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 0.1.23-133090d [2018-10-04 09:23:52,421 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:23:52,423 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:23:52,437 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 09:23:52,437 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 09:23:52,438 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 09:23:52,439 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 09:23:52,441 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 09:23:52,443 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 09:23:52,443 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 09:23:52,444 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 09:23:52,445 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 09:23:52,445 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 09:23:52,446 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 09:23:52,447 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 09:23:52,448 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 09:23:52,449 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 09:23:52,450 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 09:23:52,452 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 09:23:52,455 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 09:23:52,457 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 09:23:52,458 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 09:23:52,460 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-04 09:23:52,468 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-04 09:23:52,483 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:23:52,484 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:23:52,484 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:23:52,485 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:23:52,485 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:23:52,485 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:23:52,486 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:23:52,486 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:23:52,486 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:23:52,486 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:23:52,486 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:23:52,487 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:23:52,487 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:23:52,487 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:23:52,487 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:23:52,487 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:23:52,488 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:23:52,488 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:23:52,488 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:23:52,488 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:23:52,488 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:23:52,489 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:23:52,489 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:23:52,489 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:23:52,489 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:23:52,489 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:23:52,490 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:23:52,490 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:23:52,490 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:23:52,490 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:23:52,539 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:23:52,556 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:23:52,563 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:23:52,565 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:23:52,565 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:23:52,566 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-10-04 09:23:52,566 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl' [2018-10-04 09:23:52,616 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:23:52,618 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:23:52,619 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:23:52,619 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:23:52,619 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:23:52,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:23:52" (1/1) ... [2018-10-04 09:23:52,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:23:52" (1/1) ... [2018-10-04 09:23:52,658 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 09:23:52,658 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 09:23:52,659 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 09:23:52,661 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:23:52,662 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:23:52,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:23:52,662 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:23:52,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:23:52" (1/1) ... [2018-10-04 09:23:52,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:23:52" (1/1) ... [2018-10-04 09:23:52,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:23:52" (1/1) ... [2018-10-04 09:23:52,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:23:52" (1/1) ... [2018-10-04 09:23:52,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:23:52" (1/1) ... [2018-10-04 09:23:52,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:23:52" (1/1) ... [2018-10-04 09:23:52,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:23:52" (1/1) ... [2018-10-04 09:23:52,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:23:52,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:23:52,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:23:52,686 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:23:52,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:23:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:23:52,760 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-04 09:23:52,760 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-04 09:23:52,761 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-04 09:23:52,924 INFO L338 CfgBuilder]: Using library mode [2018-10-04 09:23:52,924 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:23:52 BoogieIcfgContainer [2018-10-04 09:23:52,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:23:52,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:23:52,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:23:52,930 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:23:52,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:23:52" (1/2) ... [2018-10-04 09:23:52,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d1ba19 and model type DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:23:52, skipping insertion in model container [2018-10-04 09:23:52,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:23:52" (2/2) ... [2018-10-04 09:23:52,933 INFO L112 eAbstractionObserver]: Analyzing ICFG DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-10-04 09:23:52,942 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:23:52,950 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 09:23:52,999 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:23:53,000 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:23:53,000 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:23:53,000 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:23:53,001 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:23:53,001 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:23:53,001 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:23:53,001 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:23:53,001 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:23:53,016 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-10-04 09:23:53,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-10-04 09:23:53,022 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:53,023 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-10-04 09:23:53,024 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:53,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:53,031 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-10-04 09:23:53,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:53,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:53,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:53,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:23:53,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:53,547 WARN L178 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-10-04 09:23:53,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:53,551 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:23:53,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-04 09:23:53,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:23:53,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:23:53,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:23:53,571 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-10-04 09:23:53,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:53,644 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 09:23:53,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:23:53,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-10-04 09:23:53,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:53,664 INFO L225 Difference]: With dead ends: 9 [2018-10-04 09:23:53,665 INFO L226 Difference]: Without dead ends: 4 [2018-10-04 09:23:53,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:23:53,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-10-04 09:23:53,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-10-04 09:23:53,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-10-04 09:23:53,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-10-04 09:23:53,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-10-04 09:23:53,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:53,699 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-10-04 09:23:53,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:23:53,699 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-10-04 09:23:53,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-04 09:23:53,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:53,700 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-04 09:23:53,700 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:53,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:53,701 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-10-04 09:23:53,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:53,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:53,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:53,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:23:53,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:53,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:53,881 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:53,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:23:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:53,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:54,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:54,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-10-04 09:23:54,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:23:54,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:23:54,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:23:54,226 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 6 states. [2018-10-04 09:23:54,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:54,321 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-10-04 09:23:54,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:23:54,322 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-10-04 09:23:54,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:54,322 INFO L225 Difference]: With dead ends: 6 [2018-10-04 09:23:54,322 INFO L226 Difference]: Without dead ends: 5 [2018-10-04 09:23:54,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:23:54,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-04 09:23:54,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-04 09:23:54,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-04 09:23:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-04 09:23:54,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-04 09:23:54,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:54,327 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-04 09:23:54,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:23:54,327 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-04 09:23:54,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 09:23:54,328 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:54,328 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-10-04 09:23:54,328 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:54,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:54,329 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-10-04 09:23:54,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:54,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:54,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:54,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:23:54,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:54,490 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-10-04 09:23:54,656 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-04 09:23:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:54,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:54,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:54,700 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:23:54,715 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:23:54,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:54,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:54,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:54,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-10-04 09:23:54,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:23:54,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:23:54,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:23:54,812 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 8 states. [2018-10-04 09:23:54,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:54,862 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-10-04 09:23:54,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:23:54,867 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-10-04 09:23:54,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:54,870 INFO L225 Difference]: With dead ends: 7 [2018-10-04 09:23:54,870 INFO L226 Difference]: Without dead ends: 6 [2018-10-04 09:23:54,871 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 [2018-10-04 09:23:54,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-04 09:23:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-04 09:23:54,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-04 09:23:54,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-04 09:23:54,878 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-04 09:23:54,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:54,880 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-04 09:23:54,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:23:54,880 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-04 09:23:54,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 09:23:54,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:54,881 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-10-04 09:23:54,881 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:54,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:54,882 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-10-04 09:23:54,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:54,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:54,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:54,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:54,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:55,138 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-10-04 09:23:55,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:55,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:55,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:55,265 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:23:55,304 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 09:23:55,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:55,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:55,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:55,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-10-04 09:23:55,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:23:55,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:23:55,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:23:55,449 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 10 states. [2018-10-04 09:23:55,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:55,597 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-04 09:23:55,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:23:55,598 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-10-04 09:23:55,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:55,599 INFO L225 Difference]: With dead ends: 8 [2018-10-04 09:23:55,599 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 09:23:55,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:23:55,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 09:23:55,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 09:23:55,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 09:23:55,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 09:23:55,603 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-04 09:23:55,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:55,603 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 09:23:55,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:23:55,604 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 09:23:55,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 09:23:55,604 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:55,604 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-10-04 09:23:55,605 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:55,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:55,605 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-10-04 09:23:55,606 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:55,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:55,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:55,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:55,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:55,848 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-10-04 09:23:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:55,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:55,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:55,955 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:23:55,964 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:23:55,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:55,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:56,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:56,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:56,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-10-04 09:23:56,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:23:56,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:23:56,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:23:56,117 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 12 states. [2018-10-04 09:23:56,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:56,184 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 09:23:56,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:23:56,191 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-10-04 09:23:56,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:56,192 INFO L225 Difference]: With dead ends: 9 [2018-10-04 09:23:56,192 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 09:23:56,192 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 [2018-10-04 09:23:56,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 09:23:56,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 09:23:56,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 09:23:56,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-04 09:23:56,196 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-04 09:23:56,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:56,196 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-04 09:23:56,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:23:56,196 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-04 09:23:56,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 09:23:56,197 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:56,197 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-10-04 