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_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/jain_5.i_2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f-m [2018-10-04 14:29:27,680 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 14:29:27,682 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 14:29:27,701 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 14:29:27,702 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 14:29:27,703 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 14:29:27,704 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 14:29:27,706 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 14:29:27,708 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 14:29:27,709 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 14:29:27,710 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 14:29:27,710 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 14:29:27,711 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 14:29:27,712 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 14:29:27,713 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 14:29:27,714 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 14:29:27,715 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 14:29:27,717 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 14:29:27,719 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 14:29:27,721 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 14:29:27,722 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 14:29:27,723 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 14:29:27,726 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-04 14:29:27,736 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 14:29:27,761 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 14:29:27,761 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 14:29:27,762 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 14:29:27,762 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 14:29:27,763 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 14:29:27,764 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 14:29:27,764 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 14:29:27,764 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 14:29:27,764 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 14:29:27,764 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 14:29:27,766 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 14:29:27,766 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 14:29:27,766 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 14:29:27,766 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 14:29:27,766 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 14:29:27,767 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 14:29:27,767 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 14:29:27,767 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 14:29:27,767 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 14:29:27,768 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 14:29:27,769 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 14:29:27,769 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 14:29:27,769 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 14:29:27,769 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 14:29:27,770 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 14:29:27,770 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 14:29:27,770 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 14:29:27,770 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 14:29:27,770 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 14:29:27,771 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 14:29:27,771 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 14:29:27,830 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 14:29:27,847 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 14:29:27,853 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 14:29:27,855 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 14:29:27,855 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 14:29:27,856 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/jain_5.i_2.bpl [2018-10-04 14:29:27,856 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/jain_5.i_2.bpl' [2018-10-04 14:29:27,912 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 14:29:27,914 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 14:29:27,914 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 14:29:27,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 14:29:27,915 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 14:29:27,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:29:27" (1/1) ... [2018-10-04 14:29:27,949 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:29:27" (1/1) ... [2018-10-04 14:29:27,956 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 14:29:27,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 14:29:27,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 14:29:27,958 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 14:29:27,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:29:27" (1/1) ... [2018-10-04 14:29:27,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:29:27" (1/1) ... [2018-10-04 14:29:27,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:29:27" (1/1) ... [2018-10-04 14:29:27,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:29:27" (1/1) ... [2018-10-04 14:29:27,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:29:27" (1/1) ... [2018-10-04 14:29:27,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:29:27" (1/1) ... [2018-10-04 14:29:27,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:29:27" (1/1) ... [2018-10-04 14:29:27,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 14:29:27,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 14:29:27,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 14:29:27,979 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 14:29:27,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:29:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 14:29:28,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 14:29:28,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 14:29:28,253 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 14:29:28,253 INFO L202 PluginConnector]: Adding new model jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:29:28 BoogieIcfgContainer [2018-10-04 14:29:28,253 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 14:29:28,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 14:29:28,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 14:29:28,258 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 14:29:28,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:29:27" (1/2) ... [2018-10-04 14:29:28,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45b67787 and model type jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 02:29:28, skipping insertion in model container [2018-10-04 14:29:28,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:29:28" (2/2) ... [2018-10-04 14:29:28,261 INFO L112 eAbstractionObserver]: Analyzing ICFG jain_5.i_2.bpl [2018-10-04 14:29:28,271 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 14:29:28,279 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 14:29:28,331 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 14:29:28,332 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 14:29:28,332 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 14:29:28,332 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 14:29:28,332 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 14:29:28,333 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 14:29:28,333 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 14:29:28,333 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 14:29:28,333 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 14:29:28,349 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 14:29:28,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 14:29:28,356 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:28,357 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 14:29:28,358 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:28,365 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:28,365 INFO L82 PathProgramCache]: Analyzing trace with hash 925701, now seen corresponding path program 1 times [2018-10-04 14:29:28,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:28,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:28,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:28,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:29:28,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:28,600 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 14:29:28,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 14:29:28,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 14:29:28,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 14:29:28,619 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:28,621 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2018-10-04 14:29:28,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:28,709 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2018-10-04 14:29:28,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 14:29:28,712 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-10-04 14:29:28,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:28,723 INFO L225 Difference]: With dead ends: 12 [2018-10-04 14:29:28,724 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 14:29:28,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 2 [2018-10-04 14:29:28,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 14:29:28,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2018-10-04 14:29:28,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 14:29:28,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 14:29:28,774 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-04 14:29:28,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:28,775 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 14:29:28,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 14:29:28,775 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 14:29:28,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 14:29:28,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:28,776 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-04 14:29:28,777 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:28,777 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:28,777 INFO L82 PathProgramCache]: Analyzing trace with hash 889531649, now seen corresponding path program 1 times [2018-10-04 14:29:28,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:28,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:28,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:28,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:29:28,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:28,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:28,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:28,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:29:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:29,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:29,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:29,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-10-04 14:29:29,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 14:29:29,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 14:29:29,271 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:29,271 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 10 states. [2018-10-04 14:29:29,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:29,406 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-04 14:29:29,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 14:29:29,406 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-10-04 