java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_compound_oct_cong.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/gr2006.c.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 17:43:22,669 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 17:43:22,672 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 17:43:22,688 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-12-03 17:43:22,730 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_compound_oct_cong.epf [2018-12-03 17:43:22,752 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 17:43:22,753 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 17:43:22,753 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 17:43:22,757 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 17:43:22,757 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 17:43:22,757 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 17:43:22,757 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 17:43:22,758 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 17:43:22,758 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 17:43:22,758 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 17:43:22,758 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 17:43:22,758 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 17:43:22,758 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 17:43:22,759 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 17:43:22,759 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 17:43:22,760 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 17:43:22,761 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 17:43:22,761 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 17:43:22,761 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 17:43:22,761 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 17:43:22,761 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 17:43:22,762 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 17:43:22,762 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 17:43:22,762 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 17:43:22,762 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 17:43:22,762 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 17:43:22,763 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 17:43:22,764 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 17:43:22,764 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 17:43:22,765 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 17:43:22,765 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 17:43:22,765 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 17:43:22,765 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 17:43:22,765 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 17:43:22,766 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 17:43:22,766 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 17:43:22,766 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 17:43:22,766 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 17:43:22,766 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 17:43:22,814 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 17:43:22,829 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 17:43:22,838 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 17:43:22,840 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 17:43:22,840 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 17:43:22,842 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/gr2006.c.i_4.bpl [2018-12-03 17:43:22,842 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/gr2006.c.i_4.bpl' [2018-12-03 17:43:22,886 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 17:43:22,888 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 17:43:22,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 17:43:22,889 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 17:43:22,889 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 17:43:22,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "gr2006.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:43:22" (1/1) ... [2018-12-03 17:43:22,918 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "gr2006.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:43:22" (1/1) ... [2018-12-03 17:43:22,927 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 17:43:22,928 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 17:43:22,928 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 17:43:22,928 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 17:43:22,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "gr2006.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:43:22" (1/1) ... [2018-12-03 17:43:22,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "gr2006.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:43:22" (1/1) ... [2018-12-03 17:43:22,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "gr2006.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:43:22" (1/1) ... [2018-12-03 17:43:22,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "gr2006.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:43:22" (1/1) ... [2018-12-03 17:43:22,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "gr2006.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:43:22" (1/1) ... [2018-12-03 17:43:22,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "gr2006.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:43:22" (1/1) ... [2018-12-03 17:43:22,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "gr2006.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:43:22" (1/1) ... [2018-12-03 17:43:22,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 17:43:22,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 17:43:22,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 17:43:22,952 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 17:43:22,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "gr2006.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:43:22" (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 [2018-12-03 17:43:23,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 17:43:23,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 17:43:23,274 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 17:43:23,274 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-03 17:43:23,275 INFO L202 PluginConnector]: Adding new model gr2006.c.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:43:23 BoogieIcfgContainer [2018-12-03 17:43:23,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 17:43:23,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 17:43:23,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 17:43:23,279 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 17:43:23,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gr2006.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:43:22" (1/2) ... [2018-12-03 17:43:23,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d202b0 and model type gr2006.c.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 05:43:23, skipping insertion in model container [2018-12-03 17:43:23,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gr2006.c.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:43:23" (2/2) ... [2018-12-03 17:43:23,283 INFO L112 eAbstractionObserver]: Analyzing ICFG gr2006.c.i_4.bpl [2018-12-03 17:43:23,293 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 17:43:23,301 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 17:43:23,320 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 17:43:23,354 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 17:43:23,355 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 17:43:23,355 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 17:43:23,355 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 17:43:23,355 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 17:43:23,355 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 17:43:23,356 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 17:43:23,356 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 17:43:23,371 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2018-12-03 17:43:23,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-03 17:43:23,378 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:23,379 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-03 17:43:23,382 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:23,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:23,389 INFO L82 PathProgramCache]: Analyzing trace with hash 28694887, now seen corresponding path program 1 times [2018-12-03 17:43:23,391 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:23,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:23,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:43:23,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:23,443 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:43:23,578 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 17:43:23,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-03 17:43:23,579 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 17:43:23,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 17:43:23,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 17:43:23,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-03 17:43:23,606 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 4 states. [2018-12-03 17:43:23,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:23,831 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-12-03 17:43:23,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 17:43:23,833 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-12-03 17:43:23,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:23,844 INFO L225 Difference]: With dead ends: 14 [2018-12-03 17:43:23,845 INFO L226 Difference]: Without dead ends: 10 [2018-12-03 17:43:23,848 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-03 17:43:23,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-12-03 17:43:23,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-12-03 17:43:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-12-03 17:43:23,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-12-03 17:43:23,886 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 5 [2018-12-03 17:43:23,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:23,887 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-12-03 17:43:23,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 17:43:23,887 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-12-03 17:43:23,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-03 17:43:23,887 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:23,888 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-03 17:43:23,888 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:23,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:23,889 INFO L82 PathProgramCache]: Analyzing trace with hash 28696809, now seen corresponding path program 1 times [2018-12-03 17:43:23,889 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:23,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:23,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:43:23,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:23,890 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:23,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:43:23,954 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 17:43:23,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 17:43:23,954 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 17:43:23,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 17:43:23,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 17:43:23,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 17:43:23,957 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 3 states. [2018-12-03 17:43:24,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:24,009 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2018-12-03 17:43:24,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 17:43:24,010 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-12-03 17:43:24,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:24,011 INFO L225 Difference]: With dead ends: 22 [2018-12-03 17:43:24,011 INFO L226 Difference]: Without dead ends: 13 [2018-12-03 17:43:24,012 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 17:43:24,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-03 17:43:24,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2018-12-03 17:43:24,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-12-03 17:43:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-12-03 17:43:24,017 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 5 [2018-12-03 17:43:24,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:24,018 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-12-03 17:43:24,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 17:43:24,018 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-12-03 17:43:24,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-03 17:43:24,019 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:24,019 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2018-12-03 17:43:24,019 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:24,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:24,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1872158041, now seen corresponding path program 1 times [2018-12-03 17:43:24,020 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:24,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:24,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:43:24,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:24,021 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:24,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-03 17:43:24,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:24,085 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:24,086 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 12 with the following transitions: [2018-12-03 17:43:24,088 INFO L205 CegarAbsIntRunner]: [0], [2], [6], [8], [12], [14], [16] [2018-12-03 17:43:24,145 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 17:43:24,145 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 17:43:24,584 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 17:43:24,586 INFO L272 AbstractInterpreter]: Visited 7 different actions 58 times. Merged at 6 different actions 33 times. Widened at 4 different actions 17 times. Found 7 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-03 17:43:24,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:24,603 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 17:43:24,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:24,603 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2018-12-03 17:43:24,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:43:24,614 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:43:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:24,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-03 17:43:24,656 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-03 17:43:24,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:24,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2018-12-03 17:43:24,754 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:24,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 17:43:24,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 17:43:24,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-03 17:43:24,756 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 4 states. [2018-12-03 17:43:24,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:24,817 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2018-12-03 17:43:24,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 17:43:24,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-12-03 17:43:24,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:24,819 INFO L225 Difference]: With dead ends: 25 [2018-12-03 17:43:24,819 INFO L226 Difference]: Without dead ends: 16 [2018-12-03 17:43:24,819 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-03 17:43:24,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-03 17:43:24,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2018-12-03 17:43:24,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-03 17:43:24,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2018-12-03 17:43:24,825 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2018-12-03 17:43:24,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:24,826 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2018-12-03 17:43:24,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 17:43:24,826 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2018-12-03 17:43:24,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-03 17:43:24,827 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:24,827 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1] [2018-12-03 17:43:24,827 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:24,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:24,828 INFO L82 PathProgramCache]: Analyzing trace with hash 306486099, now seen corresponding path program 2 times [2018-12-03 17:43:24,828 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:24,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:24,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:43:24,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:24,830 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:24,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-03 17:43:24,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:24,954 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:24,954 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:24,954 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:24,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:24,954 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2018-12-03 17:43:24,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:43:24,966 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:43:24,987 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-03 17:43:24,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:43:24,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-03 17:43:24,994 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-03 17:43:25,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:25,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2018-12-03 17:43:25,256 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:25,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 17:43:25,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 17:43:25,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-03 17:43:25,258 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2018-12-03 17:43:25,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:25,322 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2018-12-03 17:43:25,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 17:43:25,323 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-12-03 17:43:25,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:25,324 INFO L225 Difference]: With dead ends: 28 [2018-12-03 17:43:25,324 INFO L226 Difference]: Without dead ends: 19 [2018-12-03 17:43:25,325 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-03 17:43:25,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-03 17:43:25,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2018-12-03 17:43:25,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-03 17:43:25,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-12-03 17:43:25,331 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2018-12-03 17:43:25,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:25,332 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-12-03 17:43:25,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 17:43:25,332 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-12-03 17:43:25,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-03 17:43:25,333 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:25,333 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 1, 1, 1] [2018-12-03 17:43:25,333 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:25,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:25,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1251716313, now seen corresponding path program 3 times [2018-12-03 17:43:25,333 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:25,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:25,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:43:25,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:25,335 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-03 17:43:25,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:25,435 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:25,435 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:25,435 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:25,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:25,436 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2018-12-03 17:43:25,445 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:43:25,446 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:43:25,470 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:43:25,470 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:43:25,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-03 17:43:25,481 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-03 17:43:25,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:25,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-12-03 17:43:25,706 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:25,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-03 17:43:25,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-03 17:43:25,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-03 17:43:25,708 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 6 states. [2018-12-03 17:43:25,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:25,797 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2018-12-03 17:43:25,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-03 17:43:25,797 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-12-03 17:43:25,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:25,799 INFO L225 Difference]: With dead ends: 31 [2018-12-03 17:43:25,799 INFO L226 Difference]: Without dead ends: 22 [2018-12-03 17:43:25,800 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-03 17:43:25,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-03 17:43:25,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-12-03 17:43:25,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-03 17:43:25,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-12-03 17:43:25,806 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2018-12-03 17:43:25,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:25,806 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-12-03 17:43:25,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-03 17:43:25,806 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-12-03 17:43:25,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-03 17:43:25,807 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:25,807 INFO L402 BasicCegarLoop]: trace histogram [6, 5, 4, 2, 1, 1, 1] [2018-12-03 17:43:25,808 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:25,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:25,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1653237037, now seen corresponding path program 4 times [2018-12-03 17:43:25,808 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:25,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:25,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:43:25,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:25,810 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-03 17:43:25,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:25,887 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:25,888 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:25,888 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:25,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:25,888 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2018-12-03 17:43:25,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:43:25,898 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:43:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:25,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-03 17:43:25,918 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-03 17:43:26,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:26,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2018-12-03 17:43:26,284 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:26,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-03 17:43:26,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-03 17:43:26,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-03 17:43:26,286 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2018-12-03 17:43:26,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:26,442 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2018-12-03 17:43:26,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-03 17:43:26,443 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-12-03 17:43:26,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:26,445 INFO L225 Difference]: With dead ends: 34 [2018-12-03 17:43:26,445 INFO L226 Difference]: Without dead ends: 25 [2018-12-03 17:43:26,446 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-03 17:43:26,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-03 17:43:26,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2018-12-03 17:43:26,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-03 17:43:26,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-12-03 17:43:26,453 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 20 [2018-12-03 17:43:26,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:26,453 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-12-03 17:43:26,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-03 17:43:26,453 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-12-03 17:43:26,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-03 17:43:26,454 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:26,454 INFO L402 BasicCegarLoop]: trace histogram [7, 6, 5, 2, 1, 1, 1] [2018-12-03 17:43:26,454 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:26,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:26,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1873206361, now seen corresponding path program 5 times [2018-12-03 17:43:26,455 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:26,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:26,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:43:26,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:26,456 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-03 17:43:26,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:26,547 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:26,548 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:26,548 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:26,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:26,548 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2018-12-03 17:43:26,561 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:43:26,561 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:43:26,579 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-03 17:43:26,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:43:26,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 17:43:26,639 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 17:43:26,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:26,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2018-12-03 17:43:26,693 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:26,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-03 17:43:26,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-03 17:43:26,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-12-03 17:43:26,695 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 11 states. [2018-12-03 17:43:26,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:26,903 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2018-12-03 17:43:26,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-03 17:43:26,904 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2018-12-03 17:43:26,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:26,906 INFO L225 Difference]: With dead ends: 44 [2018-12-03 17:43:26,906 INFO L226 Difference]: Without dead ends: 35 [2018-12-03 17:43:26,907 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2018-12-03 17:43:26,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-03 17:43:26,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-12-03 17:43:26,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-03 17:43:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2018-12-03 17:43:26,985 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 23 [2018-12-03 17:43:26,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:26,986 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2018-12-03 17:43:26,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-03 17:43:26,986 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2018-12-03 17:43:26,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-03 17:43:26,987 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:26,987 INFO L402 BasicCegarLoop]: trace histogram [9, 8, 6, 3, 1, 1, 1] [2018-12-03 17:43:26,987 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:26,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:26,988 INFO L82 PathProgramCache]: Analyzing trace with hash 270037545, now seen corresponding path program 6 times [2018-12-03 17:43:26,988 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:26,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:26,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:43:26,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:26,989 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 46 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-03 17:43:27,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:27,160 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:27,160 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:27,161 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:27,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:27,161 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2018-12-03 17:43:27,171 