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_compound_exp_cong.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/PointerIncrement-simplified02.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f57a05f [2019-01-08 13:52:05,783 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-08 13:52:05,785 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-08 13:52:05,799 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-08 13:52:05,800 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-08 13:52:05,801 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-08 13:52:05,802 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-08 13:52:05,804 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-08 13:52:05,805 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-08 13:52:05,806 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-08 13:52:05,807 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-01-08 13:52:05,832 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2019-01-08 13:52:05,845 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-08 13:52:05,846 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-08 13:52:05,846 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-08 13:52:05,847 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-08 13:52:05,847 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-08 13:52:05,847 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-08 13:52:05,847 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-08 13:52:05,847 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-08 13:52:05,848 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-08 13:52:05,848 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-08 13:52:05,848 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-08 13:52:05,848 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-08 13:52:05,848 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-08 13:52:05,849 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-08 13:52:05,849 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-08 13:52:05,849 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-08 13:52:05,850 INFO L133 SettingsManager]: * Use SBE=true [2019-01-08 13:52:05,850 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-08 13:52:05,850 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-08 13:52:05,850 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-08 13:52:05,850 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-08 13:52:05,851 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-08 13:52:05,851 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-08 13:52:05,851 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-08 13:52:05,851 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-08 13:52:05,851 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-08 13:52:05,852 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-08 13:52:05,852 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-08 13:52:05,852 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-08 13:52:05,852 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-08 13:52:05,852 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-08 13:52:05,853 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-08 13:52:05,853 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-08 13:52:05,853 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-08 13:52:05,853 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-08 13:52:05,853 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-08 13:52:05,854 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-08 13:52:05,854 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in [2019-01-08 13:52:05,854 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-08 13:52:05,854 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-08 13:52:05,884 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-08 13:52:05,902 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-08 13:52:05,909 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-08 13:52:05,911 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-08 13:52:05,911 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-08 13:52:05,912 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/PointerIncrement-simplified02.bpl [2019-01-08 13:52:05,912 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/PointerIncrement-simplified02.bpl' [2019-01-08 13:52:05,955 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-08 13:52:05,957 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-08 13:52:05,958 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-08 13:52:05,958 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-08 13:52:05,958 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-08 13:52:05,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 01:52:05" (1/1) ... [2019-01-08 13:52:05,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 01:52:05" (1/1) ... [2019-01-08 13:52:06,007 WARN L165 Inliner]: Program contained no entry procedure! [2019-01-08 13:52:06,008 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-01-08 13:52:06,008 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-01-08 13:52:06,025 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-08 13:52:06,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-08 13:52:06,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-08 13:52:06,026 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-08 13:52:06,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 01:52:05" (1/1) ... [2019-01-08 13:52:06,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 01:52:05" (1/1) ... [2019-01-08 13:52:06,039 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 01:52:05" (1/1) ... [2019-01-08 13:52:06,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 01:52:05" (1/1) ... [2019-01-08 13:52:06,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 01:52:05" (1/1) ... [2019-01-08 13:52:06,048 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 01:52:05" (1/1) ... [2019-01-08 13:52:06,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 01:52:05" (1/1) ... [2019-01-08 13:52:06,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-08 13:52:06,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-08 13:52:06,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-08 13:52:06,051 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-08 13:52:06,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 01:52:05" (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:8192 -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:8192 -smt2 -in -t:2000 [2019-01-08 13:52:06,122 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-01-08 13:52:06,122 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-01-08 13:52:06,122 INFO L130 BoogieDeclarations]: Found specification of procedure ~malloc [2019-01-08 13:52:06,450 INFO L278 CfgBuilder]: Using library mode [2019-01-08 13:52:06,451 INFO L286 CfgBuilder]: Removed 3 assue(true) statements. [2019-01-08 13:52:06,452 INFO L202 PluginConnector]: Adding new model PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 01:52:06 BoogieIcfgContainer [2019-01-08 13:52:06,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-08 13:52:06,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-08 13:52:06,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-08 13:52:06,460 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-08 13:52:06,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 01:52:05" (1/2) ... [2019-01-08 13:52:06,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b61860 and model type PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 01:52:06, skipping insertion in model container [2019-01-08 13:52:06,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 01:52:06" (2/2) ... [2019-01-08 13:52:06,472 INFO L112 eAbstractionObserver]: Analyzing ICFG PointerIncrement-simplified02.bpl [2019-01-08 13:52:06,498 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-08 13:52:06,512 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-01-08 13:52:06,558 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-01-08 13:52:06,615 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-08 13:52:06,615 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-08 13:52:06,615 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-08 13:52:06,615 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-08 13:52:06,616 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-08 13:52:06,616 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-08 13:52:06,616 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-08 13:52:06,616 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-08 13:52:06,631 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2019-01-08 13:52:06,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 13:52:06,638 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:06,639 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 13:52:06,642 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:06,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:06,648 INFO L82 PathProgramCache]: Analyzing trace with hash 927590, now seen corresponding path program 1 times [2019-01-08 13:52:06,651 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:06,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:06,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:52:06,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:06,702 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:06,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:06,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:06,864 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-08 13:52:06,864 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-08 13:52:06,864 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 13:52:06,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-08 13:52:06,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-08 13:52:06,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-08 13:52:06,882 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2019-01-08 13:52:06,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:06,939 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2019-01-08 13:52:06,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-08 13:52:06,941 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-01-08 13:52:06,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:06,952 INFO L225 Difference]: With dead ends: 17 [2019-01-08 13:52:06,952 INFO L226 Difference]: Without dead ends: 10 [2019-01-08 13:52:06,956 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-08 13:52:06,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-01-08 13:52:06,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-01-08 13:52:06,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-01-08 13:52:06,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-01-08 13:52:06,992 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 4 [2019-01-08 13:52:06,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:06,993 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-01-08 13:52:06,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-08 13:52:06,993 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-01-08 13:52:06,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-01-08 13:52:06,994 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:06,994 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2019-01-08 13:52:06,995 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:06,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:06,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1951667359, now seen corresponding path program 1 times [2019-01-08 13:52:06,995 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:06,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:06,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:52:06,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:06,997 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:07,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:07,189 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:07,190 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 9 with the following transitions: [2019-01-08 13:52:07,192 INFO L207 CegarAbsIntRunner]: [0], [4], [7], [8], [9], [13] [2019-01-08 13:52:07,233 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 13:52:07,233 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 13:52:07,369 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 13:52:07,371 INFO L272 AbstractInterpreter]: Visited 6 different actions 16 times. Merged at 5 different actions 10 times. Never widened. Performed 74 root evaluator evaluations with a maximum evaluation depth of 3. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 13:52:07,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:07,381 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 13:52:07,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:07,382 INFO L193 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 [2019-01-08 13:52:07,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:52:07,396 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:52:07,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:07,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:07,476 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:07,478 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:07,495 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:07,496 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:07,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:07,570 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:07,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:07,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 13:52:07,662 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:07,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 13:52:07,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 13:52:07,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-01-08 13:52:07,663 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2019-01-08 13:52:07,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:07,798 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-01-08 13:52:07,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-08 13:52:07,799 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-01-08 13:52:07,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:07,800 INFO L225 Difference]: With dead ends: 15 [2019-01-08 13:52:07,800 INFO L226 Difference]: Without dead ends: 14 [2019-01-08 13:52:07,802 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-01-08 13:52:07,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-01-08 13:52:07,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-01-08 13:52:07,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-01-08 13:52:07,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-01-08 13:52:07,806 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8 [2019-01-08 13:52:07,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:07,807 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-01-08 13:52:07,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 13:52:07,807 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-01-08 13:52:07,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-01-08 13:52:07,808 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:07,808 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1] [2019-01-08 13:52:07,809 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:07,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:07,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1291763032, now seen corresponding path program 2 times [2019-01-08 13:52:07,810 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:07,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:07,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:52:07,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:07,811 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:08,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:08,034 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:08,034 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:08,034 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:08,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:08,035 INFO L193 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 [2019-01-08 13:52:08,054 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:52:08,054 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:52:08,102 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-08 13:52:08,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:52:08,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:08,121 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:08,122 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:08,206 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:08,207 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:08,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:08,543 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:08,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:08,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 13:52:08,634 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:08,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 13:52:08,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 13:52:08,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2019-01-08 13:52:08,636 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 8 states. [2019-01-08 13:52:08,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:08,789 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-01-08 13:52:08,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 13:52:08,790 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-01-08 13:52:08,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:08,791 INFO L225 Difference]: With dead ends: 19 [2019-01-08 13:52:08,791 INFO L226 Difference]: Without dead ends: 18 [2019-01-08 13:52:08,792 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2019-01-08 13:52:08,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-01-08 13:52:08,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-01-08 13:52:08,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-01-08 13:52:08,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-01-08 13:52:08,796 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 12 [2019-01-08 13:52:08,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:08,796 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-01-08 13:52:08,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 13:52:08,797 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-01-08 13:52:08,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-01-08 13:52:08,797 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:08,798 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1] [2019-01-08 13:52:08,798 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:08,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:08,798 INFO L82 PathProgramCache]: Analyzing trace with hash 172253585, now seen corresponding path program 3 times [2019-01-08 13:52:08,799 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:08,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:08,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:52:08,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:08,800 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:08,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:08,945 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:08,946 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:08,946 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:08,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:08,946 INFO L193 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 [2019-01-08 13:52:08,955 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:52:08,955 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:52:08,976 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:52:08,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:52:08,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:08,998 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:08,999 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:09,020 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:09,020 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:09,142 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:09,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:09,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 13:52:09,277 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:09,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 13:52:09,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 13:52:09,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=97, Unknown=0, NotChecked=0, Total=182 [2019-01-08 13:52:09,279 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 10 states. [2019-01-08 13:52:09,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:09,380 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-01-08 13:52:09,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 13:52:09,380 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-01-08 13:52:09,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:09,381 INFO L225 Difference]: With dead ends: 23 [2019-01-08 13:52:09,381 INFO L226 Difference]: Without dead ends: 22 [2019-01-08 13:52:09,382 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=97, Unknown=0, NotChecked=0, Total=182 [2019-01-08 13:52:09,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-01-08 13:52:09,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-01-08 13:52:09,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-01-08 13:52:09,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-01-08 13:52:09,386 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2019-01-08 13:52:09,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:09,386 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-01-08 13:52:09,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 13:52:09,386 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-01-08 13:52:09,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-01-08 13:52:09,387 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:09,387 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1] [2019-01-08 13:52:09,387 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:09,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:09,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1489288886, now seen corresponding path program 4 times [2019-01-08 13:52:09,388 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:09,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:09,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:52:09,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:09,389 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:09,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:09,526 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:09,526 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:09,526 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:09,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:09,526 INFO L193 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 [2019-01-08 13:52:09,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:52:09,535 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:52:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:09,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:09,568 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:09,569 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:09,581 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:09,581 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:09,810 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:10,103 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:10,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 13:52:10,103 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:10,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 13:52:10,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 13:52:10,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2019-01-08 13:52:10,104 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2019-01-08 13:52:10,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:10,182 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-01-08 13:52:10,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 13:52:10,182 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2019-01-08 13:52:10,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:10,183 INFO L225 Difference]: With dead ends: 27 [2019-01-08 13:52:10,184 INFO L226 Difference]: Without dead ends: 26 [2019-01-08 13:52:10,184 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2019-01-08 13:52:10,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-01-08 13:52:10,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-01-08 13:52:10,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-08 13:52:10,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-01-08 13:52:10,189 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 20 [2019-01-08 13:52:10,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:10,190 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-01-08 13:52:10,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 13:52:10,190 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-01-08 13:52:10,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-01-08 13:52:10,191 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:10,191 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1] [2019-01-08 13:52:10,191 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:10,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:10,192 INFO L82 PathProgramCache]: Analyzing trace with hash 702127235, now seen corresponding path program 5 times [2019-01-08 13:52:10,192 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:10,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:10,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:52:10,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:10,193 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:10,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:10,312 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:10,312 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:10,312 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:10,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:10,313 INFO L193 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 [2019-01-08 13:52:10,326 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:52:10,327 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:52:10,355 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-01-08 13:52:10,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:52:10,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:10,363 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:10,363 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:10,409 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:10,409 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:10,576 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:10,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:10,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2019-01-08 13:52:10,762 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:10,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-01-08 13:52:10,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-01-08 13:52:10,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=205, Unknown=0, NotChecked=0, Total=380 [2019-01-08 13:52:10,763 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 14 states. [2019-01-08 13:52:10,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:10,820 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-01-08 13:52:10,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 13:52:10,820 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2019-01-08 13:52:10,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:10,822 INFO L225 Difference]: With dead ends: 31 [2019-01-08 13:52:10,822 INFO L226 Difference]: Without dead ends: 30 [2019-01-08 13:52:10,823 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=205, Unknown=0, NotChecked=0, Total=380 [2019-01-08 13:52:10,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-01-08 13:52:10,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-01-08 13:52:10,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-01-08 13:52:10,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-01-08 13:52:10,828 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 24 [2019-01-08 13:52:10,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:10,829 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-01-08 13:52:10,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-01-08 13:52:10,829 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-01-08 13:52:10,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-01-08 13:52:10,830 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:10,830 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1] [2019-01-08 13:52:10,830 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:10,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:10,831 INFO L82 PathProgramCache]: Analyzing trace with hash 854963004, now seen corresponding path program 6 times [2019-01-08 13:52:10,831 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:10,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:10,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:52:10,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:10,832 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:11,090 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:11,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:11,091 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:11,091 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:11,091 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:11,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:11,092 INFO L193 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 [2019-01-08 13:52:11,100 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:52:11,100 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:52:11,121 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:52:11,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:52:11,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:11,142 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:11,143 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:11,150 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:11,151 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:11,305 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:11,306 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:11,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:11,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2019-01-08 13:52:11,458 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:11,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-01-08 13:52:11,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-01-08 13:52:11,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=274, Unknown=0, NotChecked=0, Total=506 [2019-01-08 13:52:11,459 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 16 states. [2019-01-08 13:52:11,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:11,558 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-01-08 13:52:11,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 13:52:11,559 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2019-01-08 13:52:11,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:11,561 INFO L225 Difference]: With dead ends: 35 [2019-01-08 13:52:11,561 INFO L226 Difference]: Without dead ends: 34 [2019-01-08 13:52:11,562 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=274, Unknown=0, NotChecked=0, Total=506 [2019-01-08 13:52:11,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-01-08 13:52:11,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-01-08 13:52:11,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-01-08 13:52:11,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-01-08 13:52:11,568 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 28 [2019-01-08 13:52:11,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:11,568 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-01-08 13:52:11,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-01-08 13:52:11,568 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-01-08 13:52:11,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-01-08 13:52:11,569 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:11,570 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1] [2019-01-08 13:52:11,570 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:11,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:11,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1908030091, now seen corresponding path program 7 times [2019-01-08 13:52:11,571 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:11,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:11,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:52:11,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:11,572 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:11,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:11,817 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:11,817 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:11,817 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:11,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:11,817 INFO L193 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 [2019-01-08 13:52:11,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:52:11,826 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:52:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:11,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:11,867 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:11,869 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:11,922 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:11,922 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:12,078 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:12,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:12,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2019-01-08 13:52:12,315 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:12,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-01-08 13:52:12,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-01-08 13:52:12,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=353, Unknown=0, NotChecked=0, Total=650 [2019-01-08 13:52:12,316 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 18 states. [2019-01-08 13:52:12,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:12,549 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-01-08 13:52:12,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 13:52:12,550 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 32 [2019-01-08 13:52:12,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:12,552 INFO L225 Difference]: With dead ends: 39 [2019-01-08 13:52:12,552 INFO L226 Difference]: Without dead ends: 38 [2019-01-08 13:52:12,553 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=353, Unknown=0, NotChecked=0, Total=650 [2019-01-08 13:52:12,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-01-08 13:52:12,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-01-08 13:52:12,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-01-08 13:52:12,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-01-08 13:52:12,559 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 32 [2019-01-08 13:52:12,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:12,559 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-01-08 13:52:12,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-01-08 13:52:12,560 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-01-08 13:52:12,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-01-08 13:52:12,561 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:12,561 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1] [2019-01-08 13:52:12,561 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:12,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:12,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1033891026, now seen corresponding path program 8 times [2019-01-08 13:52:12,562 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:12,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:12,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:52:12,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:12,563 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:12,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:12,708 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:12,708 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:12,709 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:12,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:12,709 INFO L193 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 [2019-01-08 13:52:12,733 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:52:12,733 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:52:12,754 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-01-08 13:52:12,755 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:52:12,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:12,763 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:12,764 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:12,774 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:12,775 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:13,212 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:13,213 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:13,651 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:13,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:13,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2019-01-08 13:52:13,671 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:13,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-01-08 13:52:13,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-01-08 13:52:13,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=442, Unknown=0, NotChecked=0, Total=812 [2019-01-08 13:52:13,672 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 20 states. [2019-01-08 13:52:13,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:13,825 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-01-08 13:52:13,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-08 13:52:13,826 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2019-01-08 13:52:13,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:13,827 INFO L225 Difference]: With dead ends: 43 [2019-01-08 13:52:13,827 INFO L226 Difference]: Without dead ends: 42 [2019-01-08 13:52:13,829 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=370, Invalid=442, Unknown=0, NotChecked=0, Total=812 [2019-01-08 13:52:13,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-01-08 13:52:13,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-01-08 13:52:13,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-01-08 13:52:13,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-01-08 13:52:13,834 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 36 [2019-01-08 13:52:13,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:13,834 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-01-08 13:52:13,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-01-08 13:52:13,835 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-01-08 13:52:13,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-01-08 13:52:13,836 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:13,836 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1] [2019-01-08 13:52:13,836 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:13,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:13,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1598366617, now seen corresponding path program 9 times [2019-01-08 13:52:13,837 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:13,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:13,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:52:13,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:13,838 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:14,152 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:14,152 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:14,152 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:14,152 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:14,152 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:14,152 INFO L193 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 [2019-01-08 13:52:14,162 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:52:14,162 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:52:14,183 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:52:14,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:52:14,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:14,190 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:14,191 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:14,200 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:14,201 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:14,442 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:14,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:14,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2019-01-08 13:52:14,796 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:14,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-01-08 13:52:14,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-01-08 13:52:14,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=541, Unknown=0, NotChecked=0, Total=992 [2019-01-08 13:52:14,798 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 22 states. [2019-01-08 13:52:14,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:14,882 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-01-08 13:52:14,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-01-08 13:52:14,882 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 40 [2019-01-08 13:52:14,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:14,884 INFO L225 Difference]: With dead ends: 47 [2019-01-08 13:52:14,884 INFO L226 Difference]: Without dead ends: 46 [2019-01-08 13:52:14,885 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=451, Invalid=541, Unknown=0, NotChecked=0, Total=992 [2019-01-08 13:52:14,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-01-08 13:52:14,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2019-01-08 13:52:14,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-01-08 13:52:14,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-01-08 13:52:14,891 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 40 [2019-01-08 13:52:14,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:14,891 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-01-08 13:52:14,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-01-08 13:52:14,892 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-01-08 13:52:14,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-01-08 13:52:14,893 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:14,893 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1] [2019-01-08 13:52:14,893 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:14,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:14,894 INFO L82 PathProgramCache]: Analyzing trace with hash -710123232, now seen corresponding path program 10 times [2019-01-08 13:52:14,894 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:14,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:14,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:52:14,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:14,895 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:15,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:15,284 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:15,284 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:15,284 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:15,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:15,284 INFO L193 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 [2019-01-08 13:52:15,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:52:15,293 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:52:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:15,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:15,330 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:15,331 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:15,338 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:15,339 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:15,598 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:15,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:15,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2019-01-08 13:52:15,855 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:15,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-01-08 13:52:15,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-01-08 13:52:15,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=650, Unknown=0, NotChecked=0, Total=1190 [2019-01-08 13:52:15,857 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 24 states. [2019-01-08 13:52:15,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:15,942 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-01-08 13:52:15,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-01-08 13:52:15,943 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 44 [2019-01-08 13:52:15,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:15,944 INFO L225 Difference]: With dead ends: 51 [2019-01-08 13:52:15,944 INFO L226 Difference]: Without dead ends: 50 [2019-01-08 13:52:15,945 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=540, Invalid=650, Unknown=0, NotChecked=0, Total=1190 [2019-01-08 13:52:15,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-01-08 13:52:15,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-01-08 13:52:15,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-01-08 13:52:15,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-01-08 13:52:15,950 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 44 [2019-01-08 13:52:15,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:15,951 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-01-08 13:52:15,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-01-08 13:52:15,951 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-01-08 13:52:15,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-01-08 13:52:15,952 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:15,952 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1] [2019-01-08 13:52:15,952 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:15,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:15,952 INFO L82 PathProgramCache]: Analyzing trace with hash 2020270425, now seen corresponding path program 11 times [2019-01-08 13:52:15,952 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:15,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:15,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:52:15,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:15,953 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:16,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:16,782 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:16,782 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:16,782 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:16,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:16,782 INFO L193 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 [2019-01-08 13:52:16,791 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:52:16,791 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:52:16,848 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-01-08 13:52:16,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:52:16,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:16,870 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:16,871 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:16,875 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:16,875 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:17,116 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:17,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:17,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2019-01-08 13:52:17,418 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:17,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-01-08 13:52:17,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-01-08 13:52:17,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=769, Unknown=0, NotChecked=0, Total=1406 [2019-01-08 13:52:17,419 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 26 states. [2019-01-08 13:52:17,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:17,510 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2019-01-08 13:52:17,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-01-08 13:52:17,510 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 48 [2019-01-08 13:52:17,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:17,511 INFO L225 Difference]: With dead ends: 55 [2019-01-08 13:52:17,511 INFO L226 Difference]: Without dead ends: 54 [2019-01-08 13:52:17,513 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=637, Invalid=769, Unknown=0, NotChecked=0, Total=1406 [2019-01-08 13:52:17,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-01-08 13:52:17,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-01-08 13:52:17,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-01-08 13:52:17,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2019-01-08 13:52:17,519 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 48 [2019-01-08 13:52:17,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:17,519 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2019-01-08 13:52:17,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-01-08 13:52:17,520 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2019-01-08 13:52:17,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-01-08 13:52:17,521 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:17,521 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1] [2019-01-08 13:52:17,521 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:17,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:17,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1693672174, now seen corresponding path program 12 times [2019-01-08 13:52:17,521 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:17,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:17,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:52:17,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:17,522 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:17,939 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:17,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:17,940 