2018-09-30 10:31:07,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:07,391 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:31:07,392 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 10:31:07,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=146, Invalid=3394, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:31:07,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 10:31:07,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 10:31:07,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:31:07,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 10:31:07,397 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-30 10:31:07,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:07,398 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 10:31:07,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 10:31:07,398 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 10:31:07,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 10:31:07,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:07,398 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-09-30 10:31:07,399 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:07,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:07,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-09-30 10:31:07,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:07,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:07,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:07,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:07,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:07,569 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:31:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:08,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:08,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:08,410 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:31:08,431 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 10:31:08,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:08,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:10,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:10,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-09-30 10:31:10,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 10:31:10,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 10:31:10,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3631, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:31:10,188 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 62 states. [2018-09-30 10:31:11,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:11,218 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 10:31:11,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:31:11,219 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 31 [2018-09-30 10:31:11,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:11,219 INFO L225 Difference]: With dead ends: 34 [2018-09-30 10:31:11,219 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:31:11,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=151, Invalid=3631, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:31:11,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:31:11,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 10:31:11,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 10:31:11,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 10:31:11,224 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-30 10:31:11,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:11,224 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 10:31:11,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 10:31:11,225 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 10:31:11,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 10:31:11,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:11,225 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-09-30 10:31:11,225 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:11,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:11,226 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-09-30 10:31:11,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:11,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:11,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:11,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:11,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:12,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:12,058 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:12,066 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:31:12,090 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 10:31:12,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:12,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:13,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:13,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-09-30 10:31:13,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 10:31:13,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 10:31:13,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=3876, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 10:31:13,435 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 64 states. [2018-09-30 10:31:14,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:14,589 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 10:31:14,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 10:31:14,589 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 32 [2018-09-30 10:31:14,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:14,590 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:31:14,590 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 10:31:14,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=156, Invalid=3876, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 10:31:14,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 10:31:14,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 10:31:14,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:31:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 10:31:14,595 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-30 10:31:14,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:14,596 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 10:31:14,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 10:31:14,596 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 10:31:14,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:31:14,596 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:14,596 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-09-30 10:31:14,597 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:14,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:14,597 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-09-30 10:31:14,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:14,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:14,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:14,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:14,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:15,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:15,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:15,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:15,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:17,223 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:17,223 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-30 10:31:17,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 10:31:17,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 10:31:17,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=4129, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:31:17,225 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 66 states. [2018-09-30 10:31:18,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:18,654 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 10:31:18,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:31:18,654 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 33 [2018-09-30 10:31:18,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:18,655 INFO L225 Difference]: With dead ends: 36 [2018-09-30 10:31:18,655 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:31:18,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=161, Invalid=4129, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:31:18,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:31:18,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 10:31:18,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 10:31:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 10:31:18,660 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-30 10:31:18,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:18,661 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 10:31:18,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 10:31:18,661 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 10:31:18,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 10:31:18,661 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:18,661 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-09-30 10:31:18,662 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:18,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:18,662 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-09-30 10:31:18,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:18,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:18,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:18,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:18,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:19,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:19,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:19,586 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:31:19,619 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:31:19,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:19,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:21,069 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:21,091 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:21,091 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-09-30 10:31:21,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 10:31:21,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 10:31:21,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=4390, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:31:21,092 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 68 states. [2018-09-30 10:31:22,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:22,389 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 10:31:22,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:31:22,390 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 34 [2018-09-30 10:31:22,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:22,390 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:31:22,391 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 10:31:22,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=166, Invalid=4390, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:31:22,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 10:31:22,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 10:31:22,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 10:31:22,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 10:31:22,396 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-30 10:31:22,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:22,396 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 10:31:22,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 10:31:22,396 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 10:31:22,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 10:31:22,397 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:22,397 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-09-30 10:31:22,397 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:22,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:22,397 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-09-30 10:31:22,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:22,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:22,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:22,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:22,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:23,295 