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:43:27,171 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:43:27,205 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:43:27,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:43:27,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 46 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-03 17:43:27,215 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 46 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-03 17:43:27,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:27,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2018-12-03 17:43:27,661 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:27,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-03 17:43:27,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-03 17:43:27,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-12-03 17:43:27,662 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 9 states. [2018-12-03 17:43:27,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:27,719 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2018-12-03 17:43:27,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-03 17:43:27,720 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2018-12-03 17:43:27,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:27,720 INFO L225 Difference]: With dead ends: 46 [2018-12-03 17:43:27,720 INFO L226 Difference]: Without dead ends: 34 [2018-12-03 17:43:27,721 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-12-03 17:43:27,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-03 17:43:27,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-12-03 17:43:27,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-03 17:43:27,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2018-12-03 17:43:27,729 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2018-12-03 17:43:27,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:27,729 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2018-12-03 17:43:27,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-03 17:43:27,730 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2018-12-03 17:43:27,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-12-03 17:43:27,731 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:27,731 INFO L402 BasicCegarLoop]: trace histogram [10, 9, 7, 3, 1, 1, 1] [2018-12-03 17:43:27,731 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:27,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:27,731 INFO L82 PathProgramCache]: Analyzing trace with hash -41969707, now seen corresponding path program 7 times [2018-12-03 17:43:27,732 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:27,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:27,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:43:27,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:27,733 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 53 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-03 17:43:27,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:27,868 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:27,868 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:27,868 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:27,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:27,868 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2018-12-03 17:43:27,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:43:27,878 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:43:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:27,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:27,902 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 53 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-03 17:43:27,902 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:28,069 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 53 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-03 17:43:28,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:28,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2018-12-03 17:43:28,088 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:28,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-03 17:43:28,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-03 17:43:28,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-12-03 17:43:28,089 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 10 states. [2018-12-03 17:43:28,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:28,175 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2018-12-03 17:43:28,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-03 17:43:28,175 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2018-12-03 17:43:28,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:28,176 INFO L225 Difference]: With dead ends: 49 [2018-12-03 17:43:28,177 INFO L226 Difference]: Without dead ends: 37 [2018-12-03 17:43:28,178 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-12-03 17:43:28,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-03 17:43:28,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2018-12-03 17:43:28,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-03 17:43:28,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2018-12-03 17:43:28,187 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 32 [2018-12-03 17:43:28,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:28,187 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2018-12-03 17:43:28,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-03 17:43:28,188 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2018-12-03 17:43:28,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-12-03 17:43:28,189 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:28,189 INFO L402 BasicCegarLoop]: trace histogram [11, 10, 8, 3, 1, 1, 1] [2018-12-03 17:43:28,189 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:28,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:28,189 INFO L82 PathProgramCache]: Analyzing trace with hash -740785495, now seen corresponding path program 8 times [2018-12-03 17:43:28,190 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:28,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:28,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:43:28,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:28,191 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 60 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-03 17:43:28,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:28,343 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:28,343 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:28,344 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:28,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:28,344 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2018-12-03 17:43:28,357 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:43:28,357 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:43:28,387 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-03 17:43:28,388 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:43:28,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 112 proven. 17 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-12-03 17:43:28,463 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 112 proven. 17 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-12-03 17:43:28,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:28,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2018-12-03 17:43:28,551 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:28,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-03 17:43:28,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-03 17:43:28,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2018-12-03 17:43:28,552 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 15 states. [2018-12-03 17:43:28,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:28,945 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2018-12-03 17:43:28,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-03 17:43:28,954 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2018-12-03 17:43:28,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:28,955 INFO L225 Difference]: With dead ends: 62 [2018-12-03 17:43:28,955 INFO L226 Difference]: Without dead ends: 50 [2018-12-03 17:43:28,956 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2018-12-03 17:43:28,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-12-03 17:43:28,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2018-12-03 17:43:28,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-03 17:43:28,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2018-12-03 17:43:28,973 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 35 [2018-12-03 17:43:28,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:28,974 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2018-12-03 17:43:28,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-03 17:43:28,974 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2018-12-03 17:43:28,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-03 17:43:28,975 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:28,975 INFO L402 BasicCegarLoop]: trace histogram [13, 12, 9, 4, 1, 1, 1] [2018-12-03 17:43:28,977 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:28,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:28,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1379041817, now seen corresponding path program 9 times [2018-12-03 17:43:28,978 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:28,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:28,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:43:28,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:28,980 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 96 proven. 126 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 17:43:29,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:29,356 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:29,356 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:29,356 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:29,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:29,356 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2018-12-03 17:43:29,365 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:43:29,365 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:43:29,379 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:43:29,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:43:29,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 96 proven. 126 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 17:43:29,394 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 96 proven. 126 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 17:43:29,925 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:29,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2018-12-03 17:43:29,926 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:29,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-03 17:43:29,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-03 17:43:29,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-12-03 17:43:29,931 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 12 states. [2018-12-03 17:43:30,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:30,092 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2018-12-03 17:43:30,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-03 17:43:30,092 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2018-12-03 17:43:30,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:30,092 INFO L225 Difference]: With dead ends: 61 [2018-12-03 17:43:30,093 INFO L226 Difference]: Without dead ends: 46 [2018-12-03 17:43:30,093 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-12-03 17:43:30,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-12-03 17:43:30,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2018-12-03 17:43:30,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-12-03 17:43:30,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2018-12-03 17:43:30,103 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 41 [2018-12-03 17:43:30,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:30,104 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2018-12-03 17:43:30,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-03 17:43:30,104 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2018-12-03 17:43:30,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-12-03 17:43:30,105 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:30,105 INFO L402 BasicCegarLoop]: trace histogram [14, 13, 10, 4, 1, 1, 1] [2018-12-03 17:43:30,105 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:30,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:30,105 INFO L82 PathProgramCache]: Analyzing trace with hash -391282285, now seen corresponding path program 10 times [2018-12-03 17:43:30,106 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:30,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:30,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:43:30,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:30,107 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:30,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 106 proven. 155 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 17:43:30,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:30,476 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:30,476 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:30,476 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:30,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:30,477 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2018-12-03 17:43:30,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:43:30,486 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:43:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:30,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 106 proven. 155 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 17:43:30,526 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 106 proven. 155 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 17:43:30,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:30,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2018-12-03 17:43:30,978 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:30,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-03 17:43:30,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-03 17:43:30,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-12-03 17:43:30,980 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 13 states. [2018-12-03 17:43:31,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:31,049 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2018-12-03 17:43:31,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-03 17:43:31,050 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2018-12-03 17:43:31,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:31,051 INFO L225 Difference]: With dead ends: 64 [2018-12-03 17:43:31,051 INFO L226 Difference]: Without dead ends: 49 [2018-12-03 17:43:31,053 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-12-03 17:43:31,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-12-03 17:43:31,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2018-12-03 17:43:31,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-03 17:43:31,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2018-12-03 17:43:31,065 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 44 [2018-12-03 17:43:31,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:31,065 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2018-12-03 17:43:31,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-03 17:43:31,066 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2018-12-03 17:43:31,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-12-03 17:43:31,067 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:31,067 INFO L402 BasicCegarLoop]: trace histogram [15, 14, 11, 4, 1, 1, 1] [2018-12-03 17:43:31,067 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:31,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:31,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1131990631, now seen corresponding path program 11 times [2018-12-03 17:43:31,068 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:31,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:31,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:43:31,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:31,069 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 116 proven. 187 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 17:43:31,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:31,231 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:31,232 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:31,232 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:31,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:31,232 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2018-12-03 17:43:31,242 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:43:31,242 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:43:31,264 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-12-03 17:43:31,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:43:31,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 209 proven. 34 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-12-03 17:43:31,354 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 209 proven. 34 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-12-03 17:43:31,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:31,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 19 [2018-12-03 17:43:31,480 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:31,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-03 17:43:31,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-03 17:43:31,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2018-12-03 17:43:31,481 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 19 states. [2018-12-03 17:43:31,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:31,786 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2018-12-03 17:43:31,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-03 17:43:31,788 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2018-12-03 17:43:31,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:31,789 INFO L225 Difference]: With dead ends: 80 [2018-12-03 17:43:31,789 INFO L226 Difference]: Without dead ends: 65 [2018-12-03 17:43:31,791 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 80 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=370, Invalid=820, Unknown=0, NotChecked=0, Total=1190 [2018-12-03 17:43:31,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-12-03 17:43:31,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 54. [2018-12-03 17:43:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-12-03 17:43:31,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-12-03 17:43:31,819 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 47 [2018-12-03 17:43:31,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:31,819 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-12-03 17:43:31,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-03 17:43:31,820 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-12-03 17:43:31,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-03 17:43:31,823 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:31,823 INFO L402 BasicCegarLoop]: trace histogram [17, 16, 12, 5, 1, 1, 1] [2018-12-03 17:43:31,824 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:31,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:31,824 INFO L82 PathProgramCache]: Analyzing trace with hash -969108631, now seen corresponding path program 12 times [2018-12-03 17:43:31,825 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:31,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:31,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:43:31,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:31,826 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 164 proven. 222 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-03 17:43:32,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:32,102 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:32,102 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:32,102 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:32,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:32,102 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2018-12-03 17:43:32,113 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:43:32,113 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:43:32,146 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:43:32,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:43:32,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 164 proven. 222 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-03 17:43:32,158 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 164 proven. 222 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-03 17:43:32,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:32,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2018-12-03 17:43:32,550 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:32,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-03 17:43:32,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-03 17:43:32,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-12-03 17:43:32,552 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 15 states. [2018-12-03 17:43:32,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:32,670 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2018-12-03 17:43:32,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-03 17:43:32,670 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2018-12-03 17:43:32,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:32,671 INFO L225 Difference]: With dead ends: 76 [2018-12-03 17:43:32,671 INFO L226 Difference]: Without dead ends: 58 [2018-12-03 17:43:32,672 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-12-03 17:43:32,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-03 17:43:32,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2018-12-03 17:43:32,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-03 17:43:32,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2018-12-03 17:43:32,686 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 53 [2018-12-03 17:43:32,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:32,687 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2018-12-03 17:43:32,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-03 17:43:32,687 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2018-12-03 17:43:32,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-03 17:43:32,688 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:32,688 INFO L402 BasicCegarLoop]: trace histogram [18, 17, 13, 5, 1, 1, 1] [2018-12-03 17:43:32,688 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:32,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:32,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2050520341, now seen corresponding path program 13 times [2018-12-03 17:43:32,689 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:32,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:32,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:43:32,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:32,690 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:32,949 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 177 proven. 260 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-03 17:43:32,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:32,949 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:32,949 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:32,950 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:32,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:32,950 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2018-12-03 17:43:32,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:43:32,967 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:43:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:33,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 177 proven. 260 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-03 17:43:33,014 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 177 proven. 260 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-03 17:43:33,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:33,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2018-12-03 17:43:33,336 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:33,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-03 17:43:33,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-03 17:43:33,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-12-03 17:43:33,338 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 16 states. [2018-12-03 17:43:33,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:33,417 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2018-12-03 17:43:33,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-03 17:43:33,417 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 56 [2018-12-03 17:43:33,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:33,419 INFO L225 Difference]: With dead ends: 79 [2018-12-03 17:43:33,419 INFO L226 Difference]: Without dead ends: 61 [2018-12-03 17:43:33,420 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-12-03 17:43:33,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-12-03 17:43:33,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2018-12-03 17:43:33,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-12-03 17:43:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2018-12-03 17:43:33,434 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 56 [2018-12-03 17:43:33,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:33,434 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2018-12-03 17:43:33,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-03 17:43:33,434 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2018-12-03 17:43:33,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-12-03 17:43:33,435 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:33,435 INFO L402 BasicCegarLoop]: trace histogram [19, 18, 14, 5, 1, 1, 1] [2018-12-03 17:43:33,435 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:33,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:33,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1727210473, now seen corresponding path program 14 times [2018-12-03 17:43:33,436 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:33,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:33,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:43:33,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:33,437 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 190 proven. 301 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-03 17:43:33,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:33,627 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:33,627 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:33,627 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:33,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:33,628 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2018-12-03 17:43:33,637 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:43:33,637 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:43:33,666 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-12-03 17:43:33,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:43:33,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 336 proven. 57 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-12-03 17:43:33,873 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 336 proven. 57 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-12-03 17:43:34,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:34,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 23 [2018-12-03 17:43:34,203 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:34,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-03 17:43:34,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-03 17:43:34,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2018-12-03 17:43:34,205 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 23 states. [2018-12-03 17:43:34,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:34,902 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2018-12-03 17:43:34,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-12-03 17:43:34,911 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 59 [2018-12-03 17:43:34,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:34,912 INFO L225 Difference]: With dead ends: 98 [2018-12-03 17:43:34,912 INFO L226 Difference]: Without dead ends: 80 [2018-12-03 17:43:34,913 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 101 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=547, Invalid=1259, Unknown=0, NotChecked=0, Total=1806 [2018-12-03 17:43:34,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-12-03 17:43:34,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2018-12-03 17:43:34,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-12-03 17:43:34,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2018-12-03 17:43:34,940 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 59 [2018-12-03 17:43:34,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:34,940 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2018-12-03 17:43:34,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-03 17:43:34,940 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2018-12-03 17:43:34,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-12-03 17:43:34,941 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:34,941 INFO L402 BasicCegarLoop]: trace histogram [21, 20, 15, 6, 1, 1, 1] [2018-12-03 17:43:34,943 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:34,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:34,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1530980185, now seen corresponding path program 15 times [2018-12-03 17:43:34,943 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:34,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:34,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:43:34,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:34,944 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 250 proven. 