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:17,940 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:17,940 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:17,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:17,940 INFO L193 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 [2019-01-08 13:52:17,949 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:52:17,949 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:52:17,968 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:52:17,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:52:17,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:17,981 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:17,982 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:17,987 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:17,988 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:18,215 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:18,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:18,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2019-01-08 13:52:18,829 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:18,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-01-08 13:52:18,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-01-08 13:52:18,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=742, Invalid=898, Unknown=0, NotChecked=0, Total=1640 [2019-01-08 13:52:18,831 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 28 states. [2019-01-08 13:52:18,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:18,936 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2019-01-08 13:52:18,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-01-08 13:52:18,937 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 52 [2019-01-08 13:52:18,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:18,937 INFO L225 Difference]: With dead ends: 59 [2019-01-08 13:52:18,938 INFO L226 Difference]: Without dead ends: 58 [2019-01-08 13:52:18,939 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=742, Invalid=898, Unknown=0, NotChecked=0, Total=1640 [2019-01-08 13:52:18,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-01-08 13:52:18,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-01-08 13:52:18,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-01-08 13:52:18,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-01-08 13:52:18,944 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 52 [2019-01-08 13:52:18,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:18,945 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-01-08 13:52:18,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-01-08 13:52:18,945 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-01-08 13:52:18,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-01-08 13:52:18,946 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:18,946 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1] [2019-01-08 13:52:18,946 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:18,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:18,947 INFO L82 PathProgramCache]: Analyzing trace with hash -628632501, now seen corresponding path program 13 times [2019-01-08 13:52:18,947 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:18,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:18,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:52:18,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:18,948 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:19,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:19,268 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:19,269 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:19,269 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:19,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:19,269 INFO L193 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 [2019-01-08 13:52:19,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:52:19,279 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:52:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:19,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:19,310 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:19,310 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:19,320 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:19,320 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:19,533 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:20,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:20,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2019-01-08 13:52:20,514 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:20,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-01-08 13:52:20,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-01-08 13:52:20,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=855, Invalid=1037, Unknown=0, NotChecked=0, Total=1892 [2019-01-08 13:52:20,516 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 30 states. [2019-01-08 13:52:20,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:20,759 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-01-08 13:52:20,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-01-08 13:52:20,759 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 56 [2019-01-08 13:52:20,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:20,760 INFO L225 Difference]: With dead ends: 63 [2019-01-08 13:52:20,761 INFO L226 Difference]: Without dead ends: 62 [2019-01-08 13:52:20,762 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=855, Invalid=1037, Unknown=0, NotChecked=0, Total=1892 [2019-01-08 13:52:20,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-01-08 13:52:20,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-01-08 13:52:20,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-01-08 13:52:20,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-01-08 13:52:20,767 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 56 [2019-01-08 13:52:20,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:20,767 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-01-08 13:52:20,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-01-08 13:52:20,768 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-01-08 13:52:20,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-01-08 13:52:20,769 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:20,769 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1] [2019-01-08 13:52:20,769 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:20,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:20,769 INFO L82 PathProgramCache]: Analyzing trace with hash -290273532, now seen corresponding path program 14 times [2019-01-08 13:52:20,770 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:20,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:20,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:52:20,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:20,771 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:21,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:21,123 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:21,124 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:21,124 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:21,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:21,124 INFO L193 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 [2019-01-08 13:52:21,133 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:52:21,133 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:52:21,169 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-01-08 13:52:21,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:52:21,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:21,186 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:21,186 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:21,197 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:21,197 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:22,198 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:22,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:22,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2019-01-08 13:52:22,660 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:22,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-01-08 13:52:22,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-01-08 13:52:22,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=976, Invalid=1186, Unknown=0, NotChecked=0, Total=2162 [2019-01-08 13:52:22,662 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 32 states. [2019-01-08 13:52:22,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:22,908 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2019-01-08 13:52:22,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-01-08 13:52:22,909 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 60 [2019-01-08 13:52:22,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:22,910 INFO L225 Difference]: With dead ends: 67 [2019-01-08 13:52:22,910 INFO L226 Difference]: Without dead ends: 66 [2019-01-08 13:52:22,912 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=976, Invalid=1186, Unknown=0, NotChecked=0, Total=2162 [2019-01-08 13:52:22,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-01-08 13:52:22,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2019-01-08 13:52:22,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-01-08 13:52:22,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2019-01-08 13:52:22,918 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 60 [2019-01-08 13:52:22,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:22,918 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2019-01-08 13:52:22,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-01-08 13:52:22,919 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2019-01-08 13:52:22,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-01-08 13:52:22,920 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:22,920 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1] [2019-01-08 13:52:22,920 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:22,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:22,921 INFO L82 PathProgramCache]: Analyzing trace with hash 977515837, now seen corresponding path program 15 times [2019-01-08 13:52:22,921 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:22,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:22,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:52:22,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:22,922 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:23,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:23,532 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:23,533 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:23,533 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:23,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:23,533 INFO L193 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 [2019-01-08 13:52:23,550 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:52:23,550 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:52:23,570 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:52:23,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:52:23,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:23,582 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:23,583 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:23,587 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:23,587 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:24,109 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:24,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:24,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2019-01-08 13:52:24,505 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:24,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-01-08 13:52:24,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-01-08 13:52:24,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1105, Invalid=1345, Unknown=0, NotChecked=0, Total=2450 [2019-01-08 13:52:24,507 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 34 states. [2019-01-08 13:52:24,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:24,628 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2019-01-08 13:52:24,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-01-08 13:52:24,629 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 64 [2019-01-08 13:52:24,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:24,630 INFO L225 Difference]: With dead ends: 71 [2019-01-08 13:52:24,630 INFO L226 Difference]: Without dead ends: 70 [2019-01-08 13:52:24,631 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1105, Invalid=1345, Unknown=0, NotChecked=0, Total=2450 [2019-01-08 13:52:24,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-01-08 13:52:24,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2019-01-08 13:52:24,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-01-08 13:52:24,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2019-01-08 13:52:24,636 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 64 [2019-01-08 13:52:24,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:24,637 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2019-01-08 13:52:24,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-01-08 13:52:24,637 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2019-01-08 13:52:24,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-01-08 13:52:24,638 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:24,638 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1] [2019-01-08 13:52:24,638 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:24,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:24,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1523638006, now seen corresponding path program 16 times [2019-01-08 13:52:24,639 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:24,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:24,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:52:24,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:24,640 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:24,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:24,910 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:24,910 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:24,910 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:24,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:24,910 INFO L193 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 [2019-01-08 13:52:24,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:52:24,919 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:52:24,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:24,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:24,962 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:24,963 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:24,976 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:24,977 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:25,818 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:26,828 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:26,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:26,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2019-01-08 13:52:26,847 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:26,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-01-08 13:52:26,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-01-08 13:52:26,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=1514, Unknown=0, NotChecked=0, Total=2756 [2019-01-08 13:52:26,849 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 36 states. [2019-01-08 13:52:26,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:26,958 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2019-01-08 13:52:26,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-01-08 13:52:26,959 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 68 [2019-01-08 13:52:26,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:26,960 INFO L225 Difference]: With dead ends: 75 [2019-01-08 13:52:26,960 INFO L226 Difference]: Without dead ends: 74 [2019-01-08 13:52:26,962 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1242, Invalid=1514, Unknown=0, NotChecked=0, Total=2756 [2019-01-08 13:52:26,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-01-08 13:52:26,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-01-08 13:52:26,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-01-08 13:52:26,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2019-01-08 13:52:26,967 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 68 [2019-01-08 13:52:26,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:26,967 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2019-01-08 13:52:26,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-01-08 13:52:26,967 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2019-01-08 13:52:26,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-01-08 13:52:26,968 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:26,968 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1] [2019-01-08 13:52:26,969 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:26,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:26,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1194294225, now seen corresponding path program 17 times [2019-01-08 13:52:26,969 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:26,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:26,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:52:26,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:26,970 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:27,294 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:27,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:27,295 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:27,295 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:27,295 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:27,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:27,295 INFO L193 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 [2019-01-08 13:52:27,304 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:52:27,305 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:52:27,361 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-01-08 13:52:27,361 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:52:27,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:27,386 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:27,387 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:27,393 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:27,393 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:27,685 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:28,126 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:28,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:28,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2019-01-08 13:52:28,145 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:28,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-01-08 13:52:28,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-01-08 13:52:28,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1387, Invalid=1693, Unknown=0, NotChecked=0, Total=3080 [2019-01-08 13:52:28,147 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 38 states. [2019-01-08 13:52:28,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:28,268 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2019-01-08 13:52:28,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-01-08 13:52:28,269 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 72 [2019-01-08 13:52:28,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:28,270 INFO L225 Difference]: With dead ends: 79 [2019-01-08 13:52:28,270 INFO L226 Difference]: Without dead ends: 78 [2019-01-08 13:52:28,272 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1387, Invalid=1693, Unknown=0, NotChecked=0, Total=3080 [2019-01-08 13:52:28,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-01-08 13:52:28,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-01-08 13:52:28,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-01-08 13:52:28,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2019-01-08 13:52:28,277 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 72 [2019-01-08 13:52:28,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:28,277 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2019-01-08 13:52:28,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-01-08 13:52:28,277 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2019-01-08 13:52:28,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-01-08 13:52:28,278 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:28,278 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1] [2019-01-08 13:52:28,279 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:28,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:28,279 INFO L82 PathProgramCache]: Analyzing trace with hash 395896040, now seen corresponding path program 18 times [2019-01-08 13:52:28,279 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:28,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:28,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:52:28,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:28,280 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:28,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:28,621 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:28,621 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:28,621 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:28,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:28,622 INFO L193 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 [2019-01-08 13:52:28,631 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:52:28,631 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:52:28,655 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:52:28,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:52:28,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:28,665 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:28,665 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:28,674 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:28,674 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:29,445 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:30,085 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:30,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2019-01-08 13:52:30,086 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:30,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-01-08 13:52:30,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-01-08 13:52:30,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1882, Unknown=0, NotChecked=0, Total=3422 [2019-01-08 13:52:30,088 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 40 states. [2019-01-08 13:52:30,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:30,241 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2019-01-08 13:52:30,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-01-08 13:52:30,241 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 76 [2019-01-08 13:52:30,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:30,242 INFO L225 Difference]: With dead ends: 83 [2019-01-08 13:52:30,242 INFO L226 Difference]: Without dead ends: 82 [2019-01-08 13:52:30,244 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1540, Invalid=1882, Unknown=0, NotChecked=0, Total=3422 [2019-01-08 13:52:30,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-01-08 13:52:30,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2019-01-08 13:52:30,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-01-08 13:52:30,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2019-01-08 13:52:30,249 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 76 [2019-01-08 13:52:30,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:30,249 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2019-01-08 13:52:30,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-01-08 13:52:30,249 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2019-01-08 13:52:30,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-01-08 13:52:30,250 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:30,250 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1] [2019-01-08 13:52:30,250 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:30,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:30,251 INFO L82 PathProgramCache]: Analyzing trace with hash 627065121, now seen corresponding path program 19 times [2019-01-08 13:52:30,251 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:30,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:30,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:52:30,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:30,252 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:30,653 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:30,653 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:30,653 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:30,653 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:30,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:30,654 INFO L193 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 [2019-01-08 13:52:30,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:52:30,663 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:52:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:30,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:30,694 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:30,695 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:30,702 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:30,702 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:31,017 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:31,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:31,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 60 [2019-01-08 13:52:31,596 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:31,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-01-08 13:52:31,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-01-08 13:52:31,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1701, Invalid=2081, Unknown=0, NotChecked=0, Total=3782 [2019-01-08 13:52:31,598 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 42 states. [2019-01-08 13:52:31,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:31,727 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2019-01-08 13:52:31,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-01-08 13:52:31,727 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 80 [2019-01-08 13:52:31,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:31,728 INFO L225 Difference]: With dead ends: 87 [2019-01-08 13:52:31,728 INFO L226 Difference]: Without dead ends: 86 [2019-01-08 13:52:31,731 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1701, Invalid=2081, Unknown=0, NotChecked=0, Total=3782 [2019-01-08 13:52:31,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-01-08 13:52:31,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-01-08 13:52:31,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-01-08 13:52:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2019-01-08 13:52:31,734 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 80 [2019-01-08 13:52:31,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:31,735 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2019-01-08 13:52:31,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-01-08 13:52:31,735 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2019-01-08 13:52:31,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-01-08 13:52:31,736 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:31,736 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1] [2019-01-08 13:52:31,736 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:31,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:31,737 INFO L82 PathProgramCache]: Analyzing trace with hash 188537050, now seen corresponding path program 20 times [2019-01-08 13:52:31,737 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:31,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:31,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:52:31,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:31,738 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:32,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:32,278 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:32,278 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:32,278 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:32,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:32,278 INFO L193 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 [2019-01-08 13:52:32,286 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:52:32,287 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:52:32,339 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-01-08 13:52:32,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:52:32,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:32,347 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:32,347 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:32,355 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:32,356 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:32,737 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:33,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:33,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 63 [2019-01-08 13:52:33,520 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:33,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-01-08 13:52:33,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-01-08 13:52:33,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1870, Invalid=2290, Unknown=0, NotChecked=0, Total=4160 [2019-01-08 13:52:33,522 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 44 states. [2019-01-08 13:52:33,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:33,693 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2019-01-08 13:52:33,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-01-08 13:52:33,693 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 84 [2019-01-08 13:52:33,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:33,694 INFO L225 Difference]: With dead ends: 91 [2019-01-08 13:52:33,695 INFO L226 Difference]: Without dead ends: 90 [2019-01-08 13:52:33,697 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1870, Invalid=2290, Unknown=0, NotChecked=0, Total=4160 [2019-01-08 13:52:33,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-01-08 13:52:33,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-01-08 13:52:33,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-01-08 13:52:33,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2019-01-08 13:52:33,700 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 84 [2019-01-08 13:52:33,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:33,700 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2019-01-08 13:52:33,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-01-08 13:52:33,700 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2019-01-08 13:52:33,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-01-08 13:52:33,701 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:33,701 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1] [2019-01-08 13:52:33,701 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:33,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:33,702 INFO L82 PathProgramCache]: Analyzing trace with hash -47911917, now seen corresponding path program 21 times [2019-01-08 13:52:33,702 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:33,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:33,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:52:33,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:33,703 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:34,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:34,316 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:34,316 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:34,316 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:34,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:34,317 INFO L193 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 [2019-01-08 13:52:34,332 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:52:34,332 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:52:34,382 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:52:34,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:52:34,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:34,404 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:34,405 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:34,480 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:34,481 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:34,861 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:35,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:35,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 66 [2019-01-08 13:52:35,778 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:35,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-01-08 13:52:35,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-01-08 13:52:35,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2047, Invalid=2509, Unknown=0, NotChecked=0, Total=4556 [2019-01-08 13:52:35,780 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 46 states. [2019-01-08 13:52:35,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:35,961 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2019-01-08 13:52:35,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-01-08 13:52:35,965 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 88 [2019-01-08 13:52:35,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:35,966 INFO L225 Difference]: With dead ends: 95 [2019-01-08 13:52:35,966 INFO L226 Difference]: Without dead ends: 94 [2019-01-08 13:52:35,967 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2047, Invalid=2509, Unknown=0, NotChecked=0, Total=4556 [2019-01-08 13:52:35,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-01-08 13:52:35,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-01-08 13:52:35,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-01-08 13:52:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2019-01-08 13:52:35,969 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 88 [2019-01-08 13:52:35,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:35,970 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2019-01-08 13:52:35,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-01-08 13:52:35,970 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2019-01-08 13:52:35,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-01-08 13:52:35,970 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:35,970 INFO L402 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1] [2019-01-08 13:52:35,971 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:35,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:35,971 INFO L82 PathProgramCache]: Analyzing trace with hash -907101492, now seen corresponding path program 22 times [2019-01-08 13:52:35,971 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:35,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:35,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:52:35,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:35,972 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:36,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:36,356 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:36,356 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:36,356 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:36,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:36,356 INFO L193 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 [2019-01-08 13:52:36,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:52:36,365 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:52:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:36,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:36,398 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:36,398 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:36,407 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:36,407 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:36,803 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:37,544 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:37,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:37,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2019-01-08 13:52:37,564 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:37,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-01-08 13:52:37,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-01-08 13:52:37,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2232, Invalid=2738, Unknown=0, NotChecked=0, Total=4970 [2019-01-08 13:52:37,566 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 48 states. [2019-01-08 13:52:37,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:37,716 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2019-01-08 13:52:37,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-01-08 13:52:37,721 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 92 [2019-01-08 13:52:37,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:37,722 INFO L225 Difference]: With dead ends: 99 [2019-01-08 13:52:37,722 INFO L226 Difference]: Without dead ends: 98 [2019-01-08 13:52:37,723 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2232, Invalid=2738, Unknown=0, NotChecked=0, Total=4970 [2019-01-08 13:52:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-01-08 13:52:37,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-01-08 13:52:37,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-01-08 13:52:37,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2019-01-08 13:52:37,726 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 92 [2019-01-08 13:52:37,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:37,726 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2019-01-08 13:52:37,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-01-08 13:52:37,727 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2019-01-08 13:52:37,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-01-08 13:52:37,727 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:37,727 INFO L402 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1] [2019-01-08 13:52:37,728 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:37,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:37,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1800439045, now seen corresponding path program 23 times [2019-01-08 13:52:37,728 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:37,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:37,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:52:37,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:37,729 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:38,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:38,159 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:38,159 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:38,159 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:38,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:38,159 INFO L193 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 [2019-01-08 13:52:38,167 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:52:38,167 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:52:38,228 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-01-08 13:52:38,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:52:38,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:38,235 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:38,235 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:38,243 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:38,243 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:38,893 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:40,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:40,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:40,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 72 [2019-01-08 13:52:40,253 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:40,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-01-08 13:52:40,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-01-08 13:52:40,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2425, Invalid=2977, Unknown=0, NotChecked=0, Total=5402 [2019-01-08 13:52:40,255 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 50 states. [2019-01-08 13:52:40,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:40,444 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2019-01-08 13:52:40,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-01-08 13:52:40,444 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 96 [2019-01-08 13:52:40,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:40,445 INFO L225 Difference]: With dead ends: 103 [2019-01-08 13:52:40,446 INFO L226 Difference]: Without dead ends: 102 [2019-01-08 13:52:40,447 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2425, Invalid=2977, Unknown=0, NotChecked=0, Total=5402 [2019-01-08 13:52:40,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-01-08 13:52:40,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2019-01-08 13:52:40,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-01-08 13:52:40,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2019-01-08 13:52:40,451 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 96 [2019-01-08 13:52:40,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:40,452 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2019-01-08 13:52:40,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-01-08 13:52:40,452 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2019-01-08 13:52:40,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-01-08 13:52:40,452 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:40,452 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1] [2019-01-08 13:52:40,453 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:40,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:40,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1780446530, now seen corresponding path program 24 times [2019-01-08 13:52:40,453 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:40,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:40,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:52:40,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:40,454 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:41,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:41,007 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:41,007 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:41,007 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:41,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:41,008 INFO L193 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 [2019-01-08 13:52:41,016 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:52:41,016 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:52:41,048 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:52:41,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:52:41,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:41,055 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:41,055 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:41,065 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:41,066 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:41,569 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:42,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:42,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2019-01-08 13:52:42,444 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:42,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-01-08 13:52:42,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-01-08 13:52:42,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2626, Invalid=3226, Unknown=0, NotChecked=0, Total=5852 [2019-01-08 13:52:42,446 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 52 states. [2019-01-08 13:52:42,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:42,635 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2019-01-08 13:52:42,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-01-08 13:52:42,635 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 100 [2019-01-08 13:52:42,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:42,636 INFO L225 Difference]: With dead ends: 107 [2019-01-08 13:52:42,636 INFO L226 Difference]: Without dead ends: 106 [2019-01-08 13:52:42,637 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2626, Invalid=3226, Unknown=0, NotChecked=0, Total=5852 [2019-01-08 13:52:42,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-01-08 13:52:42,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2019-01-08 13:52:42,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-01-08 13:52:42,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2019-01-08 13:52:42,642 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 100 [2019-01-08 13:52:42,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:42,642 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2019-01-08 13:52:42,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-01-08 13:52:42,643 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2019-01-08 13:52:42,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-01-08 13:52:42,643 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:42,643 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1] [2019-01-08 13:52:42,644 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:42,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:42,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1226116087, now seen corresponding path program 25 times [2019-01-08 13:52:42,644 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:42,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:42,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:52:42,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:42,645 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:43,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:43,210 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:43,210 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:43,210 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:43,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:43,211 INFO L193 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 [2019-01-08 13:52:43,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:52:43,219 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:52:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:43,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:43,253 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:43,254 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:43,262 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:43,262 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:43,723 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:44,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:44,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 78 [2019-01-08 13:52:44,961 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:44,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-01-08 13:52:44,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-01-08 13:52:44,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2835, Invalid=3485, Unknown=0, NotChecked=0, Total=6320 [2019-01-08 13:52:44,963 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 54 states. [2019-01-08 13:52:45,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:45,169 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2019-01-08 13:52:45,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-01-08 13:52:45,170 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 104 [2019-01-08 13:52:45,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:45,171 INFO L225 Difference]: With dead ends: 111 [2019-01-08 13:52:45,171 INFO L226 Difference]: Without dead ends: 110 [2019-01-08 13:52:45,172 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2835, Invalid=3485, Unknown=0, NotChecked=0, Total=6320 [2019-01-08 13:52:45,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-01-08 13:52:45,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-01-08 13:52:45,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-01-08 13:52:45,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2019-01-08 13:52:45,176 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 104 [2019-01-08 13:52:45,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:45,176 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2019-01-08 13:52:45,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-01-08 13:52:45,176 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2019-01-08 13:52:45,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-01-08 13:52:45,176 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:45,176 INFO L402 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1] [2019-01-08 13:52:45,177 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:45,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:45,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1598310576, now seen corresponding path program 26 times [2019-01-08 13:52:45,177 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:45,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:45,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:52:45,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:45,178 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:45,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:45,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:45,681 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:45,681 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:45,681 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:45,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:45,681 INFO L193 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 [2019-01-08 13:52:45,689 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:52:45,689 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:52:45,760 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2019-01-08 13:52:45,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:52:45,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:45,768 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:45,769 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:45,781 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:45,781 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:46,302 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:47,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:47,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2019-01-08 13:52:47,246 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:47,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-01-08 13:52:47,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-01-08 13:52:47,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3052, Invalid=3754, Unknown=0, NotChecked=0, Total=6806 [2019-01-08 13:52:47,248 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 56 states. [2019-01-08 13:52:47,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:47,428 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2019-01-08 13:52:47,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-01-08 13:52:47,429 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 108 [2019-01-08 13:52:47,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:47,430 INFO L225 Difference]: With dead ends: 115 [2019-01-08 13:52:47,430 INFO L226 Difference]: Without dead ends: 114 [2019-01-08 13:52:47,431 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2862 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3052, Invalid=3754, Unknown=0, NotChecked=0, Total=6806 [2019-01-08 13:52:47,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-01-08 13:52:47,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2019-01-08 13:52:47,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-01-08 13:52:47,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2019-01-08 13:52:47,434 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 108 [2019-01-08 13:52:47,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:47,434 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2019-01-08 13:52:47,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-01-08 13:52:47,435 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2019-01-08 13:52:47,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-01-08 13:52:47,435 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:47,435 INFO L402 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1] [2019-01-08 13:52:47,435 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:47,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:47,435 INFO L82 PathProgramCache]: Analyzing trace with hash 497320169, now seen corresponding path program 27 times [2019-01-08 13:52:47,436 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:47,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:47,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:52:47,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:47,436 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:47,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:47,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:47,926 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:47,926 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:47,927 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:47,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:47,927 INFO L193 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 [2019-01-08 13:52:47,937 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:52:47,937 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:52:47,967 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:52:47,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:52:47,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:47,987 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:47,988 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:48,026 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:48,026 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:48,673 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:50,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:50,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 84 [2019-01-08 13:52:50,038 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:50,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-01-08 13:52:50,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-01-08 13:52:50,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3277, Invalid=4033, Unknown=0, NotChecked=0, Total=7310 [2019-01-08 13:52:50,040 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 58 states. [2019-01-08 13:52:50,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:50,242 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2019-01-08 13:52:50,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-01-08 13:52:50,243 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 112 [2019-01-08 13:52:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:50,244 INFO L225 Difference]: With dead ends: 119 [2019-01-08 13:52:50,245 INFO L226 Difference]: Without dead ends: 118 [2019-01-08 13:52:50,246 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3277, Invalid=4033, Unknown=0, NotChecked=0, Total=7310 [2019-01-08 13:52:50,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-01-08 13:52:50,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2019-01-08 13:52:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-01-08 13:52:50,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2019-01-08 13:52:50,250 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 112 [2019-01-08 13:52:50,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:50,251 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2019-01-08 13:52:50,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-01-08 13:52:50,251 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2019-01-08 13:52:50,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-01-08 13:52:50,251 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:50,252 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1] [2019-01-08 13:52:50,252 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:50,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:50,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1001655134, now seen corresponding path program 28 times [2019-01-08 13:52:50,252 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:50,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:50,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:52:50,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:50,253 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:50,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:50,834 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:50,834 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:50,834 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:50,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:50,834 INFO L193 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 [2019-01-08 13:52:50,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:52:50,844 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:52:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:50,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:50,892 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:50,892 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:50,901 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:50,901 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:51,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:51,639 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:52,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:52,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 87 [2019-01-08 13:52:52,786 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:52,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-01-08 13:52:52,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-01-08 13:52:52,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3510, Invalid=4322, Unknown=0, NotChecked=0, Total=7832 [2019-01-08 13:52:52,788 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 60 states. [2019-01-08 13:52:53,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:53,001 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2019-01-08 13:52:53,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-01-08 13:52:53,002 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 116 [2019-01-08 13:52:53,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:53,003 INFO L225 Difference]: With dead ends: 123 [2019-01-08 13:52:53,003 INFO L226 Difference]: Without dead ends: 122 [2019-01-08 13:52:53,005 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3306 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3510, Invalid=4322, Unknown=0, NotChecked=0, Total=7832 [2019-01-08 13:52:53,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-01-08 13:52:53,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2019-01-08 13:52:53,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-01-08 13:52:53,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2019-01-08 13:52:53,009 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 116 [2019-01-08 13:52:53,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:53,010 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2019-01-08 13:52:53,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-01-08 13:52:53,010 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2019-01-08 13:52:53,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-01-08 13:52:53,011 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:53,011 INFO L402 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1] [2019-01-08 13:52:53,011 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:53,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:53,011 INFO L82 PathProgramCache]: Analyzing trace with hash 506520539, now seen corresponding path program 29 times [2019-01-08 13:52:53,011 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:53,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:53,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:52:53,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:53,012 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:53,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:53,586 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:53,586 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:53,586 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:53,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:53,586 INFO L193 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 [2019-01-08 13:52:53,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:52:53,601 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:52:53,688 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-01-08 13:52:53,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:52:53,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:53,714 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:53,715 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:53,801 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:53,801 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:54,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:54,414 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:55,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:55,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 90 [2019-01-08 13:52:55,860 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:55,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-01-08 13:52:55,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-01-08 13:52:55,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3751, Invalid=4621, Unknown=0, NotChecked=0, Total=8372 [2019-01-08 13:52:55,861 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 62 states. [2019-01-08 13:52:56,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:56,110 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2019-01-08 13:52:56,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-01-08 13:52:56,111 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 120 [2019-01-08 13:52:56,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:56,112 INFO L225 Difference]: With dead ends: 127 [2019-01-08 13:52:56,112 INFO L226 Difference]: Without dead ends: 126 [2019-01-08 13:52:56,113 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3540 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3751, Invalid=4621, Unknown=0, NotChecked=0, Total=8372 [2019-01-08 13:52:56,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-01-08 13:52:56,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2019-01-08 13:52:56,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-01-08 13:52:56,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2019-01-08 13:52:56,117 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 120 [2019-01-08 13:52:56,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:56,118 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2019-01-08 13:52:56,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-01-08 13:52:56,118 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2019-01-08 13:52:56,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-01-08 13:52:56,118 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:56,118 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1] [2019-01-08 13:52:56,118 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:56,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:56,119 INFO L82 PathProgramCache]: Analyzing trace with hash 287936148, now seen corresponding path program 30 times [2019-01-08 13:52:56,119 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:56,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:56,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:52:56,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:56,120 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:52:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:57,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:57,231 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:52:57,231 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:52:57,231 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:52:57,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:52:57,231 INFO L193 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 [2019-01-08 13:52:57,241 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:52:57,242 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:52:57,279 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:52:57,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:52:57,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:52:57,286 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:52:57,286 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:52:57,299 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:52:57,299 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:52:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:57,935 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:52:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:52:59,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:52:59,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 93 [2019-01-08 13:52:59,184 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:52:59,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-01-08 13:52:59,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-01-08 13:52:59,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4000, Invalid=4930, Unknown=0, NotChecked=0, Total=8930 [2019-01-08 13:52:59,186 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 64 states. [2019-01-08 13:52:59,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:52:59,428 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2019-01-08 13:52:59,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-01-08 13:52:59,428 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 124 [2019-01-08 13:52:59,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:52:59,430 INFO L225 Difference]: With dead ends: 131 [2019-01-08 13:52:59,430 INFO L226 Difference]: Without dead ends: 130 [2019-01-08 13:52:59,431 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4000, Invalid=4930, Unknown=0, NotChecked=0, Total=8930 [2019-01-08 13:52:59,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-01-08 13:52:59,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2019-01-08 13:52:59,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-01-08 13:52:59,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2019-01-08 13:52:59,435 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 124 [2019-01-08 13:52:59,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:52:59,435 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2019-01-08 13:52:59,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-01-08 13:52:59,436 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2019-01-08 13:52:59,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-01-08 13:52:59,436 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:52:59,436 INFO L402 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1] [2019-01-08 13:52:59,437 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:52:59,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:52:59,437 INFO L82 PathProgramCache]: Analyzing trace with hash 770454733, now seen corresponding path program 31 times [2019-01-08 13:52:59,437 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:52:59,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:59,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:52:59,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:52:59,438 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:52:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:53:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:00,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:00,307 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:53:00,307 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:53:00,307 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:53:00,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:00,307 INFO L193 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 [2019-01-08 13:53:00,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:53:00,316 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:53:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:53:00,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:53:00,365 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:53:00,365 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:53:00,372 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:53:00,372 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:53:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:01,194 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:53:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:02,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:53:02,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 96 [2019-01-08 13:53:02,646 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:53:02,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-01-08 13:53:02,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-01-08 13:53:02,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4257, Invalid=5249, Unknown=0, NotChecked=0, Total=9506 [2019-01-08 13:53:02,647 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 66 states. [2019-01-08 13:53:02,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:53:02,869 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2019-01-08 13:53:02,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-01-08 13:53:02,869 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 128 [2019-01-08 13:53:02,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:53:02,870 INFO L225 Difference]: With dead ends: 135 [2019-01-08 13:53:02,871 INFO L226 Difference]: Without dead ends: 134 [2019-01-08 13:53:02,872 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4032 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4257, Invalid=5249, Unknown=0, NotChecked=0, Total=9506 [2019-01-08 13:53:02,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-01-08 13:53:02,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2019-01-08 13:53:02,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-01-08 13:53:02,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2019-01-08 13:53:02,877 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 128 [2019-01-08 13:53:02,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:53:02,877 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2019-01-08 13:53:02,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-01-08 13:53:02,877 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2019-01-08 13:53:02,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-01-08 13:53:02,878 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:53:02,881 INFO L402 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1] [2019-01-08 13:53:02,881 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:53:02,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:53:02,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1074730630, now seen corresponding path program 32 times [2019-01-08 13:53:02,881 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:53:02,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:02,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:53:02,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:02,882 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:53:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:53:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:03,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:03,575 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:53:03,575 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:53:03,576 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:53:03,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:03,576 INFO L193 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 [2019-01-08 13:53:03,589 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:53:03,590 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:53:03,737 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2019-01-08 13:53:03,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:53:03,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:53:03,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:53:03,745 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:53:03,752 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:53:03,752 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:53:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:04,944 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:53:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:06,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:53:06,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 99 [2019-01-08 13:53:06,355 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:53:06,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-01-08 13:53:06,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-01-08 13:53:06,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4522, Invalid=5578, Unknown=0, NotChecked=0, Total=10100 [2019-01-08 13:53:06,357 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 68 states. [2019-01-08 13:53:06,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:53:06,590 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2019-01-08 13:53:06,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-01-08 13:53:06,590 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 132 [2019-01-08 13:53:06,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:53:06,592 INFO L225 Difference]: With dead ends: 139 [2019-01-08 13:53:06,592 INFO L226 Difference]: Without dead ends: 138 [2019-01-08 13:53:06,593 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4290 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4522, Invalid=5578, Unknown=0, NotChecked=0, Total=10100 [2019-01-08 13:53:06,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-01-08 13:53:06,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2019-01-08 13:53:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-01-08 13:53:06,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2019-01-08 13:53:06,597 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 132 [2019-01-08 13:53:06,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:53:06,598 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2019-01-08 13:53:06,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-01-08 13:53:06,598 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2019-01-08 13:53:06,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-01-08 13:53:06,599 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:53:06,599 INFO L402 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1] [2019-01-08 13:53:06,599 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:53:06,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:53:06,600 INFO L82 PathProgramCache]: Analyzing trace with hash -569871425, now seen corresponding path program 33 times [2019-01-08 13:53:06,600 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:53:06,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:06,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:53:06,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:06,601 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:53:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:53:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:08,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:08,028 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:53:08,028 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:53:08,028 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:53:08,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:08,028 INFO L193 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 [2019-01-08 13:53:08,037 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:53:08,037 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:53:08,074 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:53:08,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:53:08,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:53:08,099 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:53:08,100 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:53:08,189 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:53:08,190 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:53:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:10,054 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:53:11,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:11,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:53:11,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 102 [2019-01-08 13:53:11,582 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:53:11,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-01-08 13:53:11,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-01-08 13:53:11,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4795, Invalid=5917, Unknown=0, NotChecked=0, Total=10712 [2019-01-08 13:53:11,583 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 70 states. [2019-01-08 13:53:11,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:53:11,916 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2019-01-08 13:53:11,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-01-08 13:53:11,917 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 136 [2019-01-08 13:53:11,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:53:11,918 INFO L225 Difference]: With dead ends: 143 [2019-01-08 13:53:11,918 INFO L226 Difference]: Without dead ends: 142 [2019-01-08 13:53:11,919 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4556 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4795, Invalid=5917, Unknown=0, NotChecked=0, Total=10712 [2019-01-08 13:53:11,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-01-08 13:53:11,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2019-01-08 13:53:11,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-01-08 13:53:11,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2019-01-08 13:53:11,924 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 136 [2019-01-08 13:53:11,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:53:11,925 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2019-01-08 13:53:11,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-01-08 13:53:11,925 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2019-01-08 13:53:11,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-01-08 13:53:11,926 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:53:11,926 INFO L402 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1] [2019-01-08 13:53:11,926 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:53:11,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:53:11,927 INFO L82 PathProgramCache]: Analyzing trace with hash -114389896, now seen corresponding path program 34 times [2019-01-08 13:53:11,927 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:53:11,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:11,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:53:11,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:11,928 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:53:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:53:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:12,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:12,693 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:53:12,694 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:53:12,694 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:53:12,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:12,694 INFO L193 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 [2019-01-08 13:53:12,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:53:12,703 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:53:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:53:12,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:53:12,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:53:12,750 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:53:12,760 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:53:12,761 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:53:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:13,679 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:53:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:15,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:53:15,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 105 [2019-01-08 13:53:15,448 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:53:15,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-01-08 13:53:15,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-01-08 13:53:15,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5076, Invalid=6266, Unknown=0, NotChecked=0, Total=11342 [2019-01-08 13:53:15,449 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 72 states. [2019-01-08 13:53:15,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:53:15,884 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2019-01-08 13:53:15,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-01-08 13:53:15,884 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 140 [2019-01-08 13:53:15,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:53:15,886 INFO L225 Difference]: With dead ends: 147 [2019-01-08 13:53:15,886 INFO L226 Difference]: Without dead ends: 146 [2019-01-08 13:53:15,887 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4830 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5076, Invalid=6266, Unknown=0, NotChecked=0, Total=11342 [2019-01-08 13:53:15,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-01-08 13:53:15,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2019-01-08 13:53:15,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-01-08 13:53:15,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2019-01-08 13:53:15,892 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 140 [2019-01-08 13:53:15,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:53:15,892 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2019-01-08 13:53:15,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-01-08 13:53:15,892 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2019-01-08 13:53:15,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-01-08 13:53:15,893 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:53:15,893 INFO L402 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1] [2019-01-08 13:53:15,893 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:53:15,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:53:15,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1840750769, now seen corresponding path program 35 times [2019-01-08 13:53:15,894 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:53:15,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:15,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:53:15,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:15,895 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:53:15,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:53:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:16,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:16,842 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:53:16,842 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:53:16,842 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:53:16,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:16,843 INFO L193 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 [2019-01-08 13:53:16,852 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:53:16,852 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:53:16,965 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2019-01-08 13:53:16,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:53:16,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:53:16,972 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:53:16,973 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:53:16,988 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:53:16,989 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:53:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:17,845 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:53:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:19,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:53:19,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 108 [2019-01-08 13:53:19,551 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:53:19,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-01-08 13:53:19,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-01-08 13:53:19,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5365, Invalid=6625, Unknown=0, NotChecked=0, Total=11990 [2019-01-08 13:53:19,552 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 74 states. [2019-01-08 13:53:20,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:53:20,102 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2019-01-08 13:53:20,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-01-08 13:53:20,103 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 144 [2019-01-08 13:53:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:53:20,104 INFO L225 Difference]: With dead ends: 151 [2019-01-08 13:53:20,104 INFO L226 Difference]: Without dead ends: 150 [2019-01-08 13:53:20,104 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5112 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5365, Invalid=6625, Unknown=0, NotChecked=0, Total=11990 [2019-01-08 13:53:20,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-01-08 13:53:20,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2019-01-08 13:53:20,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-01-08 13:53:20,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2019-01-08 13:53:20,109 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 144 [2019-01-08 13:53:20,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:53:20,110 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2019-01-08 13:53:20,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-01-08 13:53:20,110 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2019-01-08 13:53:20,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-01-08 13:53:20,111 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:53:20,111 INFO L402 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1] [2019-01-08 13:53:20,111 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:53:20,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:53:20,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1833308054, now seen corresponding path program 36 times [2019-01-08 13:53:20,111 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:53:20,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:20,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:53:20,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:20,112 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:53:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:53:20,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:20,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:20,950 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:53:20,950 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:53:20,951 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:53:20,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:20,951 INFO L193 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 [2019-01-08 13:53:20,968 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:53:20,969 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:53:21,032 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:53:21,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:53:21,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:53:21,054 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:53:21,054 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:53:21,073 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:53:21,074 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:53:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:22,073 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:53:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:23,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:53:23,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 111 [2019-01-08 13:53:23,829 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:53:23,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-01-08 13:53:23,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-01-08 13:53:23,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5662, Invalid=6994, Unknown=0, NotChecked=0, Total=12656 [2019-01-08 13:53:23,831 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 76 states. [2019-01-08 13:53:24,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:53:24,201 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2019-01-08 13:53:24,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-01-08 13:53:24,202 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 148 [2019-01-08 13:53:24,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:53:24,203 INFO L225 Difference]: With dead ends: 155 [2019-01-08 13:53:24,203 INFO L226 Difference]: Without dead ends: 154 [2019-01-08 13:53:24,206 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5402 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5662, Invalid=6994, Unknown=0, NotChecked=0, Total=12656 [2019-01-08 13:53:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-01-08 13:53:24,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2019-01-08 13:53:24,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-01-08 13:53:24,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2019-01-08 13:53:24,211 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 148 [2019-01-08 13:53:24,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:53:24,212 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2019-01-08 13:53:24,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-01-08 13:53:24,212 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2019-01-08 13:53:24,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-01-08 13:53:24,213 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:53:24,213 INFO L402 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1] [2019-01-08 13:53:24,213 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:53:24,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:53:24,213 INFO L82 PathProgramCache]: Analyzing trace with hash -903103581, now seen corresponding path program 37 times [2019-01-08 13:53:24,214 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:53:24,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:24,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:53:24,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:24,217 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:53:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:53:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:26,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:26,236 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:53:26,236 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:53:26,237 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:53:26,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:26,237 INFO L193 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 [2019-01-08 13:53:26,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:53:26,246 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:53:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:53:26,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:53:26,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:53:26,325 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:53:26,414 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:53:26,414 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:53:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:27,762 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:53:29,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:29,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:53:29,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 114 [2019-01-08 13:53:29,596 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:53:29,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-01-08 13:53:29,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-01-08 13:53:29,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5967, Invalid=7373, Unknown=0, NotChecked=0, Total=13340 [2019-01-08 13:53:29,598 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 78 states. [2019-01-08 13:53:29,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:53:29,837 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2019-01-08 13:53:29,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-01-08 13:53:29,838 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 152 [2019-01-08 13:53:29,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:53:29,839 INFO L225 Difference]: With dead ends: 159 [2019-01-08 13:53:29,839 INFO L226 Difference]: Without dead ends: 158 [2019-01-08 13:53:29,841 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5700 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5967, Invalid=7373, Unknown=0, NotChecked=0, Total=13340 [2019-01-08 13:53:29,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-01-08 13:53:29,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2019-01-08 13:53:29,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-01-08 13:53:29,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2019-01-08 13:53:29,846 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 152 [2019-01-08 13:53:29,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:53:29,846 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2019-01-08 13:53:29,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-01-08 13:53:29,846 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2019-01-08 13:53:29,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-01-08 13:53:29,847 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:53:29,847 INFO L402 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1] [2019-01-08 13:53:29,847 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:53:29,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:53:29,848 INFO L82 PathProgramCache]: Analyzing trace with hash 283329116, now seen corresponding path program 38 times [2019-01-08 13:53:29,848 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:53:29,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:29,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:53:29,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:29,849 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:53:29,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:53:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:31,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:31,047 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:53:31,047 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:53:31,048 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:53:31,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:31,048 INFO L193 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 [2019-01-08 13:53:31,056 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:53:31,056 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:53:31,182 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2019-01-08 13:53:31,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:53:31,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:53:31,193 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:53:31,193 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:53:31,207 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:53:31,207 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:53:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:32,192 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:53:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:34,137 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:53:34,137 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 117 [2019-01-08 13:53:34,137 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:53:34,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2019-01-08 13:53:34,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2019-01-08 13:53:34,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6280, Invalid=7762, Unknown=0, NotChecked=0, Total=14042 [2019-01-08 13:53:34,139 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 80 states. [2019-01-08 13:53:34,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:53:34,419 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2019-01-08 13:53:34,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-01-08 13:53:34,419 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 156 [2019-01-08 13:53:34,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:53:34,420 INFO L225 Difference]: With dead ends: 163 [2019-01-08 13:53:34,420 INFO L226 Difference]: Without dead ends: 162 [2019-01-08 13:53:34,422 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6006 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6280, Invalid=7762, Unknown=0, NotChecked=0, Total=14042 [2019-01-08 13:53:34,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-01-08 13:53:34,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2019-01-08 13:53:34,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-01-08 13:53:34,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2019-01-08 13:53:34,427 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 156 [2019-01-08 13:53:34,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:53:34,428 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2019-01-08 13:53:34,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2019-01-08 13:53:34,428 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2019-01-08 13:53:34,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-01-08 13:53:34,429 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:53:34,429 INFO L402 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1] [2019-01-08 13:53:34,429 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:53:34,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:53:34,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1902721899, now seen corresponding path program 39 times [2019-01-08 13:53:34,430 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:53:34,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:34,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:53:34,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:34,431 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:53:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:53:36,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:36,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:36,522 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:53:36,522 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:53:36,522 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:53:36,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:36,523 INFO L193 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 [2019-01-08 13:53:36,530 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:53:36,530 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:53:36,587 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:53:36,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:53:36,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:53:36,602 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:53:36,602 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:53:36,610 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:53:36,610 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:53:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:37,615 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:53:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:39,723 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:53:39,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 120 [2019-01-08 13:53:39,723 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:53:39,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-01-08 13:53:39,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-01-08 13:53:39,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6601, Invalid=8161, Unknown=0, NotChecked=0, Total=14762 [2019-01-08 13:53:39,725 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 82 states. [2019-01-08 13:53:40,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:53:40,253 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2019-01-08 13:53:40,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-01-08 13:53:40,253 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 160 [2019-01-08 13:53:40,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:53:40,255 INFO L225 Difference]: With dead ends: 167 [2019-01-08 13:53:40,255 INFO L226 Difference]: Without dead ends: 166 [2019-01-08 13:53:40,256 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6320 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6601, Invalid=8161, Unknown=0, NotChecked=0, Total=14762 [2019-01-08 13:53:40,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-01-08 13:53:40,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2019-01-08 13:53:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-01-08 13:53:40,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2019-01-08 13:53:40,262 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 160 [2019-01-08 13:53:40,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:53:40,262 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2019-01-08 13:53:40,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-01-08 13:53:40,262 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2019-01-08 13:53:40,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-01-08 13:53:40,263 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:53:40,263 INFO L402 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1] [2019-01-08 13:53:40,263 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:53:40,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:53:40,264 INFO L82 PathProgramCache]: Analyzing trace with hash 635208270, now seen corresponding path program 40 times [2019-01-08 13:53:40,264 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:53:40,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:40,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:53:40,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:40,265 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:53:40,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:53:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:42,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:42,758 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:53:42,758 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:53:42,758 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:53:42,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:42,758 INFO L193 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 [2019-01-08 13:53:42,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:53:42,767 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:53:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:53:42,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:53:42,840 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:53:42,841 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:53:42,895 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:53:42,895 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:53:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:43,982 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:53:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:46,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:53:46,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 123 [2019-01-08 13:53:46,402 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:53:46,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2019-01-08 13:53:46,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2019-01-08 13:53:46,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6930, Invalid=8570, Unknown=0, NotChecked=0, Total=15500 [2019-01-08 13:53:46,404 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 84 states. [2019-01-08 13:53:46,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:53:46,680 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2019-01-08 13:53:46,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-01-08 13:53:46,681 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 164 [2019-01-08 13:53:46,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:53:46,682 INFO L225 Difference]: With dead ends: 171 [2019-01-08 13:53:46,682 INFO L226 Difference]: Without dead ends: 170 [2019-01-08 13:53:46,683 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6642 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=6930, Invalid=8570, Unknown=0, NotChecked=0, Total=15500 [2019-01-08 13:53:46,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-01-08 13:53:46,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2019-01-08 13:53:46,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-01-08 13:53:46,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2019-01-08 13:53:46,688 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 164 [2019-01-08 13:53:46,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:53:46,689 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2019-01-08 13:53:46,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2019-01-08 13:53:46,689 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2019-01-08 13:53:46,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-01-08 13:53:46,690 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:53:46,690 INFO L402 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1] [2019-01-08 13:53:46,690 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:53:46,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:53:46,690 INFO L82 PathProgramCache]: Analyzing trace with hash 69909383, now seen corresponding path program 41 times [2019-01-08 13:53:46,691 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:53:46,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:46,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:53:46,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:46,691 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:53:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:53:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:47,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:47,657 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:53:47,657 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:53:47,657 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:53:47,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:47,658 INFO L193 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 [2019-01-08 13:53:47,665 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:53:47,666 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:53:47,803 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2019-01-08 13:53:47,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:53:47,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:53:47,848 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:53:47,849 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:53:47,938 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:53:47,938 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:53:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:49,087 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:53:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:51,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:53:51,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 126 [2019-01-08 13:53:51,680 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:53:51,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2019-01-08 13:53:51,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2019-01-08 13:53:51,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7267, Invalid=8989, Unknown=0, NotChecked=0, Total=16256 [2019-01-08 13:53:51,681 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 86 states. [2019-01-08 13:53:51,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:53:51,962 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2019-01-08 13:53:51,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-01-08 13:53:51,962 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 168 [2019-01-08 13:53:51,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:53:51,964 INFO L225 Difference]: With dead ends: 175 [2019-01-08 13:53:51,964 INFO L226 Difference]: Without dead ends: 174 [2019-01-08 13:53:51,965 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6972 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7267, Invalid=8989, Unknown=0, NotChecked=0, Total=16256 [2019-01-08 13:53:51,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-01-08 13:53:51,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2019-01-08 13:53:51,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-01-08 13:53:51,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2019-01-08 13:53:51,970 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 168 [2019-01-08 13:53:51,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:53:51,970 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2019-01-08 13:53:51,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2019-01-08 13:53:51,970 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2019-01-08 13:53:51,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-01-08 13:53:51,971 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:53:51,971 INFO L402 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1] [2019-01-08 13:53:51,972 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:53:51,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:53:51,972 INFO L82 PathProgramCache]: Analyzing trace with hash 836218944, now seen corresponding path program 42 times [2019-01-08 13:53:51,972 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:53:51,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:51,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:53:51,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:51,973 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:53:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:53:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:53,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:53,065 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:53:53,065 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:53:53,065 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:53:53,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:53,066 INFO L193 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 [2019-01-08 13:53:53,074 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:53:53,075 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:53:53,124 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:53:53,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:53:53,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:53:53,143 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:53:53,143 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:53:53,157 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:53:53,158 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:53:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:54,314 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:53:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:57,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:53:57,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 129 [2019-01-08 13:53:57,036 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:53:57,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-01-08 13:53:57,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-01-08 13:53:57,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7612, Invalid=9418, Unknown=0, NotChecked=0, Total=17030 [2019-01-08 13:53:57,038 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 88 states. [2019-01-08 13:53:57,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:53:57,637 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2019-01-08 13:53:57,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-01-08 13:53:57,637 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 172 [2019-01-08 13:53:57,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:53:57,639 INFO L225 Difference]: With dead ends: 179 [2019-01-08 13:53:57,639 INFO L226 Difference]: Without dead ends: 178 [2019-01-08 13:53:57,640 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7310 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7612, Invalid=9418, Unknown=0, NotChecked=0, Total=17030 [2019-01-08 13:53:57,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-01-08 13:53:57,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2019-01-08 13:53:57,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-01-08 13:53:57,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2019-01-08 13:53:57,645 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 172 [2019-01-08 13:53:57,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:53:57,645 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2019-01-08 13:53:57,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-01-08 13:53:57,646 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2019-01-08 13:53:57,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-01-08 13:53:57,646 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:53:57,647 INFO L402 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1] [2019-01-08 13:53:57,647 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:53:57,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:53:57,647 INFO L82 PathProgramCache]: Analyzing trace with hash 572104825, now seen corresponding path program 43 times [2019-01-08 13:53:57,647 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:53:57,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:57,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:53:57,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:53:57,648 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:53:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:53:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:58,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:58,707 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:53:58,707 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:53:58,707 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:53:58,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:53:58,707 INFO L193 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 [2019-01-08 13:53:58,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:53:58,716 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:53:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:53:58,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:53:58,773 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:53:58,774 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:53:58,788 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:53:58,789 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:53:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:53:59,987 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:54:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:02,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:54:02,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 132 [2019-01-08 13:54:02,772 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:54:02,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-01-08 13:54:02,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-01-08 13:54:02,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7965, Invalid=9857, Unknown=0, NotChecked=0, Total=17822 [2019-01-08 13:54:02,774 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 90 states. [2019-01-08 13:54:03,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:54:03,062 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2019-01-08 13:54:03,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-01-08 13:54:03,063 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 176 [2019-01-08 13:54:03,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:54:03,064 INFO L225 Difference]: With dead ends: 183 [2019-01-08 13:54:03,065 INFO L226 Difference]: Without dead ends: 182 [2019-01-08 13:54:03,066 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7656 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7965, Invalid=9857, Unknown=0, NotChecked=0, Total=17822 [2019-01-08 13:54:03,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-01-08 13:54:03,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2019-01-08 13:54:03,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-01-08 13:54:03,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2019-01-08 13:54:03,070 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 176 [2019-01-08 13:54:03,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:54:03,070 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2019-01-08 13:54:03,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-01-08 13:54:03,070 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2019-01-08 13:54:03,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-01-08 13:54:03,071 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:54:03,071 INFO L402 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1] [2019-01-08 13:54:03,071 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:54:03,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:54:03,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1124518962, now seen corresponding path program 44 times [2019-01-08 13:54:03,072 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:54:03,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:54:03,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:54:03,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:54:03,073 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:54:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:54:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:04,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:54:04,555 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:54:04,555 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:54:04,556 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:54:04,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:54:04,556 INFO L193 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 [2019-01-08 13:54:04,566 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:54:04,566 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:54:04,720 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2019-01-08 13:54:04,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:54:04,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:54:04,729 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:54:04,729 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:54:04,742 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:54:04,742 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:54:05,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:05,979 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:54:08,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:08,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:54:08,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 135 [2019-01-08 13:54:08,759 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:54:08,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-01-08 13:54:08,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-01-08 13:54:08,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8326, Invalid=10306, Unknown=0, NotChecked=0, Total=18632 [2019-01-08 13:54:08,761 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 92 states. [2019-01-08 13:54:09,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:54:09,109 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2019-01-08 13:54:09,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-01-08 13:54:09,109 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 180 [2019-01-08 13:54:09,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:54:09,111 INFO L225 Difference]: With dead ends: 187 [2019-01-08 13:54:09,111 INFO L226 Difference]: Without dead ends: 186 [2019-01-08 13:54:09,112 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8010 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=8326, Invalid=10306, Unknown=0, NotChecked=0, Total=18632 [2019-01-08 13:54:09,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-01-08 13:54:09,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2019-01-08 13:54:09,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-01-08 13:54:09,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2019-01-08 13:54:09,118 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 180 [2019-01-08 13:54:09,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:54:09,118 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2019-01-08 13:54:09,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-01-08 13:54:09,118 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2019-01-08 13:54:09,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-01-08 13:54:09,119 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:54:09,119 INFO L402 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1] [2019-01-08 13:54:09,119 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:54:09,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:54:09,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1919585429, now seen corresponding path program 45 times [2019-01-08 13:54:09,120 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:54:09,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:54:09,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:54:09,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:54:09,121 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:54:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:54:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:10,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:54:10,423 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:54:10,423 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:54:10,423 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:54:10,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:54:10,424 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:54:10,432 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:54:10,433 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:54:10,485 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:54:10,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:54:10,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:54:10,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:54:10,493 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:54:10,503 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:54:10,503 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:54:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:12,040 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:54:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:14,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:54:14,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 138 [2019-01-08 13:54:14,814 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:54:14,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-01-08 13:54:14,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-01-08 13:54:14,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8695, Invalid=10765, Unknown=0, NotChecked=0, Total=19460 [2019-01-08 13:54:14,816 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 94 states. [2019-01-08 13:54:15,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:54:15,138 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2019-01-08 13:54:15,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-01-08 13:54:15,138 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 184 [2019-01-08 13:54:15,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:54:15,139 INFO L225 Difference]: With dead ends: 191 [2019-01-08 13:54:15,139 INFO L226 Difference]: Without dead ends: 190 [2019-01-08 13:54:15,141 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8372 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8695, Invalid=10765, Unknown=0, NotChecked=0, Total=19460 [2019-01-08 13:54:15,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-01-08 13:54:15,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2019-01-08 13:54:15,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-01-08 13:54:15,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2019-01-08 13:54:15,146 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 184 [2019-01-08 13:54:15,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:54:15,146 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2019-01-08 13:54:15,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-01-08 13:54:15,146 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2019-01-08 13:54:15,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2019-01-08 13:54:15,147 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:54:15,147 INFO L402 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1] [2019-01-08 13:54:15,148 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:54:15,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:54:15,148 INFO L82 PathProgramCache]: Analyzing trace with hash 362534436, now seen corresponding path program 46 times [2019-01-08 13:54:15,148 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:54:15,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:54:15,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:54:15,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:54:15,149 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:54:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:54:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:16,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:54:16,812 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:54:16,812 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:54:16,812 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:54:16,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:54:16,812 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:54:16,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:54:16,820 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:54:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:54:16,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:54:16,884 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:54:16,884 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:54:16,896 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:54:16,896 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:54:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:18,927 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:54:22,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:22,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:54:22,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 141 [2019-01-08 13:54:22,531 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:54:22,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-01-08 13:54:22,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-01-08 13:54:22,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9072, Invalid=11234, Unknown=0, NotChecked=0, Total=20306 [2019-01-08 13:54:22,533 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 96 states. [2019-01-08 13:54:22,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:54:22,955 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2019-01-08 13:54:22,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-01-08 13:54:22,955 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 188 [2019-01-08 13:54:22,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:54:22,957 INFO L225 Difference]: With dead ends: 195 [2019-01-08 13:54:22,957 INFO L226 Difference]: Without dead ends: 194 [2019-01-08 13:54:22,960 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8742 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=9072, Invalid=11234, Unknown=0, NotChecked=0, Total=20306 [2019-01-08 13:54:22,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-01-08 13:54:22,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2019-01-08 13:54:22,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2019-01-08 13:54:22,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2019-01-08 13:54:22,964 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 188 [2019-01-08 13:54:22,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:54:22,964 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2019-01-08 13:54:22,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-01-08 13:54:22,965 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2019-01-08 13:54:22,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-01-08 13:54:22,966 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:54:22,966 INFO L402 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1] [2019-01-08 13:54:22,966 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:54:22,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:54:22,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1714408355, now seen corresponding path program 47 times [2019-01-08 13:54:22,967 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:54:22,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:54:22,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:54:22,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:54:22,967 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:54:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:54:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:24,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:54:24,188 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:54:24,188 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:54:24,188 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:54:24,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:54:24,188 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:54:24,196 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:54:24,196 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:54:24,364 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2019-01-08 13:54:24,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:54:24,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:54:24,386 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:54:24,386 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:54:24,481 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:54:24,482 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:54:25,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:25,912 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:54:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:29,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:54:29,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 144 [2019-01-08 13:54:29,176 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:54:29,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-01-08 13:54:29,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-01-08 13:54:29,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9457, Invalid=11713, Unknown=0, NotChecked=0, Total=21170 [2019-01-08 13:54:29,179 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 98 states. [2019-01-08 13:54:29,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:54:29,596 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2019-01-08 13:54:29,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-01-08 13:54:29,596 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 192 [2019-01-08 13:54:29,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:54:29,597 INFO L225 Difference]: With dead ends: 199 [2019-01-08 13:54:29,597 INFO L226 Difference]: Without dead ends: 198 [2019-01-08 13:54:29,598 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9120 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=9457, Invalid=11713, Unknown=0, NotChecked=0, Total=21170 [2019-01-08 13:54:29,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-01-08 13:54:29,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2019-01-08 13:54:29,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-01-08 13:54:29,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2019-01-08 13:54:29,603 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 192 [2019-01-08 13:54:29,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:54:29,603 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2019-01-08 13:54:29,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-01-08 13:54:29,604 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2019-01-08 13:54:29,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-01-08 13:54:29,605 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:54:29,605 INFO L402 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1] [2019-01-08 13:54:29,605 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:54:29,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:54:29,606 INFO L82 PathProgramCache]: Analyzing trace with hash 331927062, now seen corresponding path program 48 times [2019-01-08 13:54:29,606 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:54:29,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:54:29,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:54:29,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:54:29,607 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:54:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:54:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:31,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:54:31,020 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:54:31,020 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:54:31,021 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:54:31,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:54:31,021 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:54:31,031 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:54:31,031 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:54:31,092 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:54:31,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:54:31,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:54:31,107 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:54:31,107 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:54:31,117 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:54:31,117 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:54:32,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:32,771 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:54:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:35,866 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:54:35,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 147 [2019-01-08 13:54:35,866 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:54:35,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-01-08 13:54:35,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-01-08 13:54:35,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9850, Invalid=12202, Unknown=0, NotChecked=0, Total=22052 [2019-01-08 13:54:35,868 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 100 states. [2019-01-08 13:54:36,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:54:36,244 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2019-01-08 13:54:36,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-01-08 13:54:36,245 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 196 [2019-01-08 13:54:36,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:54:36,246 INFO L225 Difference]: With dead ends: 203 [2019-01-08 13:54:36,246 INFO L226 Difference]: Without dead ends: 202 [2019-01-08 13:54:36,247 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9506 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9850, Invalid=12202, Unknown=0, NotChecked=0, Total=22052 [2019-01-08 13:54:36,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-01-08 13:54:36,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2019-01-08 13:54:36,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2019-01-08 13:54:36,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2019-01-08 13:54:36,252 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 196 [2019-01-08 13:54:36,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:54:36,252 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2019-01-08 13:54:36,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-01-08 13:54:36,252 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2019-01-08 13:54:36,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-01-08 13:54:36,253 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:54:36,253 INFO L402 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1] [2019-01-08 13:54:36,253 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:54:36,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:54:36,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1207690063, now seen corresponding path program 49 times [2019-01-08 13:54:36,254 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:54:36,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:54:36,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:54:36,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:54:36,255 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:54:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:54:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:37,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:54:37,835 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:54:37,835 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:54:37,836 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:54:37,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:54:37,836 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:54:37,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:54:37,847 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:54:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:54:37,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:54:37,909 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:54:37,910 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:54:37,924 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:54:37,924 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:54:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:39,454 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:54:42,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:42,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:54:42,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 150 [2019-01-08 13:54:42,981 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:54:42,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-01-08 13:54:42,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-01-08 13:54:42,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10251, Invalid=12701, Unknown=0, NotChecked=0, Total=22952 [2019-01-08 13:54:42,983 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 102 states. [2019-01-08 13:54:43,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:54:43,304 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2019-01-08 13:54:43,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-01-08 13:54:43,304 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 200 [2019-01-08 13:54:43,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:54:43,306 INFO L225 Difference]: With dead ends: 207 [2019-01-08 13:54:43,306 INFO L226 Difference]: Without dead ends: 206 [2019-01-08 13:54:43,307 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9900 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=10251, Invalid=12701, Unknown=0, NotChecked=0, Total=22952 [2019-01-08 13:54:43,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-01-08 13:54:43,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2019-01-08 13:54:43,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-01-08 13:54:43,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2019-01-08 13:54:43,313 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 200 [2019-01-08 13:54:43,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:54:43,313 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2019-01-08 13:54:43,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-01-08 13:54:43,313 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2019-01-08 13:54:43,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-01-08 13:54:43,314 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:54:43,314 INFO L402 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 1, 1] [2019-01-08 13:54:43,314 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:54:43,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:54:43,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1438626824, now seen corresponding path program 50 times [2019-01-08 13:54:43,314 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:54:43,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:54:43,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:54:43,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:54:43,315 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:54:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:54:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:44,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:54:44,786 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:54:44,786 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:54:44,787 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:54:44,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:54:44,787 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:54:44,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:54:44,796 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:54:44,979 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2019-01-08 13:54:44,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:54:44,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:54:44,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:54:44,988 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:54:45,004 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:54:45,005 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:54:46,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:46,546 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:54:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:49,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:54:49,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 151 [2019-01-08 13:54:49,957 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:54:49,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2019-01-08 13:54:49,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2019-01-08 13:54:49,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10353, Invalid=12903, Unknown=0, NotChecked=0, Total=23256 [2019-01-08 13:54:49,960 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 104 states. [2019-01-08 13:54:50,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:54:50,369 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2019-01-08 13:54:50,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-01-08 13:54:50,370 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 204 [2019-01-08 13:54:50,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:54:50,372 INFO L225 Difference]: With dead ends: 211 [2019-01-08 13:54:50,372 INFO L226 Difference]: Without dead ends: 210 [2019-01-08 13:54:50,373 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 304 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10397 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=10353, Invalid=12903, Unknown=0, NotChecked=0, Total=23256 [2019-01-08 13:54:50,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-01-08 13:54:50,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2019-01-08 13:54:50,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-01-08 13:54:50,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2019-01-08 13:54:50,378 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 204 [2019-01-08 13:54:50,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:54:50,378 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2019-01-08 13:54:50,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2019-01-08 13:54:50,379 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2019-01-08 13:54:50,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-01-08 13:54:50,380 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:54:50,380 INFO L402 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 1, 1] [2019-01-08 13:54:50,380 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:54:50,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:54:50,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1196064833, now seen corresponding path program 51 times [2019-01-08 13:54:50,380 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:54:50,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:54:50,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:54:50,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:54:50,381 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:54:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:54:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:52,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:54:52,057 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:54:52,057 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:54:52,057 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:54:52,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:54:52,057 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:54:52,065 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:54:52,066 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:54:52,142 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:54:52,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:54:52,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:54:52,166 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:54:52,167 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:54:52,270 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:54:52,270 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:54:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:55,063 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:54:58,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:54:58,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:54:58,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 152 [2019-01-08 13:54:58,762 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:54:58,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2019-01-08 13:54:58,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2019-01-08 13:54:58,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10455, Invalid=13107, Unknown=0, NotChecked=0, Total=23562 [2019-01-08 13:54:58,765 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 106 states. [2019-01-08 13:54:59,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:54:59,208 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2019-01-08 13:54:59,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-01-08 13:54:59,208 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 208 [2019-01-08 13:54:59,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:54:59,210 INFO L225 Difference]: With dead ends: 215 [2019-01-08 13:54:59,210 INFO L226 Difference]: Without dead ends: 214 [2019-01-08 13:54:59,212 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 310 SyntacticMatches, 4 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10894 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=10455, Invalid=13107, Unknown=0, NotChecked=0, Total=23562 [2019-01-08 13:54:59,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-01-08 13:54:59,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2019-01-08 13:54:59,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-01-08 13:54:59,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2019-01-08 13:54:59,218 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 208 [2019-01-08 13:54:59,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:54:59,218 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2019-01-08 13:54:59,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2019-01-08 13:54:59,218 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2019-01-08 13:54:59,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2019-01-08 13:54:59,219 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:54:59,220 INFO L402 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 1, 1] [2019-01-08 13:54:59,220 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:54:59,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:54:59,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1582135302, now seen corresponding path program 52 times [2019-01-08 13:54:59,220 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:54:59,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:54:59,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:54:59,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:54:59,221 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:54:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:55:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:55:00,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:55:00,643 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:55:00,643 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:55:00,643 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:55:00,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:55:00,643 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:55:00,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:55:00,652 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:55:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:55:00,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:55:00,729 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:55:00,729 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:55:00,776 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:55:00,776 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:55:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:55:02,492 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:55:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:55:06,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:55:06,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 153 [2019-01-08 13:55:06,056 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:55:06,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2019-01-08 13:55:06,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2019-01-08 13:55:06,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10557, Invalid=13313, Unknown=0, NotChecked=0, Total=23870 [2019-01-08 13:55:06,058 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 108 states. [2019-01-08 13:55:06,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:55:06,425 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2019-01-08 13:55:06,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-01-08 13:55:06,426 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 212 [2019-01-08 13:55:06,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:55:06,427 INFO L225 Difference]: With dead ends: 219 [2019-01-08 13:55:06,428 INFO L226 Difference]: Without dead ends: 218 [2019-01-08 13:55:06,429 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 316 SyntacticMatches, 6 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11391 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=10557, Invalid=13313, Unknown=0, NotChecked=0, Total=23870 [2019-01-08 13:55:06,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-01-08 13:55:06,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2019-01-08 13:55:06,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-01-08 13:55:06,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2019-01-08 13:55:06,433 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 212 [2019-01-08 13:55:06,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:55:06,433 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2019-01-08 13:55:06,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2019-01-08 13:55:06,433 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2019-01-08 13:55:06,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-01-08 13:55:06,434 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:55:06,435 INFO L402 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 1, 1] [2019-01-08 13:55:06,435 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:55:06,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:55:06,435 INFO L82 PathProgramCache]: Analyzing trace with hash -185726157, now seen corresponding path program 53 times [2019-01-08 13:55:06,435 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:55:06,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:55:06,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:55:06,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:55:06,436 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:55:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:55:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:55:08,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:55:08,233 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:55:08,233 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:55:08,233 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:55:08,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:55:08,233 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:55:08,242 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:55:08,242 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:55:08,451 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2019-01-08 13:55:08,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:55:08,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:55:08,460 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:55:08,460 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:55:08,468 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:55:08,469 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:55:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:55:10,203 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:55:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:55:13,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:55:13,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 154 [2019-01-08 13:55:13,751 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:55:13,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2019-01-08 13:55:13,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2019-01-08 13:55:13,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10659, Invalid=13521, Unknown=0, NotChecked=0, Total=24180 [2019-01-08 13:55:13,753 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 110 states. [2019-01-08 13:55:14,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:55:14,143 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2019-01-08 13:55:14,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-01-08 13:55:14,144 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 216 [2019-01-08 13:55:14,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:55:14,145 INFO L225 Difference]: With dead ends: 223 [2019-01-08 13:55:14,145 INFO L226 Difference]: Without dead ends: 222 [2019-01-08 13:55:14,146 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 322 SyntacticMatches, 8 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11888 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=10659, Invalid=13521, Unknown=0, NotChecked=0, Total=24180 [2019-01-08 13:55:14,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-01-08 13:55:14,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2019-01-08 13:55:14,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-01-08 13:55:14,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2019-01-08 13:55:14,150 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 216 [2019-01-08 13:55:14,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:55:14,151 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2019-01-08 13:55:14,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2019-01-08 13:55:14,151 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2019-01-08 13:55:14,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-01-08 13:55:14,152 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:55:14,152 INFO L402 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 1, 1] [2019-01-08 13:55:14,152 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:55:14,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:55:14,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1809009132, now seen corresponding path program 54 times [2019-01-08 13:55:14,152 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:55:14,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:55:14,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:55:14,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:55:14,153 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:55:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:55:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:55:15,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:55:15,727 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:55:15,727 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:55:15,727 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:55:15,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:55:15,727 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:55:15,737 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:55:15,737 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:55:15,801 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:55:15,802 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:55:15,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:55:15,811 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:55:15,811 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:55:15,819 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:55:15,819 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:55:17,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:55:17,626 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:55:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:55:21,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:55:21,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 155 [2019-01-08 13:55:21,395 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:55:21,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2019-01-08 13:55:21,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2019-01-08 13:55:21,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10761, Invalid=13731, Unknown=0, NotChecked=0, Total=24492 [2019-01-08 13:55:21,397 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 112 states. [2019-01-08 13:55:21,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:55:21,872 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2019-01-08 13:55:21,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-01-08 13:55:21,872 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 220 [2019-01-08 13:55:21,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:55:21,874 INFO L225 Difference]: With dead ends: 227 [2019-01-08 13:55:21,874 INFO L226 Difference]: Without dead ends: 226 [2019-01-08 13:55:21,875 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 328 SyntacticMatches, 10 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12385 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=10761, Invalid=13731, Unknown=0, NotChecked=0, Total=24492 [2019-01-08 13:55:21,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-01-08 13:55:21,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2019-01-08 13:55:21,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2019-01-08 13:55:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2019-01-08 13:55:21,881 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 220 [2019-01-08 13:55:21,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:55:21,881 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2019-01-08 13:55:21,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2019-01-08 13:55:21,882 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2019-01-08 13:55:21,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-01-08 13:55:21,883 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:55:21,883 INFO L402 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 1, 1] [2019-01-08 13:55:21,883 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:55:21,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:55:21,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1545110565, now seen corresponding path program 55 times [2019-01-08 13:55:21,884 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:55:21,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:55:21,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:55:21,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:55:21,884 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:55:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:55:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:55:23,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:55:23,764 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:55:23,764 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:55:23,764 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:55:23,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:55:23,764 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:55:23,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:55:23,794 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:55:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:55:23,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:55:23,869 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:55:23,869 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:55:23,877 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:55:23,877 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:55:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:55:25,772 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:55:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:55:29,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:55:29,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 156 [2019-01-08 13:55:29,448 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:55:29,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2019-01-08 13:55:29,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2019-01-08 13:55:29,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10863, Invalid=13943, Unknown=0, NotChecked=0, Total=24806 [2019-01-08 13:55:29,450 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand 114 states. [2019-01-08 13:55:29,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:55:29,918 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2019-01-08 13:55:29,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-01-08 13:55:29,919 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 224 [2019-01-08 13:55:29,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:55:29,920 INFO L225 Difference]: With dead ends: 231 [2019-01-08 13:55:29,920 INFO L226 Difference]: Without dead ends: 230 [2019-01-08 13:55:29,922 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 334 SyntacticMatches, 12 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12882 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=10863, Invalid=13943, Unknown=0, NotChecked=0, Total=24806 [2019-01-08 13:55:29,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-01-08 13:55:29,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2019-01-08 13:55:29,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2019-01-08 13:55:29,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2019-01-08 13:55:29,927 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 224 [2019-01-08 13:55:29,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:55:29,928 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2019-01-08 13:55:29,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2019-01-08 13:55:29,928 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2019-01-08 13:55:29,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-01-08 13:55:29,929 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:55:29,929 INFO L402 BasicCegarLoop]: trace histogram [57, 57, 56, 56, 1, 1] [2019-01-08 13:55:29,929 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:55:29,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:55:29,930 INFO L82 PathProgramCache]: Analyzing trace with hash -699139618, now seen corresponding path program 56 times [2019-01-08 13:55:29,930 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:55:29,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:55:29,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:55:29,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:55:29,931 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:55:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:55:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:55:31,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:55:31,536 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:55:31,536 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:55:31,537 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:55:31,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:55:31,537 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:55:31,547 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:55:31,547 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:55:31,783 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2019-01-08 13:55:31,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:55:31,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:55:31,793 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:55:31,793 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:55:31,806 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:55:31,806 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:55:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:55:34,025 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:55:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:55:37,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:55:37,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 157 [2019-01-08 13:55:37,580 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:55:37,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2019-01-08 13:55:37,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2019-01-08 13:55:37,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10965, Invalid=14157, Unknown=0, NotChecked=0, Total=25122 [2019-01-08 13:55:37,582 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand 116 states. [2019-01-08 13:55:38,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:55:38,041 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2019-01-08 13:55:38,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-01-08 13:55:38,042 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 228 [2019-01-08 13:55:38,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:55:38,043 INFO L225 Difference]: With dead ends: 235 [2019-01-08 13:55:38,043 INFO L226 Difference]: Without dead ends: 234 [2019-01-08 13:55:38,044 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 340 SyntacticMatches, 14 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13379 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=10965, Invalid=14157, Unknown=0, NotChecked=0, Total=25122 [2019-01-08 13:55:38,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2019-01-08 13:55:38,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2019-01-08 13:55:38,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2019-01-08 13:55:38,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2019-01-08 13:55:38,051 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 228 [2019-01-08 13:55:38,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:55:38,051 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2019-01-08 13:55:38,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2019-01-08 13:55:38,051 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2019-01-08 13:55:38,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-01-08 13:55:38,053 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:55:38,053 INFO L402 BasicCegarLoop]: trace histogram [58, 58, 57, 57, 1, 1] [2019-01-08 13:55:38,053 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:55:38,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:55:38,053 INFO L82 PathProgramCache]: Analyzing trace with hash 905702167, now seen corresponding path program 57 times [2019-01-08 13:55:38,053 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:55:38,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:55:38,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:55:38,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:55:38,054 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:55:38,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:55:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:55:40,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:55:40,051 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:55:40,051 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:55:40,051 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:55:40,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:55:40,051 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:55:40,059 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:55:40,059 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:55:40,126 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:55:40,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:55:40,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:55:40,138 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:55:40,138 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:55:40,147 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:55:40,148 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:55:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:55:42,267 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:55:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:55:46,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:55:46,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 158 [2019-01-08 13:55:46,027 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:55:46,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2019-01-08 13:55:46,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2019-01-08 13:55:46,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11067, Invalid=14373, Unknown=0, NotChecked=0, Total=25440 [2019-01-08 13:55:46,029 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 118 states. [2019-01-08 13:55:46,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:55:46,499 INFO L93 Difference]: Finished difference Result 239 states and 239 transitions. [2019-01-08 13:55:46,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-01-08 13:55:46,500 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 232 [2019-01-08 13:55:46,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:55:46,501 INFO L225 Difference]: With dead ends: 239 [2019-01-08 13:55:46,501 INFO L226 Difference]: Without dead ends: 238 [2019-01-08 13:55:46,502 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 346 SyntacticMatches, 16 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13876 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=11067, Invalid=14373, Unknown=0, NotChecked=0, Total=25440 [2019-01-08 13:55:46,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-01-08 13:55:46,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2019-01-08 13:55:46,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2019-01-08 13:55:46,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2019-01-08 13:55:46,506 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 232 [2019-01-08 13:55:46,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:55:46,506 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2019-01-08 13:55:46,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2019-01-08 13:55:46,506 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2019-01-08 13:55:46,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2019-01-08 13:55:46,507 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:55:46,507 INFO L402 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 1, 1] [2019-01-08 13:55:46,507 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:55:46,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:55:46,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1318676528, now seen corresponding path program 58 times [2019-01-08 13:55:46,508 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:55:46,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:55:46,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:55:46,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:55:46,508 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:55:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:55:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:55:48,226 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:55:48,226 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:55:48,226 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:55:48,227 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:55:48,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:55:48,227 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:55:48,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:55:48,237 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:55:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:55:48,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:55:48,312 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:55:48,312 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:55:48,323 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:55:48,323 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:55:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:55:50,630 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:55:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:55:54,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:55:54,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 159 [2019-01-08 13:55:54,438 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:55:54,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2019-01-08 13:55:54,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2019-01-08 13:55:54,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11169, Invalid=14591, Unknown=0, NotChecked=0, Total=25760 [2019-01-08 13:55:54,440 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 120 states. [2019-01-08 13:55:54,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:55:54,906 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2019-01-08 13:55:54,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-01-08 13:55:54,906 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 236 [2019-01-08 13:55:54,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:55:54,908 INFO L225 Difference]: With dead ends: 243 [2019-01-08 13:55:54,908 INFO L226 Difference]: Without dead ends: 242 [2019-01-08 13:55:54,909 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 352 SyntacticMatches, 18 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14373 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=11169, Invalid=14591, Unknown=0, NotChecked=0, Total=25760 [2019-01-08 13:55:54,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-01-08 13:55:54,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2019-01-08 13:55:54,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2019-01-08 13:55:54,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2019-01-08 13:55:54,913 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 236 [2019-01-08 13:55:54,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:55:54,914 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2019-01-08 13:55:54,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2019-01-08 13:55:54,914 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2019-01-08 13:55:54,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-01-08 13:55:54,915 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:55:54,915 INFO L402 BasicCegarLoop]: trace histogram [60, 60, 59, 59, 1, 1] [2019-01-08 13:55:54,915 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:55:54,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:55:54,915 INFO L82 PathProgramCache]: Analyzing trace with hash -372621303, now seen corresponding path program 59 times [2019-01-08 13:55:54,915 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:55:54,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:55:54,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:55:54,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:55:54,916 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:55:54,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:55:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:55:56,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:55:56,807 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:55:56,807 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:55:56,807 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:55:56,807 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:55:56,807 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:55:56,818 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:55:56,818 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:55:57,075 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2019-01-08 13:55:57,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:55:57,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:55:57,084 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:55:57,084 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:55:57,094 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:55:57,094 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:55:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:55:59,511 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:56:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:56:03,142 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:56:03,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 160 [2019-01-08 13:56:03,142 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:56:03,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2019-01-08 13:56:03,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2019-01-08 13:56:03,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11271, Invalid=14811, Unknown=0, NotChecked=0, Total=26082 [2019-01-08 13:56:03,144 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand 122 states. [2019-01-08 13:56:03,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:56:03,615 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2019-01-08 13:56:03,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-01-08 13:56:03,615 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 240 [2019-01-08 13:56:03,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:56:03,616 INFO L225 Difference]: With dead ends: 247 [2019-01-08 13:56:03,616 INFO L226 Difference]: Without dead ends: 246 [2019-01-08 13:56:03,617 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 358 SyntacticMatches, 20 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14870 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=11271, Invalid=14811, Unknown=0, NotChecked=0, Total=26082 [2019-01-08 13:56:03,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-01-08 13:56:03,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2019-01-08 13:56:03,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2019-01-08 13:56:03,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2019-01-08 13:56:03,623 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 240 [2019-01-08 13:56:03,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:56:03,624 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2019-01-08 13:56:03,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2019-01-08 13:56:03,624 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2019-01-08 13:56:03,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-01-08 13:56:03,625 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:56:03,625 INFO L402 BasicCegarLoop]: trace histogram [61, 61, 60, 60, 1, 1] [2019-01-08 13:56:03,625 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:56:03,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:56:03,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2067604418, now seen corresponding path program 60 times [2019-01-08 13:56:03,626 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:56:03,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:56:03,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:56:03,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:56:03,627 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:56:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:56:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:56:05,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:56:05,726 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:56:05,726 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:56:05,726 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:56:05,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:56:05,727 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:56:05,735 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:56:05,735 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:56:05,808 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:56:05,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:56:05,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:56:05,833 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:56:05,833 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:56:05,839 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:56:05,839 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:56:08,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:56:08,051 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:56:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:56:12,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:56:12,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 161 [2019-01-08 13:56:12,068 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:56:12,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2019-01-08 13:56:12,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2019-01-08 13:56:12,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11373, Invalid=15033, Unknown=0, NotChecked=0, Total=26406 [2019-01-08 13:56:12,070 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand 124 states. [2019-01-08 13:56:12,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:56:12,560 INFO L93 Difference]: Finished difference Result 251 states and 251 transitions. [2019-01-08 13:56:12,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-01-08 13:56:12,560 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 244 [2019-01-08 13:56:12,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:56:12,561 INFO L225 Difference]: With dead ends: 251 [2019-01-08 13:56:12,561 INFO L226 Difference]: Without dead ends: 250 [2019-01-08 13:56:12,562 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 364 SyntacticMatches, 22 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15367 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=11373, Invalid=15033, Unknown=0, NotChecked=0, Total=26406 [2019-01-08 13:56:12,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2019-01-08 13:56:12,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2019-01-08 13:56:12,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2019-01-08 13:56:12,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 249 transitions. [2019-01-08 13:56:12,568 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 249 transitions. Word has length 244 [2019-01-08 13:56:12,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:56:12,568 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 249 transitions. [2019-01-08 13:56:12,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2019-01-08 13:56:12,569 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 249 transitions. [2019-01-08 13:56:12,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2019-01-08 13:56:12,570 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:56:12,570 INFO L402 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 1, 1] [2019-01-08 13:56:12,570 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:56:12,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:56:12,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1934261509, now seen corresponding path program 61 times [2019-01-08 13:56:12,571 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:56:12,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:56:12,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:56:12,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:56:12,572 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:56:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:56:14,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:56:14,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:56:14,797 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:56:14,797 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:56:14,797 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:56:14,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:56:14,797 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:56:14,805 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:56:14,806 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:56:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:56:14,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:56:14,884 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:56:14,884 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:56:14,899 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:56:14,899 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:56:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:56:17,199 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:56:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:56:21,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:56:21,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 162 [2019-01-08 13:56:21,084 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:56:21,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2019-01-08 13:56:21,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2019-01-08 13:56:21,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11475, Invalid=15257, Unknown=0, NotChecked=0, Total=26732 [2019-01-08 13:56:21,086 INFO L87 Difference]: Start difference. First operand 249 states and 249 transitions. Second operand 126 states. [2019-01-08 13:56:21,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:56:21,511 INFO L93 Difference]: Finished difference Result 255 states and 255 transitions. [2019-01-08 13:56:21,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-01-08 13:56:21,512 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 248 [2019-01-08 13:56:21,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:56:21,513 INFO L225 Difference]: With dead ends: 255 [2019-01-08 13:56:21,513 INFO L226 Difference]: Without dead ends: 254 [2019-01-08 13:56:21,514 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 370 SyntacticMatches, 24 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15864 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=11475, Invalid=15257, Unknown=0, NotChecked=0, Total=26732 [2019-01-08 13:56:21,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2019-01-08 13:56:21,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2019-01-08 13:56:21,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2019-01-08 13:56:21,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2019-01-08 13:56:21,519 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 248 [2019-01-08 13:56:21,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:56:21,519 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2019-01-08 13:56:21,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2019-01-08 13:56:21,519 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2019-01-08 13:56:21,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2019-01-08 13:56:21,520 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:56:21,520 INFO L402 BasicCegarLoop]: trace histogram [63, 63, 62, 62, 1, 1] [2019-01-08 13:56:21,520 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:56:21,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:56:21,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1611242932, now seen corresponding path program 62 times [2019-01-08 13:56:21,520 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:56:21,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:56:21,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:56:21,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:56:21,521 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:56:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:56:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:56:23,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:56:23,447 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:56:23,447 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:56:23,448 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:56:23,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:56:23,448 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:56:23,457 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:56:23,457 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:56:23,737 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2019-01-08 13:56:23,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:56:23,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:56:23,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:56:23,750 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:56:23,758 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:56:23,758 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:56:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:56:26,340 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:56:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:56:30,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:56:30,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 163 [2019-01-08 13:56:30,362 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:56:30,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2019-01-08 13:56:30,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2019-01-08 13:56:30,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11577, Invalid=15483, Unknown=0, NotChecked=0, Total=27060 [2019-01-08 13:56:30,365 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand 128 states. [2019-01-08 13:56:30,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:56:30,812 INFO L93 Difference]: Finished difference Result 259 states and 259 transitions. [2019-01-08 13:56:30,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-01-08 13:56:30,812 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 252 [2019-01-08 13:56:30,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:56:30,813 INFO L225 Difference]: With dead ends: 259 [2019-01-08 13:56:30,813 INFO L226 Difference]: Without dead ends: 258 [2019-01-08 13:56:30,814 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 376 SyntacticMatches, 26 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16361 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=11577, Invalid=15483, Unknown=0, NotChecked=0, Total=27060 [2019-01-08 13:56:30,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2019-01-08 13:56:30,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2019-01-08 13:56:30,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2019-01-08 13:56:30,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2019-01-08 13:56:30,819 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 252 [2019-01-08 13:56:30,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:56:30,819 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2019-01-08 13:56:30,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2019-01-08 13:56:30,819 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2019-01-08 13:56:30,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-01-08 13:56:30,820 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:56:30,820 INFO L402 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 1, 1] [2019-01-08 13:56:30,820 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:56:30,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:56:30,821 INFO L82 PathProgramCache]: Analyzing trace with hash -504384531, now seen corresponding path program 63 times [2019-01-08 13:56:30,821 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:56:30,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:56:30,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:56:30,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:56:30,822 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:56:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:56:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:56:32,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:56:32,908 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:56:32,908 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:56:32,908 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:56:32,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:56:32,908 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:56:32,921 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:56:32,921 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:56:32,999 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:56:32,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:56:33,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:56:33,009 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:56:33,010 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:56:33,024 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:56:33,024 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:56:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:56:35,659 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:56:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:56:39,436 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:56:39,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 164 [2019-01-08 13:56:39,436 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:56:39,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2019-01-08 13:56:39,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2019-01-08 13:56:39,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11679, Invalid=15711, Unknown=0, NotChecked=0, Total=27390 [2019-01-08 13:56:39,439 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 130 states. [2019-01-08 13:56:39,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:56:39,970 INFO L93 Difference]: Finished difference Result 263 states and 263 transitions. [2019-01-08 13:56:39,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-01-08 13:56:39,970 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 256 [2019-01-08 13:56:39,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:56:39,972 INFO L225 Difference]: With dead ends: 263 [2019-01-08 13:56:39,972 INFO L226 Difference]: Without dead ends: 262 [2019-01-08 13:56:39,974 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 382 SyntacticMatches, 28 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16858 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=11679, Invalid=15711, Unknown=0, NotChecked=0, Total=27390 [2019-01-08 13:56:39,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2019-01-08 13:56:39,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2019-01-08 13:56:39,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2019-01-08 13:56:39,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 261 transitions. [2019-01-08 13:56:39,978 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 261 transitions. Word has length 256 [2019-01-08 13:56:39,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:56:39,979 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 261 transitions. [2019-01-08 13:56:39,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2019-01-08 13:56:39,979 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 261 transitions. [2019-01-08 13:56:39,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2019-01-08 13:56:39,980 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:56:39,980 INFO L402 BasicCegarLoop]: trace histogram [65, 65, 64, 64, 1, 1] [2019-01-08 13:56:39,981 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:56:39,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:56:39,981 INFO L82 PathProgramCache]: Analyzing trace with hash 972948902, now seen corresponding path program 64 times [2019-01-08 13:56:39,981 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:56:39,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:56:39,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:56:39,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:56:39,982 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:56:40,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:56:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:56:42,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:56:42,265 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:56:42,265 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:56:42,266 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:56:42,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:56:42,266 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:56:42,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:56:42,274 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:56:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:56:42,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:56:42,358 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:56:42,359 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:56:42,372 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:56:42,373 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:56:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:56:44,830 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:56:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:56:48,919 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:56:48,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 165 [2019-01-08 13:56:48,920 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:56:48,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2019-01-08 13:56:48,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2019-01-08 13:56:48,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11781, Invalid=15941, Unknown=0, NotChecked=0, Total=27722 [2019-01-08 13:56:48,922 INFO L87 Difference]: Start difference. First operand 261 states and 261 transitions. Second operand 132 states. [2019-01-08 13:56:49,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:56:49,410 INFO L93 Difference]: Finished difference Result 267 states and 267 transitions. [2019-01-08 13:56:49,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-01-08 13:56:49,411 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 260 [2019-01-08 13:56:49,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:56:49,412 INFO L225 Difference]: With dead ends: 267 [2019-01-08 13:56:49,412 INFO L226 Difference]: Without dead ends: 266 [2019-01-08 13:56:49,413 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 388 SyntacticMatches, 30 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17355 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=11781, Invalid=15941, Unknown=0, NotChecked=0, Total=27722 [2019-01-08 13:56:49,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-01-08 13:56:49,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2019-01-08 13:56:49,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2019-01-08 13:56:49,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 265 transitions. [2019-01-08 13:56:49,420 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 265 transitions. Word has length 260 [2019-01-08 13:56:49,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:56:49,420 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 265 transitions. [2019-01-08 13:56:49,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2019-01-08 13:56:49,420 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 265 transitions. [2019-01-08 13:56:49,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2019-01-08 13:56:49,422 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:56:49,422 INFO L402 BasicCegarLoop]: trace histogram [66, 66, 65, 65, 1, 1] [2019-01-08 13:56:49,422 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:56:49,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:56:49,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1521144543, now seen corresponding path program 65 times [2019-01-08 13:56:49,422 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:56:49,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:56:49,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:56:49,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:56:49,423 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:56:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:56:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:56:51,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:56:51,789 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:56:51,789 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:56:51,789 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:56:51,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:56:51,789 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:56:51,798 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:56:51,798 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:56:52,114 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2019-01-08 13:56:52,114 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:56:52,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:56:52,124 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:56:52,124 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:56:52,137 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:56:52,137 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:56:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:56:54,649 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:56:58,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:56:58,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:56:58,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 