14:29:29,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:29,407 INFO L225 Difference]: With dead ends: 12 [2018-10-04 14:29:29,407 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 14:29:29,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 7 [2018-10-04 14:29:29,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 14:29:29,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-10-04 14:29:29,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 14:29:29,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 14:29:29,417 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-04 14:29:29,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:29,418 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 14:29:29,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 14:29:29,418 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 14:29:29,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 14:29:29,419 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:29,420 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-04 14:29:29,420 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:29,420 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:29,420 INFO L82 PathProgramCache]: Analyzing trace with hash 141355773, now seen corresponding path program 2 times [2018-10-04 14:29:29,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:29,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:29,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:29,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:29:29,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:29,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:29,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:29,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:29,807 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:29:29,831 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:29:29,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:29,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:30,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:30,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-10-04 14:29:30,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 14:29:30,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 14:29:30,028 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:30,029 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 12 states. [2018-10-04 14:29:30,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:30,303 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-04 14:29:30,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 14:29:30,304 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 8 [2018-10-04 14:29:30,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:30,304 INFO L225 Difference]: With dead ends: 14 [2018-10-04 14:29:30,305 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 14:29:30,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 8 [2018-10-04 14:29:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 14:29:30,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-10-04 14:29:30,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 14:29:30,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 14:29:30,310 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-04 14:29:30,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:30,311 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 14:29:30,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 14:29:30,311 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 14:29:30,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 14:29:30,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:30,312 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-04 14:29:30,312 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:30,312 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:30,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1596122631, now seen corresponding path program 3 times [2018-10-04 14:29:30,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:30,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:30,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:30,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:30,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:30,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:30,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:30,494 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:29:30,508 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 14:29:30,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:30,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:30,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:30,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-10-04 14:29:30,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 14:29:30,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 14:29:30,648 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:30,648 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 14 states. [2018-10-04 14:29:31,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:31,169 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-04 14:29:31,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 14:29:31,173 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-10-04 14:29:31,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:31,174 INFO L225 Difference]: With dead ends: 16 [2018-10-04 14:29:31,174 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 14:29:31,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 11 [2018-10-04 14:29:31,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 14:29:31,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2018-10-04 14:29:31,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 14:29:31,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 14:29:31,179 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-04 14:29:31,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:31,180 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 14:29:31,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 14:29:31,180 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 14:29:31,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 14:29:31,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:31,181 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-04 14:29:31,181 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:31,181 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:31,181 INFO L82 PathProgramCache]: Analyzing trace with hash -570590731, now seen corresponding path program 4 times [2018-10-04 14:29:31,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:31,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:31,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:31,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:31,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:31,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:31,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:31,388 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:29:31,411 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:29:31,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:31,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:31,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:31,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-10-04 14:29:31,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 14:29:31,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 14:29:31,584 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:31,584 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 16 states. [2018-10-04 14:29:31,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:31,772 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-04 14:29:31,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 14:29:31,772 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2018-10-04 14:29:31,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:31,773 INFO L225 Difference]: With dead ends: 18 [2018-10-04 14:29:31,773 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 14:29:31,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 14 [2018-10-04 14:29:31,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 14:29:31,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2018-10-04 14:29:31,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 14:29:31,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 14:29:31,780 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-04 14:29:31,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:31,780 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 14:29:31,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 14:29:31,780 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 14:29:31,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 14:29:31,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:31,781 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-04 14:29:31,782 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:31,782 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:31,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1418054385, now seen corresponding path program 5 times [2018-10-04 14:29:31,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:31,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:31,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:31,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:31,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:32,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:32,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:32,027 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:29:46,711 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 14:29:46,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:46,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:47,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:47,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-10-04 14:29:47,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 14:29:47,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 14:29:47,007 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:47,007 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 18 states. [2018-10-04 14:29:47,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:47,528 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-04 14:29:47,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 14:29:47,528 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2018-10-04 14:29:47,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:47,529 INFO L225 Difference]: With dead ends: 20 [2018-10-04 14:29:47,529 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 14:29:47,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 17 [2018-10-04 14:29:47,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 14:29:47,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-04 14:29:47,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 14:29:47,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 14:29:47,538 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-04 14:29:47,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:47,538 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 14:29:47,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 14:29:47,538 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 14:29:47,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 14:29:47,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:47,539 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-04 14:29:47,540 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:47,540 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:47,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1245564141, now seen corresponding path program 6 times [2018-10-04 