345 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-12-03 17:43:35,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:35,186 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:35,186 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:35,186 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:35,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:35,186 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2018-12-03 17:43:35,196 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:43:35,196 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:43:35,220 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:43:35,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:43:35,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 250 proven. 345 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-12-03 17:43:35,236 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:35,938 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 250 proven. 345 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-12-03 17:43:35,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:35,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2018-12-03 17:43:35,957 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:35,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-03 17:43:35,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-03 17:43:35,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-12-03 17:43:35,959 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand 18 states. [2018-12-03 17:43:36,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:36,117 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2018-12-03 17:43:36,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-03 17:43:36,117 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2018-12-03 17:43:36,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:36,117 INFO L225 Difference]: With dead ends: 91 [2018-12-03 17:43:36,118 INFO L226 Difference]: Without dead ends: 70 [2018-12-03 17:43:36,118 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-12-03 17:43:36,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-12-03 17:43:36,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2018-12-03 17:43:36,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-12-03 17:43:36,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2018-12-03 17:43:36,132 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 65 [2018-12-03 17:43:36,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:36,132 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2018-12-03 17:43:36,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-03 17:43:36,132 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2018-12-03 17:43:36,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-12-03 17:43:36,133 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:36,133 INFO L402 BasicCegarLoop]: trace histogram [22, 21, 16, 6, 1, 1, 1] [2018-12-03 17:43:36,133 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:36,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:36,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1594238893, now seen corresponding path program 16 times [2018-12-03 17:43:36,134 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:36,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:36,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:43:36,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:36,135 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 266 proven. 392 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-12-03 17:43:36,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:36,356 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:36,356 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:36,356 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:36,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:36,357 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:43:36,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:43:36,366 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:43:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:36,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 266 proven. 392 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-12-03 17:43:36,397 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:37,011 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 266 proven. 392 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-12-03 17:43:37,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:37,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2018-12-03 17:43:37,030 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:37,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-03 17:43:37,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-03 17:43:37,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-12-03 17:43:37,032 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 19 states. [2018-12-03 17:43:37,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:37,227 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2018-12-03 17:43:37,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-03 17:43:37,228 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 68 [2018-12-03 17:43:37,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:37,229 INFO L225 Difference]: With dead ends: 94 [2018-12-03 17:43:37,229 INFO L226 Difference]: Without dead ends: 73 [2018-12-03 17:43:37,230 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-12-03 17:43:37,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-12-03 17:43:37,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2018-12-03 17:43:37,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-12-03 17:43:37,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2018-12-03 17:43:37,243 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 68 [2018-12-03 17:43:37,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:37,243 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2018-12-03 17:43:37,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-03 17:43:37,243 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2018-12-03 17:43:37,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-12-03 17:43:37,243 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:37,244 INFO L402 BasicCegarLoop]: trace histogram [23, 22, 17, 6, 1, 1, 1] [2018-12-03 17:43:37,244 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:37,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:37,244 INFO L82 PathProgramCache]: Analyzing trace with hash -643765977, now seen corresponding path program 17 times [2018-12-03 17:43:37,244 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:37,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:37,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:43:37,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:37,245 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 282 proven. 442 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-12-03 17:43:37,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:37,452 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:37,452 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:37,452 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:37,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:37,452 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:43:37,462 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:43:37,463 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:43:37,499 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-12-03 17:43:37,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:43:37,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 493 proven. 86 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-12-03 17:43:37,919 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 493 proven. 86 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-12-03 17:43:38,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:38,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 9] total 27 [2018-12-03 17:43:38,101 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:38,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-12-03 17:43:38,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-12-03 17:43:38,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2018-12-03 17:43:38,102 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand 27 states. [2018-12-03 17:43:38,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:38,685 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2018-12-03 17:43:38,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-03 17:43:38,686 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 71 [2018-12-03 17:43:38,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:38,687 INFO L225 Difference]: With dead ends: 116 [2018-12-03 17:43:38,687 INFO L226 Difference]: Without dead ends: 95 [2018-12-03 17:43:38,688 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 122 SyntacticMatches, 12 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=758, Invalid=1792, Unknown=0, NotChecked=0, Total=2550 [2018-12-03 17:43:38,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-12-03 17:43:38,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2018-12-03 17:43:38,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-12-03 17:43:38,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2018-12-03 17:43:38,705 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 71 [2018-12-03 17:43:38,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:38,706 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2018-12-03 17:43:38,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-12-03 17:43:38,706 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2018-12-03 17:43:38,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-12-03 17:43:38,707 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:38,707 INFO L402 BasicCegarLoop]: trace histogram [25, 24, 18, 7, 1, 1, 1] [2018-12-03 17:43:38,707 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:38,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:38,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1103739735, now seen corresponding path program 18 times [2018-12-03 17:43:38,708 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:38,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:38,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:43:38,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:38,709 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 354 proven. 495 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-12-03 17:43:39,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:39,217 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:39,217 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:39,217 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:39,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:39,218 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:43:39,234 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:43:39,234 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:43:39,282 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:43:39,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:43:39,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 354 proven. 495 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-12-03 17:43:39,295 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 354 proven. 495 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-12-03 17:43:39,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:39,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 39 [2018-12-03 17:43:39,757 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:39,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-03 17:43:39,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-03 17:43:39,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-12-03 17:43:39,759 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand 21 states. [2018-12-03 17:43:39,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:39,831 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2018-12-03 17:43:39,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-03 17:43:39,831 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 77 [2018-12-03 17:43:39,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:39,832 INFO L225 Difference]: With dead ends: 106 [2018-12-03 17:43:39,832 INFO L226 Difference]: Without dead ends: 82 [2018-12-03 17:43:39,832 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-12-03 17:43:39,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-12-03 17:43:39,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2018-12-03 17:43:39,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-12-03 17:43:39,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2018-12-03 17:43:39,846 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 77 [2018-12-03 17:43:39,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:39,846 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2018-12-03 17:43:39,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-03 17:43:39,846 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2018-12-03 17:43:39,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-12-03 17:43:39,847 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:39,847 INFO L402 BasicCegarLoop]: trace histogram [26, 25, 19, 7, 1, 1, 1] [2018-12-03 17:43:39,847 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:39,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:39,848 INFO L82 PathProgramCache]: Analyzing trace with hash 894624341, now seen corresponding path program 19 times [2018-12-03 17:43:39,848 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:39,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:39,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:43:39,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:39,849 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 373 proven. 551 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-12-03 17:43:40,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:40,208 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:40,208 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:40,208 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:40,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:40,208 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:43:40,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:43:40,217 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:43:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:40,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 373 proven. 551 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-12-03 17:43:40,257 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 373 proven. 551 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-12-03 17:43:40,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:40,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2018-12-03 17:43:40,776 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:40,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-03 17:43:40,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-03 17:43:40,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-12-03 17:43:40,777 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 22 states. [2018-12-03 17:43:40,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:40,881 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2018-12-03 17:43:40,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-03 17:43:40,882 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 80 [2018-12-03 17:43:40,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:40,882 INFO L225 Difference]: With dead ends: 109 [2018-12-03 17:43:40,882 INFO L226 Difference]: Without dead ends: 85 [2018-12-03 17:43:40,883 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-12-03 17:43:40,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-12-03 17:43:40,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2018-12-03 17:43:40,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-12-03 17:43:40,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2018-12-03 17:43:40,899 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 80 [2018-12-03 17:43:40,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:40,899 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2018-12-03 17:43:40,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-03 17:43:40,900 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2018-12-03 17:43:40,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-12-03 17:43:40,900 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:40,900 INFO L402 BasicCegarLoop]: trace histogram [27, 26, 20, 7, 1, 1, 1] [2018-12-03 17:43:40,901 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:40,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:40,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1617122601, now seen corresponding path program 20 times [2018-12-03 17:43:40,901 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:40,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:40,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:43:40,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:40,902 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 392 proven. 610 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-12-03 17:43:41,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:41,177 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:41,177 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:41,177 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:41,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:41,178 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:43:41,190 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:43:41,190 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:43:41,227 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-12-03 17:43:41,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:43:41,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 680 proven. 121 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-12-03 17:43:41,365 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 680 proven. 121 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-12-03 17:43:41,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:41,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10, 10] total 31 [2018-12-03 17:43:41,587 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:41,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-12-03 17:43:41,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-12-03 17:43:41,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2018-12-03 17:43:41,589 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand 31 states. [2018-12-03 17:43:42,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:42,095 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2018-12-03 17:43:42,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-12-03 17:43:42,098 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 83 [2018-12-03 17:43:42,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:42,099 INFO L225 Difference]: With dead ends: 134 [2018-12-03 17:43:42,099 INFO L226 Difference]: Without dead ends: 110 [2018-12-03 17:43:42,100 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 143 SyntacticMatches, 14 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1003, Invalid=2419, Unknown=0, NotChecked=0, Total=3422 [2018-12-03 17:43:42,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-12-03 17:43:42,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2018-12-03 17:43:42,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-12-03 17:43:42,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2018-12-03 17:43:42,123 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 83 [2018-12-03 17:43:42,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:42,123 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2018-12-03 17:43:42,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-12-03 17:43:42,123 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2018-12-03 17:43:42,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-12-03 17:43:42,124 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:42,124 INFO L402 BasicCegarLoop]: trace histogram [29, 28, 21, 8, 1, 1, 1] [2018-12-03 17:43:42,124 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:42,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:42,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1146805401, now seen corresponding path program 21 times [2018-12-03 17:43:42,125 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:42,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:42,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:43:42,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:42,126 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 476 proven. 672 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-12-03 17:43:42,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:42,629 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:42,629 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:42,629 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:42,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:42,629 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:43:42,639 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:43:42,639 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:43:42,673 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:43:42,673 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:43:42,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 476 proven. 672 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-12-03 17:43:42,696 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 476 proven. 672 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-12-03 17:43:43,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:43,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2018-12-03 17:43:43,380 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:43,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-03 17:43:43,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-03 17:43:43,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-12-03 17:43:43,382 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand 24 states. [2018-12-03 17:43:43,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:43,477 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2018-12-03 17:43:43,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-03 17:43:43,477 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2018-12-03 17:43:43,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:43,478 INFO L225 Difference]: With dead ends: 121 [2018-12-03 17:43:43,478 INFO L226 Difference]: Without dead ends: 94 [2018-12-03 17:43:43,479 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-12-03 17:43:43,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-12-03 17:43:43,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2018-12-03 17:43:43,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-12-03 17:43:43,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2018-12-03 17:43:43,500 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 89 [2018-12-03 17:43:43,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:43,501 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2018-12-03 17:43:43,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-03 17:43:43,501 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2018-12-03 17:43:43,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-12-03 17:43:43,501 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:43,501 INFO L402 BasicCegarLoop]: trace histogram [30, 29, 22, 8, 1, 1, 1] [2018-12-03 17:43:43,502 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:43,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:43,502 INFO L82 PathProgramCache]: Analyzing trace with hash 63348499, now seen corresponding path program 22 times [2018-12-03 17:43:43,502 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:43,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:43,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:43:43,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:43,503 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 498 proven. 737 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-12-03 17:43:44,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:44,431 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:44,431 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:44,431 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:44,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:44,431 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:43:44,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:43:44,440 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:43:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:44,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:44,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 498 proven. 737 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-12-03 17:43:44,487 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 498 proven. 737 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-12-03 17:43:45,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:45,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2018-12-03 17:43:45,115 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:45,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-03 17:43:45,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-03 17:43:45,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-12-03 17:43:45,117 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand 25 states. [2018-12-03 17:43:45,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:45,251 INFO L93 Difference]: Finished difference Result 124 states and 141 transitions. [2018-12-03 17:43:45,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-03 17:43:45,252 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 92 [2018-12-03 17:43:45,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:45,253 INFO L225 Difference]: With dead ends: 124 [2018-12-03 17:43:45,253 INFO L226 Difference]: Without dead ends: 97 [2018-12-03 17:43:45,255 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-12-03 17:43:45,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-12-03 17:43:45,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2018-12-03 17:43:45,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-12-03 17:43:45,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2018-12-03 17:43:45,276 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 92 [2018-12-03 17:43:45,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:45,276 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2018-12-03 17:43:45,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-03 17:43:45,277 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2018-12-03 17:43:45,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-12-03 17:43:45,277 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:45,277 INFO L402 BasicCegarLoop]: trace histogram [31, 30, 23, 8, 1, 1, 1] [2018-12-03 17:43:45,278 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:45,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:45,278 INFO L82 PathProgramCache]: Analyzing trace with hash -197299225, now seen corresponding path program 23 times [2018-12-03 17:43:45,278 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:45,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:45,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:43:45,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:45,279 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 520 proven. 805 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-12-03 17:43:46,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:46,206 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:46,206 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:46,207 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:46,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:46,207 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:43:46,218 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:43:46,218 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:43:46,262 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-12-03 17:43:46,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:43:46,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 897 proven. 162 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2018-12-03 17:43:46,460 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 897 proven. 162 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2018-12-03 17:43:46,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:46,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 11, 11] total 35 [2018-12-03 17:43:46,703 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:46,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-12-03 17:43:46,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-12-03 17:43:46,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2018-12-03 17:43:46,704 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand 35 states. [2018-12-03 17:43:47,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:47,278 INFO L93 Difference]: Finished difference Result 152 states and 178 transitions. [2018-12-03 17:43:47,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-12-03 17:43:47,278 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 95 [2018-12-03 17:43:47,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:47,279 INFO L225 Difference]: With dead ends: 152 [2018-12-03 17:43:47,279 INFO L226 Difference]: Without dead ends: 125 [2018-12-03 17:43:47,282 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 16 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1282, Invalid=3140, Unknown=0, NotChecked=0, Total=4422 [2018-12-03 17:43:47,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-12-03 17:43:47,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 102. [2018-12-03 17:43:47,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-12-03 17:43:47,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2018-12-03 17:43:47,307 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 95 [2018-12-03 17:43:47,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:47,308 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2018-12-03 17:43:47,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-12-03 17:43:47,308 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2018-12-03 17:43:47,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-12-03 17:43:47,308 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:47,309 INFO L402 BasicCegarLoop]: trace histogram [33, 32, 24, 9, 1, 1, 1] [2018-12-03 17:43:47,309 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:47,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:47,309 INFO L82 PathProgramCache]: Analyzing trace with hash 857310697, now seen corresponding path program 24 times [2018-12-03 17:43:47,309 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:47,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:47,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:43:47,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:47,310 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 616 proven. 