166 [2019-01-08 13:56:58,768 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:56:58,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2019-01-08 13:56:58,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2019-01-08 13:56:58,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11883, Invalid=16173, Unknown=0, NotChecked=0, Total=28056 [2019-01-08 13:56:58,770 INFO L87 Difference]: Start difference. First operand 265 states and 265 transitions. Second operand 134 states. [2019-01-08 13:56:59,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:56:59,331 INFO L93 Difference]: Finished difference Result 271 states and 271 transitions. [2019-01-08 13:56:59,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-01-08 13:56:59,331 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 264 [2019-01-08 13:56:59,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:56:59,333 INFO L225 Difference]: With dead ends: 271 [2019-01-08 13:56:59,333 INFO L226 Difference]: Without dead ends: 270 [2019-01-08 13:56:59,334 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 394 SyntacticMatches, 32 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17852 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=11883, Invalid=16173, Unknown=0, NotChecked=0, Total=28056 [2019-01-08 13:56:59,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2019-01-08 13:56:59,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 269. [2019-01-08 13:56:59,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2019-01-08 13:56:59,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 269 transitions. [2019-01-08 13:56:59,340 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 269 transitions. Word has length 264 [2019-01-08 13:56:59,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:56:59,341 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 269 transitions. [2019-01-08 13:56:59,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2019-01-08 13:56:59,341 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 269 transitions. [2019-01-08 13:56:59,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2019-01-08 13:56:59,342 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:56:59,342 INFO L402 BasicCegarLoop]: trace histogram [67, 67, 66, 66, 1, 1] [2019-01-08 13:56:59,342 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:56:59,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:56:59,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1857266792, now seen corresponding path program 66 times [2019-01-08 13:56:59,343 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:56:59,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:56:59,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:56:59,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:56:59,344 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:56:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:57:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:57:01,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:57:01,840 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:57:01,840 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:57:01,840 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:57:01,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:57:01,840 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:57:01,848 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:57:01,848 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:57:01,933 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:57:01,934 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:57:01,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:57:01,943 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:57:01,944 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:57:01,951 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:57:01,951 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:57:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:57:04,595 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:57:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:57:08,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:57:08,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 167 [2019-01-08 13:57:08,763 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:57:08,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2019-01-08 13:57:08,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2019-01-08 13:57:08,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11985, Invalid=16407, Unknown=0, NotChecked=0, Total=28392 [2019-01-08 13:57:08,766 INFO L87 Difference]: Start difference. First operand 269 states and 269 transitions. Second operand 136 states. [2019-01-08 13:57:09,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:57:09,284 INFO L93 Difference]: Finished difference Result 275 states and 275 transitions. [2019-01-08 13:57:09,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-01-08 13:57:09,285 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 268 [2019-01-08 13:57:09,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:57:09,286 INFO L225 Difference]: With dead ends: 275 [2019-01-08 13:57:09,286 INFO L226 Difference]: Without dead ends: 274 [2019-01-08 13:57:09,287 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 400 SyntacticMatches, 34 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18349 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=11985, Invalid=16407, Unknown=0, NotChecked=0, Total=28392 [2019-01-08 13:57:09,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-01-08 13:57:09,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2019-01-08 13:57:09,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2019-01-08 13:57:09,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 273 transitions. [2019-01-08 13:57:09,291 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 273 transitions. Word has length 268 [2019-01-08 13:57:09,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:57:09,292 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 273 transitions. [2019-01-08 13:57:09,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2019-01-08 13:57:09,292 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 273 transitions. [2019-01-08 13:57:09,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2019-01-08 13:57:09,293 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:57:09,293 INFO L402 BasicCegarLoop]: trace histogram [68, 68, 67, 67, 1, 1] [2019-01-08 13:57:09,293 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:57:09,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:57:09,293 INFO L82 PathProgramCache]: Analyzing trace with hash 370728913, now seen corresponding path program 67 times [2019-01-08 13:57:09,293 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:57:09,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:57:09,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:57:09,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:57:09,294 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:57:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:57:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:57:11,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:57:11,812 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:57:11,812 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:57:11,812 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:57:11,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:57:11,812 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:57:11,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:57:11,821 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:57:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:57:11,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:57:11,904 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:57:11,904 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:57:11,915 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:57:11,915 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:57:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:57:14,532 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:57:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:57:18,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:57:18,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 168 [2019-01-08 13:57:18,656 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:57:18,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2019-01-08 13:57:18,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2019-01-08 13:57:18,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12087, Invalid=16643, Unknown=0, NotChecked=0, Total=28730 [2019-01-08 13:57:18,658 INFO L87 Difference]: Start difference. First operand 273 states and 273 transitions. Second operand 138 states. [2019-01-08 13:57:19,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:57:19,255 INFO L93 Difference]: Finished difference Result 279 states and 279 transitions. [2019-01-08 13:57:19,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-01-08 13:57:19,255 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 272 [2019-01-08 13:57:19,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:57:19,257 INFO L225 Difference]: With dead ends: 279 [2019-01-08 13:57:19,257 INFO L226 Difference]: Without dead ends: 278 [2019-01-08 13:57:19,258 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 406 SyntacticMatches, 36 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18846 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=12087, Invalid=16643, Unknown=0, NotChecked=0, Total=28730 [2019-01-08 13:57:19,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-01-08 13:57:19,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2019-01-08 13:57:19,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2019-01-08 13:57:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2019-01-08 13:57:19,265 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 272 [2019-01-08 13:57:19,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:57:19,265 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2019-01-08 13:57:19,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2019-01-08 13:57:19,265 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2019-01-08 13:57:19,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2019-01-08 13:57:19,266 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:57:19,266 INFO L402 BasicCegarLoop]: trace histogram [69, 69, 68, 68, 1, 1] [2019-01-08 13:57:19,267 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:57:19,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:57:19,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1675190390, now seen corresponding path program 68 times [2019-01-08 13:57:19,267 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:57:19,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:57:19,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:57:19,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:57:19,268 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:57:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:57:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:57:21,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:57:21,804 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:57:21,804 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:57:21,804 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:57:21,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:57:21,805 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:57:21,812 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:57:21,812 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:57:22,192 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2019-01-08 13:57:22,193 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:57:22,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:57:22,204 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:57:22,205 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:57:22,215 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:57:22,215 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:57:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:57:24,991 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:57:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:57:29,181 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:57:29,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 169 [2019-01-08 13:57:29,181 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:57:29,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2019-01-08 13:57:29,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2019-01-08 13:57:29,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12189, Invalid=16881, Unknown=0, NotChecked=0, Total=29070 [2019-01-08 13:57:29,184 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand 140 states. [2019-01-08 13:57:29,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:57:29,715 INFO L93 Difference]: Finished difference Result 283 states and 283 transitions. [2019-01-08 13:57:29,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-01-08 13:57:29,715 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 276 [2019-01-08 13:57:29,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:57:29,717 INFO L225 Difference]: With dead ends: 283 [2019-01-08 13:57:29,717 INFO L226 Difference]: Without dead ends: 282 [2019-01-08 13:57:29,718 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 412 SyntacticMatches, 38 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19343 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=12189, Invalid=16881, Unknown=0, NotChecked=0, Total=29070 [2019-01-08 13:57:29,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2019-01-08 13:57:29,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2019-01-08 13:57:29,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2019-01-08 13:57:29,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 281 transitions. [2019-01-08 13:57:29,724 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 281 transitions. Word has length 276 [2019-01-08 13:57:29,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:57:29,725 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 281 transitions. [2019-01-08 13:57:29,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2019-01-08 13:57:29,725 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 281 transitions. [2019-01-08 13:57:29,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2019-01-08 13:57:29,726 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:57:29,726 INFO L402 BasicCegarLoop]: trace histogram [70, 70, 69, 69, 1, 1] [2019-01-08 13:57:29,727 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:57:29,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:57:29,727 INFO L82 PathProgramCache]: Analyzing trace with hash -513025341, now seen corresponding path program 69 times [2019-01-08 13:57:29,727 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:57:29,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:57:29,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:57:29,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:57:29,728 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:57:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:57:32,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:57:32,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:57:32,420 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:57:32,420 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:57:32,420 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:57:32,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:57:32,420 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:57:32,428 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:57:32,428 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:57:32,514 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:57:32,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:57:32,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:57:32,525 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:57:32,525 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:57:32,533 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:57:32,533 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:57:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:57:35,407 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:57:39,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:57:39,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:57:39,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 170 [2019-01-08 13:57:39,640 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:57:39,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2019-01-08 13:57:39,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2019-01-08 13:57:39,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12291, Invalid=17121, Unknown=0, NotChecked=0, Total=29412 [2019-01-08 13:57:39,643 INFO L87 Difference]: Start difference. First operand 281 states and 281 transitions. Second operand 142 states. [2019-01-08 13:57:40,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:57:40,196 INFO L93 Difference]: Finished difference Result 287 states and 287 transitions. [2019-01-08 13:57:40,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-01-08 13:57:40,197 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 280 [2019-01-08 13:57:40,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:57:40,199 INFO L225 Difference]: With dead ends: 287 [2019-01-08 13:57:40,199 INFO L226 Difference]: Without dead ends: 286 [2019-01-08 13:57:40,200 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 418 SyntacticMatches, 40 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19840 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=12291, Invalid=17121, Unknown=0, NotChecked=0, Total=29412 [2019-01-08 13:57:40,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-01-08 13:57:40,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2019-01-08 13:57:40,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2019-01-08 13:57:40,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 285 transitions. [2019-01-08 13:57:40,204 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 285 transitions. Word has length 280 [2019-01-08 13:57:40,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:57:40,204 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 285 transitions. [2019-01-08 13:57:40,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2019-01-08 13:57:40,204 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 285 transitions. [2019-01-08 13:57:40,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2019-01-08 13:57:40,205 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:57:40,205 INFO L402 BasicCegarLoop]: trace histogram [71, 71, 70, 70, 1, 1] [2019-01-08 13:57:40,206 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:57:40,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:57:40,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1052692860, now seen corresponding path program 70 times [2019-01-08 13:57:40,206 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:57:40,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:57:40,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:57:40,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:57:40,207 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:57:40,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:57:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:57:43,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:57:43,031 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:57:43,032 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:57:43,032 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:57:43,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:57:43,032 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:57:43,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:57:43,041 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:57:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:57:43,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:57:43,126 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:57:43,126 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:57:43,139 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:57:43,139 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:57:46,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:57:46,074 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:57:50,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:57:50,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:57:50,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 171 [2019-01-08 13:57:50,293 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:57:50,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2019-01-08 13:57:50,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2019-01-08 13:57:50,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12393, Invalid=17363, Unknown=0, NotChecked=0, Total=29756 [2019-01-08 13:57:50,296 INFO L87 Difference]: Start difference. First operand 285 states and 285 transitions. Second operand 144 states. [2019-01-08 13:57:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:57:50,865 INFO L93 Difference]: Finished difference Result 291 states and 291 transitions. [2019-01-08 13:57:50,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-01-08 13:57:50,866 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 284 [2019-01-08 13:57:50,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:57:50,868 INFO L225 Difference]: With dead ends: 291 [2019-01-08 13:57:50,868 INFO L226 Difference]: Without dead ends: 290 [2019-01-08 13:57:50,869 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 424 SyntacticMatches, 42 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20337 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=12393, Invalid=17363, Unknown=0, NotChecked=0, Total=29756 [2019-01-08 13:57:50,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2019-01-08 13:57:50,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2019-01-08 13:57:50,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2019-01-08 13:57:50,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 289 transitions. [2019-01-08 13:57:50,873 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 289 transitions. Word has length 284 [2019-01-08 13:57:50,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:57:50,874 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 289 transitions. [2019-01-08 13:57:50,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2019-01-08 13:57:50,874 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 289 transitions. [2019-01-08 13:57:50,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2019-01-08 13:57:50,875 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:57:50,875 INFO L402 BasicCegarLoop]: trace histogram [72, 72, 71, 71, 1, 1] [2019-01-08 13:57:50,875 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:57:50,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:57:50,875 INFO L82 PathProgramCache]: Analyzing trace with hash 936756149, now seen corresponding path program 71 times [2019-01-08 13:57:50,875 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:57:50,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:57:50,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:57:50,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:57:50,876 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:57:50,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:57:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:57:53,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:57:53,704 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:57:53,704 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:57:53,704 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:57:53,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:57:53,705 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:57:53,713 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:57:53,713 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:57:54,094 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2019-01-08 13:57:54,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:57:54,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:57:54,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:57:54,109 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:57:54,117 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:57:54,118 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:57:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:57:57,589 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:58:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:58:01,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:58:01,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 172 [2019-01-08 13:58:01,716 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:58:01,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2019-01-08 13:58:01,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2019-01-08 13:58:01,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12495, Invalid=17607, Unknown=0, NotChecked=0, Total=30102 [2019-01-08 13:58:01,719 INFO L87 Difference]: Start difference. First operand 289 states and 289 transitions. Second operand 146 states. [2019-01-08 13:58:02,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:58:02,349 INFO L93 Difference]: Finished difference Result 295 states and 295 transitions. [2019-01-08 13:58:02,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-01-08 13:58:02,350 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 288 [2019-01-08 13:58:02,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:58:02,352 INFO L225 Difference]: With dead ends: 295 [2019-01-08 13:58:02,352 INFO L226 Difference]: Without dead ends: 294 [2019-01-08 13:58:02,353 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 430 SyntacticMatches, 44 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20834 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=12495, Invalid=17607, Unknown=0, NotChecked=0, Total=30102 [2019-01-08 13:58:02,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-01-08 13:58:02,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2019-01-08 13:58:02,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2019-01-08 13:58:02,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2019-01-08 13:58:02,360 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 288 [2019-01-08 13:58:02,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:58:02,360 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2019-01-08 13:58:02,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2019-01-08 13:58:02,360 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2019-01-08 13:58:02,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2019-01-08 13:58:02,361 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:58:02,362 INFO L402 BasicCegarLoop]: trace histogram [73, 73, 72, 72, 1, 1] [2019-01-08 13:58:02,362 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:58:02,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:58:02,362 INFO L82 PathProgramCache]: Analyzing trace with hash 189198702, now seen corresponding path program 72 times [2019-01-08 13:58:02,362 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:58:02,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:58:02,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:58:02,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:58:02,363 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:58:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:58:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:58:04,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:58:04,992 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:58:04,992 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:58:04,992 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:58:04,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:58:04,993 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:58:05,001 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:58:05,001 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:58:05,100 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:58:05,100 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:58:05,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:58:05,132 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:58:05,133 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:58:05,144 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:58:05,144 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:58:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:58:08,551 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:58:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:58:12,782 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:58:12,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 173 [2019-01-08 13:58:12,782 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:58:12,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2019-01-08 13:58:12,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2019-01-08 13:58:12,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12597, Invalid=17853, Unknown=0, NotChecked=0, Total=30450 [2019-01-08 13:58:12,785 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand 148 states. [2019-01-08 13:58:13,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:58:13,445 INFO L93 Difference]: Finished difference Result 299 states and 299 transitions. [2019-01-08 13:58:13,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-01-08 13:58:13,445 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 292 [2019-01-08 13:58:13,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:58:13,447 INFO L225 Difference]: With dead ends: 299 [2019-01-08 13:58:13,447 INFO L226 Difference]: Without dead ends: 298 [2019-01-08 13:58:13,448 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 436 SyntacticMatches, 46 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21331 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=12597, Invalid=17853, Unknown=0, NotChecked=0, Total=30450 [2019-01-08 13:58:13,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2019-01-08 13:58:13,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 297. [2019-01-08 13:58:13,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2019-01-08 13:58:13,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 297 transitions. [2019-01-08 13:58:13,452 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 297 transitions. Word has length 292 [2019-01-08 13:58:13,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:58:13,453 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 297 transitions. [2019-01-08 13:58:13,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2019-01-08 13:58:13,453 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 297 transitions. [2019-01-08 13:58:13,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2019-01-08 13:58:13,454 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:58:13,454 INFO L402 BasicCegarLoop]: trace histogram [74, 74, 73, 73, 1, 1] [2019-01-08 13:58:13,454 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:58:13,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:58:13,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1116248743, now seen corresponding path program 73 times [2019-01-08 13:58:13,455 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:58:13,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:58:13,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:58:13,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:58:13,455 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:58:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:58:16,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:58:16,040 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:58:16,040 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:58:16,040 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:58:16,040 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:58:16,040 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:58:16,040 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:58:16,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:58:16,048 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:58:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:58:16,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:58:16,176 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:58:16,176 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:58:16,188 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:58:16,188 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:58:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:58:19,614 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:58:23,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:58:23,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:58:23,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 174 [2019-01-08 13:58:23,970 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:58:23,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2019-01-08 13:58:23,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2019-01-08 13:58:23,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12699, Invalid=18101, Unknown=0, NotChecked=0, Total=30800 [2019-01-08 13:58:23,972 INFO L87 Difference]: Start difference. First operand 297 states and 297 transitions. Second operand 150 states. [2019-01-08 13:58:24,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:58:24,500 INFO L93 Difference]: Finished difference Result 303 states and 303 transitions. [2019-01-08 13:58:24,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2019-01-08 13:58:24,500 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 296 [2019-01-08 13:58:24,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:58:24,502 INFO L225 Difference]: With dead ends: 303 [2019-01-08 13:58:24,502 INFO L226 Difference]: Without dead ends: 302 [2019-01-08 13:58:24,504 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 442 SyntacticMatches, 48 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21828 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=12699, Invalid=18101, Unknown=0, NotChecked=0, Total=30800 [2019-01-08 13:58:24,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2019-01-08 13:58:24,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 301. [2019-01-08 13:58:24,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-01-08 13:58:24,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 301 transitions. [2019-01-08 13:58:24,509 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 301 transitions. Word has length 296 [2019-01-08 13:58:24,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:58:24,509 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 301 transitions. [2019-01-08 13:58:24,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2019-01-08 13:58:24,509 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 301 transitions. [2019-01-08 13:58:24,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2019-01-08 13:58:24,510 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:58:24,511 INFO L402 BasicCegarLoop]: trace histogram [75, 75, 74, 74, 1, 1] [2019-01-08 13:58:24,511 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:58:24,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:58:24,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1106313056, now seen corresponding path program 74 times [2019-01-08 13:58:24,511 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:58:24,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:58:24,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:58:24,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:58:24,512 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:58:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:58:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:58:28,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:58:28,089 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:58:28,089 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:58:28,089 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:58:28,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:58:28,089 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:58:28,098 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:58:28,098 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:58:28,499 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2019-01-08 13:58:28,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:58:28,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:58:28,526 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:58:28,527 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:58:28,552 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:58:28,553 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:58:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:58:31,768 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:58:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:58:36,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:58:36,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 175 [2019-01-08 13:58:36,229 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:58:36,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2019-01-08 13:58:36,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2019-01-08 13:58:36,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12801, Invalid=18351, Unknown=0, NotChecked=0, Total=31152 [2019-01-08 13:58:36,233 INFO L87 Difference]: Start difference. First operand 301 states and 301 transitions. Second operand 152 states. [2019-01-08 13:58:36,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:58:36,888 INFO L93 Difference]: Finished difference Result 307 states and 307 transitions. [2019-01-08 13:58:36,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-01-08 13:58:36,888 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 300 [2019-01-08 13:58:36,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:58:36,890 INFO L225 Difference]: With dead ends: 307 [2019-01-08 13:58:36,890 INFO L226 Difference]: Without dead ends: 306 [2019-01-08 13:58:36,891 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 448 SyntacticMatches, 50 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22325 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=12801, Invalid=18351, Unknown=0, NotChecked=0, Total=31152 [2019-01-08 13:58:36,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2019-01-08 13:58:36,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 305. [2019-01-08 13:58:36,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2019-01-08 13:58:36,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 305 transitions. [2019-01-08 13:58:36,896 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 305 transitions. Word has length 300 [2019-01-08 13:58:36,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:58:36,897 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 305 transitions. [2019-01-08 13:58:36,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2019-01-08 13:58:36,897 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 305 transitions. [2019-01-08 13:58:36,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2019-01-08 13:58:36,898 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:58:36,898 INFO L402 BasicCegarLoop]: trace histogram [76, 76, 75, 75, 1, 1] [2019-01-08 13:58:36,898 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:58:36,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:58:36,898 INFO L82 PathProgramCache]: Analyzing trace with hash -659136615, now seen corresponding path program 75 times [2019-01-08 13:58:36,898 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:58:36,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:58:36,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:58:36,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:58:36,899 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:58:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:58:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 0 proven. 11325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:58:39,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:58:39,976 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:58:39,977 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:58:39,977 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:58:39,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:58:39,977 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:58:39,985 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:58:39,985 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:58:40,080 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:58:40,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:58:40,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:58:40,091 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:58:40,091 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:58:40,099 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:58:40,099 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:58:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 0 proven. 11325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:58:43,606 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:58:47,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 0 proven. 11325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:58:47,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:58:47,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 176 [2019-01-08 13:58:47,708 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:58:47,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2019-01-08 13:58:47,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2019-01-08 13:58:47,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12903, Invalid=18603, Unknown=0, NotChecked=0, Total=31506 [2019-01-08 13:58:47,711 INFO L87 Difference]: Start difference. First operand 305 states and 305 transitions. Second operand 154 states. [2019-01-08 13:58:48,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:58:48,393 INFO L93 Difference]: Finished difference Result 311 states and 311 transitions. [2019-01-08 13:58:48,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-01-08 13:58:48,394 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 304 [2019-01-08 13:58:48,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:58:48,395 INFO L225 Difference]: With dead ends: 311 [2019-01-08 13:58:48,395 INFO L226 Difference]: Without dead ends: 310 [2019-01-08 13:58:48,396 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 454 SyntacticMatches, 52 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22822 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=12903, Invalid=18603, Unknown=0, NotChecked=0, Total=31506 [2019-01-08 13:58:48,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2019-01-08 13:58:48,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 309. [2019-01-08 13:58:48,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2019-01-08 13:58:48,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 309 transitions. [2019-01-08 13:58:48,401 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 309 transitions. Word has length 304 [2019-01-08 13:58:48,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:58:48,401 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 309 transitions. [2019-01-08 13:58:48,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2019-01-08 13:58:48,402 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 309 transitions. [2019-01-08 13:58:48,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2019-01-08 13:58:48,403 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:58:48,403 INFO L402 BasicCegarLoop]: trace histogram [77, 77, 76, 76, 1, 1] [2019-01-08 13:58:48,403 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:58:48,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:58:48,404 INFO L82 PathProgramCache]: Analyzing trace with hash -789644462, now seen corresponding path program 76 times [2019-01-08 13:58:48,404 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:58:48,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:58:48,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:58:48,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:58:48,405 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:58:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:58:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 0 proven. 11628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:58:51,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:58:51,301 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:58:51,301 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:58:51,301 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:58:51,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:58:51,301 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:58:51,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:58:51,309 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:58:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:58:51,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:58:51,400 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:58:51,400 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:58:51,409 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:58:51,409 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:58:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 0 proven. 11628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:58:55,051 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:58:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 0 proven. 11628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:58:59,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:58:59,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 177 [2019-01-08 13:58:59,418 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:58:59,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2019-01-08 13:58:59,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2019-01-08 13:58:59,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13005, Invalid=18857, Unknown=0, NotChecked=0, Total=31862 [2019-01-08 13:58:59,421 INFO L87 Difference]: Start difference. First operand 309 states and 309 transitions. Second operand 156 states. [2019-01-08 13:59:00,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:59:00,060 INFO L93 Difference]: Finished difference Result 315 states and 315 transitions. [2019-01-08 13:59:00,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-01-08 13:59:00,061 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 308 [2019-01-08 13:59:00,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:59:00,063 INFO L225 Difference]: With dead ends: 315 [2019-01-08 13:59:00,063 INFO L226 Difference]: Without dead ends: 314 [2019-01-08 13:59:00,064 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 460 SyntacticMatches, 54 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23319 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=13005, Invalid=18857, Unknown=0, NotChecked=0, Total=31862 [2019-01-08 13:59:00,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2019-01-08 13:59:00,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 313. [2019-01-08 13:59:00,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2019-01-08 13:59:00,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 313 transitions. [2019-01-08 13:59:00,069 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 313 transitions. Word has length 308 [2019-01-08 13:59:00,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:59:00,069 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 313 transitions. [2019-01-08 13:59:00,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2019-01-08 13:59:00,069 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 313 transitions. [2019-01-08 13:59:00,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2019-01-08 13:59:00,070 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:59:00,070 INFO L402 BasicCegarLoop]: trace histogram [78, 78, 77, 77, 1, 1] [2019-01-08 13:59:00,070 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:59:00,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:59:00,071 INFO L82 PathProgramCache]: Analyzing trace with hash 2140213899, now seen corresponding path program 77 times [2019-01-08 13:59:00,071 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:59:00,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:59:00,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:59:00,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:59:00,071 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:59:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:59:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:59:02,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:59:02,970 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:59:02,970 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:59:02,970 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:59:02,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:59:02,970 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:59:02,978 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:59:02,978 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:59:03,427 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 78 check-sat command(s) [2019-01-08 13:59:03,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:59:03,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:59:03,440 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:59:03,440 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:59:03,450 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:59:03,450 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:59:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:59:06,969 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:59:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:59:11,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:59:11,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 178 [2019-01-08 13:59:11,310 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:59:11,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2019-01-08 13:59:11,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2019-01-08 13:59:11,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13107, Invalid=19113, Unknown=0, NotChecked=0, Total=32220 [2019-01-08 13:59:11,313 INFO L87 Difference]: Start difference. First operand 313 states and 313 transitions. Second operand 158 states. [2019-01-08 13:59:11,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:59:11,964 INFO L93 Difference]: Finished difference Result 319 states and 319 transitions. [2019-01-08 13:59:11,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-01-08 13:59:11,965 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 312 [2019-01-08 13:59:11,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:59:11,966 INFO L225 Difference]: With dead ends: 319 [2019-01-08 13:59:11,967 INFO L226 Difference]: Without dead ends: 318 [2019-01-08 13:59:11,968 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 466 SyntacticMatches, 56 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23816 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=13107, Invalid=19113, Unknown=0, NotChecked=0, Total=32220 [2019-01-08 13:59:11,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2019-01-08 13:59:11,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 317. [2019-01-08 13:59:11,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-01-08 13:59:11,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 317 transitions. [2019-01-08 13:59:11,972 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 317 transitions. Word has length 312 [2019-01-08 13:59:11,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:59:11,973 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 317 transitions. [2019-01-08 13:59:11,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2019-01-08 13:59:11,973 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 317 transitions. [2019-01-08 13:59:11,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2019-01-08 13:59:11,974 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:59:11,974 INFO L402 BasicCegarLoop]: trace histogram [79, 79, 78, 78, 1, 1] [2019-01-08 13:59:11,974 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:59:11,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:59:11,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1416815940, now seen corresponding path program 78 times [2019-01-08 13:59:11,975 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:59:11,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:59:11,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:59:11,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:59:11,975 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:59:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:59:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 0 proven. 