09:23:56,197 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:56,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:56,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-10-04 09:23:56,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:56,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:56,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:56,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:56,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:56,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:56,397 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 [2018-10-04 09:23:56,405 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:23:56,415 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 09:23:56,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:56,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:56,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:56,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-10-04 09:23:56,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:23:56,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:23:56,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:23:56,643 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 14 states. [2018-10-04 09:23:56,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:56,884 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-04 09:23:56,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:23:56,886 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2018-10-04 09:23:56,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:56,887 INFO L225 Difference]: With dead ends: 10 [2018-10-04 09:23:56,887 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 09:23:56,888 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 [2018-10-04 09:23:56,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 09:23:56,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 09:23:56,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 09:23:56,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 09:23:56,891 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-04 09:23:56,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:56,892 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 09:23:56,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:23:56,892 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 09:23:56,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 09:23:56,893 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:56,893 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-10-04 09:23:56,893 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:56,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:56,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-10-04 09:23:56,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:56,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:56,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:56,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:56,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:57,078 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:57,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:57,086 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:23:57,097 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-04 09:23:57,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:57,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:57,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:57,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-10-04 09:23:57,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:23:57,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:23:57,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:23:57,436 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 16 states. [2018-10-04 09:23:57,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:57,549 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 09:23:57,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:23:57,550 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 8 [2018-10-04 09:23:57,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:57,551 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:23:57,551 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 09:23:57,552 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 [2018-10-04 09:23:57,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 09:23:57,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 09:23:57,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 09:23:57,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-04 09:23:57,556 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-04 09:23:57,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:57,557 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-04 09:23:57,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:23:57,557 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-04 09:23:57,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 09:23:57,557 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:57,557 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-10-04 09:23:57,558 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:57,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:57,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-10-04 09:23:57,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:57,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:57,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:57,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:57,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:57,821 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:57,821 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:57,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:23:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:57,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:58,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:58,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-10-04 09:23:58,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:23:58,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:23:58,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:23:58,114 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 18 states. [2018-10-04 09:23:58,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:58,265 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-04 09:23:58,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:23:58,266 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 9 [2018-10-04 09:23:58,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:58,267 INFO L225 Difference]: With dead ends: 12 [2018-10-04 09:23:58,267 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 09:23:58,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:23:58,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 09:23:58,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 09:23:58,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 09:23:58,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 09:23:58,272 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-04 09:23:58,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:58,272 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 09:23:58,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:23:58,272 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 09:23:58,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 09:23:58,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:58,273 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-10-04 09:23:58,273 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:58,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:58,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-10-04 09:23:58,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:58,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:58,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:58,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:23:58,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:58,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:58,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:58,490 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:23:58,514 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:23:58,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:58,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:58,711 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:58,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:58,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-10-04 09:23:58,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:23:58,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:23:58,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:23:58,737 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 20 states. [2018-10-04 09:23:58,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:58,872 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 09:23:58,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:23:58,874 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 10 [2018-10-04 09:23:58,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:58,875 INFO L225 Difference]: With dead ends: 13 [2018-10-04 09:23:58,875 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 09:23:58,875 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 [2018-10-04 09:23:58,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 09:23:58,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 09:23:58,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 09:23:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-04 09:23:58,879 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-04 09:23:58,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:58,879 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-04 09:23:58,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:23:58,879 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-04 09:23:58,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:23:58,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:58,880 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-10-04 09:23:58,880 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:58,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:58,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-10-04 09:23:58,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:58,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:58,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:58,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:58,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:59,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:59,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:59,125 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:23:59,148 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 09:23:59,149 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:59,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:59,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:59,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-10-04 09:23:59,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:23:59,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:23:59,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:23:59,485 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 22 states. [2018-10-04 09:23:59,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:59,651 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-04 09:23:59,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:23:59,652 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 11 [2018-10-04 09:23:59,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:59,653 INFO L225 Difference]: With dead ends: 14 [2018-10-04 09:23:59,653 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 09:23:59,654 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 [2018-10-04 09:23:59,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 09:23:59,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 09:23:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 09:23:59,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 09:23:59,658 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-04 09:23:59,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:59,658 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 09:23:59,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:23:59,659 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 09:23:59,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 09:23:59,659 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:59,659 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-10-04 09:23:59,659 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:59,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:59,660 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-10-04 09:23:59,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:59,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:59,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:59,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:59,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:59,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:59,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:59,957 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:23:59,992 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:23:59,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:59,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:00,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:00,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-10-04 09:24:00,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 09:24:00,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 09:24:00,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:24:00,271 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 24 states. [2018-10-04 09:24:00,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:00,593 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 09:24:00,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:24:00,594 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 12 [2018-10-04 09:24:00,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:00,596 INFO L225 Difference]: With dead ends: 15 [2018-10-04 09:24:00,596 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 09:24:00,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:24:00,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 09:24:00,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 09:24:00,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 09:24:00,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-04 09:24:00,601 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-04 09:24:00,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:00,601 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-04 09:24:00,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 09:24:00,601 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-04 09:24:00,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:24:00,602 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:00,602 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-10-04 09:24:00,602 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:00,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:00,602 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-10-04 09:24:00,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:00,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:00,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:00,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:00,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:00,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:00,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:00,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:00,999 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:24:01,010 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 09:24:01,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:01,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:01,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:01,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-10-04 09:24:01,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 09:24:01,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 09:24:01,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:24:01,435 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 26 states. [2018-10-04 09:24:02,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:02,007 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-04 09:24:02,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:24:02,008 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 13 [2018-10-04 09:24:02,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:02,009 INFO L225 Difference]: With dead ends: 16 [2018-10-04 09:24:02,009 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 09:24:02,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:24:02,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 09:24:02,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 09:24:02,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 09:24:02,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 09:24:02,014 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-04 09:24:02,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:02,014 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 09:24:02,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 09:24:02,014 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 09:24:02,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 09:24:02,014 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:02,015 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-10-04 09:24:02,015 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:02,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:02,015 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-10-04 09:24:02,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:02,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:02,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:02,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:02,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:02,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:02,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:02,483 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:24:02,494 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:24:02,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:02,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:03,000 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:03,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:03,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-10-04 09:24:03,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 09:24:03,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 09:24:03,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:24:03,022 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 28 states. [2018-10-04 09:24:03,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:03,252 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 09:24:03,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 09:24:03,253 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 14 [2018-10-04 09:24:03,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:03,254 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:24:03,254 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 09:24:03,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:24:03,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 09:24:03,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 09:24:03,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 09:24:03,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-04 09:24:03,259 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-04 09:24:03,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:03,259 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-04 09:24:03,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 09:24:03,259 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-04 09:24:03,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:24:03,260 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:03,260 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-10-04 09:24:03,260 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:03,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:03,260 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-10-04 09:24:03,260 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:03,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:03,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:03,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:03,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:03,711 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-04 09:24:03,868 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:03,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:03,869 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:03,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:24:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:03,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:04,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:04,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-10-04 09:24:04,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 09:24:04,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 09:24:04,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:24:04,254 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 30 states. [2018-10-04 09:24:04,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:04,496 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-04 09:24:04,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 09:24:04,497 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 15 [2018-10-04 09:24:04,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:04,498 INFO L225 Difference]: With dead ends: 18 [2018-10-04 09:24:04,498 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 09:24:04,500 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 [2018-10-04 09:24:04,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 09:24:04,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 09:24:04,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 09:24:04,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 09:24:04,504 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-04 09:24:04,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:04,505 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 09:24:04,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 09:24:04,505 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 09:24:04,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 09:24:04,505 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:04,505 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-10-04 09:24:04,506 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:04,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:04,506 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-10-04 09:24:04,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:04,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:04,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:04,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:24:04,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:04,808 WARN L178 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-04 09:24:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:05,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:05,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:05,170 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:24:05,194 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:24:05,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:05,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:05,745 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:05,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-10-04 09:24:05,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 09:24:05,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 09:24:05,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:24:05,747 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 32 states. [2018-10-04 09:24:06,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:06,036 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 09:24:06,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 09:24:06,037 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 16 [2018-10-04 09:24:06,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:06,038 INFO L225 Difference]: With dead ends: 19 [2018-10-04 09:24:06,038 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 09:24:06,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:24:06,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 09:24:06,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 09:24:06,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 09:24:06,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-04 09:24:06,044 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-04 09:24:06,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:06,044 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-04 09:24:06,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 09:24:06,044 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-04 09:24:06,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:24:06,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:06,045 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-10-04 09:24:06,045 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:06,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:06,046 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-10-04 09:24:06,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:06,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:06,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:06,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:06,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:06,207 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-04 09:24:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:06,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:06,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:06,462 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:24:06,484 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:24:06,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:06,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:06,925 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:06,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:06,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-10-04 09:24:06,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 09:24:06,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 09:24:06,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:24:06,948 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 34 states. [2018-10-04 09:24:07,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:07,446 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-04 09:24:07,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 09:24:07,447 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 17 [2018-10-04 09:24:07,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:07,447 INFO L225 Difference]: With dead ends: 20 [2018-10-04 09:24:07,447 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 09:24:07,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:24:07,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 09:24:07,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 09:24:07,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 09:24:07,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 09:24:07,453 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-04 09:24:07,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:07,453 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 09:24:07,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 09:24:07,453 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 09:24:07,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 09:24:07,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:07,454 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-10-04 09:24:07,454 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:07,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:07,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-10-04 09:24:07,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:07,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:07,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:07,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:07,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:07,668 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-04 09:24:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:08,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:08,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:08,281 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:24:08,311 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:24:08,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:08,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:08,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:08,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-10-04 09:24:08,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 09:24:08,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 09:24:08,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1174, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:24:08,773 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 36 states. [2018-10-04 09:24:09,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:09,066 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 09:24:09,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 09:24:09,066 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 18 [2018-10-04 09:24:09,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:09,067 INFO L225 Difference]: With dead ends: 21 [2018-10-04 09:24:09,067 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 09:24:09,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=86, Invalid=1174, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:24:09,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 09:24:09,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 09:24:09,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:24:09,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-04 09:24:09,073 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-04 09:24:09,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:09,073 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-04 09:24:09,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 09:24:09,073 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-04 09:24:09,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:24:09,074 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:09,074 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-10-04 09:24:09,074 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:09,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:09,075 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-10-04 09:24:09,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:09,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:09,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:09,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:09,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:09,404 WARN L178 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-04 09:24:09,593 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-04 09:24:09,787 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-04 09:24:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:10,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:10,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:10,088 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:24:10,104 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 09:24:10,104 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:10,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:10,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:10,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-10-04 09:24:10,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 09:24:10,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 09:24:10,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:24:10,600 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 38 states. [2018-10-04 09:24:11,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:11,112 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-04 09:24:11,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:24:11,113 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 19 [2018-10-04 09:24:11,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:11,113 INFO L225 Difference]: With dead ends: 22 [2018-10-04 09:24:11,113 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 09:24:11,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:24:11,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 09:24:11,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 09:24:11,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 09:24:11,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 09:24:11,119 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-04 09:24:11,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:11,119 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 09:24:11,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 09:24:11,119 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 09:24:11,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 09:24:11,120 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:11,120 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-10-04 09:24:11,120 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:11,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:11,121 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-10-04 09:24:11,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:11,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:11,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:11,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:11,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:11,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:11,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:11,607 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:24:11,625 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-04 09:24:11,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:11,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:12,487 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:12,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-10-04 09:24:12,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 09:24:12,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 09:24:12,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:24:12,489 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 40 states. [2018-10-04 09:24:13,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:13,360 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 09:24:13,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 09:24:13,360 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 20 [2018-10-04 09:24:13,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:13,361 INFO L225 Difference]: With dead ends: 23 [2018-10-04 09:24:13,361 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 09:24:13,363 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 [2018-10-04 09:24:13,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 09:24:13,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 09:24:13,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:24:13,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-04 09:24:13,367 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-04 09:24:13,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:13,368 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-04 09:24:13,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 09:24:13,368 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-04 09:24:13,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 09:24:13,368 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:13,368 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-10-04 09:24:13,369 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:13,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:13,369 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-10-04 09:24:13,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:13,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:13,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:13,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:13,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:13,782 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:13,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:13,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:13,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:24:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:13,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:14,637 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:14,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-10-04 09:24:14,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 09:24:14,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 09:24:14,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1621, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:24:14,639 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 42 states. [2018-10-04 09:24:15,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:15,065 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-04 09:24:15,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 09:24:15,065 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 21 [2018-10-04 09:24:15,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:15,066 INFO L225 Difference]: With dead ends: 24 [2018-10-04 09:24:15,066 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 09:24:15,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=101, Invalid=1621, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:24:15,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 09:24:15,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 09:24:15,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 09:24:15,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 09:24:15,071 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-04 09:24:15,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:15,072 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 09:24:15,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 09:24:15,072 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 09:24:15,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 09:24:15,072 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:15,073 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-10-04 09:24:15,073 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:15,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:15,073 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-10-04 09:24:15,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:15,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:15,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:15,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:24:15,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:15,405 WARN L178 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-04 09:24:15,589 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-04 09:24:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:16,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:16,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:16,112 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:24:16,147 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:24:16,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:16,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:16,879 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:16,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:16,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-10-04 09:24:16,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 09:24:16,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 09:24:16,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:24:16,901 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 44 states. [2018-10-04 09:24:17,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:17,398 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 09:24:17,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 09:24:17,399 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 22 [2018-10-04 09:24:17,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:17,400 INFO L225 Difference]: With dead ends: 25 [2018-10-04 09:24:17,400 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 09:24:17,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:24:17,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 09:24:17,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 09:24:17,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:24:17,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-04 09:24:17,405 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-04 09:24:17,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:17,405 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-04 09:24:17,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 09:24:17,405 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-04 09:24:17,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 