876 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-12-03 17:43:47,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:47,685 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:47,685 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:47,686 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:47,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:47,686 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:43:47,695 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:43:47,695 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:43:47,730 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:43:47,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:43:47,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 616 proven. 876 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-12-03 17:43:47,745 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 616 proven. 876 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-12-03 17:43:48,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:48,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2018-12-03 17:43:48,480 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:48,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-12-03 17:43:48,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-12-03 17:43:48,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:43:48,482 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand 27 states. [2018-12-03 17:43:48,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:48,626 INFO L93 Difference]: Finished difference Result 136 states and 155 transitions. [2018-12-03 17:43:48,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-12-03 17:43:48,626 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 101 [2018-12-03 17:43:48,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:48,628 INFO L225 Difference]: With dead ends: 136 [2018-12-03 17:43:48,628 INFO L226 Difference]: Without dead ends: 106 [2018-12-03 17:43:48,629 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:43:48,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-12-03 17:43:48,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2018-12-03 17:43:48,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-12-03 17:43:48,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 114 transitions. [2018-12-03 17:43:48,653 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 114 transitions. Word has length 101 [2018-12-03 17:43:48,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:48,653 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 114 transitions. [2018-12-03 17:43:48,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-12-03 17:43:48,653 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 114 transitions. [2018-12-03 17:43:48,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-12-03 17:43:48,653 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:48,654 INFO L402 BasicCegarLoop]: trace histogram [34, 33, 25, 9, 1, 1, 1] [2018-12-03 17:43:48,654 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:48,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:48,654 INFO L82 PathProgramCache]: Analyzing trace with hash -2048729195, now seen corresponding path program 25 times [2018-12-03 17:43:48,654 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:48,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:48,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:43:48,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:48,655 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:49,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 641 proven. 950 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-12-03 17:43:49,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:49,080 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:49,080 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:49,080 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:49,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:49,080 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:43:49,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:43:49,090 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:43:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:49,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 641 proven. 950 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-12-03 17:43:49,134 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 641 proven. 950 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-12-03 17:43:50,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:50,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 51 [2018-12-03 17:43:50,171 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:50,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-12-03 17:43:50,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-12-03 17:43:50,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:43:50,173 INFO L87 Difference]: Start difference. First operand 105 states and 114 transitions. Second operand 28 states. [2018-12-03 17:43:50,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:50,402 INFO L93 Difference]: Finished difference Result 139 states and 158 transitions. [2018-12-03 17:43:50,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-12-03 17:43:50,403 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 104 [2018-12-03 17:43:50,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:50,403 INFO L225 Difference]: With dead ends: 139 [2018-12-03 17:43:50,403 INFO L226 Difference]: Without dead ends: 109 [2018-12-03 17:43:50,404 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:43:50,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-12-03 17:43:50,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2018-12-03 17:43:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-12-03 17:43:50,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 117 transitions. [2018-12-03 17:43:50,431 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 117 transitions. Word has length 104 [2018-12-03 17:43:50,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:50,431 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 117 transitions. [2018-12-03 17:43:50,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-12-03 17:43:50,431 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 117 transitions. [2018-12-03 17:43:50,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-12-03 17:43:50,431 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:50,432 INFO L402 BasicCegarLoop]: trace histogram [35, 34, 26, 9, 1, 1, 1] [2018-12-03 17:43:50,432 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:50,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:50,432 INFO L82 PathProgramCache]: Analyzing trace with hash 2067601001, now seen corresponding path program 26 times [2018-12-03 17:43:50,432 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:50,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:50,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:43:50,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:50,433 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 666 proven. 1027 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-12-03 17:43:51,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:51,242 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:51,242 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:51,242 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:51,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:51,242 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:43:51,250 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:43:51,251 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:43:51,299 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-12-03 17:43:51,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:43:51,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 1144 proven. 209 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2018-12-03 17:43:51,474 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 1144 proven. 209 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2018-12-03 17:43:51,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:51,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 12, 12] total 39 [2018-12-03 17:43:51,808 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:51,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-12-03 17:43:51,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-12-03 17:43:51,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1011, Unknown=0, NotChecked=0, Total=1482 [2018-12-03 17:43:51,809 INFO L87 Difference]: Start difference. First operand 108 states and 117 transitions. Second operand 39 states. [2018-12-03 17:43:52,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:52,560 INFO L93 Difference]: Finished difference Result 170 states and 199 transitions. [2018-12-03 17:43:52,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-12-03 17:43:52,560 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 107 [2018-12-03 17:43:52,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:52,561 INFO L225 Difference]: With dead ends: 170 [2018-12-03 17:43:52,561 INFO L226 Difference]: Without dead ends: 140 [2018-12-03 17:43:52,563 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 185 SyntacticMatches, 18 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1595, Invalid=3955, Unknown=0, NotChecked=0, Total=5550 [2018-12-03 17:43:52,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-12-03 17:43:52,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 114. [2018-12-03 17:43:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-12-03 17:43:52,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2018-12-03 17:43:52,602 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 107 [2018-12-03 17:43:52,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:52,602 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2018-12-03 17:43:52,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-12-03 17:43:52,602 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2018-12-03 17:43:52,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-12-03 17:43:52,603 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:52,603 INFO L402 BasicCegarLoop]: trace histogram [37, 36, 27, 10, 1, 1, 1] [2018-12-03 17:43:52,603 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:52,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:52,603 INFO L82 PathProgramCache]: Analyzing trace with hash -756310489, now seen corresponding path program 27 times [2018-12-03 17:43:52,604 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:52,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:52,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:43:52,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:52,605 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 774 proven. 1107 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-03 17:43:53,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:53,338 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:53,338 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:53,338 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:53,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:53,338 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:43:53,349 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:43:53,349 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:43:53,387 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:43:53,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:43:53,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 774 proven. 1107 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-03 17:43:53,410 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 774 proven. 1107 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-03 17:43:55,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:55,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 51 [2018-12-03 17:43:55,445 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:55,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-12-03 17:43:55,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-12-03 17:43:55,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:43:55,447 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand 30 states. [2018-12-03 17:43:55,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:55,662 INFO L93 Difference]: Finished difference Result 151 states and 172 transitions. [2018-12-03 17:43:55,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-12-03 17:43:55,662 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 113 [2018-12-03 17:43:55,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:55,663 INFO L225 Difference]: With dead ends: 151 [2018-12-03 17:43:55,664 INFO L226 Difference]: Without dead ends: 118 [2018-12-03 17:43:55,665 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 197 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:43:55,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-12-03 17:43:55,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2018-12-03 17:43:55,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-12-03 17:43:55,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 127 transitions. [2018-12-03 17:43:55,701 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 127 transitions. Word has length 113 [2018-12-03 17:43:55,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:55,702 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 127 transitions. [2018-12-03 17:43:55,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-12-03 17:43:55,702 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 127 transitions. [2018-12-03 17:43:55,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-12-03 17:43:55,702 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:55,703 INFO L402 BasicCegarLoop]: trace histogram [38, 37, 28, 10, 1, 1, 1] [2018-12-03 17:43:55,703 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:55,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:55,703 INFO L82 PathProgramCache]: Analyzing trace with hash 226481619, now seen corresponding path program 28 times [2018-12-03 17:43:55,703 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:55,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:55,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:43:55,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:55,705 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 802 proven. 1190 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-03 17:43:57,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:57,004 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:57,004 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:57,004 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:57,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:57,004 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:43:57,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:43:57,014 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:43:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:57,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 802 proven. 1190 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-03 17:43:57,075 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 802 proven. 1190 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-03 17:43:57,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:57,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 51 [2018-12-03 17:43:57,846 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:57,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-12-03 17:43:57,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-12-03 17:43:57,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:43:57,848 INFO L87 Difference]: Start difference. First operand 117 states and 127 transitions. Second operand 31 states. [2018-12-03 17:43:58,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:43:58,017 INFO L93 Difference]: Finished difference Result 154 states and 175 transitions. [2018-12-03 17:43:58,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-03 17:43:58,017 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 116 [2018-12-03 17:43:58,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:43:58,018 INFO L225 Difference]: With dead ends: 154 [2018-12-03 17:43:58,018 INFO L226 Difference]: Without dead ends: 121 [2018-12-03 17:43:58,019 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 202 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:43:58,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-12-03 17:43:58,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2018-12-03 17:43:58,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-12-03 17:43:58,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 130 transitions. [2018-12-03 17:43:58,052 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 130 transitions. Word has length 116 [2018-12-03 17:43:58,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:43:58,052 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 130 transitions. [2018-12-03 17:43:58,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-12-03 17:43:58,052 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 130 transitions. [2018-12-03 17:43:58,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-12-03 17:43:58,053 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:43:58,053 INFO L402 BasicCegarLoop]: trace histogram [39, 38, 29, 10, 1, 1, 1] [2018-12-03 17:43:58,053 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:43:58,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:43:58,053 INFO L82 PathProgramCache]: Analyzing trace with hash -205885785, now seen corresponding path program 29 times [2018-12-03 17:43:58,053 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:43:58,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:58,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:43:58,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:43:58,054 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:43:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:43:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 830 proven. 1276 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-03 17:43:58,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:58,493 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:43:58,493 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:43:58,493 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:43:58,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:43:58,493 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:43:58,502 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:43:58,503 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:43:58,558 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-12-03 17:43:58,558 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:43:58,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:43:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 1421 proven. 262 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2018-12-03 17:43:58,763 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:43:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 1421 proven. 262 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2018-12-03 17:43:59,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:43:59,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 13, 13] total 43 [2018-12-03 17:43:59,108 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:43:59,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-12-03 17:43:59,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-12-03 17:43:59,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=573, Invalid=1233, Unknown=0, NotChecked=0, Total=1806 [2018-12-03 17:43:59,109 INFO L87 Difference]: Start difference. First operand 120 states and 130 transitions. Second operand 43 states. [2018-12-03 17:44:00,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:44:00,106 INFO L93 Difference]: Finished difference Result 188 states and 220 transitions. [2018-12-03 17:44:00,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-12-03 17:44:00,107 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 119 [2018-12-03 17:44:00,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:44:00,107 INFO L225 Difference]: With dead ends: 188 [2018-12-03 17:44:00,107 INFO L226 Difference]: Without dead ends: 155 [2018-12-03 17:44:00,108 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 206 SyntacticMatches, 20 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1942, Invalid=4864, Unknown=0, NotChecked=0, Total=6806 [2018-12-03 17:44:00,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-12-03 17:44:00,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 126. [2018-12-03 17:44:00,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-12-03 17:44:00,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 137 transitions. [2018-12-03 17:44:00,151 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 137 transitions. Word has length 119 [2018-12-03 17:44:00,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:44:00,151 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 137 transitions. [2018-12-03 17:44:00,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-12-03 17:44:00,151 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 137 transitions. [2018-12-03 17:44:00,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-12-03 17:44:00,152 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:44:00,152 INFO L402 BasicCegarLoop]: trace histogram [41, 40, 30, 11, 1, 1, 1] [2018-12-03 17:44:00,152 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:44:00,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:44:00,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1090148137, now seen corresponding path program 30 times [2018-12-03 17:44:00,153 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:44:00,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:00,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:44:00,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:00,154 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:44:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:44:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 950 proven. 1365 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-03 17:44:00,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:00,679 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:44:00,679 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:44:00,679 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:44:00,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:00,679 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:44:00,688 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:44:00,688 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:44:00,750 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:44:00,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:44:00,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:44:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 950 proven. 1365 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-03 17:44:00,774 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:44:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 950 proven. 1365 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-03 17:44:01,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:44:01,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 51 [2018-12-03 17:44:01,687 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:44:01,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-12-03 17:44:01,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-12-03 17:44:01,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:44:01,688 INFO L87 Difference]: Start difference. First operand 126 states and 137 transitions. Second operand 33 states. [2018-12-03 17:44:01,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:44:01,840 INFO L93 Difference]: Finished difference Result 166 states and 189 transitions. [2018-12-03 17:44:01,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-03 17:44:01,840 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 125 [2018-12-03 17:44:01,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:44:01,841 INFO L225 Difference]: With dead ends: 166 [2018-12-03 17:44:01,841 INFO L226 Difference]: Without dead ends: 130 [2018-12-03 17:44:01,842 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 218 SyntacticMatches, 12 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:44:01,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-12-03 17:44:01,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2018-12-03 17:44:01,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-12-03 17:44:01,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 140 transitions. [2018-12-03 17:44:01,883 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 140 transitions. Word has length 125 [2018-12-03 17:44:01,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:44:01,884 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 140 transitions. [2018-12-03 17:44:01,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-12-03 17:44:01,884 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 140 transitions. [2018-12-03 17:44:01,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-12-03 17:44:01,884 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:44:01,885 INFO L402 BasicCegarLoop]: trace histogram [42, 41, 31, 11, 1, 1, 1] [2018-12-03 17:44:01,885 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:44:01,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:44:01,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1543738155, now seen corresponding path program 31 times [2018-12-03 17:44:01,885 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:44:01,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:01,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:44:01,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:01,886 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:44:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:44:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 981 proven. 1457 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-03 17:44:02,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:02,407 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:44:02,407 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:44:02,408 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:44:02,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:02,408 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:44:02,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:44:02,417 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:44:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:44:02,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:44:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 981 proven. 1457 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-03 17:44:02,482 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:44:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 981 proven. 1457 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-03 17:44:03,364 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:44:03,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 51 [2018-12-03 17:44:03,365 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:44:03,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-12-03 17:44:03,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-12-03 17:44:03,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:44:03,366 INFO L87 Difference]: Start difference. First operand 129 states and 140 transitions. Second operand 34 states. [2018-12-03 17:44:03,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:44:03,552 INFO L93 Difference]: Finished difference Result 169 states and 192 transitions. [2018-12-03 17:44:03,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-12-03 17:44:03,552 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 128 [2018-12-03 17:44:03,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:44:03,553 INFO L225 Difference]: With dead ends: 169 [2018-12-03 17:44:03,554 INFO L226 Difference]: Without dead ends: 133 [2018-12-03 17:44:03,554 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 223 SyntacticMatches, 14 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:44:03,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-12-03 17:44:03,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2018-12-03 17:44:03,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-12-03 17:44:03,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 143 transitions. [2018-12-03 17:44:03,601 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 143 transitions. Word has length 128 [2018-12-03 17:44:03,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:44:03,602 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 143 transitions. [2018-12-03 17:44:03,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-12-03 17:44:03,602 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 143 transitions. [2018-12-03 17:44:03,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-12-03 17:44:03,603 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:44:03,603 INFO L402 BasicCegarLoop]: trace histogram [43, 42, 32, 11, 1, 1, 1] [2018-12-03 17:44:03,603 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:44:03,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:44:03,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1402234793, now seen corresponding path program 32 times [2018-12-03 17:44:03,604 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:44:03,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:03,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:44:03,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:03,605 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:44:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:44:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2709 backedges. 