14:29:47,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:47,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:47,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:47,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:47,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:47,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:47,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:47,755 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:30:00,094 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 14:30:00,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:00,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:00,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:00,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-10-04 14:30:00,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 14:30:00,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 14:30:00,292 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:00,292 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 20 states. [2018-10-04 14:30:00,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:00,618 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-04 14:30:00,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 14:30:00,618 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 16 [2018-10-04 14:30:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:00,619 INFO L225 Difference]: With dead ends: 22 [2018-10-04 14:30:00,619 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 14:30:00,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 20 [2018-10-04 14:30:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 14:30:00,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2018-10-04 14:30:00,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 14:30:00,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 14:30:00,626 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-04 14:30:00,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:00,626 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 14:30:00,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 14:30:00,626 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 14:30:00,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 14:30:00,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:00,627 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-04 14:30:00,627 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:00,627 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:00,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1308803095, now seen corresponding path program 7 times [2018-10-04 14:30:00,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:00,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:00,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:00,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:00,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:00,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:00,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:00,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:00,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:30:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:00,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:01,082 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:01,104 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:01,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-10-04 14:30:01,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 14:30:01,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 14:30:01,105 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:01,105 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 22 states. [2018-10-04 14:30:01,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:01,947 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-04 14:30:01,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 14:30:01,948 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 18 [2018-10-04 14:30:01,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:01,948 INFO L225 Difference]: With dead ends: 24 [2018-10-04 14:30:01,949 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 14:30:01,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 23 [2018-10-04 14:30:01,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 14:30:01,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-10-04 14:30:01,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 14:30:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 14:30:01,955 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-04 14:30:01,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:01,955 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 14:30:01,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 14:30:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 14:30:01,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 14:30:01,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:01,957 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-04 14:30:01,957 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:01,957 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:01,957 INFO L82 PathProgramCache]: Analyzing trace with hash 665576421, now seen corresponding path program 8 times [2018-10-04 14:30:01,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:01,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:01,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:01,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:30:01,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:02,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:02,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:02,818 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:30:02,842 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:30:02,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:02,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:03,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:03,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2018-10-04 14:30:03,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 14:30:03,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 14:30:03,278 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:03,279 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 24 states. [2018-10-04 14:30:04,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:04,138 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-04 14:30:04,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 14:30:04,138 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 20 [2018-10-04 14:30:04,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:04,140 INFO L225 Difference]: With dead ends: 26 [2018-10-04 14:30:04,140 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 14:30:04,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime 26 [2018-10-04 14:30:04,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 14:30:04,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-10-04 14:30:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 14:30:04,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 14:30:04,147 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-04 14:30:04,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:04,147 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 14:30:04,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 14:30:04,148 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 14:30:04,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 14:30:04,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:04,148 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-04 14:30:04,149 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:04,149 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:04,149 INFO L82 PathProgramCache]: Analyzing trace with hash -331253535, now seen corresponding path program 9 times [2018-10-04 14:30:04,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:04,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:04,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:04,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:04,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:04,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:04,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:04,422 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:30:09,224 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 14:30:09,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:09,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:09,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:09,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2018-10-04 14:30:09,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 14:30:09,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 14:30:09,442 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:09,442 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 26 states. [2018-10-04 14:30:09,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:09,859 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-04 14:30:09,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 14:30:09,860 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 22 [2018-10-04 14:30:09,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:09,861 INFO L225 Difference]: With dead ends: 28 [2018-10-04 14:30:09,861 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 14:30:09,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 29 [2018-10-04 14:30:09,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 14:30:09,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-10-04 14:30:09,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 14:30:09,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 14:30:09,869 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-04 14:30:09,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:09,869 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 14:30:09,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 14:30:09,869 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 14:30:09,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 14:30:09,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:09,870 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-04 14:30:09,870 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:09,870 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:09,871 INFO L82 PathProgramCache]: Analyzing trace with hash -507134243, now seen corresponding path program 10 times [2018-10-04 14:30:09,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:09,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:09,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:09,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:09,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:10,297 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:10,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:10,298 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:10,305 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:30:10,334 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:30:10,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:10,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:10,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:10,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2018-10-04 14:30:10,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 14:30:10,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 14:30:10,763 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:10,763 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 28 states. [2018-10-04 14:30:11,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:11,423 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-04 14:30:11,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 14:30:11,424 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 24 [2018-10-04 14:30:11,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:11,424 INFO L225 Difference]: With dead ends: 30 [2018-10-04 14:30:11,425 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 