09:24:17,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:17,406 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-10-04 09:24:17,406 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:17,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:17,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-10-04 09:24:17,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:17,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:17,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:17,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:17,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:17,980 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:17,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:17,980 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:17,988 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:24:18,009 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 09:24:18,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:18,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:19,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:19,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-10-04 09:24:19,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 09:24:19,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 09:24:19,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1959, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:24:19,036 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 46 states. [2018-10-04 09:24:19,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:19,673 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-04 09:24:19,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 09:24:19,677 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 23 [2018-10-04 09:24:19,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:19,678 INFO L225 Difference]: With dead ends: 26 [2018-10-04 09:24:19,678 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 09:24:19,679 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 [2018-10-04 09:24:19,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 09:24:19,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 09:24:19,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 09:24:19,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 09:24:19,683 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-04 09:24:19,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:19,683 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 09:24:19,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 09:24:19,683 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 09:24:19,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 09:24:19,684 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:19,684 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-10-04 09:24:19,684 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:19,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:19,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-10-04 09:24:19,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:19,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:19,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:19,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:19,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:20,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:20,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:20,535 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:24:20,551 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:24:20,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:20,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:21,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:21,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-10-04 09:24:21,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 09:24:21,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 09:24:21,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2140, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:24:21,529 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 48 states. [2018-10-04 09:24:22,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:22,236 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 09:24:22,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 09:24:22,237 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 24 [2018-10-04 09:24:22,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:22,237 INFO L225 Difference]: With dead ends: 27 [2018-10-04 09:24:22,237 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 09:24:22,239 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 [2018-10-04 09:24:22,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 09:24:22,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 09:24:22,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:24:22,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-04 09:24:22,243 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-04 09:24:22,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:22,243 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-04 09:24:22,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 09:24:22,243 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-04 09:24:22,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 09:24:22,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:22,244 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-10-04 09:24:22,244 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:22,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:22,244 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-10-04 09:24:22,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:22,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:22,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:22,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:22,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:22,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:22,857 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:22,864 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:24:22,882 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 09:24:22,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:22,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:23,986 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:24,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:24,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-10-04 09:24:24,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 09:24:24,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 09:24:24,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2329, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:24:24,007 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 50 states. [2018-10-04 09:24:24,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:24,590 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-04 09:24:24,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 09:24:24,591 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 25 [2018-10-04 09:24:24,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:24,591 INFO L225 Difference]: With dead ends: 28 [2018-10-04 09:24:24,592 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 09:24:24,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=121, Invalid=2329, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:24:24,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 09:24:24,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 09:24:24,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 09:24:24,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 09:24:24,597 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-04 09:24:24,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:24,597 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 09:24:24,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 09:24:24,597 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 09:24:24,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 09:24:24,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:24,598 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-10-04 09:24:24,598 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:24,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:24,598 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-10-04 09:24:24,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:24,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:24,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:24,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:24,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:25,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:25,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:25,208 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:24:25,226 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 09:24:25,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:25,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:26,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:26,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-10-04 09:24:26,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 09:24:26,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 09:24:26,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2526, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:24:26,605 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 52 states. [2018-10-04 09:24:27,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:27,227 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 09:24:27,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 09:24:27,227 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 26 [2018-10-04 09:24:27,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:27,228 INFO L225 Difference]: With dead ends: 29 [2018-10-04 09:24:27,229 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 09:24:27,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=126, Invalid=2526, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:24:27,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 09:24:27,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 09:24:27,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:24:27,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-04 09:24:27,234 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-04 09:24:27,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:27,234 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-04 09:24:27,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 09:24:27,235 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-04 09:24:27,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 09:24:27,235 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:27,235 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-10-04 09:24:27,235 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:27,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:27,236 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-10-04 09:24:27,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:27,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:27,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:27,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:27,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:27,460 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-04 09:24:28,061 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:28,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:28,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:28,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:24:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:28,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:29,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:29,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-10-04 09:24:29,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 09:24:29,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 09:24:29,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2731, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:24:29,257 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 54 states. [2018-10-04 09:24:29,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:29,847 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-04 09:24:29,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 09:24:29,847 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 27 [2018-10-04 09:24:29,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:29,848 INFO L225 Difference]: With dead ends: 30 [2018-10-04 09:24:29,848 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 09:24:29,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=131, Invalid=2731, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:24:29,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 09:24:29,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 09:24:29,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 09:24:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 09:24:29,854 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-04 09:24:29,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:29,854 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 09:24:29,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 09:24:29,855 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 09:24:29,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 09:24:29,855 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:29,855 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-10-04 09:24:29,855 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:29,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:29,856 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-10-04 09:24:29,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:29,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:29,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:29,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:24:29,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:30,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:30,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:30,567 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:24:30,584 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:24:30,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:30,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:31,637 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:31,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:31,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-10-04 09:24:31,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 09:24:31,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 09:24:31,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2944, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:24:31,659 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 56 states. [2018-10-04 09:24:32,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:32,292 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 09:24:32,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 09:24:32,293 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 28 [2018-10-04 09:24:32,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:32,293 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:24:32,293 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 09:24:32,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=136, Invalid=2944, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:24:32,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 09:24:32,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 09:24:32,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:24:32,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-04 09:24:32,299 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-04 09:24:32,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:32,299 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-04 09:24:32,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 09:24:32,299 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-04 09:24:32,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 09:24:32,300 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:32,300 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-10-04 09:24:32,300 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:32,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:32,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-10-04 09:24:32,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:32,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:32,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:32,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:32,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:32,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:32,626 WARN L178 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-04 09:24:32,815 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-04 09:24:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:33,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:33,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:33,800 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:24:33,824 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 09:24:33,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:33,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:34,909 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:34,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:34,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-10-04 09:24:34,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 09:24:34,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 09:24:34,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=3165, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:24:34,932 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 58 states. [2018-10-04 09:24:35,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:35,669 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-04 09:24:35,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 09:24:35,670 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 29 [2018-10-04 09:24:35,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:35,670 INFO L225 Difference]: With dead ends: 32 [2018-10-04 09:24:35,671 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:24:35,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=141, Invalid=3165, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:24:35,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:24:35,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 09:24:35,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 09:24:35,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 09:24:35,676 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-04 09:24:35,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:35,676 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 09:24:35,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 09:24:35,677 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 09:24:35,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 09:24:35,677 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:35,677 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-10-04 09:24:35,677 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:35,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:35,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-10-04 09:24:35,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:35,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:35,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:35,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:35,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:36,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:36,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:36,485 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:24:36,503 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:24:36,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:36,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:37,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:37,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-10-04 09:24:37,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 09:24:37,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 09:24:37,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3394, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 09:24:37,651 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 60 states. [2018-10-04 09:24:38,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:38,439 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 09:24:38,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 09:24:38,440 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 30 [2018-10-04 09:24:38,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:38,441 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:24:38,441 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 09:24:38,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=146, Invalid=3394, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 09:24:38,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 09:24:38,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 09:24:38,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:24:38,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-04 09:24:38,447 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-04 09:24:38,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:38,447 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-04 09:24:38,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 09:24:38,447 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-04 09:24:38,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 09:24:38,448 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:38,448 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-10-04 09:24:38,448 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:38,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:38,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-10-04 09:24:38,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:38,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:38,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:38,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:38,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:39,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:39,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:39,471 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:24:39,495 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 09:24:39,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:39,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:41,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:41,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-10-04 09:24:41,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 09:24:41,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 09:24:41,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3631, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 09:24:41,071 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 62 states. [2018-10-04 09:24:42,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:42,012 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-04 09:24:42,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 09:24:42,012 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 31 [2018-10-04 09:24:42,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:42,013 INFO L225 Difference]: With dead ends: 34 [2018-10-04 09:24:42,013 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:24:42,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=151, Invalid=3631, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 09:24:42,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:24:42,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 09:24:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 09:24:42,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 09:24:42,019 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-04 09:24:42,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:42,019 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 09:24:42,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 09:24:42,019 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 09:24:42,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 09:24:42,020 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:42,020 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-10-04 09:24:42,020 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:42,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:42,020 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-10-04 09:24:42,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:42,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:42,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:42,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:42,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:42,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:42,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:42,902 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:24:42,926 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 09:24:42,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:42,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:44,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:44,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-10-04 09:24:44,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 09:24:44,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 09:24:44,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=3876, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 09:24:44,550 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 64 states. [2018-10-04 09:24:45,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:45,707 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 09:24:45,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 09:24:45,707 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 32 [2018-10-04 09:24:45,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:45,708 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:24:45,708 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 09:24:45,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=156, Invalid=3876, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 09:24:45,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 09:24:45,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 09:24:45,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:24:45,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-04 09:24:45,713 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-04 09:24:45,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:45,714 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-04 09:24:45,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 09:24:45,714 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-04 09:24:45,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 09:24:45,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:45,714 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-10-04 09:24:45,714 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:45,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:45,715 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-10-04 09:24:45,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:45,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:45,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:45,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:45,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:46,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:46,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:46,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:24:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:46,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:48,104 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:48,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:48,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-10-04 09:24:48,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 09:24:48,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 09:24:48,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=4129, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 09:24:48,125 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 66 states. [2018-10-04 09:24:49,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:49,666 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-04 09:24:49,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 09:24:49,667 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 33 [2018-10-04 09:24:49,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:49,667 INFO L225 Difference]: With dead ends: 36 [2018-10-04 09:24:49,668 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:24:49,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=161, Invalid=4129, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 09:24:49,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:24:49,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 09:24:49,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 09:24:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 09:24:49,673 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-04 09:24:49,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:49,673 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 09:24:49,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 09:24:49,673 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 09:24:49,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 09:24:49,674 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:49,674 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-10-04 09:24:49,674 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:49,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:49,674 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-10-04 09:24:49,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:49,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:49,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:49,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:24:49,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:50,547 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:50,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:50,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:50,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:24:50,578 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:24:50,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:50,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:52,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:52,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-10-04 09:24:52,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 09:24:52,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 09:24:52,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=4390, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 09:24:52,053 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 68 states. [2018-10-04 09:24:53,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:53,190 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 09:24:53,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 09:24:53,191 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 34 [2018-10-04 09:24:53,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:53,191 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:24:53,191 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 09:24:53,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=166, Invalid=4390, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 09:24:53,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 09:24:53,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 09:24:53,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 09:24:53,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-04 09:24:53,197 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-04 09:24:53,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:53,197 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-04 09:24:53,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 09:24:53,198 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-04 09:24:53,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 09:24:53,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:53,198 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-10-04 09:24:53,202 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:53,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:53,202 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-10-04 09:24:53,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:53,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:53,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:53,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:53,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:54,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:54,460 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:54,480 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:24:54,522 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 09:24:54,522 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:54,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:56,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:56,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-10-04 09:24:56,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 09:24:56,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 09:24:56,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=4659, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 09:24:56,158 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 70 states. [2018-10-04 09:24:57,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:57,516 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-04 09:24:57,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 09:24:57,516 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 35 [2018-10-04 09:24:57,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:57,517 INFO L225 Difference]: With dead ends: 38 [2018-10-04 09:24:57,517 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:24:57,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=171, Invalid=4659, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 09:24:57,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:24:57,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 09:24:57,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 09:24:57,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 09:24:57,522 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-04 09:24:57,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:57,523 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 09:24:57,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 09:24:57,523 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 09:24:57,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 09:24:57,523 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:57,524 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-10-04 09:24:57,524 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:57,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:57,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-10-04 09:24:57,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:57,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:57,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:57,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:57,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:57,850 WARN L178 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-04 09:24:58,792 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:58,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:58,793 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:58,800 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:24:58,821 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:24:58,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:58,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:00,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:00,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-10-04 09:25:00,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 09:25:00,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 09:25:00,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=4936, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 09:25:00,675 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 72 states. [2018-10-04 09:25:02,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:02,275 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 09:25:02,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 09:25:02,276 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 36 [2018-10-04 09:25:02,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:02,277 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:25:02,277 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 09:25:02,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=176, Invalid=4936, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 09:25:02,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 09:25:02,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-04 09:25:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 09:25:02,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-04 09:25:02,281 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-04 09:25:02,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:02,281 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-04 09:25:02,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 09:25:02,281 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-04 09:25:02,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 09:25:02,282 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:02,282 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-10-04 09:25:02,282 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:02,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:02,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-10-04 09:25:02,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:02,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:02,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:02,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:02,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:02,589 WARN L178 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-04 09:25:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:03,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:03,598 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:03,606 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:25:03,639 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 09:25:03,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:03,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:05,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:05,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-10-04 09:25:05,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 09:25:05,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 09:25:05,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=5221, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 09:25:05,623 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 74 states. [2018-10-04 09:25:07,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:07,187 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-04 09:25:07,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 09:25:07,188 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 37 [2018-10-04 09:25:07,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:07,188 INFO L225 Difference]: With dead ends: 40 [2018-10-04 09:25:07,189 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:25:07,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=181, Invalid=5221, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 09:25:07,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:25:07,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 09:25:07,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 09:25:07,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 09:25:07,195 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-04 09:25:07,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:07,195 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 09:25:07,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 09:25:07,195 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 09:25:07,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 09:25:07,195 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:07,196 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-10-04 09:25:07,196 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:07,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:07,197 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-10-04 09:25:07,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:07,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:07,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:07,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:07,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:08,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:08,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:08,366 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:25:08,396 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 09:25:08,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:08,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:10,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:10,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-10-04 09:25:10,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 09:25:10,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 09:25:10,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=5514, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 09:25:10,446 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 76 states. [2018-10-04 09:25:11,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:11,756 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 09:25:11,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 09:25:11,756 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 38 [2018-10-04 09:25:11,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:11,757 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:25:11,757 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 09:25:11,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=186, Invalid=5514, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 09:25:11,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 09:25:11,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 09:25:11,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 09:25:11,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-04 09:25:11,761 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-04 09:25:11,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:11,761 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-04 09:25:11,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 09:25:11,761 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-04 09:25:11,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 09:25:11,762 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:11,762 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-10-04 09:25:11,762 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:11,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:11,762 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-10-04 09:25:11,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:11,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:11,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:11,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:11,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:12,907 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:12,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:12,908 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:12,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:12,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:15,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:15,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-10-04 09:25:15,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 09:25:15,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 09:25:15,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=5815, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 09:25:15,088 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 78 states. [2018-10-04 09:25:17,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:17,221 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-04 09:25:17,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 09:25:17,221 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 39 [2018-10-04 09:25:17,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:17,222 INFO L225 Difference]: With dead ends: 42 [2018-10-04 09:25:17,222 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:25:17,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=191, Invalid=5815, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 09:25:17,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:25:17,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 09:25:17,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 09:25:17,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-04 09:25:17,226 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-04 09:25:17,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:17,226 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-04 09:25:17,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 09:25:17,226 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-04 09:25:17,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 09:25:17,227 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:17,227 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-10-04 09:25:17,227 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:17,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:17,227 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-10-04 09:25:17,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:17,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:17,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:17,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:17,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:18,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:18,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:18,494 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:25:18,517 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:25:18,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:18,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:20,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:20,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-10-04 09:25:20,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 09:25:20,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 09:25:20,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=6124, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 09:25:20,742 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 80 states. [2018-10-04 09:25:22,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:22,507 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 09:25:22,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 09:25:22,508 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 40 [2018-10-04 09:25:22,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:22,508 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:25:22,509 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 09:25:22,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=196, Invalid=6124, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 09:25:22,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 09:25:22,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-04 09:25:22,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 09:25:22,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-04 09:25:22,512 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-04 09:25:22,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:22,512 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-04 09:25:22,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 09:25:22,513 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-04 09:25:22,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 09:25:22,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:22,513 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-10-04 09:25:22,513 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:22,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:22,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-10-04 09:25:22,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:22,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:22,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:22,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:22,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:22,822 WARN L178 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-04 09:25:23,013 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-04 09:25:23,221 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-04 09:25:23,443 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-04 09:25:23,704 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-04 09:25:23,969 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-04 09:25:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:25,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:25,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:25,222 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:25:25,256 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 09:25:25,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:25,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:27,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:27,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-10-04 09:25:27,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 09:25:27,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 09:25:27,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=6441, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 09:25:27,325 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 82 states. [2018-10-04 09:25:28,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:28,984 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-04 09:25:28,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 09:25:28,984 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 41 [2018-10-04 09:25:28,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:28,985 INFO L225 Difference]: With dead ends: 44 [2018-10-04 09:25:28,985 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:25:28,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=201, Invalid=6441, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 09:25:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:25:28,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 09:25:28,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 09:25:28,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-04 09:25:28,990 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-04 09:25:28,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:28,990 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-04 09:25:28,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 09:25:28,990 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-04 09:25:28,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 09:25:28,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:28,991 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-10-04 09:25:28,991 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:28,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:28,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-10-04 09:25:28,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:28,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:28,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:28,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:28,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:30,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:30,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:30,453 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:25:30,478 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:25:30,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:30,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:32,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:32,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-10-04 09:25:32,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 09:25:32,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 09:25:32,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=6766, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 09:25:32,726 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 84 states. [2018-10-04 09:25:34,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:34,369 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 09:25:34,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 09:25:34,369 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 42 [2018-10-04 09:25:34,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:34,370 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:25:34,370 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 09:25:34,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=206, Invalid=6766, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 09:25:34,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 09:25:34,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-04 09:25:34,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 09:25:34,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-04 09:25:34,374 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-04 09:25:34,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:34,374 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-04 09:25:34,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 09:25:34,375 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-04 09:25:34,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 09:25:34,375 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:34,375 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-10-04 09:25:34,375 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:34,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:34,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-10-04 09:25:34,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:34,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:34,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:34,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:34,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:35,936 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:35,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:35,944 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:25:36,053 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 09:25:36,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:36,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:38,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:38,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-10-04 09:25:38,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 09:25:38,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 09:25:38,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=7099, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 09:25:38,378 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 86 states. [2018-10-04 09:25:40,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:40,114 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-04 09:25:40,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 09:25:40,114 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 43 [2018-10-04 09:25:40,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:40,115 INFO L225 Difference]: With dead ends: 46 [2018-10-04 09:25:40,115 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:25:40,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=211, Invalid=7099, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 09:25:40,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:25:40,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 09:25:40,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 09:25:40,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-04 09:25:40,120 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-04 09:25:40,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:40,120 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-04 09:25:40,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 09:25:40,120 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-04 09:25:40,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 09:25:40,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:40,121 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-10-04 09:25:40,121 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:40,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:40,121 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-10-04 09:25:40,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:40,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:40,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:40,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:40,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:40,480 WARN L178 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-04 09:25:40,669 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-04 09:25:42,180 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:42,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:42,180 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:42,187 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:25:42,224 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-04 09:25:42,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:42,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:44,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:44,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-10-04 09:25:44,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 09:25:44,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 09:25:44,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=7440, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 09:25:44,579 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 88 states. [2018-10-04 09:25:46,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:46,581 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 09:25:46,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 09:25:46,581 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 44 [2018-10-04 09:25:46,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:46,582 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:25:46,582 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 09:25:46,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=216, Invalid=7440, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 09:25:46,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 09:25:46,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 09:25:46,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 09:25:46,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-04 09:25:46,587 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-04 09:25:46,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:46,587 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-04 09:25:46,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 09:25:46,588 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-04 09:25:46,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-04 09:25:46,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:46,588 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-10-04 09:25:46,588 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:46,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:46,589 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-10-04 09:25:46,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:46,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:46,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:46,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:46,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:48,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:48,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:48,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:48,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:50,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:50,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-10-04 09:25:50,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 09:25:50,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 09:25:50,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=7789, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 09:25:50,919 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 90 states. [2018-10-04 09:25:52,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:52,951 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-04 09:25:52,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 09:25:52,951 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 45 [2018-10-04 09:25:52,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:52,952 INFO L225 Difference]: With dead ends: 48 [2018-10-04 09:25:52,952 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:25:52,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=221, Invalid=7789, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 09:25:52,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:25:52,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 09:25:52,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 09:25:52,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-04 09:25:52,956 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-04 09:25:52,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:52,957 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-04 09:25:52,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 09:25:52,957 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-04 09:25:52,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 09:25:52,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:52,957 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-10-04 09:25:52,957 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:52,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:52,958 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-10-04 09:25:52,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:52,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:52,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:52,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:52,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:53,296 WARN L178 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-04 09:25:53,473 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-04 09:25:53,680 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-04 09:25:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:55,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:55,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:55,100 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:25:55,126 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:25:55,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:55,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:58,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:58,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-10-04 09:25:58,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 09:25:58,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 09:25:58,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=8146, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 09:25:58,018 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 92 states. [2018-10-04 09:26:00,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:00,539 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 09:26:00,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 09:26:00,539 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 46 [2018-10-04 09:26:00,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:00,540 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:26:00,540 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 09:26:00,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=226, Invalid=8146, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 09:26:00,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 09:26:00,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-04 09:26:00,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 09:26:00,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-04 09:26:00,544 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-04 09:26:00,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:00,544 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-04 09:26:00,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 09:26:00,544 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-04 09:26:00,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 09:26:00,545 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:00,545 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-10-04 09:26:00,545 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:00,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:00,545 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-10-04 09:26:00,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:00,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:00,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:00,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:00,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:00,908 WARN L178 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-04 09:26:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:02,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:02,333 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:02,342 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:02,381 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 09:26:02,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:02,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:05,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:05,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-10-04 09:26:05,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 09:26:05,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 09:26:05,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=8511, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 09:26:05,049 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 94 states. [2018-10-04 09:26:07,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:07,921 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-04 09:26:07,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 09:26:07,922 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 47 [2018-10-04 09:26:07,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:07,922 INFO L225 Difference]: With dead ends: 50 [2018-10-04 09:26:07,923 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:26:07,923 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 [2018-10-04 09:26:07,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:26:07,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 09:26:07,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 09:26:07,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-04 09:26:07,926 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-04 09:26:07,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:07,927 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-04 09:26:07,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 09:26:07,927 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-04 09:26:07,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 09:26:07,927 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:07,927 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-10-04 09:26:07,927 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:07,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:07,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-10-04 09:26:07,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:07,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:07,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:07,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:07,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:09,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:09,507 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:09,515 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:09,546 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:09,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:09,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:12,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:12,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-10-04 09:26:12,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 09:26:12,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 09:26:12,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=8884, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 09:26:12,575 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 96 states. [2018-10-04 09:26:14,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:14,452 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 09:26:14,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 09:26:14,452 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 48 [2018-10-04 09:26:14,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:14,453 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:26:14,453 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 09:26:14,454 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 [2018-10-04 09:26:14,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 09:26:14,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 09:26:14,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 09:26:14,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-04 09:26:14,459 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-04 09:26:14,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:14,459 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-04 09:26:14,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 09:26:14,459 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-04 09:26:14,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-04 09:26:14,460 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:14,460 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-10-04 09:26:14,460 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:14,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:14,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-10-04 09:26:14,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:14,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:14,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:14,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:14,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:14,679 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-04 09:26:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:16,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:16,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:16,413 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:26:16,451 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 09:26:16,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:16,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:19,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:19,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-10-04 09:26:19,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 09:26:19,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 09:26:19,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=9265, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 09:26:19,348 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 98 states. [2018-10-04 09:26:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:22,211 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-04 09:26:22,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 09:26:22,211 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 49 [2018-10-04 09:26:22,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:22,212 INFO L225 Difference]: With dead ends: 52 [2018-10-04 09:26:22,212 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:26:22,213 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 [2018-10-04 09:26:22,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:26:22,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 09:26:22,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 09:26:22,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-04 09:26:22,217 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-04 09:26:22,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:22,217 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-04 09:26:22,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 09:26:22,217 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-04 09:26:22,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 09:26:22,218 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:22,218 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-10-04 09:26:22,218 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:22,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:22,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-10-04 09:26:22,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:22,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:22,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:22,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:22,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:23,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:23,928 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:23,937 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:26:23,977 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 09:26:23,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:23,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:27,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:27,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-10-04 09:26:27,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 09:26:27,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 09:26:27,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=9654, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 09:26:27,259 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 100 states. [2018-10-04 09:26:29,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:29,925 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 09:26:29,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 09:26:29,926 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 50 [2018-10-04 09:26:29,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:29,927 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:26:29,927 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 09:26:29,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=246, Invalid=9654, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 09:26:29,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 09:26:29,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 09:26:29,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 09:26:29,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-04 09:26:29,933 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-04 09:26:29,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:29,933 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-04 09:26:29,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 09:26:29,933 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-04 09:26:29,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 09:26:29,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:29,934 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-10-04 09:26:29,934 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:29,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:29,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-10-04 09:26:29,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:29,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:29,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:29,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:29,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:30,299 WARN L178 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-04 09:26:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:32,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:32,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:32,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:32,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:35,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:35,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-10-04 09:26:35,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 09:26:35,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 09:26:35,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=10051, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 09:26:35,384 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 102 states. [2018-10-04 09:26:37,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:37,785 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-04 09:26:37,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 09:26:37,785 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 51 [2018-10-04 09:26:37,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:37,786 INFO L225 Difference]: With dead ends: 54 [2018-10-04 09:26:37,786 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:26:37,787 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 [2018-10-04 09:26:37,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:26:37,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 09:26:37,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 09:26:37,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-04 09:26:37,792 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-04 09:26:37,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:37,792 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-04 09:26:37,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 09:26:37,792 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-04 09:26:37,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 09:26:37,793 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:37,793 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-10-04 09:26:37,793 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:37,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:37,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-10-04 09:26:37,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:37,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:37,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:37,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:37,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:38,082 WARN L178 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-04 09:26:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:39,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:39,759 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:39,769 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:26:39,811 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:26:39,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:39,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:43,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:43,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-10-04 09:26:43,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-04 09:26:43,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-04 09:26:43,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=10456, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 09:26:43,491 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 104 states. [2018-10-04 09:26:45,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:45,439 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 09:26:45,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 09:26:45,440 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 52 [2018-10-04 09:26:45,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:45,441 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:26:45,441 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 09:26:45,442 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 [2018-10-04 09:26:45,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 09:26:45,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-04 09:26:45,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 09:26:45,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-04 09:26:45,445 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-04 09:26:45,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:45,445 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-04 09:26:45,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-04 09:26:45,445 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-04 09:26:45,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 09:26:45,446 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:45,446 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-10-04 09:26:45,446 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:45,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:45,446 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-10-04 09:26:45,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:45,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:45,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:45,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:45,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:45,731 WARN L178 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-04 09:26:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:47,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:47,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:47,673 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:47,735 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 09:26:47,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:47,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:51,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:51,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-10-04 09:26:51,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-04 09:26:51,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-04 09:26:51,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=10869, Unknown=0, NotChecked=0, Total=11130 [2018-10-04 09:26:51,283 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 106 states. [2018-10-04 09:26:54,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:54,898 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-04 09:26:54,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 09:26:54,899 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 53 [2018-10-04 09:26:54,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:54,899 INFO L225 Difference]: With dead ends: 56 [2018-10-04 09:26:54,900 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:26:54,900 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 [2018-10-04 09:26:54,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:26:54,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 09:26:54,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 09:26:54,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-04 09:26:54,904 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-04 09:26:54,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:54,904 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-04 09:26:54,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-04 09:26:54,904 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-04 09:26:54,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 09:26:54,905 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:54,905 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-10-04 09:26:54,905 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:54,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:54,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-10-04 09:26:54,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:54,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:54,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:54,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:54,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:56,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:56,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:56,940 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:56,971 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:56,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:56,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:00,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:00,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-10-04 09:27:00,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-04 09:27:00,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-04 09:27:00,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=11290, Unknown=0, NotChecked=0, Total=11556 [2018-10-04 09:27:00,570 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 108 states. [2018-10-04 09:27:04,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:04,600 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 09:27:04,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 09:27:04,601 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 54 [2018-10-04 09:27:04,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:04,602 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:27:04,602 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 09:27:04,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=266, Invalid=11290, Unknown=0, NotChecked=0, Total=11556 [2018-10-04 09:27:04,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 09:27:04,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 09:27:04,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 09:27:04,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-04 09:27:04,606 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-04 09:27:04,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:04,606 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-04 09:27:04,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-04 09:27:04,606 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-04 09:27:04,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 09:27:04,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:04,606 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-10-04 09:27:04,606 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:04,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:04,607 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-10-04 09:27:04,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:04,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:04,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:04,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:04,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:04,770 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2018-10-04 09:27:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:06,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:06,639 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:06,646 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:06,695 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 09:27:06,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:06,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:10,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:10,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-10-04 09:27:10,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-04 09:27:10,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-04 09:27:10,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=11719, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 09:27:10,512 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 110 states. [2018-10-04 09:27:14,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:14,549 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-04 09:27:14,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 09:27:14,550 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 55 [2018-10-04 09:27:14,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:14,551 INFO L225 Difference]: With dead ends: 58 [2018-10-04 09:27:14,551 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:27:14,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=271, Invalid=11719, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 09:27:14,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:27:14,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 09:27:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 09:27:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-04 09:27:14,555 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-04 09:27:14,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:14,555 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-04 09:27:14,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-04 09:27:14,555 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-04 09:27:14,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 09:27:14,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:14,556 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-10-04 09:27:14,556 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:14,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:14,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-10-04 09:27:14,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:14,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:14,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:14,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:14,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:16,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:16,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:16,589 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:16,638 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 09:27:16,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:16,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:20,654 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:20,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-10-04 09:27:20,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-04 09:27:20,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-04 09:27:20,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=12156, Unknown=0, NotChecked=0, Total=12432 [2018-10-04 09:27:20,656 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 112 states. [2018-10-04 09:27:24,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:24,612 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 09:27:24,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 09:27:24,613 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 56 [2018-10-04 09:27:24,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:24,613 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:27:24,613 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 09:27:24,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=276, Invalid=12156, Unknown=0, NotChecked=0, Total=12432 [2018-10-04 09:27:24,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 09:27:24,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 09:27:24,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 09:27:24,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-04 09:27:24,618 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-04 09:27:24,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:24,618 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-04 09:27:24,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-04 09:27:24,618 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-04 09:27:24,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 09:27:24,618 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:24,618 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-10-04 09:27:24,619 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:24,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:24,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-10-04 09:27:24,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:24,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:24,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:24,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:24,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:24,824 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-04 09:27:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:26,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:26,841 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:26,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:26,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:30,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:31,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:31,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-10-04 09:27:31,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-04 09:27:31,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-04 09:27:31,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=12601, Unknown=0, NotChecked=0, Total=12882 [2018-10-04 09:27:31,016 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 114 states. [2018-10-04 09:27:35,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:35,118 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-04 09:27:35,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 09:27:35,119 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 57 [2018-10-04 09:27:35,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:35,119 INFO L225 Difference]: With dead ends: 60 [2018-10-04 09:27:35,120 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:27:35,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=281, Invalid=12601, Unknown=0, NotChecked=0, Total=12882 [2018-10-04 09:27:35,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:27:35,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 09:27:35,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 09:27:35,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-04 09:27:35,123 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-04 09:27:35,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:35,124 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-04 09:27:35,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-04 09:27:35,124 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-04 09:27:35,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 09:27:35,124 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:35,124 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-10-04 09:27:35,124 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:35,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:35,125 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-10-04 09:27:35,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:35,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:35,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:35,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:35,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:35,493 WARN L178 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-04 09:27:35,670 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-04 09:27:35,871 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-04 09:27:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:38,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:38,297 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:38,305 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:38,337 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:38,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:38,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:42,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:42,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-10-04 09:27:42,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-04 09:27:42,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-04 09:27:42,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=13054, Unknown=0, NotChecked=0, Total=13340 [2018-10-04 09:27:42,373 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 116 states. [2018-10-04 09:27:46,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:46,667 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 09:27:46,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 09:27:46,667 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 58 [2018-10-04 09:27:46,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:46,668 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:27:46,668 INFO L226 Difference]: Without dead ends: 60 [2018-10-04 09:27:46,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=286, Invalid=13054, Unknown=0, NotChecked=0, Total=13340 [2018-10-04 09:27:46,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-04 09:27:46,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-04 09:27:46,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 09:27:46,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-04 09:27:46,673 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-04 09:27:46,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:46,673 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-04 09:27:46,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-04 09:27:46,673 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-04 09:27:46,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 09:27:46,673 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:46,674 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-10-04 09:27:46,674 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:46,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:46,674 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-10-04 09:27:46,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:46,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:46,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:46,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:46,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:46,851 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-04 09:27:47,422 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-04 09:27:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:49,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:49,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:49,779 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:49,829 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-04 09:27:49,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:49,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:54,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:54,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-10-04 09:27:54,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-04 09:27:54,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-04 09:27:54,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=13515, Unknown=0, NotChecked=0, Total=13806 [2018-10-04 09:27:54,228 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 118 states. [2018-10-04 09:27:58,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:58,722 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-04 09:27:58,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 09:27:58,722 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 59 [2018-10-04 09:27:58,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:58,723 INFO L225 Difference]: With dead ends: 62 [2018-10-04 09:27:58,723 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 09:27:58,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=291, Invalid=13515, Unknown=0, NotChecked=0, Total=13806 [2018-10-04 09:27:58,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 09:27:58,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 09:27:58,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 09:27:58,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-04 09:27:58,729 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-04 09:27:58,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:58,729 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-04 09:27:58,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-04 09:27:58,730 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-04 09:27:58,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 09:27:58,730 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:58,730 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-10-04 09:27:58,730 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:58,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:58,731 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-10-04 09:27:58,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:58,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:58,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:58,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:58,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-04 09:28:01,014 WARN L186 SmtUtils]: Removed 3 from assertion stack [2018-10-04 09:28:01,015 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 09:28:01,019 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 09:28:01,019 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 09:28:01 BoogieIcfgContainer [2018-10-04 09:28:01,020 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 09:28:01,020 INFO L168 Benchmark]: Toolchain (without parser) took 248403.56 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -61.9 MB). Free memory was 1.4 GB in the beginning and 914.4 MB in the end (delta: 495.7 MB). Peak memory consumption was 433.8 MB. Max. memory is 7.1 GB. [2018-10-04 09:28:01,021 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:28:01,022 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.63 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. [2018-10-04 09:28:01,022 INFO L168 Benchmark]: Boogie Preprocessor took 23.07 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:28:01,022 INFO L168 Benchmark]: RCFGBuilder took 239.47 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 09:28:01,023 INFO L168 Benchmark]: TraceAbstraction took 248093.82 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -61.9 MB). Free memory was 1.4 GB in the beginning and 914.4 MB in the end (delta: 474.5 MB). Peak memory consumption was 412.7 MB. Max. memory is 7.1 GB. [2018-10-04 09:28:01,025 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 0.19 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 42.63 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 23.07 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 239.47 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 248093.82 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -61.9 MB). Free memory was 1.4 GB in the beginning and 914.4 MB in the end (delta: 474.5 MB). Peak memory consumption was 412.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 18]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 18). Cancelled while BasicCegarLoop was analyzing trace of length 61 with TraceHistMax 58, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 11. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 248.0s OverallTime, 59 OverallIterations, 58 TraceHistogramMax, 80.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 117 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 106860 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 67.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3421 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3421 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32509 ImplicationChecksByTransitivity, 157.6s 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, 1.8s SatisfiabilityAnalysisTime, 160.2s 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-0-2018-10-04_09-28-01-034.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-0-2018-10-04_09-28-01-034.csv Completed graceful shutdown