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:23,295 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:23,302 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:31:23,344 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 10:31:23,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:23,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:24,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:24,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-09-30 10:31:24,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 10:31:24,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 10:31:24,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=4659, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:31:24,828 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 70 states. [2018-09-30 10:31:26,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:26,211 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 10:31:26,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 10:31:26,211 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 35 [2018-09-30 10:31:26,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:26,212 INFO L225 Difference]: With dead ends: 38 [2018-09-30 10:31:26,212 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:31:26,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=171, Invalid=4659, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:31:26,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:31:26,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 10:31:26,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 10:31:26,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 10:31:26,218 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-30 10:31:26,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:26,218 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 10:31:26,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 10:31:26,218 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 10:31:26,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 10:31:26,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:26,219 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-09-30 10:31:26,219 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:26,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:26,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-09-30 10:31:26,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:26,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:26,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:26,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:26,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:26,567 WARN L178 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:31:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:27,558 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:27,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:27,566 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:31:27,587 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:31:27,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:27,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:29,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:29,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-30 10:31:29,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 10:31:29,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 10:31:29,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=4936, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:31:29,161 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 72 states. [2018-09-30 10:31:30,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:30,712 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 10:31:30,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 10:31:30,713 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 36 [2018-09-30 10:31:30,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:30,714 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:31:30,714 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 10:31:30,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=176, Invalid=4936, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:31:30,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 10:31:30,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 10:31:30,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 10:31:30,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 10:31:30,718 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-30 10:31:30,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:30,718 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 10:31:30,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 10:31:30,719 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 10:31:30,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 10:31:30,719 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:30,719 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-09-30 10:31:30,719 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:30,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:30,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-09-30 10:31:30,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:30,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:30,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:30,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:30,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:31,028 WARN L178 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:31:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:32,110 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:32,110 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:32,118 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:31:32,152 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 10:31:32,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:32,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:33,847 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:33,847 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-09-30 10:31:33,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 10:31:33,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 10:31:33,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=5221, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 10:31:33,848 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 74 states. [2018-09-30 10:31:35,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:35,391 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-30 10:31:35,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 10:31:35,391 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 37 [2018-09-30 10:31:35,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:35,392 INFO L225 Difference]: With dead ends: 40 [2018-09-30 10:31:35,392 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:31:35,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=181, Invalid=5221, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 10:31:35,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:31:35,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 10:31:35,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 10:31:35,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 10:31:35,397 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-30 10:31:35,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:35,397 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 10:31:35,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 10:31:35,397 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 10:31:35,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 10:31:35,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:35,398 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-09-30 10:31:35,398 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:35,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:35,398 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-09-30 10:31:35,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:35,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:35,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:35,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:35,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:36,528 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:36,528 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:36,528 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:36,536 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:31:36,569 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 10:31:36,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:36,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:38,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:38,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-09-30 10:31:38,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 10:31:38,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 10:31:38,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=5514, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 10:31:38,556 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 76 states. [2018-09-30 10:31:39,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:39,848 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 10:31:39,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:31:39,848 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 38 [2018-09-30 10:31:39,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:39,849 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:31:39,849 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 10:31:39,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=186, Invalid=5514, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 10:31:39,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 10:31:39,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 10:31:39,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 10:31:39,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 10:31:39,853 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-30 10:31:39,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:39,853 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 10:31:39,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 10:31:39,853 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 10:31:39,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 10:31:39,854 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:39,854 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-09-30 10:31:39,854 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:39,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:39,855 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-09-30 10:31:39,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:39,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:39,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:39,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:39,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:40,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:40,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:40,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:41,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:41,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:43,103 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:43,103 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-30 10:31:43,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 10:31:43,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 10:31:43,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=5815, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 10:31:43,104 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 78 states. [2018-09-30 10:31:45,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:45,201 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-30 10:31:45,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 10:31:45,202 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 39 [2018-09-30 10:31:45,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:45,203 INFO L225 Difference]: With dead