12246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:59:15,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:59:15,220 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:59:15,220 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:59:15,220 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:59:15,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:59:15,220 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:59:15,228 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:59:15,228 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:59:15,326 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:59:15,327 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:59:15,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:59:15,343 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:59:15,343 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:59:15,351 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:59:15,352 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:59:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 0 proven. 12246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:59:19,132 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:59:23,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 0 proven. 12246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:59:23,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:59:23,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 179 [2019-01-08 13:59:23,413 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:59:23,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2019-01-08 13:59:23,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2019-01-08 13:59:23,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13209, Invalid=19371, Unknown=0, NotChecked=0, Total=32580 [2019-01-08 13:59:23,415 INFO L87 Difference]: Start difference. First operand 317 states and 317 transitions. Second operand 160 states. [2019-01-08 13:59:24,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:59:24,209 INFO L93 Difference]: Finished difference Result 323 states and 323 transitions. [2019-01-08 13:59:24,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-01-08 13:59:24,210 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 316 [2019-01-08 13:59:24,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:59:24,212 INFO L225 Difference]: With dead ends: 323 [2019-01-08 13:59:24,212 INFO L226 Difference]: Without dead ends: 322 [2019-01-08 13:59:24,213 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 472 SyntacticMatches, 58 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24313 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=13209, Invalid=19371, Unknown=0, NotChecked=0, Total=32580 [2019-01-08 13:59:24,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2019-01-08 13:59:24,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 321. [2019-01-08 13:59:24,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-01-08 13:59:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 321 transitions. [2019-01-08 13:59:24,218 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 321 transitions. Word has length 316 [2019-01-08 13:59:24,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:59:24,218 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 321 transitions. [2019-01-08 13:59:24,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2019-01-08 13:59:24,218 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 321 transitions. [2019-01-08 13:59:24,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2019-01-08 13:59:24,219 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:59:24,220 INFO L402 BasicCegarLoop]: trace histogram [80, 80, 79, 79, 1, 1] [2019-01-08 13:59:24,220 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:59:24,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:59:24,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1783280509, now seen corresponding path program 79 times [2019-01-08 13:59:24,220 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:59:24,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:59:24,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:59:24,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:59:24,221 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:59:24,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:59:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 0 proven. 12561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:59:27,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:59:27,318 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:59:27,318 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:59:27,318 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:59:27,319 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:59:27,319 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:59:27,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:59:27,326 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:59:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:59:27,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:59:27,420 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:59:27,420 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:59:27,435 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:59:27,435 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:59:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 0 proven. 12561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:59:31,330 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:59:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 0 proven. 12561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:59:35,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:59:35,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 180 [2019-01-08 13:59:35,786 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:59:35,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2019-01-08 13:59:35,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2019-01-08 13:59:35,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13311, Invalid=19631, Unknown=0, NotChecked=0, Total=32942 [2019-01-08 13:59:35,789 INFO L87 Difference]: Start difference. First operand 321 states and 321 transitions. Second operand 162 states. [2019-01-08 13:59:36,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:59:36,449 INFO L93 Difference]: Finished difference Result 327 states and 327 transitions. [2019-01-08 13:59:36,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-01-08 13:59:36,450 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 320 [2019-01-08 13:59:36,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:59:36,451 INFO L225 Difference]: With dead ends: 327 [2019-01-08 13:59:36,451 INFO L226 Difference]: Without dead ends: 326 [2019-01-08 13:59:36,452 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 478 SyntacticMatches, 60 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24810 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=13311, Invalid=19631, Unknown=0, NotChecked=0, Total=32942 [2019-01-08 13:59:36,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-01-08 13:59:36,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 325. [2019-01-08 13:59:36,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2019-01-08 13:59:36,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 325 transitions. [2019-01-08 13:59:36,457 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 325 transitions. Word has length 320 [2019-01-08 13:59:36,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:59:36,458 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 325 transitions. [2019-01-08 13:59:36,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2019-01-08 13:59:36,458 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 325 transitions. [2019-01-08 13:59:36,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2019-01-08 13:59:36,459 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:59:36,459 INFO L402 BasicCegarLoop]: trace histogram [81, 81, 80, 80, 1, 1] [2019-01-08 13:59:36,459 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:59:36,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:59:36,459 INFO L82 PathProgramCache]: Analyzing trace with hash 380550454, now seen corresponding path program 80 times [2019-01-08 13:59:36,459 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:59:36,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:59:36,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:59:36,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:59:36,460 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:59:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:59:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:59:39,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:59:39,942 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:59:39,943 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:59:39,943 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:59:39,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:59:39,943 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:59:39,953 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 13:59:39,953 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 13:59:40,433 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2019-01-08 13:59:40,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:59:40,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:59:40,445 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:59:40,445 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:59:40,452 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:59:40,452 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:59:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:59:44,358 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:59:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:59:48,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:59:48,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 181 [2019-01-08 13:59:48,617 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:59:48,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2019-01-08 13:59:48,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2019-01-08 13:59:48,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13413, Invalid=19893, Unknown=0, NotChecked=0, Total=33306 [2019-01-08 13:59:48,619 INFO L87 Difference]: Start difference. First operand 325 states and 325 transitions. Second operand 164 states. [2019-01-08 13:59:49,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:59:49,366 INFO L93 Difference]: Finished difference Result 331 states and 331 transitions. [2019-01-08 13:59:49,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-01-08 13:59:49,367 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 324 [2019-01-08 13:59:49,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:59:49,368 INFO L225 Difference]: With dead ends: 331 [2019-01-08 13:59:49,368 INFO L226 Difference]: Without dead ends: 330 [2019-01-08 13:59:49,369 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 484 SyntacticMatches, 62 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25307 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=13413, Invalid=19893, Unknown=0, NotChecked=0, Total=33306 [2019-01-08 13:59:49,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2019-01-08 13:59:49,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 329. [2019-01-08 13:59:49,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2019-01-08 13:59:49,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 329 transitions. [2019-01-08 13:59:49,374 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 329 transitions. Word has length 324 [2019-01-08 13:59:49,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:59:49,374 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 329 transitions. [2019-01-08 13:59:49,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2019-01-08 13:59:49,374 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 329 transitions. [2019-01-08 13:59:49,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2019-01-08 13:59:49,375 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:59:49,375 INFO L402 BasicCegarLoop]: trace histogram [82, 82, 81, 81, 1, 1] [2019-01-08 13:59:49,375 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:59:49,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:59:49,376 INFO L82 PathProgramCache]: Analyzing trace with hash 2048213615, now seen corresponding path program 81 times [2019-01-08 13:59:49,376 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:59:49,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:59:49,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 13:59:49,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:59:49,377 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:59:49,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:59:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 0 proven. 13203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:59:52,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:59:52,557 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:59:52,557 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 13:59:52,557 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 13:59:52,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:59:52,558 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 13:59:52,565 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 13:59:52,565 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 13:59:52,670 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 13:59:52,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 13:59:52,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:59:52,685 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 13:59:52,685 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:59:52,695 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:59:52,695 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 13:59:56,698 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 0 proven. 13203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:59:56,698 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:00:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 0 proven. 13203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:00:01,247 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:00:01,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 182 [2019-01-08 14:00:01,247 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:00:01,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2019-01-08 14:00:01,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2019-01-08 14:00:01,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13515, Invalid=20157, Unknown=0, NotChecked=0, Total=33672 [2019-01-08 14:00:01,250 INFO L87 Difference]: Start difference. First operand 329 states and 329 transitions. Second operand 166 states. [2019-01-08 14:00:01,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:00:01,969 INFO L93 Difference]: Finished difference Result 335 states and 335 transitions. [2019-01-08 14:00:01,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-01-08 14:00:01,970 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 328 [2019-01-08 14:00:01,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:00:01,972 INFO L225 Difference]: With dead ends: 335 [2019-01-08 14:00:01,972 INFO L226 Difference]: Without dead ends: 334 [2019-01-08 14:00:01,973 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 490 SyntacticMatches, 64 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25804 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=13515, Invalid=20157, Unknown=0, NotChecked=0, Total=33672 [2019-01-08 14:00:01,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2019-01-08 14:00:01,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 333. [2019-01-08 14:00:01,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2019-01-08 14:00:01,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 333 transitions. [2019-01-08 14:00:01,978 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 333 transitions. Word has length 328 [2019-01-08 14:00:01,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:00:01,978 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 333 transitions. [2019-01-08 14:00:01,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2019-01-08 14:00:01,978 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 333 transitions. [2019-01-08 14:00:01,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2019-01-08 14:00:01,979 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:00:01,980 INFO L402 BasicCegarLoop]: trace histogram [83, 83, 82, 82, 1, 1] [2019-01-08 14:00:01,980 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:00:01,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:00:01,980 INFO L82 PathProgramCache]: Analyzing trace with hash 265585448, now seen corresponding path program 82 times [2019-01-08 14:00:01,980 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:00:01,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:00:01,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:00:01,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:00:01,981 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:00:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:00:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 13530 backedges. 0 proven. 13530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:00:05,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:00:05,513 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:00:05,513 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:00:05,513 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:00:05,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:00:05,513 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:00:05,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:00:05,523 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:00:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:00:05,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:00:05,625 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 14:00:05,625 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:00:05,640 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:00:05,640 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:00:09,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13530 backedges. 0 proven. 13530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:00:09,635 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:00:14,231 INFO L134 CoverageAnalysis]: Checked inductivity of 13530 backedges. 0 proven. 13530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:00:14,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:00:14,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 183 [2019-01-08 14:00:14,252 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:00:14,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2019-01-08 14:00:14,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2019-01-08 14:00:14,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13617, Invalid=20423, Unknown=0, NotChecked=0, Total=34040 [2019-01-08 14:00:14,255 INFO L87 Difference]: Start difference. First operand 333 states and 333 transitions. Second operand 168 states. [2019-01-08 14:00:14,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:00:14,987 INFO L93 Difference]: Finished difference Result 339 states and 339 transitions. [2019-01-08 14:00:14,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2019-01-08 14:00:14,987 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 332 [2019-01-08 14:00:14,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:00:14,989 INFO L225 Difference]: With dead ends: 339 [2019-01-08 14:00:14,989 INFO L226 Difference]: Without dead ends: 338 [2019-01-08 14:00:14,991 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 496 SyntacticMatches, 66 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26301 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=13617, Invalid=20423, Unknown=0, NotChecked=0, Total=34040 [2019-01-08 14:00:14,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2019-01-08 14:00:14,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 337. [2019-01-08 14:00:14,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2019-01-08 14:00:14,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 337 transitions. [2019-01-08 14:00:14,996 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 337 transitions. Word has length 332 [2019-01-08 14:00:14,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:00:14,996 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 337 transitions. [2019-01-08 14:00:14,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2019-01-08 14:00:14,996 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 337 transitions. [2019-01-08 14:00:14,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2019-01-08 14:00:14,997 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:00:14,997 INFO L402 BasicCegarLoop]: trace histogram [84, 84, 83, 83, 1, 1] [2019-01-08 14:00:14,997 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:00:14,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:00:14,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1042464609, now seen corresponding path program 83 times [2019-01-08 14:00:14,998 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:00:14,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:00:14,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:00:14,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:00:14,999 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:00:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:00:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13861 backedges. 0 proven. 13861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:00:18,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:00:18,360 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:00:18,361 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:00:18,361 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:00:18,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:00:18,361 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:00:18,372 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:00:18,372 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:00:18,902 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2019-01-08 14:00:18,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:00:18,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:00:18,914 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 14:00:18,915 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:00:18,923 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:00:18,923 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:00:23,197 INFO L134 CoverageAnalysis]: Checked inductivity of 13861 backedges. 0 proven. 13861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:00:23,197 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:00:27,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13861 backedges. 0 proven. 13861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:00:27,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:00:27,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84, 84] total 184 [2019-01-08 14:00:27,810 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:00:27,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 170 states [2019-01-08 14:00:27,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2019-01-08 14:00:27,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13719, Invalid=20691, Unknown=0, NotChecked=0, Total=34410 [2019-01-08 14:00:27,813 INFO L87 Difference]: Start difference. First operand 337 states and 337 transitions. Second operand 170 states. [2019-01-08 14:00:28,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:00:28,604 INFO L93 Difference]: Finished difference Result 343 states and 343 transitions. [2019-01-08 14:00:28,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-01-08 14:00:28,604 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 336 [2019-01-08 14:00:28,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:00:28,606 INFO L225 Difference]: With dead ends: 343 [2019-01-08 14:00:28,606 INFO L226 Difference]: Without dead ends: 342 [2019-01-08 14:00:28,607 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 502 SyntacticMatches, 68 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26798 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=13719, Invalid=20691, Unknown=0, NotChecked=0, Total=34410 [2019-01-08 14:00:28,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2019-01-08 14:00:28,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 341. [2019-01-08 14:00:28,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2019-01-08 14:00:28,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 341 transitions. [2019-01-08 14:00:28,612 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 341 transitions. Word has length 336 [2019-01-08 14:00:28,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:00:28,612 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 341 transitions. [2019-01-08 14:00:28,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 170 states. [2019-01-08 14:00:28,612 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 341 transitions. [2019-01-08 14:00:28,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2019-01-08 14:00:28,614 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:00:28,614 INFO L402 BasicCegarLoop]: trace histogram [85, 85, 84, 84, 1, 1] [2019-01-08 14:00:28,614 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:00:28,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:00:28,614 INFO L82 PathProgramCache]: Analyzing trace with hash -434751718, now seen corresponding path program 84 times [2019-01-08 14:00:28,614 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:00:28,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:00:28,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:00:28,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:00:28,615 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:00:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:00:32,245 INFO L134 CoverageAnalysis]: Checked inductivity of 14196 backedges. 0 proven. 14196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:00:32,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:00:32,246 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:00:32,246 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:00:32,246 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:00:32,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:00:32,246 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:00:32,255 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:00:32,255 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:00:32,362 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:00:32,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:00:32,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:00:32,374 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 14:00:32,374 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:00:32,383 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:00:32,383 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:00:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 14196 backedges. 0 proven. 14196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:00:36,742 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:00:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 14196 backedges. 0 proven. 14196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:00:41,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:00:41,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 185 [2019-01-08 14:00:41,319 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:00:41,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2019-01-08 14:00:41,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2019-01-08 14:00:41,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13821, Invalid=20961, Unknown=0, NotChecked=0, Total=34782 [2019-01-08 14:00:41,322 INFO L87 Difference]: Start difference. First operand 341 states and 341 transitions. Second operand 172 states. [2019-01-08 14:00:42,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:00:42,142 INFO L93 Difference]: Finished difference Result 347 states and 347 transitions. [2019-01-08 14:00:42,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-01-08 14:00:42,142 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 340 [2019-01-08 14:00:42,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:00:42,144 INFO L225 Difference]: With dead ends: 347 [2019-01-08 14:00:42,145 INFO L226 Difference]: Without dead ends: 346 [2019-01-08 14:00:42,146 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 508 SyntacticMatches, 70 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27295 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=13821, Invalid=20961, Unknown=0, NotChecked=0, Total=34782 [2019-01-08 14:00:42,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2019-01-08 14:00:42,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 345. [2019-01-08 14:00:42,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2019-01-08 14:00:42,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 345 transitions. [2019-01-08 14:00:42,152 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 345 transitions. Word has length 340 [2019-01-08 14:00:42,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:00:42,152 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 345 transitions. [2019-01-08 14:00:42,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2019-01-08 14:00:42,152 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 345 transitions. [2019-01-08 14:00:42,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2019-01-08 14:00:42,154 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:00:42,154 INFO L402 BasicCegarLoop]: trace histogram [86, 86, 85, 85, 1, 1] [2019-01-08 14:00:42,154 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:00:42,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:00:42,154 INFO L82 PathProgramCache]: Analyzing trace with hash -207279533, now seen corresponding path program 85 times [2019-01-08 14:00:42,155 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:00:42,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:00:42,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:00:42,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:00:42,155 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:00:42,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:00:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 14535 backedges. 0 proven. 14535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:00:45,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:00:45,662 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:00:45,662 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:00:45,662 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:00:45,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:00:45,663 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:00:45,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:00:45,674 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:00:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:00:45,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:00:45,787 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 14:00:45,787 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:00:45,801 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:00:45,801 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:00:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 14535 backedges. 0 proven. 14535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:00:50,008 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:00:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 14535 backedges. 0 proven. 14535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:00:54,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:00:54,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86, 86] total 186 [2019-01-08 14:00:54,498 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:00:54,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 174 states [2019-01-08 14:00:54,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2019-01-08 14:00:54,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13923, Invalid=21233, Unknown=0, NotChecked=0, Total=35156 [2019-01-08 14:00:54,502 INFO L87 Difference]: Start difference. First operand 345 states and 345 transitions. Second operand 174 states. [2019-01-08 14:00:55,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:00:55,289 INFO L93 Difference]: Finished difference Result 351 states and 351 transitions. [2019-01-08 14:00:55,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-01-08 14:00:55,289 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 344 [2019-01-08 14:00:55,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:00:55,291 INFO L225 Difference]: With dead ends: 351 [2019-01-08 14:00:55,292 INFO L226 Difference]: Without dead ends: 350 [2019-01-08 14:00:55,293 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 514 SyntacticMatches, 72 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27792 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=13923, Invalid=21233, Unknown=0, NotChecked=0, Total=35156 [2019-01-08 14:00:55,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2019-01-08 14:00:55,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 349. [2019-01-08 14:00:55,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2019-01-08 14:00:55,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 349 transitions. [2019-01-08 14:00:55,298 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 349 transitions. Word has length 344 [2019-01-08 14:00:55,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:00:55,298 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 349 transitions. [2019-01-08 14:00:55,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 174 states. [2019-01-08 14:00:55,298 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 349 transitions. [2019-01-08 14:00:55,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2019-01-08 14:00:55,300 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:00:55,300 INFO L402 BasicCegarLoop]: trace histogram [87, 87, 86, 86, 1, 1] [2019-01-08 14:00:55,300 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:00:55,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:00:55,300 INFO L82 PathProgramCache]: Analyzing trace with hash -307898100, now seen corresponding path program 86 times [2019-01-08 14:00:55,300 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:00:55,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:00:55,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:00:55,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:00:55,301 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:00:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:00:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 14878 backedges. 0 proven. 14878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:00:59,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:00:59,160 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:00:59,161 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:00:59,161 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:00:59,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:00:59,161 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:00:59,170 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:00:59,170 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:00:59,719 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 87 check-sat command(s) [2019-01-08 14:00:59,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:00:59,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:00:59,733 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 14:00:59,733 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:00:59,744 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:00:59,744 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:01:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 14878 backedges. 0 proven. 14878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:01:04,302 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:01:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 14878 backedges. 0 proven. 14878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:01:08,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:01:08,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87, 87] total 187 [2019-01-08 14:01:08,939 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:01:08,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 176 states [2019-01-08 14:01:08,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2019-01-08 14:01:08,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14025, Invalid=21507, Unknown=0, NotChecked=0, Total=35532 [2019-01-08 14:01:08,942 INFO L87 Difference]: Start difference. First operand 349 states and 349 transitions. Second operand 176 states. [2019-01-08 14:01:09,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:01:09,687 INFO L93 Difference]: Finished difference Result 355 states and 355 transitions. [2019-01-08 14:01:09,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-01-08 14:01:09,687 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 348 [2019-01-08 14:01:09,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:01:09,689 INFO L225 Difference]: With dead ends: 355 [2019-01-08 14:01:09,689 INFO L226 Difference]: Without dead ends: 354 [2019-01-08 14:01:09,690 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 520 SyntacticMatches, 74 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28289 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=14025, Invalid=21507, Unknown=0, NotChecked=0, Total=35532 [2019-01-08 14:01:09,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2019-01-08 14:01:09,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 353. [2019-01-08 14:01:09,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2019-01-08 14:01:09,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 353 transitions. [2019-01-08 14:01:09,695 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 353 transitions. Word has length 348 [2019-01-08 14:01:09,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:01:09,696 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 353 transitions. [2019-01-08 14:01:09,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 176 states. [2019-01-08 14:01:09,696 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 353 transitions. [2019-01-08 14:01:09,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2019-01-08 14:01:09,697 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:01:09,697 INFO L402 BasicCegarLoop]: trace histogram [88, 88, 87, 87, 1, 1] [2019-01-08 14:01:09,697 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:01:09,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:01:09,698 INFO L82 PathProgramCache]: Analyzing trace with hash -2050063547, now seen corresponding path program 87 times [2019-01-08 14:01:09,698 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:01:09,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:01:09,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:01:09,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:01:09,698 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:01:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:01:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 15225 backedges. 0 proven. 15225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:01:13,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:01:13,547 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:01:13,547 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:01:13,547 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:01:13,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:01:13,547 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:01:13,556 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:01:13,556 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:01:13,671 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:01:13,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:01:13,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:01:13,683 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 14:01:13,683 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:01:13,695 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:13,695 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:01:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 15225 backedges. 0 proven. 15225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:01:18,269 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:01:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 15225 backedges. 0 proven. 15225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:01:22,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:01:22,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88, 88] total 188 [2019-01-08 14:01:22,862 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:01:22,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 178 states [2019-01-08 14:01:22,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2019-01-08 14:01:22,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14127, Invalid=21783, Unknown=0, NotChecked=0, Total=35910 [2019-01-08 14:01:22,865 INFO L87 Difference]: Start difference. First operand 353 states and 353 transitions. Second operand 178 states. [2019-01-08 14:01:23,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:01:23,583 INFO L93 Difference]: Finished difference Result 359 states and 359 transitions. [2019-01-08 14:01:23,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2019-01-08 14:01:23,584 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 352 [2019-01-08 14:01:23,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:01:23,586 INFO L225 Difference]: With dead ends: 359 [2019-01-08 14:01:23,586 INFO L226 Difference]: Without dead ends: 358 [2019-01-08 14:01:23,587 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 790 GetRequests, 526 SyntacticMatches, 76 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28786 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=14127, Invalid=21783, Unknown=0, NotChecked=0, Total=35910 [2019-01-08 14:01:23,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2019-01-08 14:01:23,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 357. [2019-01-08 14:01:23,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2019-01-08 14:01:23,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 357 transitions. [2019-01-08 14:01:23,592 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 357 transitions. Word has length 352 [2019-01-08 14:01:23,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:01:23,592 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 357 transitions. [2019-01-08 14:01:23,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 178 states. [2019-01-08 14:01:23,592 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 357 transitions. [2019-01-08 14:01:23,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2019-01-08 14:01:23,593 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:01:23,593 INFO L402 BasicCegarLoop]: trace histogram [89, 89, 88, 88, 1, 1] [2019-01-08 14:01:23,593 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:01:23,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:01:23,594 INFO L82 PathProgramCache]: Analyzing trace with hash 682977534, now seen corresponding path program 88 times [2019-01-08 14:01:23,594 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:01:23,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:01:23,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:01:23,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:01:23,595 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:01:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:01:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 15576 backedges. 0 proven. 15576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:01:27,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:01:27,515 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:01:27,515 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:01:27,515 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:01:27,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:01:27,516 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:01:27,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:01:27,524 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:01:27,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:01:27,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:01:27,632 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 14:01:27,632 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:01:27,643 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:27,644 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:01:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 15576 backedges. 0 proven. 15576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:01:32,440 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:01:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 15576 backedges. 0 proven. 15576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:01:36,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:01:36,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 189 [2019-01-08 14:01:36,855 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:01:36,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 180 states [2019-01-08 14:01:36,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2019-01-08 14:01:36,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14229, Invalid=22061, Unknown=0, NotChecked=0, Total=36290 [2019-01-08 14:01:36,858 INFO L87 Difference]: Start difference. First operand 357 states and 357 transitions. Second operand 180 states. [2019-01-08 14:01:37,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:01:37,742 INFO L93 Difference]: Finished difference Result 363 states and 363 transitions. [2019-01-08 14:01:37,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-01-08 14:01:37,743 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 356 [2019-01-08 14:01:37,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:01:37,744 INFO L225 Difference]: With dead ends: 363 [2019-01-08 14:01:37,744 INFO L226 Difference]: Without dead ends: 362 [2019-01-08 14:01:37,745 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 799 GetRequests, 532 SyntacticMatches, 78 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29283 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=14229, Invalid=22061, Unknown=0, NotChecked=0, Total=36290 [2019-01-08 14:01:37,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2019-01-08 14:01:37,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 361. [2019-01-08 14:01:37,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2019-01-08 14:01:37,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 361 transitions. [2019-01-08 14:01:37,750 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 361 transitions. Word has length 356 [2019-01-08 14:01:37,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:01:37,751 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 361 transitions. [2019-01-08 14:01:37,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 180 states. [2019-01-08 14:01:37,751 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 361 transitions. [2019-01-08 14:01:37,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2019-01-08 14:01:37,752 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:01:37,752 INFO L402 BasicCegarLoop]: trace histogram [90, 90, 89, 89, 1, 1] [2019-01-08 14:01:37,752 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:01:37,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:01:37,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1915696585, now seen corresponding path program 89 times [2019-01-08 14:01:37,753 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:01:37,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:01:37,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:01:37,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:01:37,753 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:01:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:01:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15931 backedges. 0 proven. 