1012 proven. 1552 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-03 17:44:04,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:04,581 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:44:04,581 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:44:04,581 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:44:04,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:04,581 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:44:04,590 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:44:04,590 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:44:04,653 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-12-03 17:44:04,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:44:04,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:44:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2709 backedges. 1728 proven. 321 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-12-03 17:44:05,031 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:44:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2709 backedges. 1728 proven. 321 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-12-03 17:44:05,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:44:05,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 14, 14] total 47 [2018-12-03 17:44:05,496 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:44:05,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-12-03 17:44:05,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-12-03 17:44:05,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=685, Invalid=1477, Unknown=0, NotChecked=0, Total=2162 [2018-12-03 17:44:05,497 INFO L87 Difference]: Start difference. First operand 132 states and 143 transitions. Second operand 47 states. [2018-12-03 17:44:06,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:44:06,608 INFO L93 Difference]: Finished difference Result 206 states and 241 transitions. [2018-12-03 17:44:06,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-12-03 17:44:06,608 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 131 [2018-12-03 17:44:06,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:44:06,609 INFO L225 Difference]: With dead ends: 206 [2018-12-03 17:44:06,610 INFO L226 Difference]: Without dead ends: 170 [2018-12-03 17:44:06,611 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 227 SyntacticMatches, 22 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2323, Invalid=5867, Unknown=0, NotChecked=0, Total=8190 [2018-12-03 17:44:06,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-12-03 17:44:06,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 138. [2018-12-03 17:44:06,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-12-03 17:44:06,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 150 transitions. [2018-12-03 17:44:06,670 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 150 transitions. Word has length 131 [2018-12-03 17:44:06,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:44:06,670 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 150 transitions. [2018-12-03 17:44:06,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-12-03 17:44:06,671 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 150 transitions. [2018-12-03 17:44:06,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-12-03 17:44:06,671 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:44:06,671 INFO L402 BasicCegarLoop]: trace histogram [45, 44, 33, 12, 1, 1, 1] [2018-12-03 17:44:06,671 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:44:06,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:44:06,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1241417959, now seen corresponding path program 33 times [2018-12-03 17:44:06,672 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:44:06,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:06,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:44:06,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:06,672 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:44:06,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:44:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 1144 proven. 1650 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2018-12-03 17:44:07,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:07,252 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:44:07,252 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:44:07,252 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:44:07,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:07,252 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:44:07,270 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:44:07,270 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:44:07,337 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:44:07,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:44:07,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:44:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 298 proven. 2667 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-03 17:44:07,645 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:44:08,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 298 proven. 2667 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-03 17:44:08,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:44:08,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 44, 44] total 51 [2018-12-03 17:44:08,598 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:44:08,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-12-03 17:44:08,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-12-03 17:44:08,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:44:08,600 INFO L87 Difference]: Start difference. First operand 138 states and 150 transitions. Second operand 45 states. [2018-12-03 17:44:09,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:44:09,240 INFO L93 Difference]: Finished difference Result 208 states and 242 transitions. [2018-12-03 17:44:09,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-12-03 17:44:09,241 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 137 [2018-12-03 17:44:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:44:09,242 INFO L225 Difference]: With dead ends: 208 [2018-12-03 17:44:09,242 INFO L226 Difference]: Without dead ends: 169 [2018-12-03 17:44:09,243 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 221 SyntacticMatches, 36 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:44:09,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-12-03 17:44:09,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2018-12-03 17:44:09,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-12-03 17:44:09,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 180 transitions. [2018-12-03 17:44:09,345 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 180 transitions. Word has length 137 [2018-12-03 17:44:09,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:44:09,345 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 180 transitions. [2018-12-03 17:44:09,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-12-03 17:44:09,345 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 180 transitions. [2018-12-03 17:44:09,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-12-03 17:44:09,347 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:44:09,347 INFO L402 BasicCegarLoop]: trace histogram [55, 54, 43, 12, 1, 1, 1] [2018-12-03 17:44:09,347 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:44:09,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:44:09,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1120314521, now seen corresponding path program 34 times [2018-12-03 17:44:09,348 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:44:09,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:09,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:44:09,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:09,349 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:44:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:44:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 1484 proven. 2795 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2018-12-03 17:44:10,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:10,834 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:44:10,834 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:44:10,834 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:44:10,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:10,834 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:44:10,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:44:10,842 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:44:10,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:44:10,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:44:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 1484 proven. 2795 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2018-12-03 17:44:10,932 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:44:11,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 1484 proven. 2795 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2018-12-03 17:44:11,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:44:11,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 51 [2018-12-03 17:44:11,952 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:44:11,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-12-03 17:44:11,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-12-03 17:44:11,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:44:11,953 INFO L87 Difference]: Start difference. First operand 168 states and 180 transitions. Second operand 46 states. [2018-12-03 17:44:12,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:44:12,213 INFO L93 Difference]: Finished difference Result 211 states and 236 transitions. [2018-12-03 17:44:12,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-12-03 17:44:12,213 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 167 [2018-12-03 17:44:12,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:44:12,215 INFO L225 Difference]: With dead ends: 211 [2018-12-03 17:44:12,215 INFO L226 Difference]: Without dead ends: 172 [2018-12-03 17:44:12,215 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 289 SyntacticMatches, 38 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:44:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-12-03 17:44:12,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2018-12-03 17:44:12,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-12-03 17:44:12,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 183 transitions. [2018-12-03 17:44:12,280 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 183 transitions. Word has length 167 [2018-12-03 17:44:12,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:44:12,281 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 183 transitions. [2018-12-03 17:44:12,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-12-03 17:44:12,281 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 183 transitions. [2018-12-03 17:44:12,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-12-03 17:44:12,282 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:44:12,282 INFO L402 BasicCegarLoop]: trace histogram [56, 55, 44, 12, 1, 1, 1] [2018-12-03 17:44:12,282 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:44:12,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:44:12,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1547199981, now seen corresponding path program 35 times [2018-12-03 17:44:12,282 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:44:12,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:12,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:44:12,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:12,283 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:44:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:44:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 1518 proven. 2926 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2018-12-03 17:44:13,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:13,472 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:44:13,472 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:44:13,472 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:44:13,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:13,472 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:44:13,481 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:44:13,481 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:44:13,574 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-12-03 17:44:13,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:44:13,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:44:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 2713 proven. 386 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2018-12-03 17:44:13,913 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:44:14,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 2713 proven. 386 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2018-12-03 17:44:14,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:44:14,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 15, 15] total 60 [2018-12-03 17:44:14,462 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:44:14,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-12-03 17:44:14,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-12-03 17:44:14,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1185, Invalid=2355, Unknown=0, NotChecked=0, Total=3540 [2018-12-03 17:44:14,464 INFO L87 Difference]: Start difference. First operand 171 states and 183 transitions. Second operand 60 states. [2018-12-03 17:44:16,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:44:16,579 INFO L93 Difference]: Finished difference Result 251 states and 289 transitions. [2018-12-03 17:44:16,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-12-03 17:44:16,580 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 170 [2018-12-03 17:44:16,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:44:16,581 INFO L225 Difference]: With dead ends: 251 [2018-12-03 17:44:16,582 INFO L226 Difference]: Without dead ends: 212 [2018-12-03 17:44:16,582 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 302 SyntacticMatches, 24 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3477 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3989, Invalid=9583, Unknown=0, NotChecked=0, Total=13572 [2018-12-03 17:44:16,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-12-03 17:44:16,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 177. [2018-12-03 17:44:16,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-12-03 17:44:16,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 190 transitions. [2018-12-03 17:44:16,684 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 190 transitions. Word has length 170 [2018-12-03 17:44:16,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:44:16,684 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 190 transitions. [2018-12-03 17:44:16,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-12-03 17:44:16,685 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 190 transitions. [2018-12-03 17:44:16,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-12-03 17:44:16,686 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:44:16,686 INFO L402 BasicCegarLoop]: trace histogram [58, 57, 45, 13, 1, 1, 1] [2018-12-03 17:44:16,686 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:44:16,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:44:16,687 INFO L82 PathProgramCache]: Analyzing trace with hash -904902635, now seen corresponding path program 36 times [2018-12-03 17:44:16,687 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:44:16,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:16,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:44:16,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:16,688 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:44:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:44:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4959 backedges. 1689 proven. 3060 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-12-03 17:44:17,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:17,904 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:44:17,904 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:44:17,904 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:44:17,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:17,904 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:44:17,914 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:44:17,915 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:44:17,973 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:44:17,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:44:17,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:44:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4959 backedges. 1689 proven. 3060 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-12-03 17:44:18,008 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:44:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4959 backedges. 1689 proven. 3060 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-12-03 17:44:18,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:44:18,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 51 [2018-12-03 17:44:18,952 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:44:18,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-12-03 17:44:18,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-12-03 17:44:18,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:44:18,953 INFO L87 Difference]: Start difference. First operand 177 states and 190 transitions. Second operand 48 states. [2018-12-03 17:44:19,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:44:19,203 INFO L93 Difference]: Finished difference Result 223 states and 250 transitions. [2018-12-03 17:44:19,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-12-03 17:44:19,204 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 176 [2018-12-03 17:44:19,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:44:19,205 INFO L225 Difference]: With dead ends: 223 [2018-12-03 17:44:19,206 INFO L226 Difference]: Without dead ends: 181 [2018-12-03 17:44:19,206 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 305 SyntacticMatches, 42 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:44:19,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-12-03 17:44:19,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2018-12-03 17:44:19,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-12-03 17:44:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 193 transitions. [2018-12-03 17:44:19,284 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 193 transitions. Word has length 176 [2018-12-03 17:44:19,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:44:19,284 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 193 transitions. [2018-12-03 17:44:19,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-12-03 17:44:19,285 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 193 transitions. [2018-12-03 17:44:19,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-12-03 17:44:19,285 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:44:19,285 INFO L402 BasicCegarLoop]: trace histogram [59, 58, 46, 13, 1, 1, 1] [2018-12-03 17:44:19,285 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:44:19,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:44:19,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1308609257, now seen corresponding path program 37 times [2018-12-03 17:44:19,286 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:44:19,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:19,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:44:19,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:19,287 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:44:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:44:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5133 backedges. 1726 proven. 3197 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-12-03 17:44:20,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:20,478 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:44:20,478 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:44:20,478 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:44:20,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:20,479 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:44:20,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:44:20,488 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:44:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:44:20,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:44:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5133 backedges. 1726 proven. 3197 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-12-03 17:44:20,606 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:44:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5133 backedges. 1726 proven. 3197 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-12-03 17:44:22,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:44:22,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 51 [2018-12-03 17:44:22,498 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:44:22,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-12-03 17:44:22,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-12-03 17:44:22,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:44:22,499 INFO L87 Difference]: Start difference. First operand 180 states and 193 transitions. Second operand 49 states. [2018-12-03 17:44:22,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:44:22,803 INFO L93 Difference]: Finished difference Result 226 states and 253 transitions. [2018-12-03 17:44:22,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-12-03 17:44:22,804 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 179 [2018-12-03 17:44:22,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:44:22,805 INFO L225 Difference]: With dead ends: 226 [2018-12-03 17:44:22,805 INFO L226 Difference]: Without dead ends: 184 [2018-12-03 17:44:22,805 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 310 SyntacticMatches, 44 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:44:22,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-12-03 17:44:22,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2018-12-03 17:44:22,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-12-03 17:44:22,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 196 transitions. [2018-12-03 17:44:22,880 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 196 transitions. Word has length 179 [2018-12-03 17:44:22,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:44:22,881 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 196 transitions. [2018-12-03 17:44:22,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-12-03 17:44:22,881 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 196 transitions. [2018-12-03 17:44:22,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-12-03 17:44:22,882 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:44:22,882 INFO L402 BasicCegarLoop]: trace histogram [60, 59, 47, 13, 1, 1, 1] [2018-12-03 17:44:22,883 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:44:22,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:44:22,883 INFO L82 PathProgramCache]: Analyzing trace with hash -886478955, now seen corresponding path program 38 times [2018-12-03 17:44:22,883 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:44:22,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:22,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:44:22,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:22,884 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:44:22,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:44:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5310 backedges. 1763 proven. 3337 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-12-03 17:44:24,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:24,035 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:44:24,035 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:44:24,035 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:44:24,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:24,035 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:44:24,045 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:44:24,045 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:44:24,124 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-12-03 17:44:24,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:44:24,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:44:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5310 backedges. 3134 proven. 457 refuted. 0 times theorem prover too weak. 1719 trivial. 0 not checked. [2018-12-03 17:44:24,503 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:44:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5310 backedges. 3134 proven. 457 refuted. 0 times theorem prover too weak. 1719 trivial. 0 not checked. [2018-12-03 17:44:25,451 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:44:25,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 16, 16] total 64 [2018-12-03 17:44:25,451 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:44:25,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-12-03 17:44:25,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-12-03 17:44:25,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1344, Invalid=2688, Unknown=0, NotChecked=0, Total=4032 [2018-12-03 17:44:25,453 INFO L87 Difference]: Start difference. First operand 183 states and 196 transitions. Second operand 64 states. [2018-12-03 17:44:27,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:44:27,110 INFO L93 Difference]: Finished difference Result 269 states and 310 transitions. [2018-12-03 17:44:27,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-12-03 17:44:27,111 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 182 [2018-12-03 17:44:27,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:44:27,112 INFO L225 Difference]: With dead ends: 269 [2018-12-03 17:44:27,112 INFO L226 Difference]: Without dead ends: 227 [2018-12-03 17:44:27,113 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 323 SyntacticMatches, 26 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4010 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4528, Invalid=10972, Unknown=0, NotChecked=0, Total=15500 [2018-12-03 17:44:27,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-12-03 17:44:27,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 189. [2018-12-03 17:44:27,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-12-03 17:44:27,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 203 transitions. [2018-12-03 17:44:27,201 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 203 transitions. Word has length 182 [2018-12-03 17:44:27,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:44:27,201 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 203 transitions. [2018-12-03 17:44:27,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-12-03 17:44:27,202 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 203 transitions. [2018-12-03 17:44:27,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-12-03 17:44:27,202 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:44:27,202 INFO L402 BasicCegarLoop]: trace histogram [62, 61, 48, 14, 1, 1, 1] [2018-12-03 17:44:27,203 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:44:27,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:44:27,203 INFO L82 PathProgramCache]: Analyzing trace with hash 949440851, now seen corresponding path program 39 times [2018-12-03 17:44:27,203 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:44:27,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:27,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:44:27,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:27,204 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:44:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:44:28,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5673 backedges. 1946 proven. 3480 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-12-03 17:44:28,978 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:28,978 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:44:28,978 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:44:28,978 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:44:28,978 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:28,978 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:44:28,987 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:44:28,987 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:44:29,043 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:44:29,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:44:29,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:44:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5673 backedges. 1946 proven. 3480 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-12-03 17:44:29,082 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:44:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5673 backedges. 1946 proven. 3480 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-12-03 17:44:30,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:44:30,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 51 [2018-12-03 17:44:30,275 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:44:30,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-12-03 17:44:30,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-12-03 17:44:30,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:44:30,276 INFO L87 Difference]: Start difference. First operand 189 states and 203 transitions. Second operand 51 states. [2018-12-03 17:44:30,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:44:30,636 INFO L93 Difference]: Finished difference Result 238 states and 267 transitions. [2018-12-03 17:44:30,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-12-03 17:44:30,637 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 188 [2018-12-03 17:44:30,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:44:30,638 INFO L225 Difference]: With dead ends: 238 [2018-12-03 17:44:30,638 INFO L226 Difference]: Without dead ends: 193 [2018-12-03 17:44:30,639 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 326 SyntacticMatches, 48 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:44:30,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-12-03 17:44:30,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2018-12-03 17:44:30,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-12-03 17:44:30,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 206 transitions. [2018-12-03 17:44:30,727 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 206 transitions. Word has length 188 [2018-12-03 17:44:30,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:44:30,728 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 206 transitions. [2018-12-03 17:44:30,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-12-03 17:44:30,728 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 206 transitions. [2018-12-03 17:44:30,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-12-03 17:44:30,728 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:44:30,729 INFO L402 BasicCegarLoop]: trace histogram [63, 62, 49, 14, 1, 1, 1] [2018-12-03 17:44:30,729 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:44:30,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:44:30,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1540699687, now seen corresponding path program 40 times [2018-12-03 17:44:30,729 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:44:30,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:30,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:44:30,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:30,730 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:44:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:44:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5859 backedges. 1986 proven. 3626 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-12-03 17:44:31,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:31,880 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:44:31,880 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:44:31,880 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:44:31,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:31,880 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:44:31,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:44:31,889 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:44:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:44:31,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:44:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5859 backedges. 1986 proven. 3626 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-12-03 17:44:31,993 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:44:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5859 backedges. 1986 proven. 3626 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-12-03 17:44:33,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:44:33,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 51 [2018-12-03 17:44:33,023 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:44:33,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-12-03 17:44:33,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-12-03 17:44:33,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:44:33,024 INFO L87 Difference]: Start difference. First operand 192 states and 206 transitions. Second operand 52 states. [2018-12-03 17:44:33,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:44:33,358 INFO L93 Difference]: Finished difference Result 252 states and 281 transitions. [2018-12-03 17:44:33,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-12-03 17:44:33,358 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 191 [2018-12-03 17:44:33,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:44:33,360 INFO L225 Difference]: With dead ends: 252 [2018-12-03 17:44:33,360 INFO L226 Difference]: Without dead ends: 207 [2018-12-03 17:44:33,360 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 331 SyntacticMatches, 50 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 17:44:33,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-12-03 17:44:33,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 195. [2018-12-03 17:44:33,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-12-03 17:44:33,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2018-12-03 17:44:33,445 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 191 [2018-12-03 17:44:33,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:44:33,445 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2018-12-03 17:44:33,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-12-03 17:44:33,445 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2018-12-03 17:44:33,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-12-03 17:44:33,446 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:44:33,446 INFO L402 BasicCegarLoop]: trace histogram [64, 63, 50, 14, 1, 1, 1] [2018-12-03 17:44:33,446 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:44:33,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:44:33,447 INFO L82 PathProgramCache]: Analyzing trace with hash 2071802067, now seen corresponding path program 41 times [2018-12-03 17:44:33,447 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:44:33,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:33,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:44:33,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:33,448 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:44:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:44:33,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 3986 proven. 534 refuted. 0 times theorem prover too weak. 1528 trivial. 0 not checked. [2018-12-03 17:44:33,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:33,870 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:44:33,870 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:44:33,870 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:44:33,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:33,870 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:44:33,879 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:44:33,879 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:44:33,960 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-12-03 17:44:33,960 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:44:33,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:44:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 3585 proven. 534 refuted. 0 times theorem prover too weak. 1929 trivial. 0 not checked. [2018-12-03 17:44:33,986 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:44:34,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 3585 proven. 534 refuted. 0 times theorem prover too weak. 1929 trivial. 0 not checked. [2018-12-03 17:44:34,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:44:34,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 21 [2018-12-03 17:44:34,238 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:44:34,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-03 17:44:34,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-03 17:44:34,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-12-03 17:44:34,239 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand 21 states. [2018-12-03 17:44:35,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:44:35,061 INFO L93 Difference]: Finished difference Result 412 states and 500 transitions. [2018-12-03 17:44:35,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-03 17:44:35,061 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 194 [2018-12-03 17:44:35,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:44:35,066 INFO L225 Difference]: With dead ends: 412 [2018-12-03 17:44:35,066 INFO L226 Difference]: Without dead ends: 410 [2018-12-03 17:44:35,066 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 374 SyntacticMatches, 28 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-12-03 17:44:35,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2018-12-03 17:44:35,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 210. [2018-12-03 17:44:35,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-12-03 17:44:35,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 229 transitions. [2018-12-03 17:44:35,200 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 229 transitions. Word has length 194 [2018-12-03 17:44:35,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:44:35,200 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 229 transitions. [2018-12-03 17:44:35,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-03 17:44:35,201 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 229 transitions. [2018-12-03 17:44:35,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-12-03 17:44:35,202 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:44:35,202 INFO L402 BasicCegarLoop]: trace histogram [69, 68, 50, 19, 1, 1, 1] [2018-12-03 17:44:35,202 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:44:35,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:44:35,202 INFO L82 PathProgramCache]: Analyzing trace with hash 610401065, now seen corresponding path program 42 times [2018-12-03 17:44:35,202 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:44:35,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:35,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:44:35,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:35,203 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:44:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:44:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 5974 proven. 1009 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-12-03 17:44:36,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:36,668 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:44:36,668 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:44:36,668 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:44:36,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:36,669 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:44:36,678 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:44:36,678 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:44:36,748 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:44:36,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:44:36,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:44:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 5974 proven. 1009 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-12-03 17:44:36,790 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:44:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 5974 proven. 1009 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-12-03 17:44:37,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:44:37,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 83 [2018-12-03 17:44:37,836 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:44:37,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-12-03 17:44:37,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-12-03 17:44:37,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-12-03 17:44:37,838 INFO L87 Difference]: Start difference. First operand 210 states and 229 transitions. Second operand 53 states. [2018-12-03 17:44:41,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:44:41,688 INFO L93 Difference]: Finished difference Result 2068 states and 2726 transitions. [2018-12-03 17:44:41,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-12-03 17:44:41,688 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 209 [2018-12-03 17:44:41,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:44:41,697 INFO L225 Difference]: With dead ends: 2068 [2018-12-03 17:44:41,697 INFO L226 Difference]: Without dead ends: 2066 [2018-12-03 17:44:41,698 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 367 SyntacticMatches, 38 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4639 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-12-03 17:44:41,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2018-12-03 17:44:42,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 306. [2018-12-03 17:44:42,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2018-12-03 17:44:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 357 transitions. [2018-12-03 17:44:42,245 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 357 transitions. Word has length 209 [2018-12-03 17:44:42,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:44:42,246 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 357 transitions. [2018-12-03 17:44:42,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-12-03 17:44:42,246 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 357 transitions. [2018-12-03 17:44:42,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-12-03 17:44:42,247 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:44:42,247 INFO L402 BasicCegarLoop]: trace histogram [101, 100, 51, 50, 1, 1, 1] [2018-12-03 17:44:42,248 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:44:42,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:44:42,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1270384855, now seen corresponding path program 43 times [2018-12-03 17:44:42,248 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:44:42,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:42,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:44:42,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:44:42,249 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:44:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:44:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 7648 proven. 3876 refuted. 0 times theorem prover too weak. 3626 trivial. 0 not checked. [2018-12-03 17:44:44,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:44,188 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:44:44,188 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:44:44,188 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:44:44,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:44:44,188 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:44:44,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:44:44,196 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:44:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:44:44,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:44:47,623 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:44:47,623 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:44:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:44:51,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:44:51,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 103, 103] total 104 [2018-12-03 17:44:51,067 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:44:51,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-12-03 17:44:51,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-12-03 17:44:51,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1481, Invalid=9231, Unknown=0, NotChecked=0, Total=10712 [2018-12-03 17:44:51,069 INFO L87 Difference]: Start difference. First operand 306 states and 357 transitions. Second operand 104 states. [2018-12-03 17:45:09,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:45:09,083 INFO L93 Difference]: Finished difference Result 4434 states and 5812 transitions. [2018-12-03 17:45:09,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-12-03 17:45:09,084 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 305 [2018-12-03 17:45:09,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:45:09,099 INFO L225 Difference]: With dead ends: 4434 [2018-12-03 17:45:09,100 INFO L226 Difference]: Without dead ends: 4278 [2018-12-03 17:45:09,101 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 509 SyntacticMatches, 52 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1481, Invalid=9231, Unknown=0, NotChecked=0, Total=10712 [2018-12-03 17:45:09,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2018-12-03 17:45:20,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 4180. [2018-12-03 17:45:20,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4180 states. [2018-12-03 17:45:20,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4180 states to 4180 states and 4280 transitions. [2018-12-03 17:45:20,302 INFO L78 Accepts]: Start accepts. Automaton has 4180 states and 4280 transitions. Word has length 305 [2018-12-03 17:45:20,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:45:20,302 INFO L480 AbstractCegarLoop]: Abstraction has 4180 states and 4280 transitions. [2018-12-03 17:45:20,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-12-03 17:45:20,302 INFO L276 IsEmpty]: Start isEmpty. Operand 4180 states and 4280 transitions. [2018-12-03 17:45:20,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-12-03 17:45:20,303 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:45:20,304 INFO L402 BasicCegarLoop]: trace histogram [102, 101, 52, 50, 1, 1, 1] [2018-12-03 17:45:20,304 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:45:20,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:45:20,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1218035091, now seen corresponding path program 44 times [2018-12-03 17:45:20,304 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:45:20,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:45:20,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:45:20,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:45:20,305 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:45:20,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:45:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2018-12-03 17:45:22,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:45:22,301 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:45:22,301 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:45:22,301 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:45:22,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:45:22,301 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:45:22,311 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:45:22,311 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:45:22,565 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 102 check-sat command(s) [2018-12-03 17:45:22,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:45:22,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:45:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2018-12-03 17:45:22,681 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:45:24,636 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2018-12-03 17:45:24,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:45:24,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 53 [2018-12-03 17:45:24,657 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:45:24,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-12-03 17:45:24,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-12-03 17:45:24,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-12-03 17:45:24,659 INFO L87 Difference]: Start difference. First operand 4180 states and 4280 transitions. Second operand 54 states. [2018-12-03 17:45:36,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:45:36,290 INFO L93 Difference]: Finished difference Result 8364 states and 8565 transitions. [2018-12-03 17:45:36,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-12-03 17:45:36,291 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 308 [2018-12-03 17:45:36,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:45:36,304 INFO L225 Difference]: With dead ends: 8364 [2018-12-03 17:45:36,304 INFO L226 Difference]: Without dead ends: 4183 [2018-12-03 17:45:36,310 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 563 SyntacticMatches, 102 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2950 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-12-03 17:45:36,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4183 states. [2018-12-03 17:45:47,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4183 to 4183. [2018-12-03 17:45:47,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4183 states. [2018-12-03 17:45:47,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 4283 transitions. [2018-12-03 17:45:47,730 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 4283 transitions. Word has length 308 [2018-12-03 17:45:47,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:45:47,730 INFO L480 AbstractCegarLoop]: Abstraction has 4183 states and 4283 transitions. [2018-12-03 17:45:47,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-12-03 17:45:47,731 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 4283 transitions. [2018-12-03 17:45:47,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2018-12-03 17:45:47,732 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:45:47,733 INFO L402 BasicCegarLoop]: trace histogram [103, 102, 52, 51, 1, 1, 1] [2018-12-03 17:45:47,733 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:45:47,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:45:47,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1933735527, now seen corresponding path program 45 times [2018-12-03 17:45:47,734 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:45:47,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:45:47,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:45:47,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:45:47,735 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:45:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:45:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 15759 backedges. 11729 proven. 0 refuted. 0 times theorem prover too weak. 4030 trivial. 0 not checked. [2018-12-03 17:45:49,199 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 17:45:49,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2018-12-03 17:45:49,199 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 17:45:49,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-12-03 17:45:49,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-12-03 17:45:49,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-03 17:45:49,201 INFO L87 Difference]: Start difference. First operand 4183 states and 4283 transitions. Second operand 53 states. [2018-12-03 17:45:49,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:45:49,569 INFO L93 Difference]: Finished difference Result 4183 states and 4283 transitions. [2018-12-03 17:45:49,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-12-03 17:45:49,570 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 311 [2018-12-03 17:45:49,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:45:49,570 INFO L225 Difference]: With dead ends: 4183 [2018-12-03 17:45:49,570 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 17:45:49,575 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-03 17:45:49,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 17:45:49,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 17:45:49,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 17:45:49,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 17:45:49,576 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 311 [2018-12-03 17:45:49,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:45:49,576 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 17:45:49,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-12-03 17:45:49,576 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 17:45:49,576 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 17:45:49,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 17:45:54,464 WARN L180 SmtUtils]: Spent 4.87 s on a formula simplification. DAG size of input: 1498 DAG size of output: 1017 [2018-12-03 17:45:58,464 WARN L180 SmtUtils]: Spent 3.99 s on a formula simplification. DAG size of input: 1617 DAG size of output: 922 [2018-12-03 17:46:01,306 WARN L180 SmtUtils]: Spent 2.84 s on a formula simplification. DAG size of input: 1498 DAG size of output: 1017 [2018-12-03 17:46:09,076 WARN L180 SmtUtils]: Spent 7.76 s on a formula simplification. DAG size of input: 968 DAG size of output: 509 [2018-12-03 17:46:18,715 WARN L180 SmtUtils]: Spent 9.63 s on a formula simplification. DAG size of input: 828 DAG size of output: 511 [2018-12-03 17:46:26,229 WARN L180 SmtUtils]: Spent 7.50 s on a formula simplification. DAG size of input: 968 DAG size of output: 509 [2018-12-03 17:46:26,235 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 55) no Hoare annotation was computed. [2018-12-03 17:46:26,235 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 1 55) no Hoare annotation was computed. [2018-12-03 17:46:26,236 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 55) no Hoare annotation was computed. [2018-12-03 17:46:26,239 INFO L444 ceAbstractionStarter]: At program point L22(lines 22 31) the Hoare annotation is: (let ((.cse24 (<= ULTIMATE.start_main_~y~4 15)) (.cse25 (<= 15 ULTIMATE.start_main_~y~4)) (.cse18 (<= 12 ULTIMATE.start_main_~y~4)) (.cse19 (<= ULTIMATE.start_main_~y~4 12)) (.cse2 (<= 16 ULTIMATE.start_main_~y~4)) (.cse3 (<= ULTIMATE.start_main_~y~4 16)) (.cse34 (<= 20 ULTIMATE.start_main_~y~4)) (.cse35 (<= ULTIMATE.start_main_~y~4 20)) (.cse33 (<= ULTIMATE.start_main_~y~4 2)) (.cse32 (<= 2 ULTIMATE.start_main_~y~4)) (.cse59 (<= ULTIMATE.start_main_~y~4 13)) (.cse58 (<= 13 ULTIMATE.start_main_~y~4)) (.cse0 (<= 37 ULTIMATE.start_main_~y~4)) (.cse1 (<= ULTIMATE.start_main_~y~4 37)) (.cse38 (<= ULTIMATE.start_main_~y~4 26)) (.cse39 (<= 26 ULTIMATE.start_main_~y~4)) (.cse56 (<= ULTIMATE.start_main_~y~4 48)) (.cse57 (<= 48 ULTIMATE.start_main_~y~4)) (.cse67 (<= ULTIMATE.start_main_~y~4 33)) (.cse66 (<= 33 ULTIMATE.start_main_~y~4)) (.cse20 (<= ULTIMATE.start_main_~y~4 9)) (.cse21 (<= 9 ULTIMATE.start_main_~y~4)) (.cse52 (<= ULTIMATE.start_main_~y~4 0)) (.cse53 (<= 0 ULTIMATE.start_main_~y~4)) (.cse86 (<= ULTIMATE.start_main_~y~4 30)) (.cse87 (<= 30 ULTIMATE.start_main_~y~4)) (.cse72 (<= ULTIMATE.start_main_~y~4 22)) (.cse73 (<= 22 ULTIMATE.start_main_~y~4)) (.cse9 (<= 39 ULTIMATE.start_main_~y~4)) (.cse8 (<= ULTIMATE.start_main_~y~4 39)) (.cse30 (<= 25 ULTIMATE.start_main_~y~4)) (.cse31 (<= ULTIMATE.start_main_~y~4 25)) (.cse6 (<= ULTIMATE.start_main_~y~4 7)) (.cse7 (<= 7 ULTIMATE.start_main_~y~4)) (.cse45 (<= ULTIMATE.start_main_~y~4 45)) (.cse44 (<= 45 ULTIMATE.start_main_~y~4)) (.cse68 (<= ULTIMATE.start_main_~y~4 28)) (.cse69 (<= 28 ULTIMATE.start_main_~y~4)) (.cse82 (<= 4 ULTIMATE.start_main_~y~4)) (.cse83 (<= ULTIMATE.start_main_~y~4 4)) (.cse48 (<= 31 ULTIMATE.start_main_~y~4)) (.cse49 (<= ULTIMATE.start_main_~y~4 31)) (.cse15 (<= 23 ULTIMATE.start_main_~y~4)) (.cse14 (<= ULTIMATE.start_main_~y~4 23)) (.cse91 (<= 46 ULTIMATE.start_main_~y~4)) (.cse90 (<= ULTIMATE.start_main_~y~4 46)) (.cse40 (<= ULTIMATE.start_main_~y~4 3)) (.cse41 (<= 3 ULTIMATE.start_main_~y~4)) (.cse84 (<= ULTIMATE.start_main_~y~4 24)) (.cse85 (<= 24 ULTIMATE.start_main_~y~4)) (.cse62 (<= 41 ULTIMATE.start_main_~y~4)) (.cse63 (<= ULTIMATE.start_main_~y~4 41)) (.cse71 (<= 43 ULTIMATE.start_main_~y~4)) (.cse70 (<= ULTIMATE.start_main_~y~4 43)) (.cse81 (<= ULTIMATE.start_main_~y~4 35)) (.cse80 (<= 35 ULTIMATE.start_main_~y~4)) (.cse78 (<= 36 ULTIMATE.start_main_~y~4)) (.cse79 (<= ULTIMATE.start_main_~y~4 36)) (.cse28 (<= 34 ULTIMATE.start_main_~y~4)) (.cse29 (<= ULTIMATE.start_main_~y~4 34)) (.cse50 (<= 40 ULTIMATE.start_main_~y~4)) (.cse51 (<= ULTIMATE.start_main_~y~4 40)) (.cse74 (<= ULTIMATE.start_main_~y~4 1)) (.cse75 (<= 1 ULTIMATE.start_main_~y~4)) (.cse10 (<= 19 ULTIMATE.start_main_~y~4)) (.cse11 (<= ULTIMATE.start_main_~y~4 19)) (.cse26 (<= 8 ULTIMATE.start_main_~y~4)) (.cse27 (<= ULTIMATE.start_main_~y~4 8)) (.cse92 (<= 14 ULTIMATE.start_main_~y~4)) (.cse93 (<= ULTIMATE.start_main_~y~4 14)) (.cse23 (<= 11 ULTIMATE.start_main_~y~4)) (.cse22 (<= ULTIMATE.start_main_~y~4 11)) (.cse46 (<= ULTIMATE.start_main_~y~4 10)) (.cse47 (<= 10 ULTIMATE.start_main_~y~4)) (.cse95 (<= ULTIMATE.start_main_~y~4 42)) (.cse94 (<= 42 ULTIMATE.start_main_~y~4)) (.cse54 (<= 47 ULTIMATE.start_main_~y~4)) (.cse55 (<= ULTIMATE.start_main_~y~4 47)) (.cse4 (<= 17 ULTIMATE.start_main_~y~4)) (.cse5 (<= ULTIMATE.start_main_~y~4 17)) (.cse12 (<= ULTIMATE.start_main_~y~4 27)) (.cse13 (<= 27 ULTIMATE.start_main_~y~4)) (.cse99 (<= 49 ULTIMATE.start_main_~y~4)) (.cse98 (<= ULTIMATE.start_main_~y~4 49)) (.cse60 (<= 6 ULTIMATE.start_main_~y~4)) (.cse61 (<= ULTIMATE.start_main_~y~4 6)) (.cse36 (<= ULTIMATE.start_main_~y~4 38)) (.cse37 (<= 38 ULTIMATE.start_main_~y~4)) (.cse77 (<= ULTIMATE.start_main_~y~4 5)) (.cse76 (<= 5 ULTIMATE.start_main_~y~4)) (.cse97 (<= 32 ULTIMATE.start_main_~y~4)) (.cse96 (<= ULTIMATE.start_main_~y~4 32)) (.cse64 (<= 21 ULTIMATE.start_main_~y~4)) (.cse65 (<= ULTIMATE.start_main_~y~4 21)) (.cse88 (<= ULTIMATE.start_main_~y~4 44)) (.cse89 (<= 44 ULTIMATE.start_main_~y~4)) (.cse16 (<= ULTIMATE.start_main_~y~4 29)) (.cse17 (<= 29 ULTIMATE.start_main_~y~4)) (.cse43 (<= ULTIMATE.start_main_~y~4 18)) (.cse42 (<= 18 ULTIMATE.start_main_~y~4))) (or (and .cse0 (<= 63 ULTIMATE.start_main_~x~4) .cse1 (<= ULTIMATE.start_main_~x~4 63)) (and (<= ULTIMATE.start_main_~x~4 16) .cse2 (<= 16 ULTIMATE.start_main_~x~4) .cse3) (and .cse4 .cse5 (<= ULTIMATE.start_main_~x~4 17) (<= 17 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 7) .cse6 .cse7 (<= 7 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 39) .cse8 .cse9 (<= 39 ULTIMATE.start_main_~x~4)) (and (<= 19 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 19) .cse10 .cse11) (and .cse12 .cse13 (<= ULTIMATE.start_main_~x~4 73) (<= 73 ULTIMATE.start_main_~x~4)) (and .cse14 .cse15 (<= ULTIMATE.start_main_~x~4 23) (<= 23 ULTIMATE.start_main_~x~4)) (and (<= 71 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 71) .cse16 .cse17) (and .cse18 (<= 88 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 88) .cse19) (and (<= ULTIMATE.start_main_~x~4 91) .cse20 .cse21 (<= 91 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 11) (<= 11 ULTIMATE.start_main_~x~4) .cse22 .cse23) (and .cse24 .cse25 (<= 85 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 85)) (and (<= ULTIMATE.start_main_~x~4 8) .cse26 .cse27 (<= 8 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 34) .cse28 (<= 34 ULTIMATE.start_main_~x~4) .cse29) (and (<= ULTIMATE.start_main_~x~4 75) .cse30 (<= 75 ULTIMATE.start_main_~x~4) .cse31) (and .cse32 (<= ULTIMATE.start_main_~x~4 98) .cse33 (<= 98 ULTIMATE.start_main_~x~4)) (and .cse34 (<= ULTIMATE.start_main_~x~4 80) (<= 80 ULTIMATE.start_main_~x~4) .cse35) (and (<= ULTIMATE.start_main_~x~4 62) .cse36 (<= 62 ULTIMATE.start_main_~x~4) .cse37) (and (<= 74 ULTIMATE.start_main_~x~4) .cse38 (<= ULTIMATE.start_main_~x~4 74) .cse39) (and .cse40 (<= 97 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 97) .cse41) (and .cse24 (<= 15 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 15) .cse25) (and (<= 12 ULTIMATE.start_main_~x~4) .cse18 .cse19 (<= ULTIMATE.start_main_~x~4 12)) (and .cse42 (<= 18 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 18) .cse43) (and .cse44 (<= 55 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 55) .cse45) (and (<= 10 ULTIMATE.start_main_~x~4) .cse46 (<= ULTIMATE.start_main_~x~4 10) .cse47) (and (<= 69 ULTIMATE.start_main_~x~4) .cse48 (<= ULTIMATE.start_main_~x~4 69) .cse49) (and (<= ULTIMATE.start_main_~x~4 50) (<= ULTIMATE.start_main_~y~4 50) (<= 50 ULTIMATE.start_main_~x~4) (<= 50 ULTIMATE.start_main_~y~4)) (and .cse50 (<= 60 ULTIMATE.start_main_~x~4) .cse51 (<= ULTIMATE.start_main_~x~4 60)) (and .cse52 .cse53 (<= ULTIMATE.start_main_~x~4 0) (<= 0 ULTIMATE.start_main_~x~4)) (and (<= 47 ULTIMATE.start_main_~x~4) .cse54 (<= ULTIMATE.start_main_~x~4 47) .cse55) (and (<= ULTIMATE.start_main_~x~4 52) (<= 52 ULTIMATE.start_main_~x~4) .cse56 .cse57) (and .cse2 (<= ULTIMATE.start_main_~x~4 84) .cse3 (<= 84 ULTIMATE.start_main_~x~4)) (and .cse58 .cse59 (<= ULTIMATE.start_main_~x~4 87) (<= 87 ULTIMATE.start_main_~x~4)) (and (<= 6 ULTIMATE.start_main_~x~4) .cse60 .cse61 (<= ULTIMATE.start_main_~x~4 6)) (and (<= 41 ULTIMATE.start_main_~x~4) .cse62 (<= ULTIMATE.start_main_~x~4 41) .cse63) (and (<= 20 ULTIMATE.start_main_~x~4) .cse34 .cse35 (<= ULTIMATE.start_main_~x~4 20)) (and (<= 79 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 79) .cse64 .cse65) (and (<= ULTIMATE.start_main_~x~4 33) .cse66 (<= 33 ULTIMATE.start_main_~x~4) .cse67) (and (<= 28 ULTIMATE.start_main_~x~4) .cse68 (<= ULTIMATE.start_main_~x~4 28) .cse69) (and (<= 57 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 57) .cse70 .cse71) (and .cse33 .cse32 (<= 2 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 2)) (and (<= 13 ULTIMATE.start_main_~x~4) .cse59 .cse58 (<= ULTIMATE.start_main_~x~4 13)) (and .cse0 (<= ULTIMATE.start_main_~x~4 37) .cse1 (<= 37 ULTIMATE.start_main_~x~4)) (and .cse72 .cse73 (<= ULTIMATE.start_main_~x~4 78) (<= 78 ULTIMATE.start_main_~x~4)) (and (<= 26 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 26) .cse38 .cse39) (and (<= ULTIMATE.start_main_~x~4 1) .cse74 .cse75 (<= 1 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 5) .cse76 .cse77 (<= 5 ULTIMATE.start_main_~x~4)) (and .cse56 (<= ULTIMATE.start_main_~x~4 48) (<= 48 ULTIMATE.start_main_~x~4) .cse57) (and (<= 67 ULTIMATE.start_main_~x~4) .cse67 .cse66 (<= ULTIMATE.start_main_~x~4 67)) (and (<= ULTIMATE.start_main_~x~4 36) .cse78 (<= 36 ULTIMATE.start_main_~x~4) .cse79) (and .cse80 .cse81 (<= 65 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 65)) (and .cse20 (<= 9 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 9) .cse21) (and .cse82 (<= ULTIMATE.start_main_~x~4 96) (<= 96 ULTIMATE.start_main_~x~4) .cse83) (and (<= ULTIMATE.start_main_~x~4 76) .cse84 .cse85 (<= 76 ULTIMATE.start_main_~x~4)) (and .cse86 .cse87 (<= ULTIMATE.start_main_~x~4 30) (<= 30 ULTIMATE.start_main_~x~4)) (and .cse52 .cse53 (<= ULTIMATE.start_main_~x~4 100) (<= 100 ULTIMATE.start_main_~x~4)) (and .cse86 (<= ULTIMATE.start_main_~x~4 70) (<= 70 ULTIMATE.start_main_~x~4) .cse87) (and .cse72 (<= ULTIMATE.start_main_~x~4 22) (<= 22 ULTIMATE.start_main_~x~4) .cse73) (and (<= 61 ULTIMATE.start_main_~x~4) .cse9 (<= ULTIMATE.start_main_~x~4 61) .cse8) (and .cse30 .cse31 (<= ULTIMATE.start_main_~x~4 25) (<= 25 ULTIMATE.start_main_~x~4)) (and .cse6 .cse7 (<= ULTIMATE.start_main_~x~4 93) (<= 93 ULTIMATE.start_main_~x~4)) (and .cse45 (<= ULTIMATE.start_main_~x~4 45) .cse44 (<= 45 ULTIMATE.start_main_~x~4)) (and (<= 72 ULTIMATE.start_main_~x~4) .cse68 (<= ULTIMATE.start_main_~x~4 72) .cse69) (and .cse82 (<= ULTIMATE.start_main_~x~4 4) (<= 4 ULTIMATE.start_main_~x~4) .cse83) (and (<= 56 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 56) .cse88 .cse89) (and (<= ULTIMATE.start_main_~x~4 31) .cse48 .cse49 (<= 31 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 54) .cse90 (<= 54 ULTIMATE.start_main_~x~4) .cse91) (and (<= ULTIMATE.start_main_~x~4 77) .cse15 (<= 77 ULTIMATE.start_main_~x~4) .cse14) (and (<= ULTIMATE.start_main_~x~4 46) .cse91 (<= 46 ULTIMATE.start_main_~x~4) .cse90) (and (<= 3 ULTIMATE.start_main_~x~4) .cse40 .cse41 (<= ULTIMATE.start_main_~x~4 3)) (and .cse84 .cse85 (<= ULTIMATE.start_main_~x~4 24) (<= 24 ULTIMATE.start_main_~x~4)) (and .cse62 (<= ULTIMATE.start_main_~x~4 59) .cse63 (<= 59 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 43) (<= 43 ULTIMATE.start_main_~x~4) .cse71 .cse70) (and (<= 86 ULTIMATE.start_main_~x~4) .cse92 .cse93 (<= ULTIMATE.start_main_~x~4 86)) (and (<= ULTIMATE.start_main_~x~4 35) .cse81 .cse80 (<= 35 ULTIMATE.start_main_~x~4)) (and .cse78 (<= ULTIMATE.start_main_~x~4 64) .cse79 (<= 64 ULTIMATE.start_main_~x~4)) (and (<= 66 ULTIMATE.start_main_~x~4) .cse28 (<= ULTIMATE.start_main_~x~4 66) .cse29) (and .cse94 (<= 58 ULTIMATE.start_main_~x~4) .cse95 (<= ULTIMATE.start_main_~x~4 58)) (and .cse50 (<= ULTIMATE.start_main_~x~4 40) .cse51 (<= 40 ULTIMATE.start_main_~x~4)) (and (<= 32 ULTIMATE.start_main_~x~4) .cse96 (<= ULTIMATE.start_main_~x~4 32) .cse97) (and (<= 99 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 99) .cse74 .cse75) (and .cse10 (<= ULTIMATE.start_main_~x~4 81) (<= 81 ULTIMATE.start_main_~x~4) .cse11) (and (<= 51 ULTIMATE.start_main_~x~4) .cse98 (<= ULTIMATE.start_main_~x~4 51) .cse99) (and (<= ULTIMATE.start_main_~x~4 92) .cse26 .cse27 (<= 92 ULTIMATE.start_main_~x~4)) (and .cse92 (<= 14 ULTIMATE.start_main_~x~4) .cse93 (<= ULTIMATE.start_main_~x~4 14)) (and .cse23 (<= ULTIMATE.start_main_~x~4 89) (<= 89 ULTIMATE.start_main_~x~4) .cse22) (and .cse46 (<= ULTIMATE.start_main_~x~4 90) (<= 90 ULTIMATE.start_main_~x~4) .cse47) (and .cse95 .cse94 (<= ULTIMATE.start_main_~x~4 42) (<= 42 ULTIMATE.start_main_~x~4)) (and .cse54 (<= 53 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 53) .cse55) (and (<= 83 ULTIMATE.start_main_~x~4) .cse4 .cse5 (<= ULTIMATE.start_main_~x~4 83)) (and .cse12 (<= ULTIMATE.start_main_~x~4 27) .cse13 (<= 27 ULTIMATE.start_main_~x~4)) (and (<= 49 ULTIMATE.start_main_~x~4) .cse99 .cse98 (<= ULTIMATE.start_main_~x~4 49)) (and .cse60 .cse61 (<= ULTIMATE.start_main_~x~4 94) (<= 94 ULTIMATE.start_main_~x~4)) (and (<= 38 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 38) .cse36 .cse37) (and .cse77 (<= 95 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 95) .cse76) (and (<= ULTIMATE.start_main_~x~4 68) (<= 68 ULTIMATE.start_main_~x~4) .cse97 .cse96) (and (<= 21 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 21) .cse64 .cse65) (and (<= ULTIMATE.start_main_~x~4 44) (<= 44 ULTIMATE.start_main_~x~4) .cse88 .cse89) (and (<= 29 ULTIMATE.start_main_~x~4) .cse16 .cse17 (<= ULTIMATE.start_main_~x~4 29)) (and (<= ULTIMATE.start_main_~x~4 82) (<= 82 ULTIMATE.start_main_~x~4) .cse43 .cse42))) [2018-12-03 17:46:26,242 INFO L444 ceAbstractionStarter]: At program point L52(lines 18 52) the Hoare annotation is: (let ((.cse24 (<= ULTIMATE.start_main_~y~4 15)) (.cse25 (<= 15 ULTIMATE.start_main_~y~4)) (.cse18 (<= 12 ULTIMATE.start_main_~y~4)) (.cse19 (<= ULTIMATE.start_main_~y~4 12)) (.cse2 (<= 16 ULTIMATE.start_main_~y~4)) (.cse3 (<= ULTIMATE.start_main_~y~4 16)) (.cse34 (<= 20 ULTIMATE.start_main_~y~4)) (.cse35 (<= ULTIMATE.start_main_~y~4 20)) (.cse33 (<= ULTIMATE.start_main_~y~4 2)) (.cse32 (<= 2 ULTIMATE.start_main_~y~4)) (.cse59 (<= ULTIMATE.start_main_~y~4 13)) (.cse58 (<= 13 ULTIMATE.start_main_~y~4)) (.cse0 (<= 37 ULTIMATE.start_main_~y~4)) (.cse1 (<= ULTIMATE.start_main_~y~4 37)) (.cse38 (<= ULTIMATE.start_main_~y~4 26)) (.cse39 (<= 26 ULTIMATE.start_main_~y~4)) (.cse56 (<= ULTIMATE.start_main_~y~4 48)) (.cse57 (<= 48 ULTIMATE.start_main_~y~4)) (.cse67 (<= ULTIMATE.start_main_~y~4 33)) (.cse66 (<= 33 ULTIMATE.start_main_~y~4)) (.cse20 (<= ULTIMATE.start_main_~y~4 9)) (.cse21 (<= 9 ULTIMATE.start_main_~y~4)) (.cse52 (<= ULTIMATE.start_main_~y~4 0)) (.cse53 (<= 0 ULTIMATE.start_main_~y~4)) (.cse86 (<= ULTIMATE.start_main_~y~4 30)) (.cse87 (<= 30 ULTIMATE.start_main_~y~4)) (.cse72 (<= ULTIMATE.start_main_~y~4 22)) (.cse73 (<= 22 ULTIMATE.start_main_~y~4)) (.cse9 (<= 39 ULTIMATE.start_main_~y~4)) (.cse8 (<= ULTIMATE.start_main_~y~4 39)) (.cse30 (<= 25 ULTIMATE.start_main_~y~4)) (.cse31 (<= ULTIMATE.start_main_~y~4 25)) (.cse6 (<= ULTIMATE.start_main_~y~4 7)) (.cse7 (<= 7 ULTIMATE.start_main_~y~4)) (.cse45 (<= ULTIMATE.start_main_~y~4 45)) (.cse44 (<= 45 ULTIMATE.start_main_~y~4)) (.cse68 (<= ULTIMATE.start_main_~y~4 28)) (.cse69 (<= 28 ULTIMATE.start_main_~y~4)) (.cse82 (<= 4 ULTIMATE.start_main_~y~4)) (.cse83 (<= ULTIMATE.start_main_~y~4 4)) (.cse48 (<= 31 ULTIMATE.start_main_~y~4)) (.cse49 (<= ULTIMATE.start_main_~y~4 31)) (.cse15 (<= 23 ULTIMATE.start_main_~y~4)) (.cse14 (<= ULTIMATE.start_main_~y~4 23)) (.cse91 (<= 46 ULTIMATE.start_main_~y~4)) (.cse90 (<= ULTIMATE.start_main_~y~4 46)) (.cse40 (<= ULTIMATE.start_main_~y~4 3)) (.cse41 (<= 3 ULTIMATE.start_main_~y~4)) (.cse84 (<= ULTIMATE.start_main_~y~4 24)) (.cse85 (<= 24 ULTIMATE.start_main_~y~4)) (.cse62 (<= 41 ULTIMATE.start_main_~y~4)) (.cse63 (<= ULTIMATE.start_main_~y~4 41)) (.cse71 (<= 43 ULTIMATE.start_main_~y~4)) (.cse70 (<= ULTIMATE.start_main_~y~4 43)) (.cse81 (<= ULTIMATE.start_main_~y~4 35)) (.cse80 (<= 35 ULTIMATE.start_main_~y~4)) (.cse78 (<= 36 ULTIMATE.start_main_~y~4)) (.cse79 (<= ULTIMATE.start_main_~y~4 36)) (.cse28 (<= 34 ULTIMATE.start_main_~y~4)) (.cse29 (<= ULTIMATE.start_main_~y~4 34)) (.cse50 (<= 40 ULTIMATE.start_main_~y~4)) (.cse51 (<= ULTIMATE.start_main_~y~4 40)) (.cse74 (<= ULTIMATE.start_main_~y~4 1)) (.cse75 (<= 1 ULTIMATE.start_main_~y~4)) (.cse10 (<= 19 ULTIMATE.start_main_~y~4)) (.cse11 (<= ULTIMATE.start_main_~y~4 19)) (.cse26 (<= 8 ULTIMATE.start_main_~y~4)) (.cse27 (<= ULTIMATE.start_main_~y~4 8)) (.cse92 (<= 14 ULTIMATE.start_main_~y~4)) (.cse93 (<= ULTIMATE.start_main_~y~4 14)) (.cse23 (<= 11 ULTIMATE.start_main_~y~4)) (.cse22 (<= ULTIMATE.start_main_~y~4 11)) (.cse46 (<= ULTIMATE.start_main_~y~4 10)) (.cse47 (<= 10 ULTIMATE.start_main_~y~4)) (.cse95 (<= ULTIMATE.start_main_~y~4 42)) (.cse94 (<= 42 ULTIMATE.start_main_~y~4)) (.cse54 (<= 47 ULTIMATE.start_main_~y~4)) (.cse55 (<= ULTIMATE.start_main_~y~4 47)) (.cse4 (<= 17 ULTIMATE.start_main_~y~4)) (.cse5 (<= ULTIMATE.start_main_~y~4 17)) (.cse12 (<= ULTIMATE.start_main_~y~4 27)) (.cse13 (<= 27 ULTIMATE.start_main_~y~4)) (.cse99 (<= 49 ULTIMATE.start_main_~y~4)) (.cse98 (<= ULTIMATE.start_main_~y~4 49)) (.cse60 (<= 6 ULTIMATE.start_main_~y~4)) (.cse61 (<= ULTIMATE.start_main_~y~4 6)) (.cse36 (<= ULTIMATE.start_main_~y~4 38)) (.cse37 (<= 38 ULTIMATE.start_main_~y~4)) (.cse77 (<= ULTIMATE.start_main_~y~4 5)) (.cse76 (<= 5 ULTIMATE.start_main_~y~4)) (.cse97 (<= 32 ULTIMATE.start_main_~y~4)) (.cse96 (<= ULTIMATE.start_main_~y~4 32)) (.cse64 (<= 21 ULTIMATE.start_main_~y~4)) (.cse65 (<= ULTIMATE.start_main_~y~4 21)) (.cse88 (<= ULTIMATE.start_main_~y~4 44)) (.cse89 (<= 44 ULTIMATE.start_main_~y~4)) (.cse16 (<= ULTIMATE.start_main_~y~4 29)) (.cse17 (<= 29 ULTIMATE.start_main_~y~4)) (.cse43 (<= ULTIMATE.start_main_~y~4 18)) (.cse42 (<= 18 ULTIMATE.start_main_~y~4))) (or (and .cse0 (<= 63 ULTIMATE.start_main_~x~4) .cse1 (<= ULTIMATE.start_main_~x~4 63)) (and (<= ULTIMATE.start_main_~x~4 16) .cse2 (<= 16 ULTIMATE.start_main_~x~4) .cse3) (and .cse4 .cse5 (<= ULTIMATE.start_main_~x~4 17) (<= 17 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 7) .cse6 .cse7 (<= 7 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 39) .cse8 .cse9 (<= 39 ULTIMATE.start_main_~x~4)) (and (<= 19 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 19) .cse10 .cse11) (and .cse12 .cse13 (<= ULTIMATE.start_main_~x~4 73) (<= 73 ULTIMATE.start_main_~x~4)) (and .cse14 .cse15 (<= ULTIMATE.start_main_~x~4 23) (<= 23 ULTIMATE.start_main_~x~4)) (and (<= 71 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 71) .cse16 .cse17) (and .cse18 (<= 88 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 88) .cse19) (and (<= ULTIMATE.start_main_~x~4 91) .cse20 .cse21 (<= 91 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 11) (<= 11 ULTIMATE.start_main_~x~4) .cse22 .cse23) (and .cse24 .cse25 (<= 85 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 85)) (and (<= ULTIMATE.start_main_~x~4 8) .cse26 .cse27 (<= 8 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 34) .cse28 (<= 34 ULTIMATE.start_main_~x~4) .cse29) (and (<= ULTIMATE.start_main_~x~4 75) .cse30 (<= 75 ULTIMATE.start_main_~x~4) .cse31) (and .cse32 (<= ULTIMATE.start_main_~x~4 98) .cse33 (<= 98 ULTIMATE.start_main_~x~4)) (and .cse34 (<= ULTIMATE.start_main_~x~4 80) (<= 80 ULTIMATE.start_main_~x~4) .cse35) (and (<= ULTIMATE.start_main_~x~4 62) .cse36 (<= 62 ULTIMATE.start_main_~x~4) .cse37) (and (<= 74 ULTIMATE.start_main_~x~4) .cse38 (<= ULTIMATE.start_main_~x~4 74) .cse39) (and .cse40 (<= 97 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 97) .cse41) (and .cse24 (<= 15 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 15) .cse25) (and (<= 12 ULTIMATE.start_main_~x~4) .cse18 .cse19 (<= ULTIMATE.start_main_~x~4 12)) (and .cse42 (<= 18 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 18) .cse43) (and .cse44 (<= 55 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 55) .cse45) (and (<= 10 ULTIMATE.start_main_~x~4) .cse46 (<= ULTIMATE.start_main_~x~4 10) .cse47) (and (<= 69 ULTIMATE.start_main_~x~4) .cse48 (<= ULTIMATE.start_main_~x~4 69) .cse49) (and (<= ULTIMATE.start_main_~x~4 50) (<= ULTIMATE.start_main_~y~4 50) (<= 50 ULTIMATE.start_main_~x~4) (<= 50 ULTIMATE.start_main_~y~4)) (and .cse50 (<= 60 ULTIMATE.start_main_~x~4) .cse51 (<= ULTIMATE.start_main_~x~4 60)) (and .cse52 .cse53 (<= ULTIMATE.start_main_~x~4 0) (<= 0 ULTIMATE.start_main_~x~4)) (and (<= 47 ULTIMATE.start_main_~x~4) .cse54 (<= ULTIMATE.start_main_~x~4 47) .cse55) (and (<= ULTIMATE.start_main_~x~4 52) (<= 52 ULTIMATE.start_main_~x~4) .cse56 .cse57) (and .cse2 (<= ULTIMATE.start_main_~x~4 84) .cse3 (<= 84 ULTIMATE.start_main_~x~4)) (and .cse58 .cse59 (<= ULTIMATE.start_main_~x~4 87) (<= 87 ULTIMATE.start_main_~x~4)) (and (<= 6 ULTIMATE.start_main_~x~4) .cse60 .cse61 (<= ULTIMATE.start_main_~x~4 6)) (and (<= 41 ULTIMATE.start_main_~x~4) .cse62 (<= ULTIMATE.start_main_~x~4 41) .cse63) (and (<= 20 ULTIMATE.start_main_~x~4) .cse34 .cse35 (<= ULTIMATE.start_main_~x~4 20)) (and (<= 79 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 79) .cse64 .cse65) (and (<= ULTIMATE.start_main_~x~4 33) .cse66 (<= 33 ULTIMATE.start_main_~x~4) .cse67) (and (<= 28 ULTIMATE.start_main_~x~4) .cse68 (<= ULTIMATE.start_main_~x~4 28) .cse69) (and (<= 57 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 57) .cse70 .cse71) (and .cse33 .cse32 (<= 2 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 2)) (and (<= 13 ULTIMATE.start_main_~x~4) .cse59 .cse58 (<= ULTIMATE.start_main_~x~4 13)) (and .cse0 (<= ULTIMATE.start_main_~x~4 37) .cse1 (<= 37 ULTIMATE.start_main_~x~4)) (and .cse72 .cse73 (<= ULTIMATE.start_main_~x~4 78) (<= 78 ULTIMATE.start_main_~x~4)) (and (<= 26 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 26) .cse38 .cse39) (and (<= ULTIMATE.start_main_~x~4 1) .cse74 .cse75 (<= 1 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 5) .cse76 .cse77 (<= 5 ULTIMATE.start_main_~x~4)) (and .cse56 (<= ULTIMATE.start_main_~x~4 48) (<= 48 ULTIMATE.start_main_~x~4) .cse57) (and (<= 67 ULTIMATE.start_main_~x~4) .cse67 .cse66 (<= ULTIMATE.start_main_~x~4 67)) (and (<= ULTIMATE.start_main_~x~4 36) .cse78 (<= 36 ULTIMATE.start_main_~x~4) .cse79) (and .cse80 .cse81 (<= 65 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 65)) (and .cse20 (<= 9 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 9) .cse21) (and .cse82 (<= ULTIMATE.start_main_~x~4 96) (<= 96 ULTIMATE.start_main_~x~4) .cse83) (and (<= ULTIMATE.start_main_~x~4 76) .cse84 .cse85 (<= 76 ULTIMATE.start_main_~x~4)) (and .cse86 .cse87 (<= ULTIMATE.start_main_~x~4 30) (<= 30 ULTIMATE.start_main_~x~4)) (and .cse52 .cse53 (<= ULTIMATE.start_main_~x~4 100) (<= 100 ULTIMATE.start_main_~x~4)) (and .cse86 (<= ULTIMATE.start_main_~x~4 70) (<= 70 ULTIMATE.start_main_~x~4) .cse87) (and .cse72 (<= ULTIMATE.start_main_~x~4 22) (<= 22 ULTIMATE.start_main_~x~4) .cse73) (and (<= 61 ULTIMATE.start_main_~x~4) .cse9 (<= ULTIMATE.start_main_~x~4 61) .cse8) (and .cse30 .cse31 (<= ULTIMATE.start_main_~x~4 25) (<= 25 ULTIMATE.start_main_~x~4)) (and .cse6 .cse7 (<= ULTIMATE.start_main_~x~4 93) (<= 93 ULTIMATE.start_main_~x~4)) (and .cse45 (<= ULTIMATE.start_main_~x~4 45) .cse44 (<= 45 ULTIMATE.start_main_~x~4)) (and (<= 72 ULTIMATE.start_main_~x~4) .cse68 (<= ULTIMATE.start_main_~x~4 72) .cse69) (and .cse82 (<= ULTIMATE.start_main_~x~4 4) (<= 4 ULTIMATE.start_main_~x~4) .cse83) (and (<= 56 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 56) .cse88 .cse89) (and (<= ULTIMATE.start_main_~x~4 31) .cse48 .cse49 (<= 31 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 54) .cse90 (<= 54 ULTIMATE.start_main_~x~4) .cse91) (and (<= ULTIMATE.start_main_~x~4 77) .cse15 (<= 77 ULTIMATE.start_main_~x~4) .cse14) (and (<= ULTIMATE.start_main_~x~4 46) .cse91 (<= 46 ULTIMATE.start_main_~x~4) .cse90) (and (<= 3 ULTIMATE.start_main_~x~4) .cse40 .cse41 (<= ULTIMATE.start_main_~x~4 3)) (and .cse84 .cse85 (<= ULTIMATE.start_main_~x~4 24) (<= 24 ULTIMATE.start_main_~x~4)) (and .cse62 (<= ULTIMATE.start_main_~x~4 59) .cse63 (<= 59 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 43) (<= 43 ULTIMATE.start_main_~x~4) .cse71 .cse70) (and (<= 86 ULTIMATE.start_main_~x~4) .cse92 .cse93 (<= ULTIMATE.start_main_~x~4 86)) (and (<= ULTIMATE.start_main_~x~4 35) .cse81 .cse80 (<= 35 ULTIMATE.start_main_~x~4)) (and .cse78 (<= ULTIMATE.start_main_~x~4 64) .cse79 (<= 64 ULTIMATE.start_main_~x~4)) (and (<= 66 ULTIMATE.start_main_~x~4) .cse28 (<= ULTIMATE.start_main_~x~4 66) .cse29) (and .cse94 (<= 58 ULTIMATE.start_main_~x~4) .cse95 (<= ULTIMATE.start_main_~x~4 58)) (and .cse50 (<= ULTIMATE.start_main_~x~4 40) .cse51 (<= 40 ULTIMATE.start_main_~x~4)) (and (<= 32 ULTIMATE.start_main_~x~4) .cse96 (<= ULTIMATE.start_main_~x~4 32) .cse97) (and (<= 99 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 99) .cse74 .cse75) (and .cse10 (<= ULTIMATE.start_main_~x~4 81) (<= 81 ULTIMATE.start_main_~x~4) .cse11) (and (<= 51 ULTIMATE.start_main_~x~4) .cse98 (<= ULTIMATE.start_main_~x~4 51) .cse99) (and (<= ULTIMATE.start_main_~x~4 92) .cse26 .cse27 (<= 92 ULTIMATE.start_main_~x~4)) (and .cse92 (<= 14 ULTIMATE.start_main_~x~4) .cse93 (<= ULTIMATE.start_main_~x~4 14)) (and .cse23 (<= ULTIMATE.start_main_~x~4 89) (<= 89 ULTIMATE.start_main_~x~4) .cse22) (and .cse46 (<= ULTIMATE.start_main_~x~4 90) (<= 90 ULTIMATE.start_main_~x~4) .cse47) (and .cse95 .cse94 (<= ULTIMATE.start_main_~x~4 42) (<= 42 ULTIMATE.start_main_~x~4)) (and .cse54 (<= 53 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 53) .cse55) (and (<= 83 ULTIMATE.start_main_~x~4) .cse4 .cse5 (<= ULTIMATE.start_main_~x~4 83)) (and .cse12 (<= ULTIMATE.start_main_~x~4 27) .cse13 (<= 27 ULTIMATE.start_main_~x~4)) (and (<= 49 ULTIMATE.start_main_~x~4) .cse99 .cse98 (<= ULTIMATE.start_main_~x~4 49)) (and .cse60 .cse61 (<= ULTIMATE.start_main_~x~4 94) (<= 94 ULTIMATE.start_main_~x~4)) (and (<= 38 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 38) .cse36 .cse37) (and .cse77 (<= 95 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 95) .cse76) (and (<= ULTIMATE.start_main_~x~4 68) (<= 68 ULTIMATE.start_main_~x~4) .cse97 .cse96) (and (<= 21 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 21) .cse64 .cse65) (and (<= ULTIMATE.start_main_~x~4 44) (<= 44 ULTIMATE.start_main_~x~4) .cse88 .cse89) (and (<= 29 ULTIMATE.start_main_~x~4) .cse16 .cse17 (<= ULTIMATE.start_main_~x~4 29)) (and (<= ULTIMATE.start_main_~x~4 82) (<= 82 ULTIMATE.start_main_~x~4) .cse43 .cse42))) [2018-12-03 17:46:26,242 INFO L444 ceAbstractionStarter]: At program point L46(lines 46 53) the Hoare annotation is: false [2018-12-03 17:46:26,244 INFO L444 ceAbstractionStarter]: At program point L36(lines 30 47) the Hoare annotation is: (let ((.cse12 (<= ULTIMATE.start_main_~y~4 38)) (.cse13 (<= 38 ULTIMATE.start_main_~y~4)) (.cse44 (<= ULTIMATE.start_main_~y~4 9)) (.cse45 (<= 9 ULTIMATE.start_main_~y~4)) (.cse32 (<= 5 ULTIMATE.start_main_~y~4)) (.cse33 (<= ULTIMATE.start_main_~y~4 5)) (.cse47 (<= ULTIMATE.start_main_~y~4 43)) (.cse46 (<= 43 ULTIMATE.start_main_~y~4)) (.cse18 (<= ULTIMATE.start_main_~y~4 10)) (.cse19 (<= 10 ULTIMATE.start_main_~y~4)) (.cse16 (<= 45 ULTIMATE.start_main_~y~4)) (.cse17 (<= ULTIMATE.start_main_~y~4 45)) (.cse34 (<= 35 ULTIMATE.start_main_~y~4)) (.cse35 (<= ULTIMATE.start_main_~y~4 35)) (.cse60 (<= 37 ULTIMATE.start_main_~y~4)) (.cse61 (<= ULTIMATE.start_main_~y~4 37)) (.cse23 (<= ULTIMATE.start_main_~y~4 47)) (.cse22 (<= 47 ULTIMATE.start_main_~y~4)) (.cse65 (<= ULTIMATE.start_main_~y~4 46)) (.cse64 (<= 46 ULTIMATE.start_main_~y~4)) (.cse39 (<= ULTIMATE.start_main_~y~4 25)) (.cse38 (<= 25 ULTIMATE.start_main_~y~4)) (.cse27 (<= 39 ULTIMATE.start_main_~y~4)) (.cse26 (<= ULTIMATE.start_main_~y~4 39)) (.cse8 (<= ULTIMATE.start_main_~y~4 7)) (.cse9 (<= 7 ULTIMATE.start_main_~y~4)) (.cse40 (<= ULTIMATE.start_main_~y~4 41)) (.cse41 (<= 41 ULTIMATE.start_main_~y~4)) (.cse49 (<= 40 ULTIMATE.start_main_~y~4)) (.cse48 (<= ULTIMATE.start_main_~y~4 40)) (.cse66 (<= 12 ULTIMATE.start_main_~y~4)) (.cse67 (<= ULTIMATE.start_main_~y~4 12)) (.cse28 (<= ULTIMATE.start_main_~y~4 42)) (.cse29 (<= 42 ULTIMATE.start_main_~y~4)) (.cse42 (<= ULTIMATE.start_main_~y~4 27)) (.cse43 (<= 27 ULTIMATE.start_main_~y~4)) (.cse52 (<= 4 ULTIMATE.start_main_~y~4)) (.cse53 (<= ULTIMATE.start_main_~y~4 4)) (.cse74 (<= ULTIMATE.start_main_~y~4 2)) (.cse75 (<= 2 ULTIMATE.start_main_~y~4)) (.cse76 (<= 31 ULTIMATE.start_main_~y~4)) (.cse77 (<= ULTIMATE.start_main_~y~4 31)) (.cse30 (<= 19 ULTIMATE.start_main_~y~4)) (.cse31 (<= ULTIMATE.start_main_~y~4 19)) (.cse3 (<= 34 ULTIMATE.start_main_~y~4)) (.cse2 (<= ULTIMATE.start_main_~y~4 34)) (.cse14 (<= ULTIMATE.start_main_~y~4 44)) (.cse15 (<= 44 ULTIMATE.start_main_~y~4)) (.cse68 (<= ULTIMATE.start_main_~y~4 13)) (.cse69 (<= 13 ULTIMATE.start_main_~y~4)) (.cse6 (<= ULTIMATE.start_main_~y~4 22)) (.cse7 (<= 22 ULTIMATE.start_main_~y~4)) (.cse72 (<= 14 ULTIMATE.start_main_~y~4)) (.cse73 (<= ULTIMATE.start_main_~y~4 14)) (.cse94 (<= ULTIMATE.start_main_~y~4 1)) (.cse95 (<= 1 ULTIMATE.start_main_~y~4)) (.cse36 (<= ULTIMATE.start_main_~y~4 23)) (.cse37 (<= 23 ULTIMATE.start_main_~y~4)) (.cse89 (<= 49 ULTIMATE.start_main_~y~4)) (.cse88 (<= ULTIMATE.start_main_~y~4 49)) (.cse78 (<= 21 ULTIMATE.start_main_~y~4)) (.cse79 (<= ULTIMATE.start_main_~y~4 21)) (.cse56 (<= ULTIMATE.start_main_~y~4 15)) (.cse57 (<= 15 ULTIMATE.start_main_~y~4)) (.cse0 (<= 16 ULTIMATE.start_main_~y~4)) (.cse1 (<= ULTIMATE.start_main_~y~4 16)) (.cse4 (<= ULTIMATE.start_main_~y~4 26)) (.cse5 (<= 26 ULTIMATE.start_main_~y~4)) (.cse83 (<= ULTIMATE.start_main_~y~4 48)) (.cse82 (<= 48 ULTIMATE.start_main_~y~4)) (.cse54 (<= 24 ULTIMATE.start_main_~y~4)) (.cse55 (<= ULTIMATE.start_main_~y~4 24)) (.cse20 (<= 20 ULTIMATE.start_main_~y~4)) (.cse21 (<= ULTIMATE.start_main_~y~4 20)) (.cse10 (<= 18 ULTIMATE.start_main_~y~4)) (.cse11 (<= ULTIMATE.start_main_~y~4 18)) (.cse50 (<= ULTIMATE.start_main_~y~4 30)) (.cse51 (<= 30 ULTIMATE.start_main_~y~4)) (.cse58 (<= ULTIMATE.start_main_~y~4 29)) (.cse59 (<= 29 ULTIMATE.start_main_~y~4)) (.cse62 (<= 33 ULTIMATE.start_main_~y~4)) (.cse63 (<= ULTIMATE.start_main_~y~4 33)) (.cse70 (<= ULTIMATE.start_main_~y~4 3)) (.cse71 (<= 3 ULTIMATE.start_main_~y~4)) (.cse92 (<= 6 ULTIMATE.start_main_~y~4)) (.cse93 (<= ULTIMATE.start_main_~y~4 6)) (.cse24 (<= 17 ULTIMATE.start_main_~y~4)) (.cse25 (<= ULTIMATE.start_main_~y~4 17)) (.cse96 (<= 8 ULTIMATE.start_main_~y~4)) (.cse97 (<= ULTIMATE.start_main_~y~4 8)) (.cse91 (<= 36 ULTIMATE.start_main_~y~4)) (.cse90 (<= ULTIMATE.start_main_~y~4 36)) (.cse86 (<= ULTIMATE.start_main_~y~4 28)) (.cse87 (<= 28 ULTIMATE.start_main_~y~4)) (.cse85 (<= ULTIMATE.start_main_~y~4 11)) (.cse84 (<= 11 ULTIMATE.start_main_~y~4)) (.cse80 (<= 32 ULTIMATE.start_main_~y~4)) (.cse81 (<= ULTIMATE.start_main_~y~4 32))) (or (and (<= 15 ULTIMATE.start_main_~x~4) .cse0 (<= ULTIMATE.start_main_~x~4 15) .cse1) (and (<= ULTIMATE.start_main_~y~4 50) (<= 49 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 49) (<= 50 ULTIMATE.start_main_~y~4)) (and (<= ULTIMATE.start_main_~x~4 33) (<= 33 ULTIMATE.start_main_~x~4) .cse2 .cse3) (and .cse4 (<= ULTIMATE.start_main_~x~4 73) (<= 73 ULTIMATE.start_main_~x~4) .cse5) (and (<= ULTIMATE.start_main_~x~4 21) .cse6 (<= 21 ULTIMATE.start_main_~x~4) .cse7) (and .cse8 (<= 6 ULTIMATE.start_main_~x~4) .cse9 (<= ULTIMATE.start_main_~x~4 6)) (and .cse10 (<= ULTIMATE.start_main_~x~4 81) (<= 81 ULTIMATE.start_main_~x~4) .cse11) (and (<= 61 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 61) .cse12 .cse13) (and (<= ULTIMATE.start_main_~x~4 43) .cse14 .cse15 (<= 43 ULTIMATE.start_main_~x~4)) (and .cse16 (<= ULTIMATE.start_main_~x~4 54) (<= 54 ULTIMATE.start_main_~x~4) .cse17) (and .cse18 (<= ULTIMATE.start_main_~x~4 89) (<= 89 ULTIMATE.start_main_~x~4) .cse19) (and (<= 79 ULTIMATE.start_main_~x~4) .cse20 (<= ULTIMATE.start_main_~x~4 79) .cse21) (and (<= ULTIMATE.start_main_~x~4 46) .cse22 (<= 46 ULTIMATE.start_main_~x~4) .cse23) (and (<= ULTIMATE.start_main_~x~4 82) (<= 82 ULTIMATE.start_main_~x~4) .cse24 .cse25) (and .cse26 (<= 60 ULTIMATE.start_main_~x~4) .cse27 (<= ULTIMATE.start_main_~x~4 60)) (and .cse28 .cse29 (<= 57 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 57)) (and .cse30 (<= ULTIMATE.start_main_~x~4 80) .cse31 (<= 80 ULTIMATE.start_main_~x~4)) (and .cse32 .cse33 (<= ULTIMATE.start_main_~x~4 4) (<= 4 ULTIMATE.start_main_~x~4)) (and (<= 34 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 34) .cse34 .cse35) (and .cse36 .cse37 (<= ULTIMATE.start_main_~x~4 22) (<= 22 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 37) .cse12 .cse13 (<= 37 ULTIMATE.start_main_~x~4)) (and .cse38 (<= ULTIMATE.start_main_~x~4 24) .cse39 (<= 24 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 40) .cse40 (<= 40 ULTIMATE.start_main_~x~4) .cse41) (and .cse42 (<= 72 ULTIMATE.start_main_~x~4) .cse43 (<= ULTIMATE.start_main_~x~4 72)) (and (<= ULTIMATE.start_main_~x~4 90) .cse44 (<= 90 ULTIMATE.start_main_~x~4) .cse45) (and .cse44 (<= ULTIMATE.start_main_~x~4 8) (<= 8 ULTIMATE.start_main_~x~4) .cse45) (and .cse46 (<= ULTIMATE.start_main_~x~4 42) .cse47 (<= 42 ULTIMATE.start_main_~x~4)) (and .cse32 .cse33 (<= ULTIMATE.start_main_~x~4 94) (<= 94 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 39) .cse48 (<= 39 ULTIMATE.start_main_~x~4) .cse49) (and (<= ULTIMATE.start_main_~y~4 0) (<= 0 ULTIMATE.start_main_~y~4) (<= 99 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 99)) (and .cse50 (<= 29 ULTIMATE.start_main_~x~4) .cse51 (<= ULTIMATE.start_main_~x~4 29)) (and .cse52 (<= 95 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 95) .cse53) (and (<= ULTIMATE.start_main_~x~4 23) (<= 23 ULTIMATE.start_main_~x~4) .cse54 .cse55) (and .cse56 (<= ULTIMATE.start_main_~x~4 84) (<= 84 ULTIMATE.start_main_~x~4) .cse57) (and (<= 56 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 56) .cse47 .cse46) (and (<= ULTIMATE.start_main_~x~4 70) (<= 70 ULTIMATE.start_main_~x~4) .cse58 .cse59) (and (<= 36 ULTIMATE.start_main_~x~4) .cse60 .cse61 (<= ULTIMATE.start_main_~x~4 36)) (and (<= ULTIMATE.start_main_~x~4 32) .cse62 (<= 32 ULTIMATE.start_main_~x~4) .cse63) (and .cse18 (<= 9 ULTIMATE.start_main_~x~4) .cse19 (<= ULTIMATE.start_main_~x~4 9)) (and (<= 44 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 44) .cse16 .cse17) (and .cse34 (<= ULTIMATE.start_main_~x~4 64) (<= 64 ULTIMATE.start_main_~x~4) .cse35) (and (<= 53 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 53) .cse64 .cse65) (and .cse66 (<= ULTIMATE.start_main_~x~4 87) .cse67 (<= 87 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 62) .cse60 .cse61 (<= 62 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 52) (<= 52 ULTIMATE.start_main_~x~4) .cse23 .cse22) (and .cse65 .cse64 (<= 45 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 45)) (and (<= 74 ULTIMATE.start_main_~x~4) .cse39 .cse38 (<= ULTIMATE.start_main_~x~4 74)) (and .cse68 .cse69 (<= 86 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 86)) (and (<= 38 ULTIMATE.start_main_~x~4) .cse27 (<= ULTIMATE.start_main_~x~4 38) .cse26) (and .cse70 .cse71 (<= 2 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 2)) (and .cse72 .cse73 (<= 85 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 85)) (and .cse74 (<= 97 ULTIMATE.start_main_~x~4) .cse75 (<= ULTIMATE.start_main_~x~4 97)) (and (<= ULTIMATE.start_main_~x~4 30) .cse76 (<= 30 ULTIMATE.start_main_~x~4) .cse77) (and .cse8 (<= ULTIMATE.start_main_~x~4 92) .cse9 (<= 92 ULTIMATE.start_main_~x~4)) (and .cse40 .cse41 (<= 58 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 58)) (and (<= 20 ULTIMATE.start_main_~x~4) .cse78 (<= ULTIMATE.start_main_~x~4 20) .cse79) (and (<= ULTIMATE.start_main_~x~4 59) .cse49 .cse48 (<= 59 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 31) .cse80 (<= 31 ULTIMATE.start_main_~x~4) .cse81) (and (<= ULTIMATE.start_main_~x~4 11) (<= 11 ULTIMATE.start_main_~x~4) .cse66 .cse67) (and (<= ULTIMATE.start_main_~x~4 41) (<= 41 ULTIMATE.start_main_~x~4) .cse28 .cse29) (and .cse42 (<= ULTIMATE.start_main_~x~4 26) .cse43 (<= 26 ULTIMATE.start_main_~x~4)) (and (<= 3 ULTIMATE.start_main_~x~4) .cse52 (<= ULTIMATE.start_main_~x~4 3) .cse53) (and .cse82 (<= 47 ULTIMATE.start_main_~x~4) .cse83 (<= ULTIMATE.start_main_~x~4 47)) (and (<= 88 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 88) .cse84 .cse85) (and (<= 71 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 71) .cse86 .cse87) (and .cse74 .cse75 (<= ULTIMATE.start_main_~x~4 1) (<= 1 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 50) (<= 50 ULTIMATE.start_main_~x~4) .cse88 .cse89) (and (<= ULTIMATE.start_main_~x~4 35) (<= 35 ULTIMATE.start_main_~x~4) .cse90 .cse91) (and (<= ULTIMATE.start_main_~x~4 68) (<= 68 ULTIMATE.start_main_~x~4) .cse76 .cse77) (and (<= 18 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 18) .cse30 .cse31) (and .cse3 .cse2 (<= 65 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 65)) (and .cse14 .cse15 (<= 55 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 55)) (and (<= (+ ULTIMATE.start_main_~y~4 1) 0) (<= ULTIMATE.start_main_~x~4 100) (<= 100 ULTIMATE.start_main_~x~4)) (and (<= 12 ULTIMATE.start_main_~x~4) .cse68 .cse69 (<= ULTIMATE.start_main_~x~4 12)) (and (<= ULTIMATE.start_main_~x~4 77) .cse6 (<= 77 ULTIMATE.start_main_~x~4) .cse7) (and .cse72 (<= 13 ULTIMATE.start_main_~x~4) .cse73 (<= ULTIMATE.start_main_~x~4 13)) (and .cse92 .cse93 (<= ULTIMATE.start_main_~x~4 93) (<= 93 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 0) (<= 0 ULTIMATE.start_main_~x~4) .cse94 .cse95) (and (<= ULTIMATE.start_main_~x~4 98) (<= 98 ULTIMATE.start_main_~x~4) .cse94 .cse95) (and (<= ULTIMATE.start_main_~x~4 76) .cse36 .cse37 (<= 76 ULTIMATE.start_main_~x~4)) (and (<= 48 ULTIMATE.start_main_~x~4) .cse89 .cse88 (<= ULTIMATE.start_main_~x~4 48)) (and (<= ULTIMATE.start_main_~x~4 78) .cse78 (<= 78 ULTIMATE.start_main_~x~4) .cse79) (and .cse56 (<= 14 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 14) .cse57) (and (<= 83 ULTIMATE.start_main_~x~4) .cse0 .cse1 (<= ULTIMATE.start_main_~x~4 83)) (and .cse4 (<= ULTIMATE.start_main_~x~4 25) .cse5 (<= 25 ULTIMATE.start_main_~x~4)) (and (<= 51 ULTIMATE.start_main_~x~4) .cse83 .cse82 (<= ULTIMATE.start_main_~x~4 51)) (and (<= ULTIMATE.start_main_~x~4 75) (<= 75 ULTIMATE.start_main_~x~4) .cse54 .cse55) (and .cse20 (<= 19 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 19) .cse21) (and .cse10 (<= ULTIMATE.start_main_~x~4 17) .cse11 (<= 17 ULTIMATE.start_main_~x~4)) (and .cse50 .cse51 (<= 69 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 69)) (and (<= ULTIMATE.start_main_~x~4 28) .cse58 .cse59 (<= 28 ULTIMATE.start_main_~x~4)) (and .cse62 (<= 66 ULTIMATE.start_main_~x~4) (<= ULTIMATE.start_main_~x~4 66) .cse63) (and (<= ULTIMATE.start_main_~x~4 91) .cse96 (<= 91 ULTIMATE.start_main_~x~4) .cse97) (and .cse70 .cse71 (<= ULTIMATE.start_main_~x~4 96) (<= 96 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 5) .cse92 .cse93 (<= 5 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 16) .cse24 .cse25 (<= 16 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 7) (<= 7 ULTIMATE.start_main_~x~4) .cse96 .cse97) (and (<= 63 ULTIMATE.start_main_~x~4) .cse91 .cse90 (<= ULTIMATE.start_main_~x~4 63)) (and (<= ULTIMATE.start_main_~x~4 27) .cse86 (<= 27 ULTIMATE.start_main_~x~4) .cse87) (and (<= ULTIMATE.start_main_~x~4 10) .cse85 .cse84 (<= 10 ULTIMATE.start_main_~x~4)) (and (<= 67 ULTIMATE.start_main_~x~4) .cse80 .cse81 (<= ULTIMATE.start_main_~x~4 67)))) [2018-12-03 17:46:26,244 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 54) no Hoare annotation was computed. [2018-12-03 17:46:26,279 INFO L202 PluginConnector]: Adding new model gr2006.c.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 05:46:26 BoogieIcfgContainer [2018-12-03 17:46:26,280 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 17:46:26,281 INFO L168 Benchmark]: Toolchain (without parser) took 183393.71 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.3 GB). Free memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: -778.5 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-12-03 17:46:26,282 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 17:46:26,282 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.70 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 17:46:26,282 INFO L168 Benchmark]: Boogie Preprocessor took 23.45 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 17:46:26,283 INFO L168 Benchmark]: RCFGBuilder took 323.17 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-12-03 17:46:26,283 INFO L168 Benchmark]: TraceAbstraction took 183003.73 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -799.7 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-12-03 17:46:26,287 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 38.70 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.45 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 323.17 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 183003.73 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -799.7 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 54]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((37 <= main_~y~4 && 63 <= main_~x~4) && main_~y~4 <= 37) && main_~x~4 <= 63) || (((main_~x~4 <= 16 && 16 <= main_~y~4) && 16 <= main_~x~4) && main_~y~4 <= 16)) || (((17 <= main_~y~4 && main_~y~4 <= 17) && main_~x~4 <= 17) && 17 <= main_~x~4)) || (((main_~x~4 <= 7 && main_~y~4 <= 7) && 7 <= main_~y~4) && 7 <= main_~x~4)) || (((main_~x~4 <= 39 && main_~y~4 <= 39) && 39 <= main_~y~4) && 39 <= main_~x~4)) || (((19 <= main_~x~4 && main_~x~4 <= 19) && 19 <= main_~y~4) && main_~y~4 <= 19)) || (((main_~y~4 <= 27 && 27 <= main_~y~4) && main_~x~4 <= 73) && 73 <= main_~x~4)) || (((main_~y~4 <= 23 && 23 <= main_~y~4) && main_~x~4 <= 23) && 23 <= main_~x~4)) || (((71 <= main_~x~4 && main_~x~4 <= 71) && main_~y~4 <= 29) && 29 <= main_~y~4)) || (((12 <= main_~y~4 && 88 <= main_~x~4) && main_~x~4 <= 88) && main_~y~4 <= 12)) || (((main_~x~4 <= 91 && main_~y~4 <= 9) && 9 <= main_~y~4) && 91 <= main_~x~4)) || (((main_~x~4 <= 11 && 11 <= main_~x~4) && main_~y~4 <= 11) && 11 <= main_~y~4)) || (((main_~y~4 <= 15 && 15 <= main_~y~4) && 85 <= main_~x~4) && main_~x~4 <= 85)) || (((main_~x~4 <= 8 && 8 <= main_~y~4) && main_~y~4 <= 8) && 8 <= main_~x~4)) || (((main_~x~4 <= 34 && 34 <= main_~y~4) && 34 <= main_~x~4) && main_~y~4 <= 34)) || (((main_~x~4 <= 75 && 25 <= main_~y~4) && 75 <= main_~x~4) && main_~y~4 <= 25)) || (((2 <= main_~y~4 && main_~x~4 <= 98) && main_~y~4 <= 2) && 98 <= main_~x~4)) || (((20 <= main_~y~4 && main_~x~4 <= 80) && 80 <= main_~x~4) && main_~y~4 <= 20)) || (((main_~x~4 <= 62 && main_~y~4 <= 38) && 62 <= main_~x~4) && 38 <= main_~y~4)) || (((74 <= main_~x~4 && main_~y~4 <= 26) && main_~x~4 <= 74) && 26 <= main_~y~4)) || (((main_~y~4 <= 3 && 97 <= main_~x~4) && main_~x~4 <= 97) && 3 <= main_~y~4)) || (((main_~y~4 <= 15 && 15 <= main_~x~4) && main_~x~4 <= 15) && 15 <= main_~y~4)) || (((12 <= main_~x~4 && 12 <= main_~y~4) && main_~y~4 <= 12) && main_~x~4 <= 12)) || (((18 <= main_~y~4 && 18 <= main_~x~4) && main_~x~4 <= 18) && main_~y~4 <= 18)) || (((45 <= main_~y~4 && 55 <= main_~x~4) && main_~x~4 <= 55) && main_~y~4 <= 45)) || (((10 <= main_~x~4 && main_~y~4 <= 10) && main_~x~4 <= 10) && 10 <= main_~y~4)) || (((69 <= main_~x~4 && 31 <= main_~y~4) && main_~x~4 <= 69) && main_~y~4 <= 31)) || (((main_~x~4 <= 50 && main_~y~4 <= 50) && 50 <= main_~x~4) && 50 <= main_~y~4)) || (((40 <= main_~y~4 && 60 <= main_~x~4) && main_~y~4 <= 40) && main_~x~4 <= 60)) || (((main_~y~4 <= 0 && 0 <= main_~y~4) && main_~x~4 <= 0) && 0 <= main_~x~4)) || (((47 <= main_~x~4 && 47 <= main_~y~4) && main_~x~4 <= 47) && main_~y~4 <= 47)) || (((main_~x~4 <= 52 && 52 <= main_~x~4) && main_~y~4 <= 48) && 48 <= main_~y~4)) || (((16 <= main_~y~4 && main_~x~4 <= 84) && main_~y~4 <= 16) && 84 <= main_~x~4)) || (((13 <= main_~y~4 && main_~y~4 <= 13) && main_~x~4 <= 87) && 87 <= main_~x~4)) || (((6 <= main_~x~4 && 6 <= main_~y~4) && main_~y~4 <= 6) && main_~x~4 <= 6)) || (((41 <= main_~x~4 && 41 <= main_~y~4) && main_~x~4 <= 41) && main_~y~4 <= 41)) || (((20 <= main_~x~4 && 20 <= main_~y~4) && main_~y~4 <= 20) && main_~x~4 <= 20)) || (((79 <= main_~x~4 && main_~x~4 <= 79) && 21 <= main_~y~4) && main_~y~4 <= 21)) || (((main_~x~4 <= 33 && 33 <= main_~y~4) && 33 <= main_~x~4) && main_~y~4 <= 33)) || (((28 <= main_~x~4 && main_~y~4 <= 28) && main_~x~4 <= 28) && 28 <= main_~y~4)) || (((57 <= main_~x~4 && main_~x~4 <= 57) && main_~y~4 <= 43) && 43 <= main_~y~4)) || (((main_~y~4 <= 2 && 2 <= main_~y~4) && 2 <= main_~x~4) && main_~x~4 <= 2)) || (((13 <= main_~x~4 && main_~y~4 <= 13) && 13 <= main_~y~4) && main_~x~4 <= 13)) || (((37 <= main_~y~4 && main_~x~4 <= 37) && main_~y~4 <= 37) && 37 <= main_~x~4)) || (((main_~y~4 <= 22 && 22 <= main_~y~4) && main_~x~4 <= 78) && 78 <= main_~x~4)) || (((26 <= main_~x~4 && main_~x~4 <= 26) && main_~y~4 <= 26) && 26 <= main_~y~4)) || (((main_~x~4 <= 1 && main_~y~4 <= 1) && 1 <= main_~y~4) && 1 <= main_~x~4)) || (((main_~x~4 <= 5 && 5 <= main_~y~4) && main_~y~4 <= 5) && 5 <= main_~x~4)) || (((main_~y~4 <= 48 && main_~x~4 <= 48) && 48 <= main_~x~4) && 48 <= main_~y~4)) || (((67 <= main_~x~4 && main_~y~4 <= 33) && 33 <= main_~y~4) && main_~x~4 <= 67)) || (((main_~x~4 <= 36 && 36 <= main_~y~4) && 36 <= main_~x~4) && main_~y~4 <= 36)) || (((35 <= main_~y~4 && main_~y~4 <= 35) && 65 <= main_~x~4) && main_~x~4 <= 65)) || (((main_~y~4 <= 9 && 9 <= main_~x~4) && main_~x~4 <= 9) && 9 <= main_~y~4)) || (((4 <= main_~y~4 && main_~x~4 <= 96) && 96 <= main_~x~4) && main_~y~4 <= 4)) || (((main_~x~4 <= 76 && main_~y~4 <= 24) && 24 <= main_~y~4) && 76 <= main_~x~4)) || (((main_~y~4 <= 30 && 30 <= main_~y~4) && main_~x~4 <= 30) && 30 <= main_~x~4)) || (((main_~y~4 <= 0 && 0 <= main_~y~4) && main_~x~4 <= 100) && 100 <= main_~x~4)) || (((main_~y~4 <= 30 && main_~x~4 <= 70) && 70 <= main_~x~4) && 30 <= main_~y~4)) || (((main_~y~4 <= 22 && main_~x~4 <= 22) && 22 <= main_~x~4) && 22 <= main_~y~4)) || (((61 <= main_~x~4 && 39 <= main_~y~4) && main_~x~4 <= 61) && main_~y~4 <= 39)) || (((25 <= main_~y~4 && main_~y~4 <= 25) && main_~x~4 <= 25) && 25 <= main_~x~4)) || (((main_~y~4 <= 7 && 7 <= main_~y~4) && main_~x~4 <= 93) && 93 <= main_~x~4)) || (((main_~y~4 <= 45 && main_~x~4 <= 45) && 45 <= main_~y~4) && 45 <= main_~x~4)) || (((72 <= main_~x~4 && main_~y~4 <= 28) && main_~x~4 <= 72) && 28 <= main_~y~4)) || (((4 <= main_~y~4 && main_~x~4 <= 4) && 4 <= main_~x~4) && main_~y~4 <= 4)) || (((56 <= main_~x~4 && main_~x~4 <= 56) && main_~y~4 <= 44) && 44 <= main_~y~4)) || (((main_~x~4 <= 31 && 31 <= main_~y~4) && main_~y~4 <= 31) && 31 <= main_~x~4)) || (((main_~x~4 <= 54 && main_~y~4 <= 46) && 54 <= main_~x~4) && 46 <= main_~y~4)) || (((main_~x~4 <= 77 && 23 <= main_~y~4) && 77 <= main_~x~4) && main_~y~4 <= 23)) || (((main_~x~4 <= 46 && 46 <= main_~y~4) && 46 <= main_~x~4) && main_~y~4 <= 46)) || (((3 <= main_~x~4 && main_~y~4 <= 3) && 3 <= main_~y~4) && main_~x~4 <= 3)) || (((main_~y~4 <= 24 && 24 <= main_~y~4) && main_~x~4 <= 24) && 24 <= main_~x~4)) || (((41 <= main_~y~4 && main_~x~4 <= 59) && main_~y~4 <= 41) && 59 <= main_~x~4)) || (((main_~x~4 <= 43 && 43 <= main_~x~4) && 43 <= main_~y~4) && main_~y~4 <= 43)) || (((86 <= main_~x~4 && 14 <= main_~y~4) && main_~y~4 <= 14) && main_~x~4 <= 86)) || (((main_~x~4 <= 35 && main_~y~4 <= 35) && 35 <= main_~y~4) && 35 <= main_~x~4)) || (((36 <= main_~y~4 && main_~x~4 <= 64) && main_~y~4 <= 36) && 64 <= main_~x~4)) || (((66 <= main_~x~4 && 34 <= main_~y~4) && main_~x~4 <= 66) && main_~y~4 <= 34)) || (((42 <= main_~y~4 && 58 <= main_~x~4) && main_~y~4 <= 42) && main_~x~4 <= 58)) || (((40 <= main_~y~4 && main_~x~4 <= 40) && main_~y~4 <= 40) && 40 <= main_~x~4)) || (((32 <= main_~x~4 && main_~y~4 <= 32) && main_~x~4 <= 32) && 32 <= main_~y~4)) || (((99 <= main_~x~4 && main_~x~4 <= 99) && main_~y~4 <= 1) && 1 <= main_~y~4)) || (((19 <= main_~y~4 && main_~x~4 <= 81) && 81 <= main_~x~4) && main_~y~4 <= 19)) || (((51 <= main_~x~4 && main_~y~4 <= 49) && main_~x~4 <= 51) && 49 <= main_~y~4)) || (((main_~x~4 <= 92 && 8 <= main_~y~4) && main_~y~4 <= 8) && 92 <= main_~x~4)) || (((14 <= main_~y~4 && 14 <= main_~x~4) && main_~y~4 <= 14) && main_~x~4 <= 14)) || (((11 <= main_~y~4 && main_~x~4 <= 89) && 89 <= main_~x~4) && main_~y~4 <= 11)) || (((main_~y~4 <= 10 && main_~x~4 <= 90) && 90 <= main_~x~4) && 10 <= main_~y~4)) || (((main_~y~4 <= 42 && 42 <= main_~y~4) && main_~x~4 <= 42) && 42 <= main_~x~4)) || (((47 <= main_~y~4 && 53 <= main_~x~4) && main_~x~4 <= 53) && main_~y~4 <= 47)) || (((83 <= main_~x~4 && 17 <= main_~y~4) && main_~y~4 <= 17) && main_~x~4 <= 83)) || (((main_~y~4 <= 27 && main_~x~4 <= 27) && 27 <= main_~y~4) && 27 <= main_~x~4)) || (((49 <= main_~x~4 && 49 <= main_~y~4) && main_~y~4 <= 49) && main_~x~4 <= 49)) || (((6 <= main_~y~4 && main_~y~4 <= 6) && main_~x~4 <= 94) && 94 <= main_~x~4)) || (((38 <= main_~x~4 && main_~x~4 <= 38) && main_~y~4 <= 38) && 38 <= main_~y~4)) || (((main_~y~4 <= 5 && 95 <= main_~x~4) && main_~x~4 <= 95) && 5 <= main_~y~4)) || (((main_~x~4 <= 68 && 68 <= main_~x~4) && 32 <= main_~y~4) && main_~y~4 <= 32)) || (((21 <= main_~x~4 && main_~x~4 <= 21) && 21 <= main_~y~4) && main_~y~4 <= 21)) || (((main_~x~4 <= 44 && 44 <= main_~x~4) && main_~y~4 <= 44) && 44 <= main_~y~4)) || (((29 <= main_~x~4 && main_~y~4 <= 29) && 29 <= main_~y~4) && main_~x~4 <= 29)) || (((main_~x~4 <= 82 && 82 <= main_~x~4) && main_~y~4 <= 18) && 18 <= main_~y~4) - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: false - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((37 <= main_~y~4 && 63 <= main_~x~4) && main_~y~4 <= 37) && main_~x~4 <= 63) || (((main_~x~4 <= 16 && 16 <= main_~y~4) && 16 <= main_~x~4) && main_~y~4 <= 16)) || (((17 <= main_~y~4 && main_~y~4 <= 17) && main_~x~4 <= 17) && 17 <= main_~x~4)) || (((main_~x~4 <= 7 && main_~y~4 <= 7) && 7 <= main_~y~4) && 7 <= main_~x~4)) || (((main_~x~4 <= 39 && main_~y~4 <= 39) && 39 <= main_~y~4) && 39 <= main_~x~4)) || (((19 <= main_~x~4 && main_~x~4 <= 19) && 19 <= main_~y~4) && main_~y~4 <= 19)) || (((main_~y~4 <= 27 && 27 <= main_~y~4) && main_~x~4 <= 73) && 73 <= main_~x~4)) || (((main_~y~4 <= 23 && 23 <= main_~y~4) && main_~x~4 <= 23) && 23 <= main_~x~4)) || (((71 <= main_~x~4 && main_~x~4 <= 71) && main_~y~4 <= 29) && 29 <= main_~y~4)) || (((12 <= main_~y~4 && 88 <= main_~x~4) && main_~x~4 <= 88) && main_~y~4 <= 12)) || (((main_~x~4 <= 91 && main_~y~4 <= 9) && 9 <= main_~y~4) && 91 <= main_~x~4)) || (((main_~x~4 <= 11 && 11 <= main_~x~4) && main_~y~4 <= 11) && 11 <= main_~y~4)) || (((main_~y~4 <= 15 && 15 <= main_~y~4) && 85 <= main_~x~4) && main_~x~4 <= 85)) || (((main_~x~4 <= 8 && 8 <= main_~y~4) && main_~y~4 <= 8) && 8 <= main_~x~4)) || (((main_~x~4 <= 34 && 34 <= main_~y~4) && 34 <= main_~x~4) && main_~y~4 <= 34)) || (((main_~x~4 <= 75 && 25 <= main_~y~4) && 75 <= main_~x~4) && main_~y~4 <= 25)) || (((2 <= main_~y~4 && main_~x~4 <= 98) && main_~y~4 <= 2) && 98 <= main_~x~4)) || (((20 <= main_~y~4 && main_~x~4 <= 80) && 80 <= main_~x~4) && main_~y~4 <= 20)) || (((main_~x~4 <= 62 && main_~y~4 <= 38) && 62 <= main_~x~4) && 38 <= main_~y~4)) || (((74 <= main_~x~4 && main_~y~4 <= 26) && main_~x~4 <= 74) && 26 <= main_~y~4)) || (((main_~y~4 <= 3 && 97 <= main_~x~4) && main_~x~4 <= 97) && 3 <= main_~y~4)) || (((main_~y~4 <= 15 && 15 <= main_~x~4) && main_~x~4 <= 15) && 15 <= main_~y~4)) || (((12 <= main_~x~4 && 12 <= main_~y~4) && main_~y~4 <= 12) && main_~x~4 <= 12)) || (((18 <= main_~y~4 && 18 <= main_~x~4) && main_~x~4 <= 18) && main_~y~4 <= 18)) || (((45 <= main_~y~4 && 55 <= main_~x~4) && main_~x~4 <= 55) && main_~y~4 <= 45)) || (((10 <= main_~x~4 && main_~y~4 <= 10) && main_~x~4 <= 10) && 10 <= main_~y~4)) || (((69 <= main_~x~4 && 31 <= main_~y~4) && main_~x~4 <= 69) && main_~y~4 <= 31)) || (((main_~x~4 <= 50 && main_~y~4 <= 50) && 50 <= main_~x~4) && 50 <= main_~y~4)) || (((40 <= main_~y~4 && 60 <= main_~x~4) && main_~y~4 <= 40) && main_~x~4 <= 60)) || (((main_~y~4 <= 0 && 0 <= main_~y~4) && main_~x~4 <= 0) && 0 <= main_~x~4)) || (((47 <= main_~x~4 && 47 <= main_~y~4) && main_~x~4 <= 47) && main_~y~4 <= 47)) || (((main_~x~4 <= 52 && 52 <= main_~x~4) && main_~y~4 <= 48) && 48 <= main_~y~4)) || (((16 <= main_~y~4 && main_~x~4 <= 84) && main_~y~4 <= 16) && 84 <= main_~x~4)) || (((13 <= main_~y~4 && main_~y~4 <= 13) && main_~x~4 <= 87) && 87 <= main_~x~4)) || (((6 <= main_~x~4 && 6 <= main_~y~4) && main_~y~4 <= 6) && main_~x~4 <= 6)) || (((41 <= main_~x~4 && 41 <= main_~y~4) && main_~x~4 <= 41) && main_~y~4 <= 41)) || (((20 <= main_~x~4 && 20 <= main_~y~4) && main_~y~4 <= 20) && main_~x~4 <= 20)) || (((79 <= main_~x~4 && main_~x~4 <= 79) && 21 <= main_~y~4) && main_~y~4 <= 21)) || (((main_~x~4 <= 33 && 33 <= main_~y~4) && 33 <= main_~x~4) && main_~y~4 <= 33)) || (((28 <= main_~x~4 && main_~y~4 <= 28) && main_~x~4 <= 28) && 28 <= main_~y~4)) || (((57 <= main_~x~4 && main_~x~4 <= 57) && main_~y~4 <= 43) && 43 <= main_~y~4)) || (((main_~y~4 <= 2 && 2 <= main_~y~4) && 2 <= main_~x~4) && main_~x~4 <= 2)) || (((13 <= main_~x~4 && main_~y~4 <= 13) && 13 <= main_~y~4) && main_~x~4 <= 13)) || (((37 <= main_~y~4 && main_~x~4 <= 37) && main_~y~4 <= 37) && 37 <= main_~x~4)) || (((main_~y~4 <= 22 && 22 <= main_~y~4) && main_~x~4 <= 78) && 78 <= main_~x~4)) || (((26 <= main_~x~4 && main_~x~4 <= 26) && main_~y~4 <= 26) && 26 <= main_~y~4)) || (((main_~x~4 <= 1 && main_~y~4 <= 1) && 1 <= main_~y~4) && 1 <= main_~x~4)) || (((main_~x~4 <= 5 && 5 <= main_~y~4) && main_~y~4 <= 5) && 5 <= main_~x~4)) || (((main_~y~4 <= 48 && main_~x~4 <= 48) && 48 <= main_~x~4) && 48 <= main_~y~4)) || (((67 <= main_~x~4 && main_~y~4 <= 33) && 33 <= main_~y~4) && main_~x~4 <= 67)) || (((main_~x~4 <= 36 && 36 <= main_~y~4) && 36 <= main_~x~4) && main_~y~4 <= 36)) || (((35 <= main_~y~4 && main_~y~4 <= 35) && 65 <= main_~x~4) && main_~x~4 <= 65)) || (((main_~y~4 <= 9 && 9 <= main_~x~4) && main_~x~4 <= 9) && 9 <= main_~y~4)) || (((4 <= main_~y~4 && main_~x~4 <= 96) && 96 <= main_~x~4) && main_~y~4 <= 4)) || (((main_~x~4 <= 76 && main_~y~4 <= 24) && 24 <= main_~y~4) && 76 <= main_~x~4)) || (((main_~y~4 <= 30 && 30 <= main_~y~4) && main_~x~4 <= 30) && 30 <= main_~x~4)) || (((main_~y~4 <= 0 && 0 <= main_~y~4) && main_~x~4 <= 100) && 100 <= main_~x~4)) || (((main_~y~4 <= 30 && main_~x~4 <= 70) && 70 <= main_~x~4) && 30 <= main_~y~4)) || (((main_~y~4 <= 22 && main_~x~4 <= 22) && 22 <= main_~x~4) && 22 <= main_~y~4)) || (((61 <= main_~x~4 && 39 <= main_~y~4) && main_~x~4 <= 61) && main_~y~4 <= 39)) || (((25 <= main_~y~4 && main_~y~4 <= 25) && main_~x~4 <= 25) && 25 <= main_~x~4)) || (((main_~y~4 <= 7 && 7 <= main_~y~4) && main_~x~4 <= 93) && 93 <= main_~x~4)) || (((main_~y~4 <= 45 && main_~x~4 <= 45) && 45 <= main_~y~4) && 45 <= main_~x~4)) || (((72 <= main_~x~4 && main_~y~4 <= 28) && main_~x~4 <= 72) && 28 <= main_~y~4)) || (((4 <= main_~y~4 && main_~x~4 <= 4) && 4 <= main_~x~4) && main_~y~4 <= 4)) || (((56 <= main_~x~4 && main_~x~4 <= 56) && main_~y~4 <= 44) && 44 <= main_~y~4)) || (((main_~x~4 <= 31 && 31 <= main_~y~4) && main_~y~4 <= 31) && 31 <= main_~x~4)) || (((main_~x~4 <= 54 && main_~y~4 <= 46) && 54 <= main_~x~4) && 46 <= main_~y~4)) || (((main_~x~4 <= 77 && 23 <= main_~y~4) && 77 <= main_~x~4) && main_~y~4 <= 23)) || (((main_~x~4 <= 46 && 46 <= main_~y~4) && 46 <= main_~x~4) && main_~y~4 <= 46)) || (((3 <= main_~x~4 && main_~y~4 <= 3) && 3 <= main_~y~4) && main_~x~4 <= 3)) || (((main_~y~4 <= 24 && 24 <= main_~y~4) && main_~x~4 <= 24) && 24 <= main_~x~4)) || (((41 <= main_~y~4 && main_~x~4 <= 59) && main_~y~4 <= 41) && 59 <= main_~x~4)) || (((main_~x~4 <= 43 && 43 <= main_~x~4) && 43 <= main_~y~4) && main_~y~4 <= 43)) || (((86 <= main_~x~4 && 14 <= main_~y~4) && main_~y~4 <= 14) && main_~x~4 <= 86)) || (((main_~x~4 <= 35 && main_~y~4 <= 35) && 35 <= main_~y~4) && 35 <= main_~x~4)) || (((36 <= main_~y~4 && main_~x~4 <= 64) && main_~y~4 <= 36) && 64 <= main_~x~4)) || (((66 <= main_~x~4 && 34 <= main_~y~4) && main_~x~4 <= 66) && main_~y~4 <= 34)) || (((42 <= main_~y~4 && 58 <= main_~x~4) && main_~y~4 <= 42) && main_~x~4 <= 58)) || (((40 <= main_~y~4 && main_~x~4 <= 40) && main_~y~4 <= 40) && 40 <= main_~x~4)) || (((32 <= main_~x~4 && main_~y~4 <= 32) && main_~x~4 <= 32) && 32 <= main_~y~4)) || (((99 <= main_~x~4 && main_~x~4 <= 99) && main_~y~4 <= 1) && 1 <= main_~y~4)) || (((19 <= main_~y~4 && main_~x~4 <= 81) && 81 <= main_~x~4) && main_~y~4 <= 19)) || (((51 <= main_~x~4 && main_~y~4 <= 49) && main_~x~4 <= 51) && 49 <= main_~y~4)) || (((main_~x~4 <= 92 && 8 <= main_~y~4) && main_~y~4 <= 8) && 92 <= main_~x~4)) || (((14 <= main_~y~4 && 14 <= main_~x~4) && main_~y~4 <= 14) && main_~x~4 <= 14)) || (((11 <= main_~y~4 && main_~x~4 <= 89) && 89 <= main_~x~4) && main_~y~4 <= 11)) || (((main_~y~4 <= 10 && main_~x~4 <= 90) && 90 <= main_~x~4) && 10 <= main_~y~4)) || (((main_~y~4 <= 42 && 42 <= main_~y~4) && main_~x~4 <= 42) && 42 <= main_~x~4)) || (((47 <= main_~y~4 && 53 <= main_~x~4) && main_~x~4 <= 53) && main_~y~4 <= 47)) || (((83 <= main_~x~4 && 17 <= main_~y~4) && main_~y~4 <= 17) && main_~x~4 <= 83)) || (((main_~y~4 <= 27 && main_~x~4 <= 27) && 27 <= main_~y~4) && 27 <= main_~x~4)) || (((49 <= main_~x~4 && 49 <= main_~y~4) && main_~y~4 <= 49) && main_~x~4 <= 49)) || (((6 <= main_~y~4 && main_~y~4 <= 6) && main_~x~4 <= 94) && 94 <= main_~x~4)) || (((38 <= main_~x~4 && main_~x~4 <= 38) && main_~y~4 <= 38) && 38 <= main_~y~4)) || (((main_~y~4 <= 5 && 95 <= main_~x~4) && main_~x~4 <= 95) && 5 <= main_~y~4)) || (((main_~x~4 <= 68 && 68 <= main_~x~4) && 32 <= main_~y~4) && main_~y~4 <= 32)) || (((21 <= main_~x~4 && main_~x~4 <= 21) && 21 <= main_~y~4) && main_~y~4 <= 21)) || (((main_~x~4 <= 44 && 44 <= main_~x~4) && main_~y~4 <= 44) && 44 <= main_~y~4)) || (((29 <= main_~x~4 && main_~y~4 <= 29) && 29 <= main_~y~4) && main_~x~4 <= 29)) || (((main_~x~4 <= 82 && 82 <= main_~x~4) && main_~y~4 <= 18) && 18 <= main_~y~4) - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((15 <= main_~x~4 && 16 <= main_~y~4) && main_~x~4 <= 15) && main_~y~4 <= 16) || (((main_~y~4 <= 50 && 49 <= main_~x~4) && main_~x~4 <= 49) && 50 <= main_~y~4)) || (((main_~x~4 <= 33 && 33 <= main_~x~4) && main_~y~4 <= 34) && 34 <= main_~y~4)) || (((main_~y~4 <= 26 && main_~x~4 <= 73) && 73 <= main_~x~4) && 26 <= main_~y~4)) || (((main_~x~4 <= 21 && main_~y~4 <= 22) && 21 <= main_~x~4) && 22 <= main_~y~4)) || (((main_~y~4 <= 7 && 6 <= main_~x~4) && 7 <= main_~y~4) && main_~x~4 <= 6)) || (((18 <= main_~y~4 && main_~x~4 <= 81) && 81 <= main_~x~4) && main_~y~4 <= 18)) || (((61 <= main_~x~4 && main_~x~4 <= 61) && main_~y~4 <= 38) && 38 <= main_~y~4)) || (((main_~x~4 <= 43 && main_~y~4 <= 44) && 44 <= main_~y~4) && 43 <= main_~x~4)) || (((45 <= main_~y~4 && main_~x~4 <= 54) && 54 <= main_~x~4) && main_~y~4 <= 45)) || (((main_~y~4 <= 10 && main_~x~4 <= 89) && 89 <= main_~x~4) && 10 <= main_~y~4)) || (((79 <= main_~x~4 && 20 <= main_~y~4) && main_~x~4 <= 79) && main_~y~4 <= 20)) || (((main_~x~4 <= 46 && 47 <= main_~y~4) && 46 <= main_~x~4) && main_~y~4 <= 47)) || (((main_~x~4 <= 82 && 82 <= main_~x~4) && 17 <= main_~y~4) && main_~y~4 <= 17)) || (((main_~y~4 <= 39 && 60 <= main_~x~4) && 39 <= main_~y~4) && main_~x~4 <= 60)) || (((main_~y~4 <= 42 && 42 <= main_~y~4) && 57 <= main_~x~4) && main_~x~4 <= 57)) || (((19 <= main_~y~4 && main_~x~4 <= 80) && main_~y~4 <= 19) && 80 <= main_~x~4)) || (((5 <= main_~y~4 && main_~y~4 <= 5) && main_~x~4 <= 4) && 4 <= main_~x~4)) || (((34 <= main_~x~4 && main_~x~4 <= 34) && 35 <= main_~y~4) && main_~y~4 <= 35)) || (((main_~y~4 <= 23 && 23 <= main_~y~4) && main_~x~4 <= 22) && 22 <= main_~x~4)) || (((main_~x~4 <= 37 && main_~y~4 <= 38) && 38 <= main_~y~4) && 37 <= main_~x~4)) || (((25 <= main_~y~4 && main_~x~4 <= 24) && main_~y~4 <= 25) && 24 <= main_~x~4)) || (((main_~x~4 <= 40 && main_~y~4 <= 41) && 40 <= main_~x~4) && 41 <= main_~y~4)) || (((main_~y~4 <= 27 && 72 <= main_~x~4) && 27 <= main_~y~4) && main_~x~4 <= 72)) || (((main_~x~4 <= 90 && main_~y~4 <= 9) && 90 <= main_~x~4) && 9 <= main_~y~4)) || (((main_~y~4 <= 9 && main_~x~4 <= 8) && 8 <= main_~x~4) && 9 <= main_~y~4)) || (((43 <= main_~y~4 && main_~x~4 <= 42) && main_~y~4 <= 43) && 42 <= main_~x~4)) || (((5 <= main_~y~4 && main_~y~4 <= 5) && main_~x~4 <= 94) && 94 <= main_~x~4)) || (((main_~x~4 <= 39 && main_~y~4 <= 40) && 39 <= main_~x~4) && 40 <= main_~y~4)) || (((main_~y~4 <= 0 && 0 <= main_~y~4) && 99 <= main_~x~4) && main_~x~4 <= 99)) || (((main_~y~4 <= 30 && 29 <= main_~x~4) && 30 <= main_~y~4) && main_~x~4 <= 29)) || (((4 <= main_~y~4 && 95 <= main_~x~4) && main_~x~4 <= 95) && main_~y~4 <= 4)) || (((main_~x~4 <= 23 && 23 <= main_~x~4) && 24 <= main_~y~4) && main_~y~4 <= 24)) || (((main_~y~4 <= 15 && main_~x~4 <= 84) && 84 <= main_~x~4) && 15 <= main_~y~4)) || (((56 <= main_~x~4 && main_~x~4 <= 56) && main_~y~4 <= 43) && 43 <= main_~y~4)) || (((main_~x~4 <= 70 && 70 <= main_~x~4) && main_~y~4 <= 29) && 29 <= main_~y~4)) || (((36 <= main_~x~4 && 37 <= main_~y~4) && main_~y~4 <= 37) && main_~x~4 <= 36)) || (((main_~x~4 <= 32 && 33 <= main_~y~4) && 32 <= main_~x~4) && main_~y~4 <= 33)) || (((main_~y~4 <= 10 && 9 <= main_~x~4) && 10 <= main_~y~4) && main_~x~4 <= 9)) || (((44 <= main_~x~4 && main_~x~4 <= 44) && 45 <= main_~y~4) && main_~y~4 <= 45)) || (((35 <= main_~y~4 && main_~x~4 <= 64) && 64 <= main_~x~4) && main_~y~4 <= 35)) || (((53 <= main_~x~4 && main_~x~4 <= 53) && 46 <= main_~y~4) && main_~y~4 <= 46)) || (((12 <= main_~y~4 && main_~x~4 <= 87) && main_~y~4 <= 12) && 87 <= main_~x~4)) || (((main_~x~4 <= 62 && 37 <= main_~y~4) && main_~y~4 <= 37) && 62 <= main_~x~4)) || (((main_~x~4 <= 52 && 52 <= main_~x~4) && main_~y~4 <= 47) && 47 <= main_~y~4)) || (((main_~y~4 <= 46 && 46 <= main_~y~4) && 45 <= main_~x~4) && main_~x~4 <= 45)) || (((74 <= main_~x~4 && main_~y~4 <= 25) && 25 <= main_~y~4) && main_~x~4 <= 74)) || (((main_~y~4 <= 13 && 13 <= main_~y~4) && 86 <= main_~x~4) && main_~x~4 <= 86)) || (((38 <= main_~x~4 && 39 <= main_~y~4) && main_~x~4 <= 38) && main_~y~4 <= 39)) || (((main_~y~4 <= 3 && 3 <= main_~y~4) && 2 <= main_~x~4) && main_~x~4 <= 2)) || (((14 <= main_~y~4 && main_~y~4 <= 14) && 85 <= main_~x~4) && main_~x~4 <= 85)) || (((main_~y~4 <= 2 && 97 <= main_~x~4) && 2 <= main_~y~4) && main_~x~4 <= 97)) || (((main_~x~4 <= 30 && 31 <= main_~y~4) && 30 <= main_~x~4) && main_~y~4 <= 31)) || (((main_~y~4 <= 7 && main_~x~4 <= 92) && 7 <= main_~y~4) && 92 <= main_~x~4)) || (((main_~y~4 <= 41 && 41 <= main_~y~4) && 58 <= main_~x~4) && main_~x~4 <= 58)) || (((20 <= main_~x~4 && 21 <= main_~y~4) && main_~x~4 <= 20) && main_~y~4 <= 21)) || (((main_~x~4 <= 59 && 40 <= main_~y~4) && main_~y~4 <= 40) && 59 <= main_~x~4)) || (((main_~x~4 <= 31 && 32 <= main_~y~4) && 31 <= main_~x~4) && main_~y~4 <= 32)) || (((main_~x~4 <= 11 && 11 <= main_~x~4) && 12 <= main_~y~4) && main_~y~4 <= 12)) || (((main_~x~4 <= 41 && 41 <= main_~x~4) && main_~y~4 <= 42) && 42 <= main_~y~4)) || (((main_~y~4 <= 27 && main_~x~4 <= 26) && 27 <= main_~y~4) && 26 <= main_~x~4)) || (((3 <= main_~x~4 && 4 <= main_~y~4) && main_~x~4 <= 3) && main_~y~4 <= 4)) || (((48 <= main_~y~4 && 47 <= main_~x~4) && main_~y~4 <= 48) && main_~x~4 <= 47)) || (((88 <= main_~x~4 && main_~x~4 <= 88) && 11 <= main_~y~4) && main_~y~4 <= 11)) || (((71 <= main_~x~4 && main_~x~4 <= 71) && main_~y~4 <= 28) && 28 <= main_~y~4)) || (((main_~y~4 <= 2 && 2 <= main_~y~4) && main_~x~4 <= 1) && 1 <= main_~x~4)) || (((main_~x~4 <= 50 && 50 <= main_~x~4) && main_~y~4 <= 49) && 49 <= main_~y~4)) || (((main_~x~4 <= 35 && 35 <= main_~x~4) && main_~y~4 <= 36) && 36 <= main_~y~4)) || (((main_~x~4 <= 68 && 68 <= main_~x~4) && 31 <= main_~y~4) && main_~y~4 <= 31)) || (((18 <= main_~x~4 && main_~x~4 <= 18) && 19 <= main_~y~4) && main_~y~4 <= 19)) || (((34 <= main_~y~4 && main_~y~4 <= 34) && 65 <= main_~x~4) && main_~x~4 <= 65)) || (((main_~y~4 <= 44 && 44 <= main_~y~4) && 55 <= main_~x~4) && main_~x~4 <= 55)) || ((main_~y~4 + 1 <= 0 && main_~x~4 <= 100) && 100 <= main_~x~4)) || (((12 <= main_~x~4 && main_~y~4 <= 13) && 13 <= main_~y~4) && main_~x~4 <= 12)) || (((main_~x~4 <= 77 && main_~y~4 <= 22) && 77 <= main_~x~4) && 22 <= main_~y~4)) || (((14 <= main_~y~4 && 13 <= main_~x~4) && main_~y~4 <= 14) && main_~x~4 <= 13)) || (((6 <= main_~y~4 && main_~y~4 <= 6) && main_~x~4 <= 93) && 93 <= main_~x~4)) || (((main_~x~4 <= 0 && 0 <= main_~x~4) && main_~y~4 <= 1) && 1 <= main_~y~4)) || (((main_~x~4 <= 98 && 98 <= main_~x~4) && main_~y~4 <= 1) && 1 <= main_~y~4)) || (((main_~x~4 <= 76 && main_~y~4 <= 23) && 23 <= main_~y~4) && 76 <= main_~x~4)) || (((48 <= main_~x~4 && 49 <= main_~y~4) && main_~y~4 <= 49) && main_~x~4 <= 48)) || (((main_~x~4 <= 78 && 21 <= main_~y~4) && 78 <= main_~x~4) && main_~y~4 <= 21)) || (((main_~y~4 <= 15 && 14 <= main_~x~4) && main_~x~4 <= 14) && 15 <= main_~y~4)) || (((83 <= main_~x~4 && 16 <= main_~y~4) && main_~y~4 <= 16) && main_~x~4 <= 83)) || (((main_~y~4 <= 26 && main_~x~4 <= 25) && 26 <= main_~y~4) && 25 <= main_~x~4)) || (((51 <= main_~x~4 && main_~y~4 <= 48) && 48 <= main_~y~4) && main_~x~4 <= 51)) || (((main_~x~4 <= 75 && 75 <= main_~x~4) && 24 <= main_~y~4) && main_~y~4 <= 24)) || (((20 <= main_~y~4 && 19 <= main_~x~4) && main_~x~4 <= 19) && main_~y~4 <= 20)) || (((18 <= main_~y~4 && main_~x~4 <= 17) && main_~y~4 <= 18) && 17 <= main_~x~4)) || (((main_~y~4 <= 30 && 30 <= main_~y~4) && 69 <= main_~x~4) && main_~x~4 <= 69)) || (((main_~x~4 <= 28 && main_~y~4 <= 29) && 29 <= main_~y~4) && 28 <= main_~x~4)) || (((33 <= main_~y~4 && 66 <= main_~x~4) && main_~x~4 <= 66) && main_~y~4 <= 33)) || (((main_~x~4 <= 91 && 8 <= main_~y~4) && 91 <= main_~x~4) && main_~y~4 <= 8)) || (((main_~y~4 <= 3 && 3 <= main_~y~4) && main_~x~4 <= 96) && 96 <= main_~x~4)) || (((main_~x~4 <= 5 && 6 <= main_~y~4) && main_~y~4 <= 6) && 5 <= main_~x~4)) || (((main_~x~4 <= 16 && 17 <= main_~y~4) && main_~y~4 <= 17) && 16 <= main_~x~4)) || (((main_~x~4 <= 7 && 7 <= main_~x~4) && 8 <= main_~y~4) && main_~y~4 <= 8)) || (((63 <= main_~x~4 && 36 <= main_~y~4) && main_~y~4 <= 36) && main_~x~4 <= 63)) || (((main_~x~4 <= 27 && main_~y~4 <= 28) && 27 <= main_~x~4) && 28 <= main_~y~4)) || (((main_~x~4 <= 10 && main_~y~4 <= 11) && 11 <= main_~y~4) && 10 <= main_~x~4)) || (((67 <= main_~x~4 && 32 <= main_~y~4) && main_~y~4 <= 32) && main_~x~4 <= 67) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 8 locations, 1 error locations. SAFE Result, 182.9s OverallTime, 47 OverallIterations, 103 TraceHistogramMax, 50.0s AutomataDifference, 0.0s DeadEndRemovalTime, 36.6s HoareAnnotationTime, HoareTripleCheckerStatistics: 523 SDtfs, 873 SDslu, 8663 SDs, 0 SdLazy, 15898 SolverSat, 1930 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10876 GetRequests, 8111 SyntacticMatches, 700 SemanticMatches, 2065 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33677 ImplicationChecksByTransitivity, 68.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4183occurred in iteration=46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.5s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 24.7s AutomataMinimizationTime, 47 MinimizatonAttempts, 2356 StatesRemovedByMinimization, 44 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 307 NumberOfFragments, 3942 HoareAnnotationTreeSize, 4 FomulaSimplifications, 2766108635522847 FormulaSimplificationTreeSizeReduction, 11.7s HoareSimplificationTime, 4 FomulaSimplificationsInter, 22234084891025 FormulaSimplificationTreeSizeReductionInter, 24.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 65.8s InterpolantComputationTime, 9623 NumberOfCodeBlocks, 9269 NumberOfCodeBlocksAsserted, 508 NumberOfCheckSat, 14139 ConstructedInterpolants, 0 QuantifiedInterpolants, 6140705 SizeOfPredicates, 59 NumberOfNonLiveVariables, 10305 ConjunctsInSsa, 1238 ConjunctsInUnsatCore, 135 InterpolantComputations, 3 PerfectInterpolantSequences, 189717/356274 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...