ends: 42 [2018-09-30 10:31:45,203 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:31:45,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=191, Invalid=5815, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 10:31:45,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:31:45,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 10:31:45,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 10:31:45,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 10:31:45,207 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-30 10:31:45,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:45,207 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 10:31:45,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 10:31:45,207 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 10:31:45,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 10:31:45,208 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:45,208 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-09-30 10:31:45,208 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:45,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:45,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-09-30 10:31:45,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:45,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:45,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:45,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:45,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:45,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:46,566 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:46,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:46,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:31:46,597 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:31:46,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:46,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:48,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:48,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-09-30 10:31:48,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 10:31:48,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 10:31:48,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=6124, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 10:31:48,762 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 80 states. [2018-09-30 10:31:50,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:50,523 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 10:31:50,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:31:50,524 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 40 [2018-09-30 10:31:50,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:50,525 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:31:50,525 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 10:31:50,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=196, Invalid=6124, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 10:31:50,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 10:31:50,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 10:31:50,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 10:31:50,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 10:31:50,529 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-30 10:31:50,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:50,529 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 10:31:50,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 10:31:50,529 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 10:31:50,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 10:31:50,529 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:50,529 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-09-30 10:31:50,530 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:50,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:50,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-09-30 10:31:50,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:50,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:50,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:50,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:50,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:50,881 WARN L178 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:31:51,066 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 10:31:51,271 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 10:31:51,484 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-30 10:31:51,721 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 10:31:51,978 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 10:31:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:53,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:53,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:53,220 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:31:53,253 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 10:31:53,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:53,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:55,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:55,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-09-30 10:31:55,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 10:31:55,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 10:31:55,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=6441, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 10:31:55,320 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 82 states. [2018-09-30 10:31:57,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:57,044 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-30 10:31:57,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 10:31:57,044 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 41 [2018-09-30 10:31:57,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:57,045 INFO L225 Difference]: With dead ends: 44 [2018-09-30 10:31:57,045 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:31:57,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=201, Invalid=6441, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 10:31:57,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:31:57,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 10:31:57,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 10:31:57,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 10:31:57,050 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-30 10:31:57,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:57,050 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 10:31:57,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 10:31:57,051 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 10:31:57,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 10:31:57,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:57,051 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-09-30 10:31:57,051 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:57,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:57,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-09-30 10:31:57,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:57,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:57,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:57,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:57,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:57,425 WARN L178 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:31:57,607 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 10:31:57,813 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 10:31:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:58,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:58,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:58,960 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:31:58,984 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:31:58,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:58,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:01,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:01,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-30 10:32:01,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 10:32:01,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 10:32:01,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=6766, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 10:32:01,235 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 84 states. [2018-09-30 10:32:03,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:03,002 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 10:32:03,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:32:03,003 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 42 [2018-09-30 10:32:03,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:03,004 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:32:03,004 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 10:32:03,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=206, Invalid=6766, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 10:32:03,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 10:32:03,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 10:32:03,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 10:32:03,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 10:32:03,007 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-30 10:32:03,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:03,007 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 10:32:03,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 10:32:03,007 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 10:32:03,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 10:32:03,008 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:03,008 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-09-30 10:32:03,008 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:03,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:03,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-09-30 10:32:03,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:03,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:03,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:03,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:03,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:03,201 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:32:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:04,384 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:04,384 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:04,391 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:32:04,498 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 10:32:04,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:04,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:06,785 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:06,805 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:06,805 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-09-30 10:32:06,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 10:32:06,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 10:32:06,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=7099, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 10:32:06,806 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 86 states. [2018-09-30 10:32:08,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:08,571 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-30 10:32:08,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 10:32:08,572 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 43 [2018-09-30 10:32:08,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:08,572 INFO L225 Difference]: With dead ends: 46 [2018-09-30 10:32:08,572 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:32:08,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=211, Invalid=7099, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 10:32:08,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:32:08,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 10:32:08,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 10:32:08,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 10:32:08,577 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-30 10:32:08,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:08,577 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 10:32:08,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 10:32:08,577 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 10:32:08,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 10:32:08,577 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:08,578 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-09-30 10:32:08,578 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:08,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:08,578 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-09-30 10:32:08,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:08,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:08,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:08,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:08,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:08,914 WARN L178 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:32:09,104 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 10:32:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:10,667 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:10,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:10,674 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:32:10,706 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 10:32:10,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:10,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:13,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:13,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-09-30 10:32:13,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 10:32:13,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 10:32:13,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=7440, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 10:32:13,332 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 88 states. [2018-09-30 10:32:15,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:15,144 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 10:32:15,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 10:32:15,144 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 44 [2018-09-30 10:32:15,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:15,145 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:32:15,145 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 10:32:15,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=216, Invalid=7440, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 10:32:15,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 10:32:15,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 10:32:15,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 10:32:15,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 10:32:15,150 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-30 10:32:15,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:15,150 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 10:32:15,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 10:32:15,150 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 10:32:15,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 10:32:15,151 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:15,151 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-09-30 10:32:15,151 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:15,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:15,151 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-09-30 10:32:15,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:15,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:15,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:15,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:15,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:15,518 WARN L178 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:32:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:16,907 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:16,907 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:16,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:16,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:19,654 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:19,654 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-30 10:32:19,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 10:32:19,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 10:32:19,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=7789, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 10:32:19,655 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 90 states. [2018-09-30 10:32:21,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:21,667 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-30 10:32:21,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 10:32:21,668 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 45 [2018-09-30 10:32:21,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:21,669 INFO L225 Difference]: With dead ends: 48 [2018-09-30 10:32:21,669 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:32:21,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=221, Invalid=7789, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 10:32:21,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:32:21,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 10:32:21,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 10:32:21,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 10:32:21,673 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-30 10:32:21,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:21,673 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 10:32:21,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 10:32:21,673 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 10:32:21,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 10:32:21,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:21,674 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-09-30 10:32:21,674 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:21,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:21,674 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-09-30 10:32:21,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:21,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:21,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:21,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:21,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:21,882 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:32:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:23,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:23,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:23,457 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:32:23,483 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:32:23,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:23,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:26,052 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:26,052 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-09-30 10:32:26,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 10:32:26,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 10:32:26,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=8146, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 10:32:26,053 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 92 states. [2018-09-30 10:32:28,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:28,706 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 10:32:28,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:32:28,707 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 46 [2018-09-30 10:32:28,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:28,707 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:32:28,707 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 10:32:28,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=226, Invalid=8146, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 10:32:28,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 10:32:28,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 10:32:28,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 10:32:28,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 10:32:28,711 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-30 10:32:28,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:28,711 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 10:32:28,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 10:32:28,711 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 10:32:28,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 10:32:28,712 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:28,712 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-09-30 10:32:28,712 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:28,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:28,713 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-09-30 10:32:28,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:28,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:28,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:28,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:28,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:29,070 WARN L178 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:32:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:30,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:30,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:30,618 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:32:30,657 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 10:32:30,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:30,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:33,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:33,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:33,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-09-30 10:32:33,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 10:32:33,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 10:32:33,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=8511, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 10:32:33,576 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 94 states. [2018-09-30 10:32:36,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:36,350 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-30 10:32:36,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 10:32:36,351 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 47 [2018-09-30 10:32:36,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:36,352 INFO L225 Difference]: With dead ends: 50 [2018-09-30 10:32:36,352 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:32:36,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=231, Invalid=8511, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 10:32:36,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:32:36,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 10:32:36,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 10:32:36,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 10:32:36,355 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-30 10:32:36,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:36,355 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 10:32:36,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 10:32:36,355 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 10:32:36,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 10:32:36,356 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:36,356 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-09-30 10:32:36,356 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:36,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:36,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-09-30 10:32:36,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:36,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:36,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:36,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:36,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:36,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:36,603 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:32:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:38,239 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:38,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:38,246 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:32:38,275 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:32:38,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:38,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:41,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:41,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-09-30 10:32:41,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 10:32:41,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 10:32:41,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=8884, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 10:32:41,064 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 96 states. [2018-09-30 10:32:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:42,968 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 10:32:42,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:32:42,969 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 48 [2018-09-30 10:32:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:42,970 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:32:42,970 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 10:32:42,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=236, Invalid=8884, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 10:32:42,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 10:32:42,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 10:32:42,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 10:32:42,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 10:32:42,974 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-30 10:32:42,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:42,975 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 10:32:42,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 10:32:42,975 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 10:32:42,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 10:32:42,975 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:42,975 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-09-30 10:32:42,976 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:42,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:42,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-09-30 10:32:42,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:42,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:42,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:42,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:42,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:42,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:43,321 WARN L178 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:32:44,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:44,836 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:44,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:44,843 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:32:44,880 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 10:32:44,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:44,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:47,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:47,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-30 10:32:47,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 10:32:47,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 10:32:47,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=9265, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 10:32:47,779 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 98 states. [2018-09-30 10:32:50,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:50,723 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-30 10:32:50,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 10:32:50,724 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 49 [2018-09-30 10:32:50,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:50,724 INFO L225 Difference]: With dead ends: 52 [2018-09-30 10:32:50,725 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:32:50,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=241, Invalid=9265, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 10:32:50,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:32:50,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 10:32:50,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 10:32:50,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 10:32:50,728 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-30 10:32:50,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:50,729 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 10:32:50,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 10:32:50,729 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 10:32:50,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 10:32:50,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:50,729 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-09-30 10:32:50,729 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:50,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:50,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-09-30 10:32:50,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:50,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:50,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:50,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:50,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:50,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:52,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:52,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:52,394 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:52,401 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:32:52,441 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 10:32:52,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:52,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:55,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:55,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:55,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-09-30 10:32:55,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 10:32:55,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 10:32:55,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=9654, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 10:32:55,693 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 100 states. [2018-09-30 10:32:58,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:58,455 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 10:32:58,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:32:58,455 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 50 [2018-09-30 10:32:58,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:58,456 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:32:58,456 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 10:32:58,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=246, Invalid=9654, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 10:32:58,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 10:32:58,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 10:32:58,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 10:32:58,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 10:32:58,461 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-30 10:32:58,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:58,461 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 10:32:58,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 10:32:58,462 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 10:32:58,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 10:32:58,462 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:58,462 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-09-30 10:32:58,462 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:58,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:58,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-09-30 10:32:58,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:58,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:58,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:58,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:58,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:00,353 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:00,353 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:00,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:00,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:03,641 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:03,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-30 10:33:03,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 10:33:03,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 10:33:03,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=10051, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 10:33:03,643 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 102 states. [2018-09-30 10:33:06,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:06,068 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-30 10:33:06,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 10:33:06,069 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 51 [2018-09-30 10:33:06,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:06,069 INFO L225 Difference]: With dead ends: 54 [2018-09-30 10:33:06,070 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:33:06,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=251, Invalid=10051, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 10:33:06,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:33:06,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 10:33:06,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 10:33:06,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 10:33:06,074 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-30 10:33:06,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:06,074 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 10:33:06,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 10:33:06,074 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 10:33:06,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 10:33:06,074 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:06,075 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-09-30 10:33:06,075 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:06,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:06,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-09-30 10:33:06,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:06,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:06,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:06,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:06,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:06,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:06,350 WARN L178 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:33:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:08,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:08,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:08,048 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:08,089 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:08,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:08,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:11,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:11,978 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:11,978 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-09-30 10:33:11,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 10:33:11,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 10:33:11,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=10456, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 10:33:11,980 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 104 states. [2018-09-30 10:33:14,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:14,082 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 10:33:14,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:33:14,082 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 52 [2018-09-30 10:33:14,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:14,083 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:33:14,084 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 10:33:14,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=256, Invalid=10456, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 10:33:14,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 10:33:14,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 10:33:14,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 10:33:14,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 10:33:14,088 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-30 10:33:14,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:14,088 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 10:33:14,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 10:33:14,089 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 10:33:14,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 10:33:14,089 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:14,089 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-09-30 10:33:14,089 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:14,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:14,090 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-09-30 10:33:14,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:14,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:14,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:14,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:14,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:14,288 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:33:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:16,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:16,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:16,092 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:16,157 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 10:33:16,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:16,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:19,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:19,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-09-30 10:33:19,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 10:33:19,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 10:33:19,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=10869, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 10:33:19,909 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 106 states. [2018-09-30 10:33:23,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:23,456 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-30 10:33:23,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 10:33:23,456 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 53 [2018-09-30 10:33:23,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:23,457 INFO L225 Difference]: With dead ends: 56 [2018-09-30 10:33:23,457 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:33:23,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=261, Invalid=10869, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 10:33:23,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:33:23,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 10:33:23,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 10:33:23,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 10:33:23,461 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-30 10:33:23,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:23,461 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 10:33:23,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 10:33:23,461 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 10:33:23,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 10:33:23,462 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:23,462 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-09-30 10:33:23,462 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:23,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:23,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-09-30 10:33:23,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:23,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:23,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:23,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:23,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:25,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:25,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:25,590 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:25,624 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:25,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:25,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:29,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:29,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-30 10:33:29,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 10:33:29,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 10:33:29,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=11290, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 10:33:29,318 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 108 states. [2018-09-30 10:33:33,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:33,365 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 10:33:33,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:33:33,366 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 54 [2018-09-30 10:33:33,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:33,367 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:33:33,367 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 10:33:33,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=266, Invalid=11290, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 10:33:33,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 10:33:33,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 10:33:33,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 10:33:33,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 10:33:33,371 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-30 10:33:33,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:33,371 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 10:33:33,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 10:33:33,372 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 10:33:33,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 10:33:33,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:33,372 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-09-30 10:33:33,372 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:33,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:33,372 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-09-30 10:33:33,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:33,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:33,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:33,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:33,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:33,540 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2018-09-30 10:33:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:35,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:35,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:35,661 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:35,710 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 10:33:35,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:35,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:39,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:39,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-09-30 10:33:39,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 10:33:39,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 10:33:39,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=11719, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 10:33:39,333 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 110 states. [2018-09-30 10:33:43,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:43,381 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-30 10:33:43,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 10:33:43,382 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 55 [2018-09-30 10:33:43,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:43,383 INFO L225 Difference]: With dead ends: 58 [2018-09-30 10:33:43,383 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:33:43,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=271, Invalid=11719, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 10:33:43,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:33:43,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 10:33:43,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 10:33:43,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 10:33:43,387 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-30 10:33:43,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:43,388 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 10:33:43,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 10:33:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 10:33:43,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 10:33:43,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:43,389 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-09-30 10:33:43,389 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:43,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:43,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-09-30 10:33:43,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:43,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:43,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:43,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:43,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:43,598 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:33:45,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:45,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:45,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:45,713 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:45,760 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-30 10:33:45,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:45,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:49,862 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:49,862 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-09-30 10:33:49,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 10:33:49,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 10:33:49,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=12156, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 10:33:49,863 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 112 states. [2018-09-30 10:33:53,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:53,846 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 10:33:53,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:33:53,846 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 56 [2018-09-30 10:33:53,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:53,847 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:33:53,847 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 10:33:53,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=276, Invalid=12156, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 10:33:53,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 10:33:53,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 10:33:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 10:33:53,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 10:33:53,851 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-30 10:33:53,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:53,852 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 10:33:53,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 10:33:53,852 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 10:33:53,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 10:33:53,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:53,852 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-09-30 10:33:53,852 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:53,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:53,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-09-30 10:33:53,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:53,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:53,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:53,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:53,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:54,022 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:33:56,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:56,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:56,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:56,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:56,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:00,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:00,539 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:00,539 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-30 10:34:00,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 10:34:00,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 10:34:00,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=12601, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 10:34:00,540 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 114 states. [2018-09-30 10:34:04,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:04,579 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-30 10:34:04,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 10:34:04,579 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 57 [2018-09-30 10:34:04,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:04,580 INFO L225 Difference]: With dead ends: 60 [2018-09-30 10:34:04,580 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:34:04,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=281, Invalid=12601, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 10:34:04,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:34:04,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 10:34:04,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 10:34:04,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 10:34:04,585 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-30 10:34:04,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:04,585 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 10:34:04,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 10:34:04,585 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 10:34:04,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 10:34:04,585 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:04,585 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-09-30 10:34:04,585 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:04,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:04,586 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-09-30 10:34:04,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:04,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:04,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:04,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:04,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:04,927 WARN L178 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:34:05,108 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 10:34:05,307 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 10:34:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:07,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:07,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:07,492 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:07,524 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:07,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:07,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:11,923 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:11,923 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-09-30 10:34:11,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 10:34:11,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 10:34:11,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=13054, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 10:34:11,924 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 116 states. [2018-09-30 10:34:16,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:16,240 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 10:34:16,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:34:16,241 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 58 [2018-09-30 10:34:16,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:16,242 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:34:16,242 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 10:34:16,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=286, Invalid=13054, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 10:34:16,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 10:34:16,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 10:34:16,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 10:34:16,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 10:34:16,246 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-30 10:34:16,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:16,246 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 10:34:16,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 10:34:16,246 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 10:34:16,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 10:34:16,247 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:16,247 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-09-30 10:34:16,247 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:16,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:16,247 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-09-30 10:34:16,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:16,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:16,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:16,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:16,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:16,435 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 10:34:17,012 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 10:34:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:19,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:19,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:19,109 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:19,161 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 10:34:19,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:19,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:23,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:23,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-09-30 10:34:23,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 10:34:23,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 10:34:23,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=13515, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 10:34:23,695 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 118 states. [2018-09-30 10:34:28,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:28,243 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-30 10:34:28,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 10:34:28,244 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 59 [2018-09-30 10:34:28,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:28,245 INFO L225 Difference]: With dead ends: 62 [2018-09-30 10:34:28,245 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 10:34:28,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=291, Invalid=13515, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 10:34:28,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 10:34:28,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 10:34:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 10:34:28,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 10:34:28,251 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-30 10:34:28,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:28,251 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 10:34:28,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 10:34:28,252 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 10:34:28,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 10:34:28,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:28,252 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-09-30 10:34:28,252 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:28,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:28,253 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-09-30 10:34:28,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:28,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:28,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:28,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:28,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:28,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 10:34:29,998 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 10:34:30,003 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 10:34:30,003 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 10:34:30 BoogieIcfgContainer [2018-09-30 10:34:30,004 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 10:34:30,004 INFO L168 Benchmark]: Toolchain (without parser) took 248051.41 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -137.9 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 178.6 MB). Peak memory consumption was 40.8 MB. Max. memory is 7.1 GB. [2018-09-30 10:34:30,005 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:34:30,005 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.31 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:34:30,006 INFO L168 Benchmark]: Boogie Preprocessor took 20.12 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:34:30,006 INFO L168 Benchmark]: RCFGBuilder took 242.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:34:30,006 INFO L168 Benchmark]: TraceAbstraction took 247741.85 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -137.9 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 157.5 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2018-09-30 10:34:30,009 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.31 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.12 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 242.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 247741.85 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -137.9 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 157.5 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 18]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 18). Cancelled while BasicCegarLoop was analyzing trace of length 61 with TraceHistMax 58, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 51 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 247.6s OverallTime, 59 OverallIterations, 58 TraceHistogramMax, 81.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 117 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 106860 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 68.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3421 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3421 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32509 ImplicationChecksByTransitivity, 157.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=58, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 58 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 159.8s InterpolantComputationTime, 3536 NumberOfCodeBlocks, 3536 NumberOfCodeBlocksAsserted, 559 NumberOfCheckSat, 3421 ConstructedInterpolants, 0 QuantifiedInterpolants, 1724450 SizeOfPredicates, 0 NumberOfNonLiveVariables, 7011 ConjunctsInSsa, 6840 ConjunctsInUnsatCore, 115 InterpolantComputations, 1 PerfectInterpolantSequences, 0/65018 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/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_10-34-30-018.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_10-34-30-018.csv Completed graceful shutdown