14:30:11,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 32 [2018-10-04 14:30:11,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 14:30:11,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-10-04 14:30:11,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 14:30:11,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 14:30:11,433 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-04 14:30:11,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:11,434 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 14:30:11,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 14:30:11,434 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 14:30:11,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 14:30:11,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:11,435 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-04 14:30:11,435 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:11,435 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:11,435 INFO L82 PathProgramCache]: Analyzing trace with hash -2024770087, now seen corresponding path program 11 times [2018-10-04 14:30:11,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:11,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:11,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:11,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:11,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:11,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:11,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:11,701 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:32:07,981 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 14:32:07,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:10,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:11,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:11,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2018-10-04 14:32:11,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 14:32:11,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 14:32:11,220 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:11,220 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 30 states. [2018-10-04 14:32:12,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:12,050 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-04 14:32:12,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 14:32:12,051 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 26 [2018-10-04 14:32:12,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:12,051 INFO L225 Difference]: With dead ends: 32 [2018-10-04 14:32:12,051 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 14:32:12,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 35 [2018-10-04 14:32:12,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 14:32:12,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-10-04 14:32:12,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 14:32:12,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 14:32:12,059 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-04 14:32:12,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:12,059 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 14:32:12,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 14:32:12,059 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 14:32:12,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 14:32:12,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:12,060 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-04 14:32:12,061 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:12,061 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:12,061 INFO L82 PathProgramCache]: Analyzing trace with hash -183935531, now seen corresponding path program 12 times [2018-10-04 14:32:12,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:12,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:12,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:12,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:12,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:13,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:13,095 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:32:13,107 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:33:24,458 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 14:33:24,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:26,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:27,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:27,409 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-10-04 14:33:27,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 14:33:27,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 14:33:27,410 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:27,410 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 32 states. [2018-10-04 14:33:28,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:28,309 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-04 14:33:28,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 14:33:28,316 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 28 [2018-10-04 14:33:28,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:28,316 INFO L225 Difference]: With dead ends: 34 [2018-10-04 14:33:28,317 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 14:33:28,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.0s impTime 38 [2018-10-04 14:33:28,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 14:33:28,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-10-04 14:33:28,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 14:33:28,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 14:33:28,326 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-04 14:33:28,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:28,327 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 14:33:28,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 14:33:28,327 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 14:33:28,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 14:33:28,328 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:28,328 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-04 14:33:28,328 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:28,328 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:28,328 INFO L82 PathProgramCache]: Analyzing trace with hash -668453167, now seen corresponding path program 13 times [2018-10-04 14:33:28,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:28,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:28,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:28,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:28,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:28,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:28,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:28,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:28,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:29,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:29,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2018-10-04 14:33:29,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 14:33:29,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 14:33:29,329 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:29,329 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 34 states. [2018-10-04 14:33:30,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:30,306 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-04 14:33:30,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 14:33:30,307 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 30 [2018-10-04 14:33:30,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:30,308 INFO L225 Difference]: With dead ends: 36 [2018-10-04 14:33:30,308 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 14:33:30,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime 41 [2018-10-04 14:33:30,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 14:33:30,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-10-04 14:33:30,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 14:33:30,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 14:33:30,318 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-04 14:33:30,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:30,319 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 14:33:30,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 14:33:30,319 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 14:33:30,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 14:33:30,320 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:30,320 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-04 14:33:30,320 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:30,320 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:30,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1861533901, now seen corresponding path program 14 times [2018-10-04 14:33:30,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:30,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:30,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:30,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:30,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:30,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:30,748 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:30,759 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:33:30,787 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:33:30,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:30,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:31,104 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:31,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2018-10-04 14:33:31,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 14:33:31,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 14:33:31,105 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:31,105 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 36 states. [2018-10-04 14:33:31,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:31,956 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-04 14:33:31,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 14:33:31,956 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 32 [2018-10-04 14:33:31,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:31,957 INFO L225 Difference]: With dead ends: 38 [2018-10-04 14:33:31,957 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 14:33:31,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime 44 [2018-10-04 14:33:31,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 14:33:31,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-10-04 14:33:31,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 14:33:31,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 14:33:31,966 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-04 14:33:31,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:31,966 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 14:33:31,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 14:33:31,967 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 14:33:31,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 14:33:31,967 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:31,967 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-04 14:33:31,968 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:31,968 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:31,968 INFO L82 PathProgramCache]: Analyzing trace with hash -2067350583, now seen corresponding path program 15 times [2018-10-04 14:33:31,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:31,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:31,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:31,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:31,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:32,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:32,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:32,785 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown