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-bd42740 [2018-09-23 21:33:23,680 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 21:33:23,682 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 21:33:23,694 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 21:33:23,694 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 21:33:23,695 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 21:33:23,696 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 21:33:23,698 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 21:33:23,700 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 21:33:23,701 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 21:33:23,701 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-23 21:33:23,702 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-23 21:33:23,703 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-23 21:33:23,704 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-23 21:33:23,705 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-23 21:33:23,705 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-23 21:33:23,706 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-23 21:33:23,710 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-23 21:33:23,714 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-23 21:33:23,720 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-23 21:33:23,721 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-23 21:33:23,722 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-23 21:33:23,726 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-23 21:33:23,742 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 [2018-09-23 21:33:23,771 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 21:33:23,771 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 21:33:23,772 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 21:33:23,772 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 21:33:23,772 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 21:33:23,773 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 21:33:23,773 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 21:33:23,773 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 21:33:23,773 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 21:33:23,774 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 21:33:23,774 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 21:33:23,774 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 21:33:23,774 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 21:33:23,774 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 21:33:23,774 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 21:33:23,775 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 21:33:23,775 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 21:33:23,775 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 21:33:23,777 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 21:33:23,778 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 21:33:23,778 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 21:33:23,778 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 21:33:23,778 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:33:23,778 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 21:33:23,779 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 21:33:23,779 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 21:33:23,779 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 21:33:23,779 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 21:33:23,779 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 21:33:23,780 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 21:33:23,850 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 21:33:23,867 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 21:33:23,873 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 21:33:23,874 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 21:33:23,875 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 21:33:23,876 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-09-23 21:33:23,876 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl' [2018-09-23 21:33:23,923 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 21:33:23,927 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 21:33:23,927 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 21:33:23,928 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 21:33:23,928 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 21:33:23,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:33:23" (1/1) ... [2018-09-23 21:33:23,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:33:23" (1/1) ... [2018-09-23 21:33:23,965 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-23 21:33:23,965 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-23 21:33:23,966 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-23 21:33:23,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 21:33:23,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 21:33:23,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 21:33:23,969 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 21:33:23,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:33:23" (1/1) ... [2018-09-23 21:33:23,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:33:23" (1/1) ... [2018-09-23 21:33:23,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:33:23" (1/1) ... [2018-09-23 21:33:23,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:33:23" (1/1) ... [2018-09-23 21:33:23,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:33:23" (1/1) ... [2018-09-23 21:33:23,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:33:23" (1/1) ... [2018-09-23 21:33:23,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:33:23" (1/1) ... [2018-09-23 21:33:23,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 21:33:23,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 21:33:23,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 21:33:23,989 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 21:33:23,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:33:23" (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 [2018-09-23 21:33:24,062 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-23 21:33:24,062 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-23 21:33:24,062 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-23 21:33:24,241 INFO L351 CfgBuilder]: Using library mode [2018-09-23 21:33:24,242 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:33:24 BoogieIcfgContainer [2018-09-23 21:33:24,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 21:33:24,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 21:33:24,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 21:33:24,247 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 21:33:24,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:33:23" (1/2) ... [2018-09-23 21:33:24,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f801e30 and model type DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 09:33:24, skipping insertion in model container [2018-09-23 21:33:24,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:33:24" (2/2) ... [2018-09-23 21:33:24,250 INFO L112 eAbstractionObserver]: Analyzing ICFG DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-09-23 21:33:24,261 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 21:33:24,270 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 21:33:24,321 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 21:33:24,322 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 21:33:24,322 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 21:33:24,322 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 21:33:24,323 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 21:33:24,323 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 21:33:24,323 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 21:33:24,323 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 21:33:24,323 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 21:33:24,339 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-23 21:33:24,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-23 21:33:24,346 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:24,347 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-23 21:33:24,348 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:24,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:24,355 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-09-23 21:33:24,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:24,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:24,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:24,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:24,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:24,742 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-09-23 21:33:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:24,748 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:33:24,749 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-23 21:33:24,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 21:33:24,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 21:33:24,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:33:24,770 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-23 21:33:24,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:24,837 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-23 21:33:24,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 21:33:24,840 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-23 21:33:24,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:24,852 INFO L225 Difference]: With dead ends: 9 [2018-09-23 21:33:24,852 INFO L226 Difference]: Without dead ends: 4 [2018-09-23 21:33:24,856 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 [2018-09-23 21:33:24,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-09-23 21:33:24,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-09-23 21:33:24,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-09-23 21:33:24,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-09-23 21:33:24,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-09-23 21:33:24,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:24,891 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-09-23 21:33:24,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 21:33:24,892 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-09-23 21:33:24,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-23 21:33:24,892 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:24,892 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-23 21:33:24,892 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:24,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:24,893 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-09-23 21:33:24,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:24,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:24,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:24,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:24,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:25,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:25,081 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 [2018-09-23 21:33:25,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:25,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:25,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:25,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:25,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-09-23 21:33:25,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:33:25,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:33:25,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:33:25,186 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 6 states. [2018-09-23 21:33:25,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:25,341 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-09-23 21:33:25,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 21:33:25,342 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-09-23 21:33:25,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:25,343 INFO L225 Difference]: With dead ends: 6 [2018-09-23 21:33:25,343 INFO L226 Difference]: Without dead ends: 5 [2018-09-23 21:33:25,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:33:25,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-23 21:33:25,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-23 21:33:25,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-23 21:33:25,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-23 21:33:25,349 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-23 21:33:25,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:25,349 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-23 21:33:25,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:33:25,349 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-23 21:33:25,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 21:33:25,350 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:25,350 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-09-23 21:33:25,351 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:25,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:25,352 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-09-23 21:33:25,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:25,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:25,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:25,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:25,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:25,559 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-09-23 21:33:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:25,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:25,723 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 [2018-09-23 21:33:25,734 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:33:25,744 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:33:25,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:25,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:25,856 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:25,857 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-09-23 21:33:25,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:33:25,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:33:25,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:33:25,859 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 8 states. [2018-09-23 21:33:25,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:25,945 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-09-23 21:33:25,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:33:25,946 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-09-23 21:33:25,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:25,946 INFO L225 Difference]: With dead ends: 7 [2018-09-23 21:33:25,947 INFO L226 Difference]: Without dead ends: 6 [2018-09-23 21:33:25,948 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 [2018-09-23 21:33:25,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-23 21:33:25,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-23 21:33:25,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-23 21:33:25,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-23 21:33:25,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-23 21:33:25,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:25,956 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-23 21:33:25,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:33:25,956 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-23 21:33:25,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 21:33:25,957 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:25,957 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-09-23 21:33:25,959 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:25,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:25,959 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-09-23 21:33:25,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:25,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:25,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:25,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:25,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:26,187 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-09-23 21:33:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:26,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:26,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:33:26,288 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:33:26,295 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 21:33:26,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:26,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:26,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:26,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-23 21:33:26,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:33:26,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:33:26,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:33:26,435 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 10 states. [2018-09-23 21:33:26,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:26,600 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-23 21:33:26,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:33:26,601 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-09-23 21:33:26,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:26,601 INFO L225 Difference]: With dead ends: 8 [2018-09-23 21:33:26,602 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 21:33:26,602 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 [2018-09-23 21:33:26,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 21:33:26,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 21:33:26,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 21:33:26,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-23 21:33:26,606 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-23 21:33:26,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:26,606 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-23 21:33:26,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:33:26,606 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-23 21:33:26,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 21:33:26,607 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:26,607 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-09-23 21:33:26,607 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:26,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:26,608 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-09-23 21:33:26,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:26,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:26,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:26,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:26,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:26,870 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-09-23 21:33:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:26,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:26,989 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 [2018-09-23 21:33:26,997 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:33:27,004 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:33:27,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:27,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:27,140 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:27,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-23 21:33:27,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:33:27,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:33:27,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:33:27,142 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 12 states. [2018-09-23 21:33:27,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:27,209 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-23 21:33:27,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 21:33:27,209 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-09-23 21:33:27,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:27,210 INFO L225 Difference]: With dead ends: 9 [2018-09-23 21:33:27,210 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 21:33:27,210 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 [2018-09-23 21:33:27,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 21:33:27,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 21:33:27,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 21:33:27,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-23 21:33:27,214 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-23 21:33:27,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:27,214 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-23 21:33:27,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:33:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-23 21:33:27,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 21:33:27,215 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:27,215 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-09-23 21:33:27,215 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:27,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:27,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-09-23 21:33:27,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:27,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:27,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:27,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:27,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:27,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:27,397 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 [2018-09-23 21:33:27,406 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:33:27,418 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-23 21:33:27,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:27,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:27,634 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:27,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:27,655 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-23 21:33:27,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:33:27,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:33:27,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:33:27,656 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 14 states. [2018-09-23 21:33:27,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:27,860 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-23 21:33:27,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:33:27,861 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2018-09-23 21:33:27,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:27,862 INFO L225 Difference]: With dead ends: 10 [2018-09-23 21:33:27,862 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 21:33:27,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:33:27,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 21:33:27,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 21:33:27,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 21:33:27,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-23 21:33:27,867 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-23 21:33:27,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:27,867 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-23 21:33:27,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:33:27,867 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-23 21:33:27,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 21:33:27,868 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:27,868 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-09-23 21:33:27,868 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:27,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:27,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-09-23 21:33:27,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:27,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:27,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:27,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:27,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:27,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:28,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:28,065 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 [2018-09-23 21:33:28,074 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:33:28,081 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-23 21:33:28,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:28,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:28,418 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:28,418 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-09-23 21:33:28,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:33:28,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:33:28,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:33:28,419 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 16 states. [2018-09-23 21:33:28,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:28,527 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 21:33:28,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:33:28,528 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 8 [2018-09-23 21:33:28,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:28,528 INFO L225 Difference]: With dead ends: 11 [2018-09-23 21:33:28,529 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 21:33:28,529 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 [2018-09-23 21:33:28,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 21:33:28,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-23 21:33:28,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 21:33:28,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-23 21:33:28,533 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-23 21:33:28,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:28,534 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-23 21:33:28,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:33:28,534 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-23 21:33:28,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 21:33:28,534 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:28,535 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-09-23 21:33:28,535 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:28,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:28,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-09-23 21:33:28,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:28,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:28,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:28,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:28,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:28,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:28,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:33:28,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:28,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:29,017 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:29,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-23 21:33:29,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:33:29,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:33:29,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:33:29,018 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 18 states. [2018-09-23 21:33:29,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:29,157 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-23 21:33:29,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 21:33:29,157 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 9 [2018-09-23 21:33:29,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:29,158 INFO L225 Difference]: With dead ends: 12 [2018-09-23 21:33:29,159 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 21:33:29,159 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 [2018-09-23 21:33:29,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 21:33:29,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 21:33:29,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 21:33:29,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-23 21:33:29,163 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-23 21:33:29,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:29,164 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-23 21:33:29,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:33:29,164 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-23 21:33:29,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 21:33:29,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:29,165 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-09-23 21:33:29,165 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:29,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:29,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-09-23 21:33:29,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:29,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:29,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:29,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:29,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:29,379 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:29,379 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 [2018-09-23 21:33:29,399 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:33:29,417 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:33:29,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:29,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:29,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:29,665 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-09-23 21:33:29,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:33:29,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:33:29,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:33:29,667 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 20 states. [2018-09-23 21:33:29,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:29,808 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-23 21:33:29,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:33:29,809 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 10 [2018-09-23 21:33:29,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:29,810 INFO L225 Difference]: With dead ends: 13 [2018-09-23 21:33:29,810 INFO L226 Difference]: Without dead ends: 12 [2018-09-23 21:33:29,811 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 [2018-09-23 21:33:29,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-23 21:33:29,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-23 21:33:29,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 21:33:29,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-23 21:33:29,814 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-23 21:33:29,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:29,814 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-23 21:33:29,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:33:29,815 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-23 21:33:29,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 21:33:29,815 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:29,815 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-09-23 21:33:29,815 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:29,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:29,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-09-23 21:33:29,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:29,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:29,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:29,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:29,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:30,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:30,084 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 [2018-09-23 21:33:30,092 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:33:30,105 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 21:33:30,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:30,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:30,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:30,419 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-09-23 21:33:30,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:33:30,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:33:30,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:33:30,420 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 22 states. [2018-09-23 21:33:30,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:30,582 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-23 21:33:30,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 21:33:30,583 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 11 [2018-09-23 21:33:30,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:30,584 INFO L225 Difference]: With dead ends: 14 [2018-09-23 21:33:30,584 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 21:33:30,585 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 [2018-09-23 21:33:30,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 21:33:30,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 21:33:30,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 21:33:30,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-23 21:33:30,589 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-23 21:33:30,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:30,589 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-23 21:33:30,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:33:30,589 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-23 21:33:30,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 21:33:30,590 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:30,590 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-09-23 21:33:30,590 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:30,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:30,590 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-09-23 21:33:30,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:30,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:30,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:30,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:30,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:30,900 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:30,900 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 [2018-09-23 21:33:30,909 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:33:30,941 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:33:30,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:30,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:31,241 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:31,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-23 21:33:31,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 21:33:31,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 21:33:31,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:33:31,244 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 24 states. [2018-09-23 21:33:31,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:31,660 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-23 21:33:31,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:33:31,661 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 12 [2018-09-23 21:33:31,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:31,662 INFO L225 Difference]: With dead ends: 15 [2018-09-23 21:33:31,662 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 21:33:31,663 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 [2018-09-23 21:33:31,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 21:33:31,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-23 21:33:31,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 21:33:31,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-23 21:33:31,667 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-23 21:33:31,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:31,668 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-23 21:33:31,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 21:33:31,668 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-23 21:33:31,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 21:33:31,668 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:31,669 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-09-23 21:33:31,669 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:31,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:31,669 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-09-23 21:33:31,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:31,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:31,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:31,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:31,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:32,105 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:32,105 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 [2018-09-23 21:33:32,113 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:33:32,124 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 21:33:32,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:32,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:32,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:32,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-23 21:33:32,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 21:33:32,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 21:33:32,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:33:32,424 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 26 states. [2018-09-23 21:33:33,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:33,263 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-23 21:33:33,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 21:33:33,263 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 13 [2018-09-23 21:33:33,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:33,264 INFO L225 Difference]: With dead ends: 16 [2018-09-23 21:33:33,264 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 21:33:33,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:33:33,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 21:33:33,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 21:33:33,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 21:33:33,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-23 21:33:33,269 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-23 21:33:33,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:33,269 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-23 21:33:33,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 21:33:33,270 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-23 21:33:33,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 21:33:33,270 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:33,270 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-09-23 21:33:33,270 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:33,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:33,271 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-09-23 21:33:33,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:33,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:33,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:33,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:33,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:33,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:33,688 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 [2018-09-23 21:33:33,697 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:33:33,714 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 21:33:33,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:33,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:34,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:34,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-09-23 21:33:34,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 21:33:34,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 21:33:34,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:33:34,141 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 28 states. [2018-09-23 21:33:34,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:34,416 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-23 21:33:34,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 21:33:34,417 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 14 [2018-09-23 21:33:34,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:34,418 INFO L225 Difference]: With dead ends: 17 [2018-09-23 21:33:34,418 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 21:33:34,419 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 [2018-09-23 21:33:34,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 21:33:34,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-23 21:33:34,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 21:33:34,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-23 21:33:34,423 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-23 21:33:34,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:34,423 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-23 21:33:34,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 21:33:34,423 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-23 21:33:34,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 21:33:34,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:34,424 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-09-23 21:33:34,424 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:34,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:34,424 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-09-23 21:33:34,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:34,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:34,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:34,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:34,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:34,878 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-23 21:33:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:35,027 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:35,027 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 [2018-09-23 21:33:35,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:35,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:35,483 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:35,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-23 21:33:35,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 21:33:35,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 21:33:35,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:33:35,484 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 30 states. [2018-09-23 21:33:35,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:35,714 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-23 21:33:35,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 21:33:35,714 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 15 [2018-09-23 21:33:35,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:35,715 INFO L225 Difference]: With dead ends: 18 [2018-09-23 21:33:35,716 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 21:33:35,717 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 [2018-09-23 21:33:35,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 21:33:35,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 21:33:35,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 21:33:35,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-23 21:33:35,721 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-23 21:33:35,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:35,721 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-23 21:33:35,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 21:33:35,721 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-23 21:33:35,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 21:33:35,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:35,722 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-09-23 21:33:35,722 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:35,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:35,723 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-09-23 21:33:35,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:35,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:35,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:35,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:35,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:36,026 WARN L178 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:33:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:36,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:36,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:33:36,357 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:33:36,369 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:33:36,369 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:36,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:36,859 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:36,859 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-09-23 21:33:36,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 21:33:36,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 21:33:36,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:33:36,860 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 32 states. [2018-09-23 21:33:37,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:37,264 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-23 21:33:37,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:33:37,265 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 16 [2018-09-23 21:33:37,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:37,266 INFO L225 Difference]: With dead ends: 19 [2018-09-23 21:33:37,266 INFO L226 Difference]: Without dead ends: 18 [2018-09-23 21:33:37,267 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 [2018-09-23 21:33:37,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-23 21:33:37,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-23 21:33:37,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 21:33:37,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-23 21:33:37,272 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-23 21:33:37,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:37,272 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-23 21:33:37,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 21:33:37,272 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-23 21:33:37,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 21:33:37,273 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:37,273 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-09-23 21:33:37,273 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:37,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:37,274 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-09-23 21:33:37,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:37,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:37,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:37,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:37,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:37,500 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:33:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:37,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:37,762 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 [2018-09-23 21:33:37,772 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:33:37,787 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 21:33:37,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:37,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:38,295 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:38,296 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-09-23 21:33:38,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 21:33:38,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 21:33:38,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:33:38,297 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 34 states. [2018-09-23 21:33:38,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:38,774 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-23 21:33:38,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 21:33:38,775 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 17 [2018-09-23 21:33:38,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:38,776 INFO L225 Difference]: With dead ends: 20 [2018-09-23 21:33:38,776 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 21:33:38,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:33:38,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 21:33:38,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 21:33:38,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 21:33:38,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-23 21:33:38,782 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-23 21:33:38,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:38,782 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-23 21:33:38,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 21:33:38,783 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-23 21:33:38,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:33:38,784 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:38,784 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-09-23 21:33:38,784 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:38,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:38,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-09-23 21:33:38,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:38,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:38,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:38,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:38,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:38,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:39,009 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:33:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:39,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:39,275 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 [2018-09-23 21:33:39,284 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:33:39,315 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:33:39,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:39,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:39,802 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:39,803 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-23 21:33:39,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 21:33:39,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 21:33:39,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1174, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:33:39,804 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 36 states. [2018-09-23 21:33:40,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:40,088 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-23 21:33:40,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 21:33:40,089 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 18 [2018-09-23 21:33:40,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:40,090 INFO L225 Difference]: With dead ends: 21 [2018-09-23 21:33:40,090 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 21:33:40,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=86, Invalid=1174, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:33:40,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 21:33:40,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-23 21:33:40,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 21:33:40,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-23 21:33:40,096 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-23 21:33:40,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:40,096 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-23 21:33:40,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 21:33:40,097 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-23 21:33:40,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 21:33:40,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:40,097 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-09-23 21:33:40,097 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:40,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:40,098 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-09-23 21:33:40,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:40,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:40,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:40,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:40,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:40,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:40,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:33:40,495 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:33:40,510 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-23 21:33:40,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:40,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:41,002 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:41,003 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-09-23 21:33:41,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 21:33:41,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 21:33:41,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:33:41,004 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 38 states. [2018-09-23 21:33:41,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:41,551 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-23 21:33:41,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 21:33:41,552 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 19 [2018-09-23 21:33:41,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:41,553 INFO L225 Difference]: With dead ends: 22 [2018-09-23 21:33:41,553 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 21:33:41,554 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 [2018-09-23 21:33:41,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 21:33:41,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 21:33:41,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 21:33:41,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-23 21:33:41,560 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-23 21:33:41,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:41,560 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-23 21:33:41,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 21:33:41,560 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-23 21:33:41,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 21:33:41,561 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:41,561 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-09-23 21:33:41,561 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:41,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:41,562 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-09-23 21:33:41,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:41,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:41,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:41,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:41,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:42,149 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:42,149 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 [2018-09-23 21:33:42,159 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:33:42,180 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-23 21:33:42,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:42,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:42,914 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:42,915 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-09-23 21:33:42,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 21:33:42,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 21:33:42,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:33:42,916 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 40 states. [2018-09-23 21:33:43,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:43,734 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-23 21:33:43,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:33:43,735 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 20 [2018-09-23 21:33:43,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:43,735 INFO L225 Difference]: With dead ends: 23 [2018-09-23 21:33:43,736 INFO L226 Difference]: Without dead ends: 22 [2018-09-23 21:33:43,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:33:43,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-23 21:33:43,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-23 21:33:43,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 21:33:43,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-23 21:33:43,741 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-23 21:33:43,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:43,741 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-23 21:33:43,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 21:33:43,741 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-23 21:33:43,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 21:33:43,742 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:43,742 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-09-23 21:33:43,742 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:43,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:43,743 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-09-23 21:33:43,743 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:43,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:43,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:43,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:43,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:44,172 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:44,172 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 [2018-09-23 21:33:44,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:44,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:44,846 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:44,846 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-23 21:33:44,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 21:33:44,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 21:33:44,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1621, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:33:44,847 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 42 states. [2018-09-23 21:33:45,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:45,244 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-23 21:33:45,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 21:33:45,244 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 21 [2018-09-23 21:33:45,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:45,245 INFO L225 Difference]: With dead ends: 24 [2018-09-23 21:33:45,245 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 21:33:45,247 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=101, Invalid=1621, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:33:45,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 21:33:45,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 21:33:45,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 21:33:45,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-23 21:33:45,251 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-23 21:33:45,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:45,252 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-23 21:33:45,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 21:33:45,252 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-23 21:33:45,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 21:33:45,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:45,252 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-09-23 21:33:45,253 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:45,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:45,253 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-09-23 21:33:45,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:45,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:45,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:45,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:45,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:45,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:45,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:33:45,943 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:33:45,970 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:33:45,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:45,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:46,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:46,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-09-23 21:33:46,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 21:33:46,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 21:33:46,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:33:46,709 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 44 states. [2018-09-23 21:33:47,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:47,200 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-23 21:33:47,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:33:47,202 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 22 [2018-09-23 21:33:47,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:47,202 INFO L225 Difference]: With dead ends: 25 [2018-09-23 21:33:47,203 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 21:33:47,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:33:47,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 21:33:47,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-23 21:33:47,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 21:33:47,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-23 21:33:47,208 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-23 21:33:47,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:47,208 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-23 21:33:47,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 21:33:47,208 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-23 21:33:47,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 21:33:47,209 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:47,209 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-09-23 21:33:47,209 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:47,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:47,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-09-23 21:33:47,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:47,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:47,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:47,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:47,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:47,841 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:47,841 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 [2018-09-23 21:33:47,850 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:33:47,873 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 21:33:47,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:47,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:48,874 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:48,875 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-09-23 21:33:48,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 21:33:48,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 21:33:48,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1959, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:33:48,876 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 46 states. [2018-09-23 21:33:49,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:49,437 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-23 21:33:49,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:33:49,440 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 23 [2018-09-23 21:33:49,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:49,441 INFO L225 Difference]: With dead ends: 26 [2018-09-23 21:33:49,441 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 21:33:49,442 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 [2018-09-23 21:33:49,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 21:33:49,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 21:33:49,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 21:33:49,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-23 21:33:49,445 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-23 21:33:49,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:49,446 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-23 21:33:49,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 21:33:49,446 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-23 21:33:49,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 21:33:49,446 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:49,446 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-09-23 21:33:49,447 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:49,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:49,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-09-23 21:33:49,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:49,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:49,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:49,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:49,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:50,312 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:50,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:50,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:33:50,320 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:33:50,337 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:33:50,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:50,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:51,267 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:51,267 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-23 21:33:51,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 21:33:51,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 21:33:51,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2140, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:33:51,270 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 48 states. [2018-09-23 21:33:52,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:52,000 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-23 21:33:52,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:33:52,001 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 24 [2018-09-23 21:33:52,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:52,001 INFO L225 Difference]: With dead ends: 27 [2018-09-23 21:33:52,001 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 21:33:52,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=116, Invalid=2140, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:33:52,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 21:33:52,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-23 21:33:52,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 21:33:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-23 21:33:52,007 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-23 21:33:52,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:52,008 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-23 21:33:52,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 21:33:52,008 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-23 21:33:52,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 21:33:52,008 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:52,008 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-09-23 21:33:52,009 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:52,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:52,009 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-09-23 21:33:52,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:52,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:52,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:52,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:52,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:52,168 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:33:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:52,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:52,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:33:52,795 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:33:52,814 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-23 21:33:52,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:52,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:53,857 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:53,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-23 21:33:53,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 21:33:53,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 21:33:53,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2329, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:33:53,859 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 50 states. [2018-09-23 21:33:54,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:54,429 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-23 21:33:54,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 21:33:54,430 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 25 [2018-09-23 21:33:54,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:54,430 INFO L225 Difference]: With dead ends: 28 [2018-09-23 21:33:54,431 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 21:33:54,432 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 [2018-09-23 21:33:54,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 21:33:54,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 21:33:54,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 21:33:54,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-23 21:33:54,436 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-23 21:33:54,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:54,436 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-23 21:33:54,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 21:33:54,436 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-23 21:33:54,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 21:33:54,437 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:54,437 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-09-23 21:33:54,437 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:54,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:54,438 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-09-23 21:33:54,438 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:54,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:54,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:54,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:54,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:54,797 WARN L178 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:33:54,987 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-23 21:33:55,217 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-23 21:33:55,424 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-23 21:33:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:55,913 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:55,913 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:33:55,920 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:33:55,939 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 21:33:55,939 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:55,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:57,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:57,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-09-23 21:33:57,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 21:33:57,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 21:33:57,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2526, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:33:57,318 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 52 states. [2018-09-23 21:33:58,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:58,065 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-23 21:33:58,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 21:33:58,065 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 26 [2018-09-23 21:33:58,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:58,066 INFO L225 Difference]: With dead ends: 29 [2018-09-23 21:33:58,066 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 21:33:58,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=126, Invalid=2526, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:33:58,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 21:33:58,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-23 21:33:58,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 21:33:58,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-23 21:33:58,072 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-23 21:33:58,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:58,072 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-23 21:33:58,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 21:33:58,072 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-23 21:33:58,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-23 21:33:58,073 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:58,073 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-09-23 21:33:58,073 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:58,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:58,073 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-09-23 21:33:58,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:58,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:58,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:58,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:58,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:58,811 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:58,811 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 [2018-09-23 21:33:58,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:58,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:59,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:59,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-23 21:33:59,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 21:33:59,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 21:33:59,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2731, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:33:59,759 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 54 states. [2018-09-23 21:34:00,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:00,336 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-23 21:34:00,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 21:34:00,337 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 27 [2018-09-23 21:34:00,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:00,338 INFO L225 Difference]: With dead ends: 30 [2018-09-23 21:34:00,338 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 21:34:00,339 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 [2018-09-23 21:34:00,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 21:34:00,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 21:34:00,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 21:34:00,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-23 21:34:00,344 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-23 21:34:00,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:00,344 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-23 21:34:00,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 21:34:00,345 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-23 21:34:00,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 21:34:00,345 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:00,345 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-09-23 21:34:00,346 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:00,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:00,346 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-09-23 21:34:00,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:00,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:00,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:00,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:00,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:01,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:01,054 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 [2018-09-23 21:34:01,062 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:34:01,078 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:34:01,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:01,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:02,250 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:02,272 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:02,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-09-23 21:34:02,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 21:34:02,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 21:34:02,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2944, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:34:02,274 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 56 states. [2018-09-23 21:34:02,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:02,997 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-23 21:34:02,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:34:02,998 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 28 [2018-09-23 21:34:02,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:02,998 INFO L225 Difference]: With dead ends: 31 [2018-09-23 21:34:02,999 INFO L226 Difference]: Without dead ends: 30 [2018-09-23 21:34:03,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=136, Invalid=2944, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:34:03,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-23 21:34:03,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-23 21:34:03,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 21:34:03,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-23 21:34:03,003 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-23 21:34:03,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:03,003 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-23 21:34:03,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 21:34:03,004 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-23 21:34:03,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 21:34:03,004 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:03,004 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-09-23 21:34:03,005 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:03,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:03,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-09-23 21:34:03,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:03,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:03,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:03,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:03,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:03,282 WARN L178 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:34:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:03,868 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:03,868 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 [2018-09-23 21:34:03,883 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:34:03,905 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-23 21:34:03,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:03,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:04,997 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:04,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-09-23 21:34:04,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 21:34:04,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 21:34:04,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=3165, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:34:05,000 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 58 states. [2018-09-23 21:34:05,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:05,706 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-23 21:34:05,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 21:34:05,707 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 29 [2018-09-23 21:34:05,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:05,708 INFO L225 Difference]: With dead ends: 32 [2018-09-23 21:34:05,708 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 21:34:05,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=141, Invalid=3165, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:34:05,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 21:34:05,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 21:34:05,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 21:34:05,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-23 21:34:05,713 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-23 21:34:05,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:05,713 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-23 21:34:05,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 21:34:05,714 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-23 21:34:05,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 21:34:05,714 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:05,714 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-09-23 21:34:05,714 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:05,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:05,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-09-23 21:34:05,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:05,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:05,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:05,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:05,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:05,870 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:34:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:06,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:06,517 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:06,525 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:34:06,544 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:34:06,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:06,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:07,862 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:07,862 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-23 21:34:07,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 21:34:07,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 21:34:07,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3394, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:34:07,863 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 60 states. [2018-09-23 21:34:08,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:08,678 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-23 21:34:08,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 21:34:08,679 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 30 [2018-09-23 21:34:08,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:08,679 INFO L225 Difference]: With dead ends: 33 [2018-09-23 21:34:08,680 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 21:34:08,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=146, Invalid=3394, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:34:08,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 21:34:08,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-23 21:34:08,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 21:34:08,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-23 21:34:08,685 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-23 21:34:08,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:08,685 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-23 21:34:08,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 21:34:08,686 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-23 21:34:08,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-23 21:34:08,686 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:08,686 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-09-23 21:34:08,686 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:08,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:08,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-09-23 21:34:08,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:08,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:08,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:08,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:08,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:08,944 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-23 21:34:09,645 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:09,645 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:09,645 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 [2018-09-23 21:34:09,658 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:34:09,683 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-23 21:34:09,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:09,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:11,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:11,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-09-23 21:34:11,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 21:34:11,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 21:34:11,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3631, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:34:11,443 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 62 states. [2018-09-23 21:34:12,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:12,354 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-23 21:34:12,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:34:12,355 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 31 [2018-09-23 21:34:12,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:12,356 INFO L225 Difference]: With dead ends: 34 [2018-09-23 21:34:12,356 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 21:34:12,357 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 [2018-09-23 21:34:12,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 21:34:12,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 21:34:12,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 21:34:12,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-23 21:34:12,361 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-23 21:34:12,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:12,361 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-23 21:34:12,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 21:34:12,361 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-23 21:34:12,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 21:34:12,362 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:12,362 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-09-23 21:34:12,362 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:12,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:12,363 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-09-23 21:34:12,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:12,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:12,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:12,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:12,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:12,710 WARN L178 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:34:12,918 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-23 21:34:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:13,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:13,632 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 [2018-09-23 21:34:13,640 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:34:13,666 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-23 21:34:13,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:13,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:14,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:14,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-09-23 21:34:14,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 21:34:14,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 21:34:14,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=3876, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:34:14,990 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 64 states. [2018-09-23 21:34:16,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:16,115 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-23 21:34:16,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 21:34:16,116 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 32 [2018-09-23 21:34:16,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:16,117 INFO L225 Difference]: With dead ends: 35 [2018-09-23 21:34:16,117 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 21:34:16,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=156, Invalid=3876, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:34:16,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 21:34:16,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-23 21:34:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 21:34:16,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-23 21:34:16,121 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-23 21:34:16,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:16,122 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-23 21:34:16,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 21:34:16,122 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-23 21:34:16,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 21:34:16,122 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:16,122 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-09-23 21:34:16,122 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:16,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:16,123 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-09-23 21:34:16,123 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:16,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:16,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:16,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:16,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:17,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:17,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:17,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:17,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:18,770 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:18,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:18,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-23 21:34:18,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 21:34:18,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 21:34:18,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=4129, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:34:18,791 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 66 states. [2018-09-23 21:34:20,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:20,147 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-23 21:34:20,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 21:34:20,148 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 33 [2018-09-23 21:34:20,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:20,148 INFO L225 Difference]: With dead ends: 36 [2018-09-23 21:34:20,148 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 21:34:20,150 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 [2018-09-23 21:34:20,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 21:34:20,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 21:34:20,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 21:34:20,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-23 21:34:20,155 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-23 21:34:20,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:20,155 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-23 21:34:20,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 21:34:20,155 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-23 21:34:20,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 21:34:20,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:20,156 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-09-23 21:34:20,156 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:20,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:20,156 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-09-23 21:34:20,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:20,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:20,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:20,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:20,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:21,071 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:21,071 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:21,078 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:34:21,097 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:34:21,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:21,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:22,564 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:22,584 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:22,585 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-09-23 21:34:22,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 21:34:22,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 21:34:22,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=4390, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:34:22,586 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 68 states. [2018-09-23 21:34:23,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:23,782 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-23 21:34:23,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 21:34:23,782 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 34 [2018-09-23 21:34:23,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:23,783 INFO L225 Difference]: With dead ends: 37 [2018-09-23 21:34:23,783 INFO L226 Difference]: Without dead ends: 36 [2018-09-23 21:34:23,784 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 [2018-09-23 21:34:23,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-23 21:34:23,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-23 21:34:23,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-23 21:34:23,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-23 21:34:23,789 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-23 21:34:23,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:23,789 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-23 21:34:23,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 21:34:23,789 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-23 21:34:23,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-23 21:34:23,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:23,790 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-09-23 21:34:23,790 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:23,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:23,791 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-09-23 21:34:23,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:23,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:23,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:23,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:23,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:24,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:24,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:24,782 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:34:24,822 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-23 21:34:24,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:24,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:26,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:26,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-09-23 21:34:26,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 21:34:26,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 21:34:26,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=4659, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:34:26,361 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 70 states. [2018-09-23 21:34:27,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:27,732 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-23 21:34:27,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 21:34:27,732 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 35 [2018-09-23 21:34:27,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:27,733 INFO L225 Difference]: With dead ends: 38 [2018-09-23 21:34:27,733 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 21:34:27,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=171, Invalid=4659, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:34:27,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 21:34:27,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 21:34:27,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 21:34:27,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-23 21:34:27,737 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-23 21:34:27,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:27,737 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-23 21:34:27,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 21:34:27,737 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-23 21:34:27,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 21:34:27,738 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:27,738 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-09-23 21:34:27,738 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:27,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:27,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-09-23 21:34:27,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:27,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:27,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:27,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:27,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:27,970 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:34:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:29,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:29,081 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 [2018-09-23 21:34:29,088 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:34:29,110 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:34:29,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:29,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:30,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:30,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-23 21:34:30,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 21:34:30,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 21:34:30,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=4936, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:34:30,703 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 72 states. [2018-09-23 21:34:32,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:32,179 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-23 21:34:32,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 21:34:32,180 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 36 [2018-09-23 21:34:32,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:32,180 INFO L225 Difference]: With dead ends: 39 [2018-09-23 21:34:32,180 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 21:34:32,181 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 [2018-09-23 21:34:32,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 21:34:32,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-23 21:34:32,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-23 21:34:32,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-23 21:34:32,185 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-23 21:34:32,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:32,185 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-23 21:34:32,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 21:34:32,185 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-23 21:34:32,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-23 21:34:32,185 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:32,185 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-09-23 21:34:32,185 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:32,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:32,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-09-23 21:34:32,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:32,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:32,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:32,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:32,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:32,417 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:34:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:33,617 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:33,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:33,623 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:34:33,654 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-23 21:34:33,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:33,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:35,316 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:35,336 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:35,336 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-09-23 21:34:35,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 21:34:35,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 21:34:35,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=5221, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:34:35,337 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 74 states. [2018-09-23 21:34:36,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:36,853 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-23 21:34:36,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 21:34:36,853 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 37 [2018-09-23 21:34:36,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:36,854 INFO L225 Difference]: With dead ends: 40 [2018-09-23 21:34:36,854 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 21:34:36,855 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 [2018-09-23 21:34:36,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 21:34:36,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 21:34:36,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 21:34:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-23 21:34:36,858 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-23 21:34:36,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:36,859 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-23 21:34:36,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 21:34:36,859 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-23 21:34:36,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 21:34:36,859 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:36,859 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-09-23 21:34:36,860 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:36,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:36,860 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-09-23 21:34:36,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:36,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:36,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:36,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:36,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:37,206 WARN L178 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:34:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:38,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:38,257 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:38,266 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:34:38,294 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 21:34:38,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:38,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:40,272 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:40,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-09-23 21:34:40,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 21:34:40,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 21:34:40,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=5514, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:34:40,274 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 76 states. [2018-09-23 21:34:41,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:41,476 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-23 21:34:41,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 21:34:41,477 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 38 [2018-09-23 21:34:41,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:41,477 INFO L225 Difference]: With dead ends: 41 [2018-09-23 21:34:41,478 INFO L226 Difference]: Without dead ends: 40 [2018-09-23 21:34:41,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=186, Invalid=5514, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:34:41,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-23 21:34:41,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-23 21:34:41,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 21:34:41,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-23 21:34:41,482 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-23 21:34:41,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:41,482 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-23 21:34:41,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 21:34:41,482 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-23 21:34:41,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-23 21:34:41,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:41,483 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-09-23 21:34:41,483 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:41,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:41,483 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-09-23 21:34:41,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:41,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:41,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:41,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:41,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:41,682 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:34:42,709 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:42,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:42,709 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 [2018-09-23 21:34:42,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:42,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:45,107 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:45,108 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-23 21:34:45,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 21:34:45,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 21:34:45,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=5815, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:34:45,109 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 78 states. [2018-09-23 21:34:47,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:47,166 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-23 21:34:47,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 21:34:47,166 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 39 [2018-09-23 21:34:47,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:47,167 INFO L225 Difference]: With dead ends: 42 [2018-09-23 21:34:47,167 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 21:34:47,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=191, Invalid=5815, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:34:47,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 21:34:47,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 21:34:47,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 21:34:47,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-23 21:34:47,171 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-23 21:34:47,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:47,171 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-23 21:34:47,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 21:34:47,171 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-23 21:34:47,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 21:34:47,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:47,172 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-09-23 21:34:47,172 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:47,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:47,172 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-09-23 21:34:47,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:47,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:47,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:47,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:47,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:47,523 WARN L178 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:34:47,707 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-23 21:34:49,005 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:49,005 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:49,005 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:49,012 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:34:49,036 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:34:49,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:49,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:50,965 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:50,965 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-09-23 21:34:50,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 21:34:50,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 21:34:50,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=6124, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:34:50,966 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 80 states. [2018-09-23 21:34:52,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:52,640 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-23 21:34:52,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 21:34:52,640 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 40 [2018-09-23 21:34:52,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:52,641 INFO L225 Difference]: With dead ends: 43 [2018-09-23 21:34:52,641 INFO L226 Difference]: Without dead ends: 42 [2018-09-23 21:34:52,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=196, Invalid=6124, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:34:52,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-23 21:34:52,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-23 21:34:52,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-23 21:34:52,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-23 21:34:52,645 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-23 21:34:52,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:52,645 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-23 21:34:52,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 21:34:52,645 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-23 21:34:52,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-23 21:34:52,645 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:52,645 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-09-23 21:34:52,646 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:52,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:52,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-09-23 21:34:52,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:52,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:52,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:52,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:52,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:54,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:54,152 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 [2018-09-23 21:34:54,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:34:54,193 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-23 21:34:54,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:54,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:56,298 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:56,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-09-23 21:34:56,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 21:34:56,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 21:34:56,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=6441, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:34:56,299 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 82 states. [2018-09-23 21:34:57,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:57,947 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-23 21:34:57,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 21:34:57,948 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 41 [2018-09-23 21:34:57,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:57,949 INFO L225 Difference]: With dead ends: 44 [2018-09-23 21:34:57,949 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 21:34:57,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=201, Invalid=6441, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:34:57,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 21:34:57,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 21:34:57,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 21:34:57,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-23 21:34:57,953 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-23 21:34:57,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:57,953 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-23 21:34:57,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 21:34:57,954 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-23 21:34:57,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 21:34:57,954 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:57,954 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-09-23 21:34:57,954 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:57,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:57,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-09-23 21:34:57,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:57,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:57,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:57,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:57,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:58,303 WARN L178 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:34:58,464 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-23 21:34:58,670 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-23 21:34:58,891 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-23 21:34:59,123 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-23 21:35:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:00,227 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:00,227 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 [2018-09-23 21:35:00,234 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:35:00,258 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:35:00,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:00,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:02,450 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:02,451 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-23 21:35:02,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 21:35:02,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 21:35:02,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=6766, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 21:35:02,452 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 84 states. [2018-09-23 21:35:04,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:04,063 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-23 21:35:04,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 21:35:04,063 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 42 [2018-09-23 21:35:04,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:04,064 INFO L225 Difference]: With dead ends: 45 [2018-09-23 21:35:04,064 INFO L226 Difference]: Without dead ends: 44 [2018-09-23 21:35:04,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=206, Invalid=6766, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 21:35:04,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-23 21:35:04,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-23 21:35:04,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 21:35:04,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-23 21:35:04,068 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-23 21:35:04,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:04,068 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-23 21:35:04,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 21:35:04,068 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-23 21:35:04,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-23 21:35:04,069 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:04,069 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-09-23 21:35:04,069 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:04,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:04,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-09-23 21:35:04,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:04,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:04,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:04,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:04,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:04,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:05,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:05,456 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 [2018-09-23 21:35:05,464 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:35:05,573 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-23 21:35:05,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:05,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:07,821 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:07,821 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-09-23 21:35:07,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 21:35:07,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 21:35:07,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=7099, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 21:35:07,822 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 86 states. [2018-09-23 21:35:09,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:09,580 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-23 21:35:09,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 21:35:09,580 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 43 [2018-09-23 21:35:09,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:09,581 INFO L225 Difference]: With dead ends: 46 [2018-09-23 21:35:09,581 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 21:35:09,582 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 [2018-09-23 21:35:09,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 21:35:09,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 21:35:09,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 21:35:09,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-23 21:35:09,586 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-23 21:35:09,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:09,586 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-23 21:35:09,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 21:35:09,586 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-23 21:35:09,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 21:35:09,586 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:09,586 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-09-23 21:35:09,587 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:09,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:09,587 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-09-23 21:35:09,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:09,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:09,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:09,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:09,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:09,928 WARN L178 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:35:10,114 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-23 21:35:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:11,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:11,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:35:11,550 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:35:11,586 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-23 21:35:11,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:11,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:14,014 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:14,014 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-09-23 21:35:14,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 21:35:14,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 21:35:14,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=7440, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 21:35:14,016 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 88 states. [2018-09-23 21:35:15,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:15,885 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-23 21:35:15,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 21:35:15,885 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 44 [2018-09-23 21:35:15,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:15,886 INFO L225 Difference]: With dead ends: 47 [2018-09-23 21:35:15,886 INFO L226 Difference]: Without dead ends: 46 [2018-09-23 21:35:15,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=216, Invalid=7440, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 21:35:15,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-23 21:35:15,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-23 21:35:15,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 21:35:15,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-23 21:35:15,890 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-23 21:35:15,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:15,891 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-23 21:35:15,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 21:35:15,891 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-23 21:35:15,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-23 21:35:15,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:15,891 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-09-23 21:35:15,891 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:15,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:15,892 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-09-23 21:35:15,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:15,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:15,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:15,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:15,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:17,337 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:17,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:17,338 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 [2018-09-23 21:35:17,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:17,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:20,100 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:20,101 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-23 21:35:20,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 21:35:20,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 21:35:20,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=7789, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 21:35:20,102 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 90 states. [2018-09-23 21:35:22,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:22,037 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-23 21:35:22,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 21:35:22,038 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 45 [2018-09-23 21:35:22,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:22,039 INFO L225 Difference]: With dead ends: 48 [2018-09-23 21:35:22,039 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 21:35:22,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=221, Invalid=7789, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 21:35:22,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 21:35:22,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 21:35:22,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 21:35:22,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-23 21:35:22,043 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-23 21:35:22,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:22,043 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-23 21:35:22,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 21:35:22,044 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-23 21:35:22,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 21:35:22,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:22,044 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-09-23 21:35:22,044 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:22,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:22,045 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-09-23 21:35:22,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:22,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:22,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:22,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:22,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:22,391 WARN L178 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:35:22,555 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-23 21:35:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:23,889 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:23,890 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 [2018-09-23 21:35:23,898 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:35:23,926 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:35:23,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:23,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:26,673 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:26,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-09-23 21:35:26,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-23 21:35:26,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-23 21:35:26,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=8146, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 21:35:26,675 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 92 states. [2018-09-23 21:35:29,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:29,158 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-23 21:35:29,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 21:35:29,159 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 46 [2018-09-23 21:35:29,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:29,159 INFO L225 Difference]: With dead ends: 49 [2018-09-23 21:35:29,160 INFO L226 Difference]: Without dead ends: 48 [2018-09-23 21:35:29,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=226, Invalid=8146, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 21:35:29,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-23 21:35:29,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-23 21:35:29,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-23 21:35:29,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-23 21:35:29,164 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-23 21:35:29,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:29,165 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-23 21:35:29,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-23 21:35:29,165 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-23 21:35:29,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-23 21:35:29,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:29,165 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-09-23 21:35:29,166 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:29,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:29,166 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-09-23 21:35:29,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:29,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:29,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:29,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:29,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:29,329 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:35:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:30,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:30,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:35:30,947 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:35:30,985 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-23 21:35:30,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:30,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:33,673 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:33,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-09-23 21:35:33,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-23 21:35:33,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-23 21:35:33,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=8511, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 21:35:33,675 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 94 states. [2018-09-23 21:35:36,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:36,496 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-23 21:35:36,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 21:35:36,497 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 47 [2018-09-23 21:35:36,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:36,498 INFO L225 Difference]: With dead ends: 50 [2018-09-23 21:35:36,498 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 21:35:36,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=231, Invalid=8511, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 21:35:36,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 21:35:36,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 21:35:36,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 21:35:36,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-23 21:35:36,503 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-23 21:35:36,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:36,503 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-23 21:35:36,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-23 21:35:36,503 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-23 21:35:36,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 21:35:36,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:36,504 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-09-23 21:35:36,504 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:36,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:36,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-09-23 21:35:36,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:36,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:36,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:36,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:36,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:38,059 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:38,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:35:38,068 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:35:38,099 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:35:38,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:38,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:41,174 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:41,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-09-23 21:35:41,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-23 21:35:41,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-23 21:35:41,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=8884, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 21:35:41,176 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 96 states. [2018-09-23 21:35:43,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:43,035 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-23 21:35:43,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 21:35:43,036 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 48 [2018-09-23 21:35:43,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:43,036 INFO L225 Difference]: With dead ends: 51 [2018-09-23 21:35:43,037 INFO L226 Difference]: Without dead ends: 50 [2018-09-23 21:35:43,037 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 [2018-09-23 21:35:43,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-23 21:35:43,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-23 21:35:43,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-23 21:35:43,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-23 21:35:43,042 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-23 21:35:43,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:43,042 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-23 21:35:43,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-23 21:35:43,042 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-23 21:35:43,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-23 21:35:43,042 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:43,043 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-09-23 21:35:43,043 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:43,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:43,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-09-23 21:35:43,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:43,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:43,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:43,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:43,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:43,304 WARN L178 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:35:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:44,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:44,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:35:44,815 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:35:44,859 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-23 21:35:44,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:44,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:47,971 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:47,971 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-23 21:35:47,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-23 21:35:47,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-23 21:35:47,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=9265, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 21:35:47,972 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 98 states. [2018-09-23 21:35:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:50,889 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-23 21:35:50,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 21:35:50,889 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 49 [2018-09-23 21:35:50,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:50,890 INFO L225 Difference]: With dead ends: 52 [2018-09-23 21:35:50,890 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 21:35:50,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=241, Invalid=9265, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 21:35:50,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 21:35:50,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 21:35:50,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 21:35:50,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-23 21:35:50,895 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-23 21:35:50,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:50,896 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-23 21:35:50,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-23 21:35:50,896 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-23 21:35:50,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 21:35:50,896 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:50,896 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-09-23 21:35:50,896 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:50,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:50,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-09-23 21:35:50,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:50,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:50,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:50,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:50,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:51,123 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:35:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:52,735 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:52,735 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:35:52,743 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:35:52,784 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 21:35:52,785 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:52,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:55,962 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:55,962 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-09-23 21:35:55,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-23 21:35:55,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-23 21:35:55,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=9654, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 21:35:55,963 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 100 states. [2018-09-23 21:35:58,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:58,645 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-23 21:35:58,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 21:35:58,646 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 50 [2018-09-23 21:35:58,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:58,647 INFO L225 Difference]: With dead ends: 53 [2018-09-23 21:35:58,647 INFO L226 Difference]: Without dead ends: 52 [2018-09-23 21:35:58,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=246, Invalid=9654, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 21:35:58,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-23 21:35:58,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-23 21:35:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-23 21:35:58,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-23 21:35:58,652 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-23 21:35:58,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:58,653 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-23 21:35:58,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-23 21:35:58,653 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-23 21:35:58,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-23 21:35:58,653 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:58,653 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-09-23 21:35:58,654 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:58,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:58,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-09-23 21:35:58,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:58,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:58,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:58,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:58,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:58,984 WARN L178 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:36:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:00,906 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:00,906 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:36:00,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:00,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:04,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:04,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-23 21:36:04,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-23 21:36:04,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-23 21:36:04,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=10051, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 21:36:04,117 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 102 states. [2018-09-23 21:36:06,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:06,526 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-23 21:36:06,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 21:36:06,526 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 51 [2018-09-23 21:36:06,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:06,527 INFO L225 Difference]: With dead ends: 54 [2018-09-23 21:36:06,527 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 21:36:06,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=251, Invalid=10051, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 21:36:06,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 21:36:06,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 21:36:06,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 21:36:06,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-23 21:36:06,531 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-23 21:36:06,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:06,531 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-23 21:36:06,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-23 21:36:06,532 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-23 21:36:06,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 21:36:06,532 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:06,532 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-09-23 21:36:06,532 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:06,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:06,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-09-23 21:36:06,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:06,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:06,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:06,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:06,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:06,796 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:36:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:08,503 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:08,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:36:08,512 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:36:08,551 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:36:08,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:08,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:12,278 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:12,278 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-09-23 21:36:12,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-23 21:36:12,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-23 21:36:12,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=10456, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 21:36:12,280 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 104 states. [2018-09-23 21:36:14,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:14,204 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-23 21:36:14,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 21:36:14,204 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 52 [2018-09-23 21:36:14,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:14,205 INFO L225 Difference]: With dead ends: 55 [2018-09-23 21:36:14,206 INFO L226 Difference]: Without dead ends: 54 [2018-09-23 21:36:14,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=256, Invalid=10456, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 21:36:14,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-23 21:36:14,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-23 21:36:14,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 21:36:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-23 21:36:14,210 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-23 21:36:14,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:14,210 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-23 21:36:14,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-23 21:36:14,210 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-23 21:36:14,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 21:36:14,210 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:14,211 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-09-23 21:36:14,211 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:14,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:14,211 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-09-23 21:36:14,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:14,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:14,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:14,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:14,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:14,417 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:36:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:16,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:16,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:36:16,405 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:36:16,472 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-23 21:36:16,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:16,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:19,996 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:19,996 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-09-23 21:36:19,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-23 21:36:19,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-23 21:36:19,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=10869, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 21:36:19,998 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 106 states. [2018-09-23 21:36:23,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:23,546 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-23 21:36:23,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 21:36:23,546 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 53 [2018-09-23 21:36:23,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:23,547 INFO L225 Difference]: With dead ends: 56 [2018-09-23 21:36:23,547 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 21:36:23,548 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 [2018-09-23 21:36:23,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 21:36:23,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 21:36:23,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 21:36:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-23 21:36:23,552 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-23 21:36:23,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:23,552 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-23 21:36:23,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-23 21:36:23,552 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-23 21:36:23,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 21:36:23,553 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:23,553 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-09-23 21:36:23,553 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:23,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:23,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-09-23 21:36:23,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:23,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:23,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:23,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:23,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:25,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:25,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:36:25,517 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:36:25,550 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:36:25,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:25,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:29,338 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:29,338 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-23 21:36:29,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-23 21:36:29,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-23 21:36:29,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=11290, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 21:36:29,339 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 108 states. [2018-09-23 21:36:33,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:33,404 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-23 21:36:33,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 21:36:33,405 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 54 [2018-09-23 21:36:33,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:33,405 INFO L225 Difference]: With dead ends: 57 [2018-09-23 21:36:33,406 INFO L226 Difference]: Without dead ends: 56 [2018-09-23 21:36:33,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=266, Invalid=11290, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 21:36:33,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-23 21:36:33,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-23 21:36:33,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-23 21:36:33,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-23 21:36:33,410 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-23 21:36:33,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:33,410 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-23 21:36:33,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-23 21:36:33,411 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-23 21:36:33,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-23 21:36:33,411 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:33,411 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-09-23 21:36:33,411 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:33,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:33,411 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-09-23 21:36:33,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:33,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:33,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:33,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:33,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:35,444 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:35,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:36:35,451 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:36:35,500 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-23 21:36:35,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:35,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:39,373 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:39,373 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-09-23 21:36:39,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-23 21:36:39,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-23 21:36:39,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=11719, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 21:36:39,375 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 110 states. [2018-09-23 21:36:43,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:43,329 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-23 21:36:43,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 21:36:43,330 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 55 [2018-09-23 21:36:43,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:43,331 INFO L225 Difference]: With dead ends: 58 [2018-09-23 21:36:43,331 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 21:36:43,332 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 [2018-09-23 21:36:43,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 21:36:43,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 21:36:43,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 21:36:43,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-23 21:36:43,336 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-23 21:36:43,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:43,337 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-23 21:36:43,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-23 21:36:43,337 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-23 21:36:43,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 21:36:43,337 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:43,337 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-09-23 21:36:43,338 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:43,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:43,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-09-23 21:36:43,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:43,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:43,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:43,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:43,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:43,508 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:36:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:45,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:45,455 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 [2018-09-23 21:36:45,462 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:36:45,507 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-23 21:36:45,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:45,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:49,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:49,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-09-23 21:36:49,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-23 21:36:49,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-23 21:36:49,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=12156, Unknown=0, NotChecked=0, Total=12432 [2018-09-23 21:36:49,663 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 112 states. [2018-09-23 21:36:53,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:53,566 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-23 21:36:53,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 21:36:53,567 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 56 [2018-09-23 21:36:53,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:53,568 INFO L225 Difference]: With dead ends: 59 [2018-09-23 21:36:53,568 INFO L226 Difference]: Without dead ends: 58 [2018-09-23 21:36:53,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=276, Invalid=12156, Unknown=0, NotChecked=0, Total=12432 [2018-09-23 21:36:53,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-23 21:36:53,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-23 21:36:53,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-23 21:36:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-23 21:36:53,573 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-23 21:36:53,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:53,573 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-23 21:36:53,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-23 21:36:53,573 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-23 21:36:53,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-23 21:36:53,574 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:53,574 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-09-23 21:36:53,574 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:53,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:53,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-09-23 21:36:53,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:53,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:53,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:53,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:53,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:53,762 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:36:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:55,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:55,803 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 [2018-09-23 21:36:55,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:55,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:00,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:00,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-23 21:37:00,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-23 21:37:00,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-23 21:37:00,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=12601, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 21:37:00,028 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 114 states. [2018-09-23 21:37:04,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:04,123 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-23 21:37:04,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 21:37:04,124 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 57 [2018-09-23 21:37:04,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:04,125 INFO L225 Difference]: With dead ends: 60 [2018-09-23 21:37:04,125 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 21:37:04,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=281, Invalid=12601, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 21:37:04,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 21:37:04,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 21:37:04,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 21:37:04,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-23 21:37:04,129 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-23 21:37:04,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:04,129 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-23 21:37:04,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-23 21:37:04,129 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-23 21:37:04,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 21:37:04,129 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:04,130 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-09-23 21:37:04,130 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:04,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:04,130 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-09-23 21:37:04,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:04,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:04,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:04,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:04,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:04,492 WARN L178 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 21:37:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:06,672 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:06,673 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:37:06,680 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:37:06,713 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:37:06,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:06,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:11,094 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:11,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-09-23 21:37:11,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-23 21:37:11,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-23 21:37:11,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=13054, Unknown=0, NotChecked=0, Total=13340 [2018-09-23 21:37:11,095 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 116 states. [2018-09-23 21:37:15,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:15,283 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-23 21:37:15,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 21:37:15,284 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 58 [2018-09-23 21:37:15,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:15,285 INFO L225 Difference]: With dead ends: 61 [2018-09-23 21:37:15,285 INFO L226 Difference]: Without dead ends: 60 [2018-09-23 21:37:15,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=286, Invalid=13054, Unknown=0, NotChecked=0, Total=13340 [2018-09-23 21:37:15,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-23 21:37:15,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-23 21:37:15,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-23 21:37:15,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-23 21:37:15,289 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-23 21:37:15,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:15,289 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-23 21:37:15,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-23 21:37:15,289 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-23 21:37:15,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-23 21:37:15,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:15,290 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-09-23 21:37:15,290 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:15,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:15,290 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-09-23 21:37:15,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:15,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:15,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:15,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:15,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:15,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:17,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:17,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:17,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:37:17,719 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:37:17,769 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-23 21:37:17,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:17,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:21,975 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:21,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-09-23 21:37:21,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-23 21:37:21,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-23 21:37:21,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=13515, Unknown=0, NotChecked=0, Total=13806 [2018-09-23 21:37:21,976 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 118 states. [2018-09-23 21:37:26,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:26,419 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-23 21:37:26,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 21:37:26,419 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 59 [2018-09-23 21:37:26,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:26,420 INFO L225 Difference]: With dead ends: 62 [2018-09-23 21:37:26,420 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 21:37:26,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=291, Invalid=13515, Unknown=0, NotChecked=0, Total=13806 [2018-09-23 21:37:26,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 21:37:26,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 21:37:26,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 21:37:26,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-23 21:37:26,426 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-23 21:37:26,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:26,426 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-23 21:37:26,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-23 21:37:26,426 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-23 21:37:26,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 21:37:26,426 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:26,426 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-09-23 21:37:26,427 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:26,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:26,427 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-09-23 21:37:26,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:26,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:26,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:26,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:26,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:27,736 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-23 21:37:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:29,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:29,454 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:29,464 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:37:29,498 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:37:29,499 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:29,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-23 21:37:32,022 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-23 21:37:32,223 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:32,223 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 21:37:32,229 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 21:37:32,229 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 09:37:32 BoogieIcfgContainer [2018-09-23 21:37:32,229 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 21:37:32,230 INFO L168 Benchmark]: Toolchain (without parser) took 248306.11 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -131.6 MB). Free memory was 1.4 GB in the beginning and 980.7 MB in the end (delta: 469.2 MB). Peak memory consumption was 337.6 MB. Max. memory is 7.1 GB. [2018-09-23 21:37:32,231 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:37:32,231 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.63 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:37:32,232 INFO L168 Benchmark]: Boogie Preprocessor took 19.89 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:37:32,232 INFO L168 Benchmark]: RCFGBuilder took 253.64 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 21:37:32,233 INFO L168 Benchmark]: TraceAbstraction took 247986.14 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -131.6 MB). Free memory was 1.4 GB in the beginning and 980.7 MB in the end (delta: 448.1 MB). Peak memory consumption was 316.5 MB. Max. memory is 7.1 GB. [2018-09-23 21:37:32,235 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.63 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.89 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 253.64 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 247986.14 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -131.6 MB). Free memory was 1.4 GB in the beginning and 980.7 MB in the end (delta: 448.1 MB). Peak memory consumption was 316.5 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 TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 92 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 247.9s OverallTime, 59 OverallIterations, 58 TraceHistogramMax, 80.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 117 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 106860 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 67.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3421 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3421 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32509 ImplicationChecksByTransitivity, 154.6s 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, 157.3s 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-0-2018-09-23_21-37-32-244.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-0-2018-09-23_21-37-32-244.csv Completed graceful shutdown