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-d19836b [2018-09-26 21:28:08,469 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:28:08,472 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:28:08,488 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:28:08,489 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:28:08,490 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:28:08,492 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:28:08,494 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:28:08,496 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:28:08,497 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:28:08,498 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-26 21:28:08,498 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-26 21:28:08,501 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-26 21:28:08,503 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-26 21:28:08,504 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-26 21:28:08,506 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-26 21:28:08,507 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-26 21:28:08,509 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-26 21:28:08,518 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-26 21:28:08,522 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-26 21:28:08,523 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-26 21:28:08,525 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-26 21:28:08,528 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-26 21:28:08,540 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-26 21:28:08,567 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:28:08,567 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:28:08,568 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:28:08,568 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:28:08,568 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:28:08,569 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:28:08,569 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:28:08,569 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:28:08,569 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:28:08,569 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:28:08,570 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:28:08,570 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:28:08,570 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:28:08,570 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:28:08,570 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:28:08,570 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:28:08,571 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:28:08,571 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:28:08,571 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:28:08,571 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:28:08,571 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:28:08,571 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:28:08,572 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:28:08,572 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:28:08,572 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:28:08,572 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:28:08,572 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:28:08,573 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:28:08,573 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:28:08,573 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:28:08,622 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:28:08,636 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:28:08,641 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:28:08,646 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:28:08,647 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:28:08,648 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-09-26 21:28:08,648 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl' [2018-09-26 21:28:08,705 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:28:08,708 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:28:08,709 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:28:08,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:28:08,710 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:28:08,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:08" (1/1) ... [2018-09-26 21:28:08,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:08" (1/1) ... [2018-09-26 21:28:08,750 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-26 21:28:08,751 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-26 21:28:08,751 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-26 21:28:08,753 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:28:08,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:28:08,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:28:08,754 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:28:08,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:08" (1/1) ... [2018-09-26 21:28:08,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:08" (1/1) ... [2018-09-26 21:28:08,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:08" (1/1) ... [2018-09-26 21:28:08,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:08" (1/1) ... [2018-09-26 21:28:08,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:08" (1/1) ... [2018-09-26 21:28:08,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:08" (1/1) ... [2018-09-26 21:28:08,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:08" (1/1) ... [2018-09-26 21:28:08,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:28:08,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:28:08,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:28:08,780 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:28:08,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:28:08,862 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-26 21:28:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-26 21:28:08,862 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-26 21:28:09,065 INFO L343 CfgBuilder]: Using library mode [2018-09-26 21:28:09,066 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:28:09 BoogieIcfgContainer [2018-09-26 21:28:09,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:28:09,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:28:09,068 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:28:09,072 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:28:09,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:08" (1/2) ... [2018-09-26 21:28:09,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1ef4f3 and model type DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:28:09, skipping insertion in model container [2018-09-26 21:28:09,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:28:09" (2/2) ... [2018-09-26 21:28:09,076 INFO L112 eAbstractionObserver]: Analyzing ICFG DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-09-26 21:28:09,088 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:28:09,102 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:28:09,164 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:28:09,165 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:28:09,165 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:28:09,165 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:28:09,166 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:28:09,166 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:28:09,166 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:28:09,166 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:28:09,166 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:28:09,183 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-26 21:28:09,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-26 21:28:09,199 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:09,200 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-26 21:28:09,205 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:09,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:09,216 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-09-26 21:28:09,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:09,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:09,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:09,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:09,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:09,694 WARN L178 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-09-26 21:28:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:09,699 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:28:09,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-26 21:28:09,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:28:09,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:28:09,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:28:09,719 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-26 21:28:09,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:09,796 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-26 21:28:09,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:28:09,798 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-26 21:28:09,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:09,809 INFO L225 Difference]: With dead ends: 9 [2018-09-26 21:28:09,810 INFO L226 Difference]: Without dead ends: 4 [2018-09-26 21:28:09,813 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 [2018-09-26 21:28:09,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-09-26 21:28:09,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-09-26 21:28:09,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-09-26 21:28:09,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-09-26 21:28:09,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-09-26 21:28:09,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:09,848 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-09-26 21:28:09,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:28:09,848 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-09-26 21:28:09,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-26 21:28:09,848 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:09,849 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-26 21:28:09,849 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:09,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:09,849 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-09-26 21:28:09,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:09,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:09,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:09,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:09,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:10,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:10,031 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:10,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:10,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:10,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:10,405 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:10,406 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-09-26 21:28:10,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:28:10,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:28:10,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:28:10,407 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 6 states. [2018-09-26 21:28:10,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:10,560 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-09-26 21:28:10,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:28:10,561 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-09-26 21:28:10,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:10,562 INFO L225 Difference]: With dead ends: 6 [2018-09-26 21:28:10,563 INFO L226 Difference]: Without dead ends: 5 [2018-09-26 21:28:10,565 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 [2018-09-26 21:28:10,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-26 21:28:10,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-26 21:28:10,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-26 21:28:10,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-26 21:28:10,569 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-26 21:28:10,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:10,569 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-26 21:28:10,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:28:10,570 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-26 21:28:10,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 21:28:10,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:10,571 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-09-26 21:28:10,571 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:10,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:10,572 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-09-26 21:28:10,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:10,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:10,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:10,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:10,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:10,876 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-26 21:28:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:10,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:10,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:10,917 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:28:10,924 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:28:10,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:10,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:11,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:11,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-09-26 21:28:11,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:28:11,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:28:11,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:28:11,130 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 8 states. [2018-09-26 21:28:11,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:11,180 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-09-26 21:28:11,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:28:11,187 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-09-26 21:28:11,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:11,187 INFO L225 Difference]: With dead ends: 7 [2018-09-26 21:28:11,188 INFO L226 Difference]: Without dead ends: 6 [2018-09-26 21:28:11,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:28:11,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-26 21:28:11,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-26 21:28:11,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-26 21:28:11,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-26 21:28:11,192 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-26 21:28:11,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:11,192 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-26 21:28:11,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:28:11,192 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-26 21:28:11,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-26 21:28:11,193 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:11,193 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-09-26 21:28:11,194 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:11,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:11,194 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-09-26 21:28:11,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:11,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:11,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:11,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:11,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:11,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:11,441 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:11,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:11,450 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:28:11,457 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-26 21:28:11,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:11,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:11,651 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:11,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-26 21:28:11,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:28:11,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:28:11,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:28:11,653 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 10 states. [2018-09-26 21:28:11,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:11,792 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-26 21:28:11,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:28:11,793 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-09-26 21:28:11,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:11,794 INFO L225 Difference]: With dead ends: 8 [2018-09-26 21:28:11,794 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 21:28:11,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:28:11,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 21:28:11,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 21:28:11,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 21:28:11,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-26 21:28:11,798 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-26 21:28:11,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:11,798 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-26 21:28:11,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:28:11,799 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-26 21:28:11,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:28:11,799 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:11,799 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-09-26 21:28:11,800 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:11,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:11,800 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-09-26 21:28:11,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:11,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:11,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:11,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:11,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:12,073 WARN L178 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-09-26 21:28:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:12,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:12,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:12,187 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:28:12,208 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:28:12,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:12,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:12,393 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:12,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-26 21:28:12,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:28:12,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:28:12,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:28:12,397 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 12 states. [2018-09-26 21:28:12,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:12,456 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-26 21:28:12,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:28:12,457 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-09-26 21:28:12,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:12,458 INFO L225 Difference]: With dead ends: 9 [2018-09-26 21:28:12,458 INFO L226 Difference]: Without dead ends: 8 [2018-09-26 21:28:12,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:28:12,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-26 21:28:12,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-26 21:28:12,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-26 21:28:12,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-26 21:28:12,462 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-26 21:28:12,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:12,462 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-26 21:28:12,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:28:12,463 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-26 21:28:12,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:28:12,463 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:12,463 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-09-26 21:28:12,464 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:12,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:12,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-09-26 21:28:12,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:12,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:12,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:12,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:12,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:12,644 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:12,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:12,655 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:28:12,664 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-26 21:28:12,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:12,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:12,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:12,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-26 21:28:12,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:28:12,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:28:12,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:28:12,962 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 14 states. [2018-09-26 21:28:13,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:13,199 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-26 21:28:13,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:28:13,200 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2018-09-26 21:28:13,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:13,201 INFO L225 Difference]: With dead ends: 10 [2018-09-26 21:28:13,201 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 21:28:13,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:28:13,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 21:28:13,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-26 21:28:13,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:28:13,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-26 21:28:13,206 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-26 21:28:13,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:13,206 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-26 21:28:13,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:28:13,206 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-26 21:28:13,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:28:13,207 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:13,207 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-09-26 21:28:13,207 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:13,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:13,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-09-26 21:28:13,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:13,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:13,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:13,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:13,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:13,401 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:13,401 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:13,409 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:28:13,418 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-26 21:28:13,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:13,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:13,739 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:13,739 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-09-26 21:28:13,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:28:13,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:28:13,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:28:13,741 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 16 states. [2018-09-26 21:28:13,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:13,861 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-26 21:28:13,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:28:13,862 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 8 [2018-09-26 21:28:13,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:13,862 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:28:13,862 INFO L226 Difference]: Without dead ends: 10 [2018-09-26 21:28:13,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:28:13,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-26 21:28:13,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-26 21:28:13,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-26 21:28:13,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-26 21:28:13,867 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-26 21:28:13,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:13,867 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-26 21:28:13,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:28:13,868 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-26 21:28:13,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:28:13,868 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:13,868 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-09-26 21:28:13,869 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:13,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:13,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-09-26 21:28:13,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:13,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:13,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:13,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:13,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:14,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:14,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:14,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:14,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:14,325 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:14,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-26 21:28:14,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:28:14,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:28:14,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:28:14,327 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 18 states. [2018-09-26 21:28:14,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:14,454 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-26 21:28:14,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:28:14,454 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 9 [2018-09-26 21:28:14,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:14,455 INFO L225 Difference]: With dead ends: 12 [2018-09-26 21:28:14,456 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:28:14,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:28:14,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:28:14,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-26 21:28:14,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:28:14,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-26 21:28:14,460 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-26 21:28:14,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:14,461 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-26 21:28:14,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:28:14,461 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-26 21:28:14,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:28:14,461 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:14,462 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-09-26 21:28:14,462 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:14,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:14,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-09-26 21:28:14,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:14,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:14,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:14,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:14,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:14,676 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:14,676 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:14,693 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:28:14,719 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:28:14,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:14,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:14,918 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:14,942 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:14,943 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-09-26 21:28:14,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:28:14,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:28:14,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:28:14,944 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 20 states. [2018-09-26 21:28:15,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:15,082 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-26 21:28:15,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:28:15,084 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 10 [2018-09-26 21:28:15,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:15,085 INFO L225 Difference]: With dead ends: 13 [2018-09-26 21:28:15,085 INFO L226 Difference]: Without dead ends: 12 [2018-09-26 21:28:15,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:28:15,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-26 21:28:15,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-26 21:28:15,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-26 21:28:15,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-26 21:28:15,090 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-26 21:28:15,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:15,090 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-26 21:28:15,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:28:15,091 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-26 21:28:15,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:28:15,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:15,091 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-09-26 21:28:15,091 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:15,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:15,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-09-26 21:28:15,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:15,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:15,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:15,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:15,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:15,337 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:15,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:15,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:15,347 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:28:15,369 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:28:15,369 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:15,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:15,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:15,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-09-26 21:28:15,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:28:15,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:28:15,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:28:15,682 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 22 states. [2018-09-26 21:28:15,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:15,854 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-26 21:28:15,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:28:15,855 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 11 [2018-09-26 21:28:15,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:15,855 INFO L225 Difference]: With dead ends: 14 [2018-09-26 21:28:15,856 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:28:15,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:28:15,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:28:15,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 21:28:15,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:28:15,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-26 21:28:15,861 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-26 21:28:15,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:15,861 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-26 21:28:15,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:28:15,861 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-26 21:28:15,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:28:15,862 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:15,862 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-09-26 21:28:15,862 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:15,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:15,862 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-09-26 21:28:15,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:15,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:15,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:15,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:15,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:16,088 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-09-26 21:28:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:16,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:16,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:16,369 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:28:16,379 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:28:16,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:16,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:16,657 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:16,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-26 21:28:16,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:28:16,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:28:16,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:28:16,659 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 24 states. [2018-09-26 21:28:17,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:17,025 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-26 21:28:17,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:28:17,026 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 12 [2018-09-26 21:28:17,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:17,027 INFO L225 Difference]: With dead ends: 15 [2018-09-26 21:28:17,027 INFO L226 Difference]: Without dead ends: 14 [2018-09-26 21:28:17,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:28:17,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-26 21:28:17,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-26 21:28:17,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:28:17,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-26 21:28:17,032 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-26 21:28:17,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:17,033 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-26 21:28:17,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:28:17,033 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-26 21:28:17,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:28:17,033 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:17,033 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-09-26 21:28:17,034 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:17,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:17,034 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-09-26 21:28:17,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:17,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:17,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:17,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:17,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:17,354 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:17,355 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:17,363 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:28:17,376 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:28:17,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:17,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:17,708 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:17,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-26 21:28:17,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:28:17,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:28:17,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:28:17,710 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 26 states. [2018-09-26 21:28:18,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:18,304 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-26 21:28:18,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:28:18,305 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 13 [2018-09-26 21:28:18,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:18,306 INFO L225 Difference]: With dead ends: 16 [2018-09-26 21:28:18,306 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:28:18,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:28:18,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:28:18,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-26 21:28:18,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:28:18,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-26 21:28:18,311 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-26 21:28:18,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:18,311 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-26 21:28:18,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:28:18,311 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-26 21:28:18,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:28:18,312 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:18,312 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-09-26 21:28:18,312 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:18,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:18,312 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-09-26 21:28:18,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:18,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:18,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:18,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:18,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:18,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:18,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:18,750 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:28:18,768 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:28:18,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:18,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:19,208 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:19,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:19,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-09-26 21:28:19,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:28:19,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:28:19,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:28:19,229 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 28 states. [2018-09-26 21:28:19,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:19,430 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-26 21:28:19,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:28:19,430 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 14 [2018-09-26 21:28:19,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:19,431 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:28:19,432 INFO L226 Difference]: Without dead ends: 16 [2018-09-26 21:28:19,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:28:19,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-26 21:28:19,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-26 21:28:19,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:28:19,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-26 21:28:19,437 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-26 21:28:19,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:19,437 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-26 21:28:19,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:28:19,438 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-26 21:28:19,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:28:19,438 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:19,438 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-09-26 21:28:19,438 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:19,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:19,439 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-09-26 21:28:19,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:19,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:19,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:19,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:19,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:19,940 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:19,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:19,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:19,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:19,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:20,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:20,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-26 21:28:20,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:28:20,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:28:20,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:28:20,371 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 30 states. [2018-09-26 21:28:20,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:20,635 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-26 21:28:20,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:28:20,635 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 15 [2018-09-26 21:28:20,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:20,636 INFO L225 Difference]: With dead ends: 18 [2018-09-26 21:28:20,637 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:28:20,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:28:20,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:28:20,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-26 21:28:20,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-26 21:28:20,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-26 21:28:20,642 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-26 21:28:20,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:20,643 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-26 21:28:20,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:28:20,643 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-26 21:28:20,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:28:20,643 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:20,643 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-09-26 21:28:20,644 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:20,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:20,644 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-09-26 21:28:20,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:20,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:20,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:20,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:20,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:20,938 WARN L178 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-26 21:28:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:21,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:21,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:21,299 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:28:21,309 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:28:21,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:21,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:21,910 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:21,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-09-26 21:28:21,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:28:21,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:28:21,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:28:21,911 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 32 states. [2018-09-26 21:28:22,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:22,205 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-26 21:28:22,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:28:22,206 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 16 [2018-09-26 21:28:22,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:22,207 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:28:22,207 INFO L226 Difference]: Without dead ends: 18 [2018-09-26 21:28:22,208 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 [2018-09-26 21:28:22,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-26 21:28:22,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-26 21:28:22,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:28:22,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-26 21:28:22,212 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-26 21:28:22,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:22,213 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-26 21:28:22,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:28:22,213 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-26 21:28:22,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:28:22,214 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:22,214 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-09-26 21:28:22,214 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:22,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:22,214 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-09-26 21:28:22,214 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:22,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:22,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:22,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:22,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:22,547 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:22,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:22,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:28:22,577 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:28:22,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:22,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:23,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:23,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-09-26 21:28:23,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:28:23,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:28:23,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:28:23,066 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 34 states. [2018-09-26 21:28:23,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:23,666 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-26 21:28:23,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:28:23,666 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 17 [2018-09-26 21:28:23,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:23,667 INFO L225 Difference]: With dead ends: 20 [2018-09-26 21:28:23,667 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:28:23,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:28:23,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:28:23,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-26 21:28:23,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:28:23,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-26 21:28:23,673 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-26 21:28:23,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:23,673 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-26 21:28:23,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:28:23,673 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-26 21:28:23,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:28:23,674 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:23,674 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-09-26 21:28:23,674 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:23,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:23,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-09-26 21:28:23,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:23,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:23,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:23,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:23,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:24,060 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:24,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:24,068 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:28:24,099 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:28:24,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:24,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:24,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:24,582 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-26 21:28:24,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:28:24,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:28:24,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1174, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:28:24,583 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 36 states. [2018-09-26 21:28:24,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:24,863 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-26 21:28:24,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:28:24,864 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 18 [2018-09-26 21:28:24,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:24,865 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:28:24,865 INFO L226 Difference]: Without dead ends: 20 [2018-09-26 21:28:24,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=1174, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:28:24,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-26 21:28:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-26 21:28:24,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:28:24,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-26 21:28:24,870 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-26 21:28:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:24,870 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-26 21:28:24,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:28:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-26 21:28:24,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:28:24,871 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:24,871 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-09-26 21:28:24,871 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:24,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:24,872 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-09-26 21:28:24,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:24,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:24,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:24,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:24,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:24,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:25,210 WARN L178 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-26 21:28:25,387 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-26 21:28:25,589 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-26 21:28:25,812 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-26 21:28:26,157 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:26,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:26,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:26,166 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:28:26,181 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-26 21:28:26,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:26,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:26,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:26,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-09-26 21:28:26,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:28:26,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:28:26,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:28:26,709 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 38 states. [2018-09-26 21:28:27,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:27,254 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-26 21:28:27,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:28:27,254 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 19 [2018-09-26 21:28:27,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:27,255 INFO L225 Difference]: With dead ends: 22 [2018-09-26 21:28:27,255 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:28:27,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:28:27,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:28:27,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 21:28:27,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:28:27,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-26 21:28:27,260 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-26 21:28:27,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:27,260 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-26 21:28:27,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:28:27,261 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-26 21:28:27,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:28:27,261 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:27,261 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-09-26 21:28:27,261 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:27,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:27,262 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-09-26 21:28:27,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:27,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:27,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:27,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:27,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:27,535 WARN L178 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-26 21:28:27,874 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:27,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:27,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:27,884 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:28:27,903 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-26 21:28:27,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:27,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:28,751 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:28,751 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-09-26 21:28:28,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:28:28,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:28:28,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:28:28,753 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 40 states. [2018-09-26 21:28:29,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:29,581 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-26 21:28:29,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:28:29,582 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 20 [2018-09-26 21:28:29,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:29,583 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:28:29,583 INFO L226 Difference]: Without dead ends: 22 [2018-09-26 21:28:29,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:28:29,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-26 21:28:29,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-26 21:28:29,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:28:29,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-26 21:28:29,587 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-26 21:28:29,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:29,587 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-26 21:28:29,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:28:29,588 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-26 21:28:29,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:28:29,588 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:29,588 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-09-26 21:28:29,589 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:29,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:29,589 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-09-26 21:28:29,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:29,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:29,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:29,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:29,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:30,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:30,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:30,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:30,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:30,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:30,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-26 21:28:30,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:28:30,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:28:30,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1621, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:28:30,901 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 42 states. [2018-09-26 21:28:31,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:31,316 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-26 21:28:31,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:28:31,317 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 21 [2018-09-26 21:28:31,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:31,318 INFO L225 Difference]: With dead ends: 24 [2018-09-26 21:28:31,318 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:28:31,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=1621, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:28:31,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:28:31,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-26 21:28:31,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 21:28:31,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-26 21:28:31,324 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-26 21:28:31,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:31,324 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-26 21:28:31,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:28:31,325 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-26 21:28:31,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:28:31,325 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:31,325 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-09-26 21:28:31,326 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:31,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:31,326 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-09-26 21:28:31,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:31,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:31,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:31,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:31,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:31,671 WARN L178 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-26 21:28:31,851 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-26 21:28:32,045 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-26 21:28:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:32,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:32,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:32,417 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:28:32,446 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:28:32,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:32,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:33,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:33,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-09-26 21:28:33,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:28:33,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:28:33,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:28:33,249 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 44 states. [2018-09-26 21:28:33,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:33,929 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-26 21:28:33,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:28:33,929 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 22 [2018-09-26 21:28:33,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:33,930 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:28:33,930 INFO L226 Difference]: Without dead ends: 24 [2018-09-26 21:28:33,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:28:33,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-26 21:28:33,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-26 21:28:33,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:28:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-26 21:28:33,936 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-26 21:28:33,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:33,936 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-26 21:28:33,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:28:33,936 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-26 21:28:33,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-26 21:28:33,937 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:33,937 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-09-26 21:28:33,937 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:33,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:33,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-09-26 21:28:33,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:33,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:33,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:33,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:33,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:34,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:34,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:34,492 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:28:34,511 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-26 21:28:34,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:34,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:35,453 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:35,454 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-09-26 21:28:35,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:28:35,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:28:35,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1959, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:28:35,455 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 46 states. [2018-09-26 21:28:36,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:36,017 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-26 21:28:36,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:28:36,020 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 23 [2018-09-26 21:28:36,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:36,021 INFO L225 Difference]: With dead ends: 26 [2018-09-26 21:28:36,021 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:28:36,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=1959, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:28:36,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:28:36,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-26 21:28:36,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:28:36,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-26 21:28:36,026 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-26 21:28:36,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:36,027 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-26 21:28:36,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:28:36,027 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-26 21:28:36,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:28:36,027 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:36,027 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-09-26 21:28:36,028 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:36,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:36,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-09-26 21:28:36,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:36,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:36,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:36,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:36,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:36,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:36,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:36,854 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:28:36,868 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:28:36,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:36,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:37,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:37,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-26 21:28:37,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:28:37,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:28:37,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2140, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:28:37,853 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 48 states. [2018-09-26 21:28:38,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:38,593 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-26 21:28:38,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:28:38,594 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 24 [2018-09-26 21:28:38,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:38,594 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:28:38,594 INFO L226 Difference]: Without dead ends: 26 [2018-09-26 21:28:38,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=116, Invalid=2140, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:28:38,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-26 21:28:38,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-26 21:28:38,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:28:38,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-26 21:28:38,600 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-26 21:28:38,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:38,601 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-26 21:28:38,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:28:38,601 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-26 21:28:38,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-26 21:28:38,602 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:38,602 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-09-26 21:28:38,602 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:38,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:38,602 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-09-26 21:28:38,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:38,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:38,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:38,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:38,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:39,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:39,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:39,281 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:28:39,299 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-26 21:28:39,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:39,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:40,336 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:40,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-26 21:28:40,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:28:40,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:28:40,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2329, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:28:40,338 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 50 states. [2018-09-26 21:28:40,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:40,933 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-26 21:28:40,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:28:40,934 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 25 [2018-09-26 21:28:40,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:40,935 INFO L225 Difference]: With dead ends: 28 [2018-09-26 21:28:40,935 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:28:40,936 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 [2018-09-26 21:28:40,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:28:40,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-26 21:28:40,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-26 21:28:40,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-26 21:28:40,940 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-26 21:28:40,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:40,940 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-26 21:28:40,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:28:40,940 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-26 21:28:40,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:28:40,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:40,941 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-09-26 21:28:40,941 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:40,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:40,941 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-09-26 21:28:40,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:40,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:40,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:40,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:40,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:41,530 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:41,530 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:41,537 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:28:41,557 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-26 21:28:41,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:41,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:42,963 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:42,964 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-09-26 21:28:42,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:28:42,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:28:42,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2526, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:28:42,965 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 52 states. [2018-09-26 21:28:43,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:43,614 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-26 21:28:43,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:28:43,614 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 26 [2018-09-26 21:28:43,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:43,615 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:28:43,615 INFO L226 Difference]: Without dead ends: 28 [2018-09-26 21:28:43,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=126, Invalid=2526, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:28:43,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-26 21:28:43,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-26 21:28:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:28:43,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-26 21:28:43,622 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-26 21:28:43,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:43,622 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-26 21:28:43,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:28:43,622 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-26 21:28:43,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-26 21:28:43,623 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:43,623 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-09-26 21:28:43,623 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:43,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:43,623 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-09-26 21:28:43,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:43,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:43,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:43,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:43,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:43,802 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-26 21:28:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:44,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:44,414 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:44,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:44,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:45,439 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:45,459 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:45,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-26 21:28:45,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:28:45,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:28:45,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2731, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:28:45,461 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 54 states. [2018-09-26 21:28:46,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:46,050 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-26 21:28:46,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:28:46,050 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 27 [2018-09-26 21:28:46,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:46,051 INFO L225 Difference]: With dead ends: 30 [2018-09-26 21:28:46,051 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:28:46,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=131, Invalid=2731, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:28:46,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:28:46,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-26 21:28:46,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:28:46,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-26 21:28:46,057 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-26 21:28:46,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:46,057 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-26 21:28:46,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:28:46,058 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-26 21:28:46,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:28:46,058 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:46,058 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-09-26 21:28:46,059 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:46,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:46,059 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-09-26 21:28:46,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:46,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:46,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:46,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:46,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:46,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:46,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:46,783 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:28:46,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:28:46,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:46,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:47,886 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:47,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:47,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-09-26 21:28:47,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:28:47,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:28:47,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2944, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:28:47,909 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 56 states. [2018-09-26 21:28:48,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:48,537 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-26 21:28:48,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:28:48,537 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 28 [2018-09-26 21:28:48,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:48,538 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:28:48,538 INFO L226 Difference]: Without dead ends: 30 [2018-09-26 21:28:48,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=136, Invalid=2944, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:28:48,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-26 21:28:48,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-26 21:28:48,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:28:48,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-26 21:28:48,544 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-26 21:28:48,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:48,544 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-26 21:28:48,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:28:48,544 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-26 21:28:48,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-26 21:28:48,545 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:48,545 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-09-26 21:28:48,545 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:48,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:48,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-09-26 21:28:48,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:48,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:48,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:48,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:48,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:48,724 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-26 21:28:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:49,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:49,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:49,486 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:28:49,514 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-26 21:28:49,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:49,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:50,660 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:50,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:50,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-09-26 21:28:50,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:28:50,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:28:50,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=3165, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:28:50,683 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 58 states. [2018-09-26 21:28:51,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:51,406 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-26 21:28:51,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:28:51,406 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 29 [2018-09-26 21:28:51,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:51,407 INFO L225 Difference]: With dead ends: 32 [2018-09-26 21:28:51,407 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:28:51,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=141, Invalid=3165, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:28:51,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:28:51,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-26 21:28:51,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:28:51,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-26 21:28:51,413 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-26 21:28:51,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:51,413 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-26 21:28:51,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:28:51,413 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-26 21:28:51,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-26 21:28:51,414 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:51,414 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-09-26 21:28:51,414 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:51,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:51,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-09-26 21:28:51,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:51,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:51,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:51,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:51,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:52,186 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:52,186 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:52,194 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:28:52,212 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:28:52,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:52,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:53,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:53,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-26 21:28:53,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:28:53,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:28:53,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3394, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:28:53,361 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 60 states. [2018-09-26 21:28:54,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:54,234 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-26 21:28:54,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:28:54,234 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 30 [2018-09-26 21:28:54,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:54,235 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:28:54,235 INFO L226 Difference]: Without dead ends: 32 [2018-09-26 21:28:54,236 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 [2018-09-26 21:28:54,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-26 21:28:54,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-26 21:28:54,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:28:54,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-26 21:28:54,241 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-26 21:28:54,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:54,241 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-26 21:28:54,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:28:54,241 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-26 21:28:54,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-26 21:28:54,242 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:54,242 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-09-26 21:28:54,242 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:54,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:54,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-09-26 21:28:54,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:54,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:54,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:54,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:54,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:55,144 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:55,144 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:55,157 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:28:55,188 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-26 21:28:55,188 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:55,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:56,798 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:56,818 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:56,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-09-26 21:28:56,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:28:56,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:28:56,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3631, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:28:56,819 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 62 states. [2018-09-26 21:28:57,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:57,735 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-26 21:28:57,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:28:57,736 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 31 [2018-09-26 21:28:57,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:57,736 INFO L225 Difference]: With dead ends: 34 [2018-09-26 21:28:57,736 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:28:57,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=151, Invalid=3631, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:28:57,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:28:57,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-26 21:28:57,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-26 21:28:57,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-26 21:28:57,742 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-26 21:28:57,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:57,742 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-26 21:28:57,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:28:57,743 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-26 21:28:57,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:28:57,743 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:57,743 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-09-26 21:28:57,743 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:57,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:57,744 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-09-26 21:28:57,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:57,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:57,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:57,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:57,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:58,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:58,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:58,585 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:28:58,613 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-26 21:28:58,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:58,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:00,136 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:00,136 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-09-26 21:29:00,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-26 21:29:00,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-26 21:29:00,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=3876, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:29:00,138 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 64 states. [2018-09-26 21:29:01,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:01,297 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-26 21:29:01,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:29:01,297 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 32 [2018-09-26 21:29:01,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:01,298 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:29:01,298 INFO L226 Difference]: Without dead ends: 34 [2018-09-26 21:29:01,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=156, Invalid=3876, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:29:01,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-26 21:29:01,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-26 21:29:01,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:29:01,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-26 21:29:01,303 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-26 21:29:01,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:01,303 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-26 21:29:01,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-26 21:29:01,303 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-26 21:29:01,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-26 21:29:01,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:01,304 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-09-26 21:29:01,304 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:01,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:01,304 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-09-26 21:29:01,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:01,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:01,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:01,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:01,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:01,578 WARN L178 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-26 21:29:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:02,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:02,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:29:02,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:02,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:03,877 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:03,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:03,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-26 21:29:03,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-26 21:29:03,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-26 21:29:03,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=4129, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:29:03,899 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 66 states. [2018-09-26 21:29:05,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:05,405 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-26 21:29:05,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:29:05,405 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 33 [2018-09-26 21:29:05,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:05,406 INFO L225 Difference]: With dead ends: 36 [2018-09-26 21:29:05,406 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:29:05,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=161, Invalid=4129, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:29:05,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:29:05,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-26 21:29:05,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:29:05,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-26 21:29:05,411 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-26 21:29:05,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:05,412 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-26 21:29:05,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-26 21:29:05,412 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-26 21:29:05,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:29:05,412 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:05,412 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-09-26 21:29:05,412 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:05,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:05,413 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-09-26 21:29:05,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:05,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:05,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:05,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:05,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:06,307 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:06,307 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:29:06,315 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:06,348 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:06,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:06,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:07,810 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:07,810 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-09-26 21:29:07,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:29:07,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:29:07,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=4390, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:29:07,812 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 68 states. [2018-09-26 21:29:08,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:08,952 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-26 21:29:08,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:29:08,952 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 34 [2018-09-26 21:29:08,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:08,953 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:29:08,953 INFO L226 Difference]: Without dead ends: 36 [2018-09-26 21:29:08,954 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 [2018-09-26 21:29:08,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-26 21:29:08,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-26 21:29:08,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-26 21:29:08,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-26 21:29:08,961 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-26 21:29:08,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:08,961 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-26 21:29:08,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:29:08,961 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-26 21:29:08,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-26 21:29:08,962 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:08,962 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-09-26 21:29:08,962 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:08,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:08,962 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-09-26 21:29:08,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:08,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:08,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:08,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:08,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:10,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:10,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:29:10,150 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:10,190 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-26 21:29:10,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:10,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:11,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:11,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-09-26 21:29:11,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-26 21:29:11,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-26 21:29:11,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=4659, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:29:11,715 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 70 states. [2018-09-26 21:29:13,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:13,046 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-26 21:29:13,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:29:13,046 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 35 [2018-09-26 21:29:13,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:13,047 INFO L225 Difference]: With dead ends: 38 [2018-09-26 21:29:13,047 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:29:13,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=171, Invalid=4659, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:29:13,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:29:13,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-26 21:29:13,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-26 21:29:13,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-26 21:29:13,053 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-26 21:29:13,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:13,053 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-26 21:29:13,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-26 21:29:13,053 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-26 21:29:13,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-26 21:29:13,054 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:13,054 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-09-26 21:29:13,054 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:13,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:13,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-09-26 21:29:13,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:13,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:13,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:13,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:13,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:13,382 WARN L178 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-26 21:29:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:14,431 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:14,431 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:29:14,450 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:14,471 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:14,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:14,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:16,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:16,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-26 21:29:16,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:29:16,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:29:16,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=4936, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:29:16,100 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 72 states. [2018-09-26 21:29:17,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:17,608 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-26 21:29:17,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:29:17,609 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 36 [2018-09-26 21:29:17,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:17,609 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:29:17,609 INFO L226 Difference]: Without dead ends: 38 [2018-09-26 21:29:17,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=176, Invalid=4936, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:29:17,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-26 21:29:17,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-26 21:29:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-26 21:29:17,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-26 21:29:17,613 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-26 21:29:17,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:17,614 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-26 21:29:17,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:29:17,614 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-26 21:29:17,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-26 21:29:17,614 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:17,614 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-09-26 21:29:17,614 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:17,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:17,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-09-26 21:29:17,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:17,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:17,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:17,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:17,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:17,973 WARN L178 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-26 21:29:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:18,971 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:18,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:29:18,979 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:19,012 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-26 21:29:19,012 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:19,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:20,916 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:20,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:20,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-09-26 21:29:20,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-26 21:29:20,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-26 21:29:20,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=5221, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:29:20,937 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 74 states. [2018-09-26 21:29:22,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:22,455 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-26 21:29:22,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:29:22,455 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 37 [2018-09-26 21:29:22,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:22,456 INFO L225 Difference]: With dead ends: 40 [2018-09-26 21:29:22,456 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:29:22,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=181, Invalid=5221, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:29:22,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:29:22,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-26 21:29:22,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-26 21:29:22,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-26 21:29:22,461 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-26 21:29:22,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:22,461 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-26 21:29:22,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-26 21:29:22,462 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-26 21:29:22,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:29:22,462 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:22,462 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-09-26 21:29:22,462 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:22,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:22,463 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-09-26 21:29:22,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:22,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:22,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:22,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:22,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:22,806 WARN L178 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-26 21:29:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:23,898 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:23,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:29:23,906 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:29:23,935 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-26 21:29:23,935 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:23,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:25,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:25,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-09-26 21:29:25,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-26 21:29:25,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-26 21:29:25,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=5514, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:29:25,967 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 76 states. [2018-09-26 21:29:27,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:27,190 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-26 21:29:27,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:29:27,191 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 38 [2018-09-26 21:29:27,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:27,192 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:29:27,192 INFO L226 Difference]: Without dead ends: 40 [2018-09-26 21:29:27,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=186, Invalid=5514, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:29:27,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-26 21:29:27,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-26 21:29:27,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-26 21:29:27,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-26 21:29:27,196 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-26 21:29:27,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:27,196 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-26 21:29:27,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-26 21:29:27,196 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-26 21:29:27,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-26 21:29:27,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:27,197 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-09-26 21:29:27,197 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:27,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:27,198 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-09-26 21:29:27,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:27,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:27,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:27,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:27,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:28,342 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:28,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:29:28,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:28,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:30,382 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:30,382 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-26 21:29:30,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-26 21:29:30,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-26 21:29:30,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=5815, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:29:30,383 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 78 states. [2018-09-26 21:29:32,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:32,456 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-26 21:29:32,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:29:32,457 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 39 [2018-09-26 21:29:32,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:32,458 INFO L225 Difference]: With dead ends: 42 [2018-09-26 21:29:32,458 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:29:32,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=191, Invalid=5815, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:29:32,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:29:32,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-26 21:29:32,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:29:32,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-26 21:29:32,462 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-26 21:29:32,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:32,463 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-26 21:29:32,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-26 21:29:32,463 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-26 21:29:32,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:29:32,463 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:32,463 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-09-26 21:29:32,464 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:32,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:32,464 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-09-26 21:29:32,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:32,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:32,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:32,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:32,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:32,620 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-26 21:29:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:33,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:33,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:29:33,799 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:33,825 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:33,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:33,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:36,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:36,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-09-26 21:29:36,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-26 21:29:36,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-26 21:29:36,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=6124, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:29:36,072 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 80 states. [2018-09-26 21:29:37,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:37,764 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-26 21:29:37,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:29:37,765 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 40 [2018-09-26 21:29:37,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:37,766 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:29:37,766 INFO L226 Difference]: Without dead ends: 42 [2018-09-26 21:29:37,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=196, Invalid=6124, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:29:37,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-26 21:29:37,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-26 21:29:37,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-26 21:29:37,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-26 21:29:37,770 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-26 21:29:37,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:37,770 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-26 21:29:37,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-26 21:29:37,770 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-26 21:29:37,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-26 21:29:37,771 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:37,771 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-09-26 21:29:37,771 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:37,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:37,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-09-26 21:29:37,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:37,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:37,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:37,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:37,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:38,113 WARN L178 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-26 21:29:38,295 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-26 21:29:38,498 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-26 21:29:39,594 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:39,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:39,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:29:39,614 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:39,653 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-26 21:29:39,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:39,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:41,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:41,915 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-09-26 21:29:41,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-26 21:29:41,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-26 21:29:41,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=6441, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:29:41,916 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 82 states. [2018-09-26 21:29:43,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:43,583 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-26 21:29:43,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:29:43,584 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 41 [2018-09-26 21:29:43,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:43,585 INFO L225 Difference]: With dead ends: 44 [2018-09-26 21:29:43,585 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:29:43,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=201, Invalid=6441, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:29:43,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:29:43,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-26 21:29:43,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-26 21:29:43,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-26 21:29:43,589 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-26 21:29:43,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:43,590 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-26 21:29:43,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-26 21:29:43,590 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-26 21:29:43,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:29:43,590 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:43,590 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-09-26 21:29:43,590 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:43,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:43,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-09-26 21:29:43,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:43,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:43,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:43,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:43,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:43,957 WARN L178 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-26 21:29:44,152 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-26 21:29:44,344 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-26 21:29:44,574 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-26 21:29:44,797 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-26 21:29:45,086 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-26 21:29:45,412 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-26 21:29:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:46,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:46,715 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:29:46,722 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:46,749 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:46,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:46,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:48,940 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:48,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-26 21:29:48,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-26 21:29:48,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-26 21:29:48,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=6766, Unknown=0, NotChecked=0, Total=6972 [2018-09-26 21:29:48,942 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 84 states. [2018-09-26 21:29:50,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:50,652 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-26 21:29:50,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:29:50,652 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 42 [2018-09-26 21:29:50,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:50,653 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:29:50,653 INFO L226 Difference]: Without dead ends: 44 [2018-09-26 21:29:50,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=206, Invalid=6766, Unknown=0, NotChecked=0, Total=6972 [2018-09-26 21:29:50,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-26 21:29:50,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-26 21:29:50,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-26 21:29:50,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-26 21:29:50,657 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-26 21:29:50,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:50,657 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-26 21:29:50,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-26 21:29:50,658 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-26 21:29:50,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-26 21:29:50,658 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:50,658 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-09-26 21:29:50,658 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:50,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:50,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-09-26 21:29:50,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:50,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:50,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:50,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:50,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:50,873 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-26 21:29:52,071 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:52,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:52,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:29:52,080 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:52,187 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-26 21:29:52,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:52,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:54,432 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:54,452 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:54,453 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-09-26 21:29:54,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-26 21:29:54,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-26 21:29:54,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=7099, Unknown=0, NotChecked=0, Total=7310 [2018-09-26 21:29:54,454 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 86 states. [2018-09-26 21:29:56,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:56,234 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-26 21:29:56,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:29:56,234 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 43 [2018-09-26 21:29:56,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:56,235 INFO L225 Difference]: With dead ends: 46 [2018-09-26 21:29:56,235 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:29:56,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=211, Invalid=7099, Unknown=0, NotChecked=0, Total=7310 [2018-09-26 21:29:56,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:29:56,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-26 21:29:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-26 21:29:56,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-26 21:29:56,240 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-26 21:29:56,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:56,240 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-26 21:29:56,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-26 21:29:56,240 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-26 21:29:56,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:29:56,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:56,241 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-09-26 21:29:56,241 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:56,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:56,241 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-09-26 21:29:56,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:56,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:56,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:56,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:56,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:57,658 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:57,658 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:57,658 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:29:57,665 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:29:57,699 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-26 21:29:57,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:57,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:00,015 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:00,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-09-26 21:30:00,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-26 21:30:00,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-26 21:30:00,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=7440, Unknown=0, NotChecked=0, Total=7656 [2018-09-26 21:30:00,016 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 88 states. [2018-09-26 21:30:01,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:01,933 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-26 21:30:01,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:30:01,933 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 44 [2018-09-26 21:30:01,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:01,934 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:30:01,934 INFO L226 Difference]: Without dead ends: 46 [2018-09-26 21:30:01,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=216, Invalid=7440, Unknown=0, NotChecked=0, Total=7656 [2018-09-26 21:30:01,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-26 21:30:01,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-26 21:30:01,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-26 21:30:01,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-26 21:30:01,938 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-26 21:30:01,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:01,938 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-26 21:30:01,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-26 21:30:01,938 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-26 21:30:01,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-26 21:30:01,939 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:01,939 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-09-26 21:30:01,939 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:01,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:01,939 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-09-26 21:30:01,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:01,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:01,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:01,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:01,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:02,109 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-26 21:30:03,400 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:03,400 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:03,400 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:03,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:03,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:06,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:06,134 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-26 21:30:06,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-26 21:30:06,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-26 21:30:06,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=7789, Unknown=0, NotChecked=0, Total=8010 [2018-09-26 21:30:06,135 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 90 states. [2018-09-26 21:30:08,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:08,088 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-26 21:30:08,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:30:08,088 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 45 [2018-09-26 21:30:08,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:08,089 INFO L225 Difference]: With dead ends: 48 [2018-09-26 21:30:08,089 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:30:08,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=221, Invalid=7789, Unknown=0, NotChecked=0, Total=8010 [2018-09-26 21:30:08,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:30:08,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-26 21:30:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-26 21:30:08,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-26 21:30:08,093 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-26 21:30:08,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:08,093 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-26 21:30:08,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-26 21:30:08,094 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-26 21:30:08,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-26 21:30:08,094 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:08,094 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-09-26 21:30:08,094 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:08,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:08,094 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-09-26 21:30:08,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:08,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:08,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:08,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:08,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:08,280 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-26 21:30:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:09,639 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:09,639 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:09,647 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:09,675 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:09,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:09,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:12,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:12,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-09-26 21:30:12,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-26 21:30:12,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-26 21:30:12,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=8146, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:30:12,466 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 92 states. [2018-09-26 21:30:14,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:14,953 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-26 21:30:14,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:30:14,954 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 46 [2018-09-26 21:30:14,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:14,954 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:30:14,954 INFO L226 Difference]: Without dead ends: 48 [2018-09-26 21:30:14,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=226, Invalid=8146, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:30:14,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-26 21:30:14,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-26 21:30:14,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-26 21:30:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-26 21:30:14,958 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-26 21:30:14,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:14,958 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-26 21:30:14,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-26 21:30:14,958 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-26 21:30:14,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-26 21:30:14,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:14,959 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-09-26 21:30:14,959 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:14,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:14,960 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-09-26 21:30:14,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:14,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:14,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:14,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:14,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:16,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:16,794 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:16,803 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:16,840 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-26 21:30:16,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:16,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:19,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:19,532 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:19,533 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-09-26 21:30:19,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-26 21:30:19,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-26 21:30:19,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=8511, Unknown=0, NotChecked=0, Total=8742 [2018-09-26 21:30:19,534 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 94 states. [2018-09-26 21:30:22,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:22,403 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-26 21:30:22,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:30:22,403 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 47 [2018-09-26 21:30:22,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:22,404 INFO L225 Difference]: With dead ends: 50 [2018-09-26 21:30:22,404 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:30:22,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=231, Invalid=8511, Unknown=0, NotChecked=0, Total=8742 [2018-09-26 21:30:22,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:30:22,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-26 21:30:22,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-26 21:30:22,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-26 21:30:22,409 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-26 21:30:22,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:22,409 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-26 21:30:22,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-26 21:30:22,409 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-26 21:30:22,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-26 21:30:22,410 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:22,410 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-09-26 21:30:22,410 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:22,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:22,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-09-26 21:30:22,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:22,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:22,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:22,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:22,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:22,582 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-26 21:30:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:24,036 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:24,036 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:24,042 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:24,073 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:24,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:24,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:27,225 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:27,225 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-09-26 21:30:27,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-26 21:30:27,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-26 21:30:27,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=8884, Unknown=0, NotChecked=0, Total=9120 [2018-09-26 21:30:27,226 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 96 states. [2018-09-26 21:30:29,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:29,178 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-26 21:30:29,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:30:29,178 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 48 [2018-09-26 21:30:29,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:29,179 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:30:29,180 INFO L226 Difference]: Without dead ends: 50 [2018-09-26 21:30:29,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=236, Invalid=8884, Unknown=0, NotChecked=0, Total=9120 [2018-09-26 21:30:29,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-26 21:30:29,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-26 21:30:29,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-26 21:30:29,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-26 21:30:29,184 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-26 21:30:29,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:29,185 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-26 21:30:29,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-26 21:30:29,185 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-26 21:30:29,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-26 21:30:29,185 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:29,185 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-09-26 21:30:29,186 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:29,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:29,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-09-26 21:30:29,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:29,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:29,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:29,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:29,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:29,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:29,517 WARN L178 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-26 21:30:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:31,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:31,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:31,116 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:31,160 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-26 21:30:31,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:31,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:34,274 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:34,274 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-26 21:30:34,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-26 21:30:34,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-26 21:30:34,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=9265, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:30:34,275 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 98 states. [2018-09-26 21:30:37,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:37,186 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-26 21:30:37,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:30:37,187 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 49 [2018-09-26 21:30:37,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:37,188 INFO L225 Difference]: With dead ends: 52 [2018-09-26 21:30:37,188 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:30:37,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=241, Invalid=9265, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:30:37,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:30:37,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-26 21:30:37,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-26 21:30:37,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-26 21:30:37,193 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-26 21:30:37,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:37,194 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-26 21:30:37,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-26 21:30:37,194 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-26 21:30:37,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-26 21:30:37,194 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:37,194 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-09-26 21:30:37,194 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:37,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:37,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-09-26 21:30:37,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:37,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:37,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:37,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:37,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:38,946 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:38,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:38,953 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:38,993 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-26 21:30:38,993 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:38,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:42,291 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:42,291 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-09-26 21:30:42,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-26 21:30:42,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-26 21:30:42,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=9654, Unknown=0, NotChecked=0, Total=9900 [2018-09-26 21:30:42,292 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 100 states. [2018-09-26 21:30:44,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:44,997 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-26 21:30:44,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:30:44,997 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 50 [2018-09-26 21:30:44,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:44,998 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:30:44,998 INFO L226 Difference]: Without dead ends: 52 [2018-09-26 21:30:44,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=246, Invalid=9654, Unknown=0, NotChecked=0, Total=9900 [2018-09-26 21:30:44,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-26 21:30:45,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-26 21:30:45,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-26 21:30:45,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-26 21:30:45,003 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-26 21:30:45,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:45,004 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-26 21:30:45,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-26 21:30:45,004 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-26 21:30:45,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-26 21:30:45,004 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:45,004 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-09-26 21:30:45,005 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:45,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:45,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-09-26 21:30:45,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:45,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:45,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:45,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:45,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:46,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:46,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:46,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:46,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:50,161 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:50,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-26 21:30:50,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-26 21:30:50,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-26 21:30:50,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=10051, Unknown=0, NotChecked=0, Total=10302 [2018-09-26 21:30:50,163 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 102 states. [2018-09-26 21:30:52,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:52,580 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-26 21:30:52,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:30:52,581 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 51 [2018-09-26 21:30:52,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:52,582 INFO L225 Difference]: With dead ends: 54 [2018-09-26 21:30:52,582 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:30:52,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=251, Invalid=10051, Unknown=0, NotChecked=0, Total=10302 [2018-09-26 21:30:52,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:30:52,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-26 21:30:52,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-26 21:30:52,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-26 21:30:52,587 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-26 21:30:52,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:52,587 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-26 21:30:52,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-26 21:30:52,587 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-26 21:30:52,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:30:52,588 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:52,588 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-09-26 21:30:52,588 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:52,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:52,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-09-26 21:30:52,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:52,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:52,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:52,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:52,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:52,778 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-26 21:30:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:54,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:54,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:54,495 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:54,535 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:54,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:54,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:58,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:58,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-09-26 21:30:58,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-26 21:30:58,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-26 21:30:58,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=10456, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:30:58,180 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 104 states. [2018-09-26 21:31:00,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:00,119 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-26 21:31:00,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:31:00,119 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 52 [2018-09-26 21:31:00,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:00,120 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:31:00,121 INFO L226 Difference]: Without dead ends: 54 [2018-09-26 21:31:00,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=256, Invalid=10456, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:31:00,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-26 21:31:00,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-26 21:31:00,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-26 21:31:00,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-26 21:31:00,125 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-26 21:31:00,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:00,126 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-26 21:31:00,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-26 21:31:00,126 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-26 21:31:00,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-26 21:31:00,126 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:00,126 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-09-26 21:31:00,126 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:00,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:00,127 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-09-26 21:31:00,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:00,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:00,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:00,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:00,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:00,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:00,305 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-26 21:31:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:02,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:02,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:02,414 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:02,476 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-26 21:31:02,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:02,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:05,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:06,003 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:06,003 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-09-26 21:31:06,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-26 21:31:06,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-26 21:31:06,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=10869, Unknown=0, NotChecked=0, Total=11130 [2018-09-26 21:31:06,005 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 106 states. [2018-09-26 21:31:09,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:09,556 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-26 21:31:09,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:31:09,556 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 53 [2018-09-26 21:31:09,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:09,557 INFO L225 Difference]: With dead ends: 56 [2018-09-26 21:31:09,557 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:31:09,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=261, Invalid=10869, Unknown=0, NotChecked=0, Total=11130 [2018-09-26 21:31:09,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:31:09,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-26 21:31:09,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-26 21:31:09,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-26 21:31:09,561 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-26 21:31:09,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:09,561 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-26 21:31:09,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-26 21:31:09,562 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-26 21:31:09,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-26 21:31:09,562 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:09,562 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-09-26 21:31:09,562 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:09,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:09,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-09-26 21:31:09,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:09,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:09,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:09,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:09,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:09,909 WARN L178 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-26 21:31:10,092 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-26 21:31:10,298 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-26 21:31:12,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:12,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:12,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:12,507 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:12,540 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:12,540 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:12,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:16,068 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:16,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-26 21:31:16,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-26 21:31:16,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-26 21:31:16,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=11290, Unknown=0, NotChecked=0, Total=11556 [2018-09-26 21:31:16,069 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 108 states. [2018-09-26 21:31:20,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:20,095 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-26 21:31:20,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:31:20,096 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 54 [2018-09-26 21:31:20,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:20,097 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:31:20,097 INFO L226 Difference]: Without dead ends: 56 [2018-09-26 21:31:20,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=266, Invalid=11290, Unknown=0, NotChecked=0, Total=11556 [2018-09-26 21:31:20,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-26 21:31:20,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-26 21:31:20,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-26 21:31:20,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-26 21:31:20,101 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-26 21:31:20,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:20,101 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-26 21:31:20,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-26 21:31:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-26 21:31:20,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-26 21:31:20,102 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:20,102 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-09-26 21:31:20,102 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:20,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:20,102 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-09-26 21:31:20,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:20,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:20,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:20,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:20,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:22,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:22,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:22,068 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:22,113 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-26 21:31:22,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:22,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:26,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:26,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-09-26 21:31:26,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-26 21:31:26,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-26 21:31:26,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=11719, Unknown=0, NotChecked=0, Total=11990 [2018-09-26 21:31:26,087 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 110 states. [2018-09-26 21:31:30,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:30,117 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-26 21:31:30,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:31:30,117 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 55 [2018-09-26 21:31:30,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:30,118 INFO L225 Difference]: With dead ends: 58 [2018-09-26 21:31:30,118 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:31:30,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=271, Invalid=11719, Unknown=0, NotChecked=0, Total=11990 [2018-09-26 21:31:30,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:31:30,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-26 21:31:30,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-26 21:31:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-26 21:31:30,123 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-26 21:31:30,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:30,123 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-26 21:31:30,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-26 21:31:30,123 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-26 21:31:30,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-26 21:31:30,124 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:30,124 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-09-26 21:31:30,124 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:30,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:30,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-09-26 21:31:30,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:30,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:30,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:30,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:30,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:30,306 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-26 21:31:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:32,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:32,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:32,297 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:32,343 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-26 21:31:32,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:32,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:36,455 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:36,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-09-26 21:31:36,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-26 21:31:36,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-26 21:31:36,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=12156, Unknown=0, NotChecked=0, Total=12432 [2018-09-26 21:31:36,456 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 112 states. [2018-09-26 21:31:40,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:40,393 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-26 21:31:40,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:31:40,394 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 56 [2018-09-26 21:31:40,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:40,395 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:31:40,395 INFO L226 Difference]: Without dead ends: 58 [2018-09-26 21:31:40,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=276, Invalid=12156, Unknown=0, NotChecked=0, Total=12432 [2018-09-26 21:31:40,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-26 21:31:40,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-26 21:31:40,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-26 21:31:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-26 21:31:40,399 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-26 21:31:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:40,399 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-26 21:31:40,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-26 21:31:40,399 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-26 21:31:40,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-26 21:31:40,399 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:40,400 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-09-26 21:31:40,400 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:40,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:40,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-09-26 21:31:40,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:40,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:40,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:40,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:40,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:42,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:42,524 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:42,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:42,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:42,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:46,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:46,806 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-26 21:31:46,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-26 21:31:46,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-26 21:31:46,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=12601, Unknown=0, NotChecked=0, Total=12882 [2018-09-26 21:31:46,807 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 114 states. [2018-09-26 21:31:50,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:50,927 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-26 21:31:50,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:31:50,928 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 57 [2018-09-26 21:31:50,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:50,928 INFO L225 Difference]: With dead ends: 60 [2018-09-26 21:31:50,929 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:31:50,929 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 [2018-09-26 21:31:50,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:31:50,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-26 21:31:50,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-26 21:31:50,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-26 21:31:50,932 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-26 21:31:50,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:50,932 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-26 21:31:50,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-26 21:31:50,933 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-26 21:31:50,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:31:50,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:50,933 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-09-26 21:31:50,933 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:50,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:50,934 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-09-26 21:31:50,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:50,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:50,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:50,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:50,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:53,366 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:53,366 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:53,373 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:53,408 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:53,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:53,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:57,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:57,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-09-26 21:31:57,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-26 21:31:57,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-26 21:31:57,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=13054, Unknown=0, NotChecked=0, Total=13340 [2018-09-26 21:31:57,512 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 116 states. [2018-09-26 21:32:01,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:01,683 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-26 21:32:01,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:32:01,683 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 58 [2018-09-26 21:32:01,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:01,684 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:32:01,684 INFO L226 Difference]: Without dead ends: 60 [2018-09-26 21:32:01,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=286, Invalid=13054, Unknown=0, NotChecked=0, Total=13340 [2018-09-26 21:32:01,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-26 21:32:01,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-26 21:32:01,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-26 21:32:01,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-26 21:32:01,690 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-26 21:32:01,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:01,690 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-26 21:32:01,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-26 21:32:01,690 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-26 21:32:01,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-26 21:32:01,691 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:01,691 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-09-26 21:32:01,691 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:01,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:01,691 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-09-26 21:32:01,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:01,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:01,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:01,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:01,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:04,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:04,237 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:04,237 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:04,244 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:04,293 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-26 21:32:04,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:04,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:08,800 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:08,800 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-09-26 21:32:08,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-26 21:32:08,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-26 21:32:08,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=13515, Unknown=0, NotChecked=0, Total=13806 [2018-09-26 21:32:08,801 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 118 states. [2018-09-26 21:32:13,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:13,142 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-26 21:32:13,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:32:13,143 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 59 [2018-09-26 21:32:13,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:13,144 INFO L225 Difference]: With dead ends: 62 [2018-09-26 21:32:13,144 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:32:13,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=291, Invalid=13515, Unknown=0, NotChecked=0, Total=13806 [2018-09-26 21:32:13,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:32:13,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-26 21:32:13,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-26 21:32:13,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-26 21:32:13,149 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-26 21:32:13,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:13,150 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-26 21:32:13,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-26 21:32:13,150 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-26 21:32:13,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-26 21:32:13,150 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:13,150 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-09-26 21:32:13,151 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:13,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:13,151 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-09-26 21:32:13,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:13,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:13,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:13,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:13,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:13,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:14,540 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-26 21:32:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:16,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:16,340 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:16,350 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:16,385 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:16,386 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:16,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-26 21:32:17,164 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-26 21:32:17,365 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:17,365 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:32:17,370 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:32:17,371 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:32:17 BoogieIcfgContainer [2018-09-26 21:32:17,371 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:32:17,372 INFO L168 Benchmark]: Toolchain (without parser) took 248666.07 ms. Allocated memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: -16.3 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -8.4 MB). Peak memory consumption was 569.4 MB. Max. memory is 7.1 GB. [2018-09-26 21:32:17,373 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:32:17,374 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.03 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:32:17,374 INFO L168 Benchmark]: Boogie Preprocessor took 24.46 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:32:17,374 INFO L168 Benchmark]: RCFGBuilder took 287.00 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:32:17,375 INFO L168 Benchmark]: TraceAbstraction took 248303.66 ms. Allocated memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: -16.3 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -29.5 MB). Peak memory consumption was 548.2 MB. Max. memory is 7.1 GB. [2018-09-26 21:32:17,380 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 0.22 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.03 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.46 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 287.00 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 248303.66 ms. Allocated memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: -16.3 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -29.5 MB). Peak memory consumption was 548.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 18]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 18). Cancelled while BasicCegarLoop was analyzing trace of length 61 with TraceHistMax 58, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 70 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 248.2s OverallTime, 59 OverallIterations, 58 TraceHistogramMax, 80.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 117 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 106860 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 67.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3421 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3421 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32509 ImplicationChecksByTransitivity, 156.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=58, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 58 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 158.8s InterpolantComputationTime, 3536 NumberOfCodeBlocks, 3536 NumberOfCodeBlocksAsserted, 559 NumberOfCheckSat, 3421 ConstructedInterpolants, 0 QuantifiedInterpolants, 1724450 SizeOfPredicates, 0 NumberOfNonLiveVariables, 7011 ConjunctsInSsa, 6840 ConjunctsInUnsatCore, 115 InterpolantComputations, 1 PerfectInterpolantSequences, 0/65018 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-32-17-396.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-32-17-396.csv Completed graceful shutdown