15931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:01:41,574 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:01:41,574 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:01:41,574 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:01:41,574 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:01:41,574 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:01:41,574 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:01:41,582 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:01:41,582 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:01:42,196 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 90 check-sat command(s) [2019-01-08 14:01:42,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:01:42,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:01:42,218 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 14:01:42,218 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:01:42,229 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:42,229 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:01:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 15931 backedges. 0 proven. 15931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:01:46,819 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:01:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 15931 backedges. 0 proven. 15931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:01:51,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:01:51,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90, 90] total 190 [2019-01-08 14:01:51,376 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:01:51,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 182 states [2019-01-08 14:01:51,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2019-01-08 14:01:51,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14331, Invalid=22341, Unknown=0, NotChecked=0, Total=36672 [2019-01-08 14:01:51,379 INFO L87 Difference]: Start difference. First operand 361 states and 361 transitions. Second operand 182 states. [2019-01-08 14:01:52,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:01:52,214 INFO L93 Difference]: Finished difference Result 367 states and 367 transitions. [2019-01-08 14:01:52,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-01-08 14:01:52,214 INFO L78 Accepts]: Start accepts. Automaton has 182 states. Word has length 360 [2019-01-08 14:01:52,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:01:52,216 INFO L225 Difference]: With dead ends: 367 [2019-01-08 14:01:52,216 INFO L226 Difference]: Without dead ends: 366 [2019-01-08 14:01:52,217 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 538 SyntacticMatches, 80 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29780 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=14331, Invalid=22341, Unknown=0, NotChecked=0, Total=36672 [2019-01-08 14:01:52,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2019-01-08 14:01:52,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 365. [2019-01-08 14:01:52,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2019-01-08 14:01:52,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 365 transitions. [2019-01-08 14:01:52,223 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 365 transitions. Word has length 360 [2019-01-08 14:01:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:01:52,223 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 365 transitions. [2019-01-08 14:01:52,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 182 states. [2019-01-08 14:01:52,223 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 365 transitions. [2019-01-08 14:01:52,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2019-01-08 14:01:52,224 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:01:52,224 INFO L402 BasicCegarLoop]: trace histogram [91, 91, 90, 90, 1, 1] [2019-01-08 14:01:52,225 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:01:52,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:01:52,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1198974704, now seen corresponding path program 90 times [2019-01-08 14:01:52,225 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:01:52,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:01:52,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:01:52,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:01:52,226 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:01:52,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:01:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16290 backedges. 0 proven. 16290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:01:56,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:01:56,103 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:01:56,104 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:01:56,104 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:01:56,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:01:56,104 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:01:56,112 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:01:56,112 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:01:56,232 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:01:56,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:01:56,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:01:56,254 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 14:01:56,254 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:01:56,263 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:56,263 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:02:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16290 backedges. 0 proven. 16290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:02:01,216 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:02:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16290 backedges. 0 proven. 16290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:02:05,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:02:05,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91, 91] total 191 [2019-01-08 14:02:05,885 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:02:05,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 184 states [2019-01-08 14:02:05,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2019-01-08 14:02:05,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14433, Invalid=22623, Unknown=0, NotChecked=0, Total=37056 [2019-01-08 14:02:05,888 INFO L87 Difference]: Start difference. First operand 365 states and 365 transitions. Second operand 184 states. [2019-01-08 14:02:06,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:02:06,634 INFO L93 Difference]: Finished difference Result 371 states and 371 transitions. [2019-01-08 14:02:06,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-01-08 14:02:06,635 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 364 [2019-01-08 14:02:06,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:02:06,636 INFO L225 Difference]: With dead ends: 371 [2019-01-08 14:02:06,636 INFO L226 Difference]: Without dead ends: 370 [2019-01-08 14:02:06,637 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 544 SyntacticMatches, 82 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30277 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=14433, Invalid=22623, Unknown=0, NotChecked=0, Total=37056 [2019-01-08 14:02:06,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2019-01-08 14:02:06,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 369. [2019-01-08 14:02:06,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2019-01-08 14:02:06,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 369 transitions. [2019-01-08 14:02:06,642 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 369 transitions. Word has length 364 [2019-01-08 14:02:06,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:02:06,642 INFO L480 AbstractCegarLoop]: Abstraction has 369 states and 369 transitions. [2019-01-08 14:02:06,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 184 states. [2019-01-08 14:02:06,642 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 369 transitions. [2019-01-08 14:02:06,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2019-01-08 14:02:06,644 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:02:06,644 INFO L402 BasicCegarLoop]: trace histogram [92, 92, 91, 91, 1, 1] [2019-01-08 14:02:06,644 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:02:06,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:02:06,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1390280489, now seen corresponding path program 91 times [2019-01-08 14:02:06,645 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:02:06,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:02:06,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:02:06,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:02:06,646 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:02:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:02:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16653 backedges. 0 proven. 16653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:02:11,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:02:11,053 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:02:11,053 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:02:11,053 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:02:11,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:02:11,053 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:02:11,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:02:11,062 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:02:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:02:11,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:02:11,178 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 14:02:11,178 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:02:11,192 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:02:11,192 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:02:16,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16653 backedges. 0 proven. 16653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:02:16,112 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:02:20,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16653 backedges. 0 proven. 16653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:02:20,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:02:20,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92, 92] total 192 [2019-01-08 14:02:20,695 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:02:20,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 186 states [2019-01-08 14:02:20,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2019-01-08 14:02:20,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14535, Invalid=22907, Unknown=0, NotChecked=0, Total=37442 [2019-01-08 14:02:20,698 INFO L87 Difference]: Start difference. First operand 369 states and 369 transitions. Second operand 186 states. [2019-01-08 14:02:21,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:02:21,440 INFO L93 Difference]: Finished difference Result 375 states and 375 transitions. [2019-01-08 14:02:21,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-01-08 14:02:21,441 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 368 [2019-01-08 14:02:21,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:02:21,443 INFO L225 Difference]: With dead ends: 375 [2019-01-08 14:02:21,443 INFO L226 Difference]: Without dead ends: 374 [2019-01-08 14:02:21,444 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 826 GetRequests, 550 SyntacticMatches, 84 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30774 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=14535, Invalid=22907, Unknown=0, NotChecked=0, Total=37442 [2019-01-08 14:02:21,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2019-01-08 14:02:21,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 373. [2019-01-08 14:02:21,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2019-01-08 14:02:21,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 373 transitions. [2019-01-08 14:02:21,449 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 373 transitions. Word has length 368 [2019-01-08 14:02:21,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:02:21,449 INFO L480 AbstractCegarLoop]: Abstraction has 373 states and 373 transitions. [2019-01-08 14:02:21,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 186 states. [2019-01-08 14:02:21,449 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 373 transitions. [2019-01-08 14:02:21,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2019-01-08 14:02:21,450 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:02:21,450 INFO L402 BasicCegarLoop]: trace histogram [93, 93, 92, 92, 1, 1] [2019-01-08 14:02:21,450 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:02:21,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:02:21,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1474538782, now seen corresponding path program 92 times [2019-01-08 14:02:21,451 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:02:21,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:02:21,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:02:21,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:02:21,452 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:02:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:02:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 17020 backedges. 0 proven. 17020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:02:25,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:02:25,819 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:02:25,819 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:02:25,819 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:02:25,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:02:25,819 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:02:25,828 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:02:25,828 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:02:26,468 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 93 check-sat command(s) [2019-01-08 14:02:26,468 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:02:26,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:02:26,485 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 14:02:26,485 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:02:26,493 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:02:26,493 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:02:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 17020 backedges. 0 proven. 17020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:02:31,578 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:02:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 17020 backedges. 0 proven. 17020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:02:36,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:02:36,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93, 93] total 193 [2019-01-08 14:02:36,252 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:02:36,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 188 states [2019-01-08 14:02:36,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2019-01-08 14:02:36,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14637, Invalid=23193, Unknown=0, NotChecked=0, Total=37830 [2019-01-08 14:02:36,255 INFO L87 Difference]: Start difference. First operand 373 states and 373 transitions. Second operand 188 states. [2019-01-08 14:02:37,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:02:37,006 INFO L93 Difference]: Finished difference Result 379 states and 379 transitions. [2019-01-08 14:02:37,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-01-08 14:02:37,006 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 372 [2019-01-08 14:02:37,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:02:37,008 INFO L225 Difference]: With dead ends: 379 [2019-01-08 14:02:37,008 INFO L226 Difference]: Without dead ends: 378 [2019-01-08 14:02:37,009 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 835 GetRequests, 556 SyntacticMatches, 86 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31271 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=14637, Invalid=23193, Unknown=0, NotChecked=0, Total=37830 [2019-01-08 14:02:37,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2019-01-08 14:02:37,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 377. [2019-01-08 14:02:37,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2019-01-08 14:02:37,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 377 transitions. [2019-01-08 14:02:37,014 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 377 transitions. Word has length 372 [2019-01-08 14:02:37,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:02:37,014 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 377 transitions. [2019-01-08 14:02:37,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 188 states. [2019-01-08 14:02:37,014 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 377 transitions. [2019-01-08 14:02:37,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2019-01-08 14:02:37,016 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:02:37,016 INFO L402 BasicCegarLoop]: trace histogram [94, 94, 93, 93, 1, 1] [2019-01-08 14:02:37,016 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:02:37,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:02:37,016 INFO L82 PathProgramCache]: Analyzing trace with hash -903339493, now seen corresponding path program 93 times [2019-01-08 14:02:37,016 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:02:37,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:02:37,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:02:37,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:02:37,017 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:02:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:02:41,476 INFO L134 CoverageAnalysis]: Checked inductivity of 17391 backedges. 0 proven. 17391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:02:41,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:02:41,477 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:02:41,477 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:02:41,477 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:02:41,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:02:41,477 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:02:41,485 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:02:41,485 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:02:41,605 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:02:41,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:02:41,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:02:41,618 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 14:02:41,618 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:02:41,627 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:02:41,627 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:02:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17391 backedges. 0 proven. 17391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:02:46,775 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:02:51,397 INFO L134 CoverageAnalysis]: Checked inductivity of 17391 backedges. 0 proven. 17391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:02:51,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:02:51,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94, 94] total 194 [2019-01-08 14:02:51,417 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:02:51,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 190 states [2019-01-08 14:02:51,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2019-01-08 14:02:51,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14739, Invalid=23481, Unknown=0, NotChecked=0, Total=38220 [2019-01-08 14:02:51,419 INFO L87 Difference]: Start difference. First operand 377 states and 377 transitions. Second operand 190 states. [2019-01-08 14:02:52,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:02:52,148 INFO L93 Difference]: Finished difference Result 383 states and 383 transitions. [2019-01-08 14:02:52,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-01-08 14:02:52,148 INFO L78 Accepts]: Start accepts. Automaton has 190 states. Word has length 376 [2019-01-08 14:02:52,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:02:52,151 INFO L225 Difference]: With dead ends: 383 [2019-01-08 14:02:52,151 INFO L226 Difference]: Without dead ends: 382 [2019-01-08 14:02:52,152 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 844 GetRequests, 562 SyntacticMatches, 88 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31768 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=14739, Invalid=23481, Unknown=0, NotChecked=0, Total=38220 [2019-01-08 14:02:52,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2019-01-08 14:02:52,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 381. [2019-01-08 14:02:52,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2019-01-08 14:02:52,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 381 transitions. [2019-01-08 14:02:52,158 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 381 transitions. Word has length 376 [2019-01-08 14:02:52,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:02:52,158 INFO L480 AbstractCegarLoop]: Abstraction has 381 states and 381 transitions. [2019-01-08 14:02:52,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 190 states. [2019-01-08 14:02:52,158 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 381 transitions. [2019-01-08 14:02:52,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2019-01-08 14:02:52,159 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:02:52,160 INFO L402 BasicCegarLoop]: trace histogram [95, 95, 94, 94, 1, 1] [2019-01-08 14:02:52,160 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:02:52,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:02:52,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1456975060, now seen corresponding path program 94 times [2019-01-08 14:02:52,160 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:02:52,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:02:52,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:02:52,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:02:52,161 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:02:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:02:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 17766 backedges. 0 proven. 17766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:02:56,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:02:56,693 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:02:56,693 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:02:56,693 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:02:56,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:02:56,693 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:02:56,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:02:56,701 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:02:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:02:56,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:02:56,816 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 14:02:56,816 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:02:56,846 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:02:56,846 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:03:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 17766 backedges. 0 proven. 17766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:03:02,181 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:03:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 17766 backedges. 0 proven. 17766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:03:06,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:03:06,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 195 [2019-01-08 14:03:06,861 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:03:06,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2019-01-08 14:03:06,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2019-01-08 14:03:06,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14841, Invalid=23771, Unknown=0, NotChecked=0, Total=38612 [2019-01-08 14:03:06,864 INFO L87 Difference]: Start difference. First operand 381 states and 381 transitions. Second operand 192 states. [2019-01-08 14:03:07,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:03:07,672 INFO L93 Difference]: Finished difference Result 387 states and 387 transitions. [2019-01-08 14:03:07,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-01-08 14:03:07,672 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 380 [2019-01-08 14:03:07,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:03:07,675 INFO L225 Difference]: With dead ends: 387 [2019-01-08 14:03:07,675 INFO L226 Difference]: Without dead ends: 386 [2019-01-08 14:03:07,676 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 853 GetRequests, 568 SyntacticMatches, 90 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32265 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=14841, Invalid=23771, Unknown=0, NotChecked=0, Total=38612 [2019-01-08 14:03:07,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2019-01-08 14:03:07,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 385. [2019-01-08 14:03:07,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2019-01-08 14:03:07,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 385 transitions. [2019-01-08 14:03:07,682 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 385 transitions. Word has length 380 [2019-01-08 14:03:07,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:03:07,682 INFO L480 AbstractCegarLoop]: Abstraction has 385 states and 385 transitions. [2019-01-08 14:03:07,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 192 states. [2019-01-08 14:03:07,682 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 385 transitions. [2019-01-08 14:03:07,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2019-01-08 14:03:07,683 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:03:07,684 INFO L402 BasicCegarLoop]: trace histogram [96, 96, 95, 95, 1, 1] [2019-01-08 14:03:07,684 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:03:07,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:03:07,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1763626227, now seen corresponding path program 95 times [2019-01-08 14:03:07,684 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:03:07,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:03:07,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:03:07,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:03:07,685 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:03:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:03:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:03:12,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:03:12,243 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:03:12,243 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:03:12,244 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:03:12,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:03:12,244 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:03:12,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:03:12,253 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:03:12,958 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 96 check-sat command(s) [2019-01-08 14:03:12,959 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:03:12,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:03:12,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 14:03:12,978 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:03:12,989 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:03:12,989 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:03:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:03:18,562 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:03:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:03:23,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:03:23,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 196 [2019-01-08 14:03:23,446 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:03:23,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 194 states [2019-01-08 14:03:23,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2019-01-08 14:03:23,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14943, Invalid=24063, Unknown=0, NotChecked=0, Total=39006 [2019-01-08 14:03:23,449 INFO L87 Difference]: Start difference. First operand 385 states and 385 transitions. Second operand 194 states. [2019-01-08 14:03:24,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:03:24,350 INFO L93 Difference]: Finished difference Result 391 states and 391 transitions. [2019-01-08 14:03:24,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-01-08 14:03:24,350 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 384 [2019-01-08 14:03:24,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:03:24,353 INFO L225 Difference]: With dead ends: 391 [2019-01-08 14:03:24,353 INFO L226 Difference]: Without dead ends: 390 [2019-01-08 14:03:24,354 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 574 SyntacticMatches, 92 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32762 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=14943, Invalid=24063, Unknown=0, NotChecked=0, Total=39006 [2019-01-08 14:03:24,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2019-01-08 14:03:24,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 389. [2019-01-08 14:03:24,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2019-01-08 14:03:24,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 389 transitions. [2019-01-08 14:03:24,360 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 389 transitions. Word has length 384 [2019-01-08 14:03:24,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:03:24,360 INFO L480 AbstractCegarLoop]: Abstraction has 389 states and 389 transitions. [2019-01-08 14:03:24,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 194 states. [2019-01-08 14:03:24,360 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 389 transitions. [2019-01-08 14:03:24,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2019-01-08 14:03:24,362 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:03:24,362 INFO L402 BasicCegarLoop]: trace histogram [97, 97, 96, 96, 1, 1] [2019-01-08 14:03:24,363 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:03:24,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:03:24,363 INFO L82 PathProgramCache]: Analyzing trace with hash 232453318, now seen corresponding path program 96 times [2019-01-08 14:03:24,363 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:03:24,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:03:24,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:03:24,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:03:24,364 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:03:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:03:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 18528 backedges. 0 proven. 18528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:03:28,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:03:28,777 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:03:28,777 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:03:28,777 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:03:28,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:03:28,777 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:03:28,787 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:03:28,787 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:03:28,919 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:03:28,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:03:28,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:03:28,932 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 14:03:28,933 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:03:28,944 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:03:28,944 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:03:34,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18528 backedges. 0 proven. 18528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:03:34,805 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:03:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18528 backedges. 0 proven. 18528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:03:39,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:03:39,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 197 [2019-01-08 14:03:39,303 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:03:39,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 196 states [2019-01-08 14:03:39,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2019-01-08 14:03:39,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15045, Invalid=24357, Unknown=0, NotChecked=0, Total=39402 [2019-01-08 14:03:39,306 INFO L87 Difference]: Start difference. First operand 389 states and 389 transitions. Second operand 196 states. [2019-01-08 14:03:40,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:03:40,243 INFO L93 Difference]: Finished difference Result 395 states and 395 transitions. [2019-01-08 14:03:40,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-01-08 14:03:40,243 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 388 [2019-01-08 14:03:40,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:03:40,245 INFO L225 Difference]: With dead ends: 395 [2019-01-08 14:03:40,245 INFO L226 Difference]: Without dead ends: 394 [2019-01-08 14:03:40,246 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 871 GetRequests, 580 SyntacticMatches, 94 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33259 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=15045, Invalid=24357, Unknown=0, NotChecked=0, Total=39402 [2019-01-08 14:03:40,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2019-01-08 14:03:40,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 393. [2019-01-08 14:03:40,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2019-01-08 14:03:40,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 393 transitions. [2019-01-08 14:03:40,252 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 393 transitions. Word has length 388 [2019-01-08 14:03:40,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:03:40,252 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 393 transitions. [2019-01-08 14:03:40,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 196 states. [2019-01-08 14:03:40,252 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 393 transitions. [2019-01-08 14:03:40,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2019-01-08 14:03:40,253 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:03:40,254 INFO L402 BasicCegarLoop]: trace histogram [98, 98, 97, 97, 1, 1] [2019-01-08 14:03:40,254 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:03:40,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:03:40,254 INFO L82 PathProgramCache]: Analyzing trace with hash 171651583, now seen corresponding path program 97 times [2019-01-08 14:03:40,254 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:03:40,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:03:40,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:03:40,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:03:40,255 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:03:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:03:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18915 backedges. 0 proven. 18915 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:03:44,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:03:44,816 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:03:44,817 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:03:44,817 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:03:44,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:03:44,817 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:03:44,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:03:44,825 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:03:44,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:03:44,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:03:44,946 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 14:03:44,947 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:03:44,954 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:03:44,954 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:03:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18915 backedges. 0 proven. 18915 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:03:50,706 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:03:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18915 backedges. 0 proven. 18915 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:03:55,446 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:03:55,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 198 [2019-01-08 14:03:55,446 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:03:55,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 198 states [2019-01-08 14:03:55,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2019-01-08 14:03:55,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15147, Invalid=24653, Unknown=0, NotChecked=0, Total=39800 [2019-01-08 14:03:55,450 INFO L87 Difference]: Start difference. First operand 393 states and 393 transitions. Second operand 198 states. [2019-01-08 14:03:56,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:03:56,221 INFO L93 Difference]: Finished difference Result 399 states and 399 transitions. [2019-01-08 14:03:56,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-01-08 14:03:56,222 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 392 [2019-01-08 14:03:56,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:03:56,224 INFO L225 Difference]: With dead ends: 399 [2019-01-08 14:03:56,224 INFO L226 Difference]: Without dead ends: 398 [2019-01-08 14:03:56,225 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 586 SyntacticMatches, 96 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33756 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=15147, Invalid=24653, Unknown=0, NotChecked=0, Total=39800 [2019-01-08 14:03:56,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2019-01-08 14:03:56,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 397. [2019-01-08 14:03:56,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2019-01-08 14:03:56,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 397 transitions. [2019-01-08 14:03:56,231 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 397 transitions. Word has length 392 [2019-01-08 14:03:56,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:03:56,231 INFO L480 AbstractCegarLoop]: Abstraction has 397 states and 397 transitions. [2019-01-08 14:03:56,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 198 states. [2019-01-08 14:03:56,231 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 397 transitions. [2019-01-08 14:03:56,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2019-01-08 14:03:56,233 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:03:56,233 INFO L402 BasicCegarLoop]: trace histogram [99, 99, 98, 98, 1, 1] [2019-01-08 14:03:56,233 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:03:56,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:03:56,233 INFO L82 PathProgramCache]: Analyzing trace with hash 894970552, now seen corresponding path program 98 times [2019-01-08 14:03:56,233 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:03:56,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:03:56,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:03:56,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:03:56,234 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:03:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 19306 backedges. 0 proven. 19306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:00,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:00,904 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:04:00,904 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:04:00,904 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:04:00,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:00,904 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:04:00,913 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:04:00,913 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:04:01,650 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 99 check-sat command(s) [2019-01-08 14:04:01,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:04:01,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:04:01,664 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 14:04:01,664 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:01,685 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:01,686 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:04:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 19306 backedges. 0 proven. 19306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:07,476 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:04:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 19306 backedges. 0 proven. 19306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:12,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:04:12,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 199 [2019-01-08 14:04:12,119 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:04:12,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 200 states [2019-01-08 14:04:12,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2019-01-08 14:04:12,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15249, Invalid=24951, Unknown=0, NotChecked=0, Total=40200 [2019-01-08 14:04:12,122 INFO L87 Difference]: Start difference. First operand 397 states and 397 transitions. Second operand 200 states. [2019-01-08 14:04:12,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:04:12,955 INFO L93 Difference]: Finished difference Result 403 states and 403 transitions. [2019-01-08 14:04:12,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-01-08 14:04:12,955 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 396 [2019-01-08 14:04:12,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:04:12,957 INFO L225 Difference]: With dead ends: 403 [2019-01-08 14:04:12,957 INFO L226 Difference]: Without dead ends: 402 [2019-01-08 14:04:12,958 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 889 GetRequests, 592 SyntacticMatches, 98 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34253 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=15249, Invalid=24951, Unknown=0, NotChecked=0, Total=40200 [2019-01-08 14:04:12,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2019-01-08 14:04:12,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 401. [2019-01-08 14:04:12,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2019-01-08 14:04:12,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 401 transitions. [2019-01-08 14:04:12,966 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 401 transitions. Word has length 396 [2019-01-08 14:04:12,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:04:12,966 INFO L480 AbstractCegarLoop]: Abstraction has 401 states and 401 transitions. [2019-01-08 14:04:12,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 200 states. [2019-01-08 14:04:12,966 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 401 transitions. [2019-01-08 14:04:12,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2019-01-08 14:04:12,968 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:04:12,968 INFO L402 BasicCegarLoop]: trace histogram [100, 100, 99, 99, 1, 1] [2019-01-08 14:04:12,969 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:04:12,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:12,969 INFO L82 PathProgramCache]: Analyzing trace with hash 594026225, now seen corresponding path program 99 times [2019-01-08 14:04:12,969 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:04:12,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:12,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:04:12,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:12,970 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:04:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 19701 backedges. 0 proven. 19701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:18,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:18,021 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:04:18,021 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:04:18,021 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:04:18,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:18,022 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:04:18,031 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:04:18,031 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:04:18,177 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:04:18,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:04:18,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:04:18,209 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-08 14:04:18,209 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:18,228 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:18,228 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:04:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 19701 backedges. 0 proven. 19701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:24,123 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:04:28,688 INFO L134 CoverageAnalysis]: Checked inductivity of 19701 backedges. 0 proven. 19701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:28,707 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:04:28,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100, 100] total 200 [2019-01-08 14:04:28,708 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:04:28,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 202 states [2019-01-08 14:04:28,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2019-01-08 14:04:28,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15351, Invalid=25251, Unknown=0, NotChecked=0, Total=40602 [2019-01-08 14:04:28,711 INFO L87 Difference]: Start difference. First operand 401 states and 401 transitions. Second operand 202 states. [2019-01-08 14:04:29,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:04:29,614 INFO L93 Difference]: Finished difference Result 407 states and 407 transitions. [2019-01-08 14:04:29,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2019-01-08 14:04:29,614 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 400 [2019-01-08 14:04:29,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:04:29,616 INFO L225 Difference]: With dead ends: 407 [2019-01-08 14:04:29,617 INFO L226 Difference]: Without dead ends: 406 [2019-01-08 14:04:29,618 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 898 GetRequests, 599 SyntacticMatches, 99 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34551 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=15351, Invalid=25251, Unknown=0, NotChecked=0, Total=40602 [2019-01-08 14:04:29,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2019-01-08 14:04:29,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 405. [2019-01-08 14:04:29,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2019-01-08 14:04:29,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 405 transitions. [2019-01-08 14:04:29,624 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 405 transitions. Word has length 400 [2019-01-08 14:04:29,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:04:29,624 INFO L480 AbstractCegarLoop]: Abstraction has 405 states and 405 transitions. [2019-01-08 14:04:29,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 202 states. [2019-01-08 14:04:29,625 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 405 transitions. [2019-01-08 14:04:29,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2019-01-08 14:04:29,626 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:04:29,627 INFO L402 BasicCegarLoop]: trace histogram [101, 101, 100, 100, 1, 1] [2019-01-08 14:04:29,627 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:04:29,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:29,627 INFO L82 PathProgramCache]: Analyzing trace with hash -478064982, now seen corresponding path program 100 times [2019-01-08 14:04:29,628 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:04:29,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:29,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:04:29,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:29,629 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:04:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 20100 backedges. 19603 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:34,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:34,619 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:04:34,619 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:04:34,619 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:04:34,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:34,619 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:04:34,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:34,627 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:04:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:34,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:04:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 20100 backedges. 20000 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:34,922 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:04:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 20100 backedges. 20000 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:40,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:04:40,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103, 103] total 104 [2019-01-08 14:04:40,361 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:04:40,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2019-01-08 14:04:40,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2019-01-08 14:04:40,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5258, Invalid=5662, Unknown=0, NotChecked=0, Total=10920 [2019-01-08 14:04:40,363 INFO L87 Difference]: Start difference. First operand 405 states and 405 transitions. Second operand 105 states. [2019-01-08 14:04:41,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:04:41,917 INFO L93 Difference]: Finished difference Result 408 states and 408 transitions. [2019-01-08 14:04:41,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2019-01-08 14:04:41,917 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 404 [2019-01-08 14:04:41,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:04:41,918 INFO L225 Difference]: With dead ends: 408 [2019-01-08 14:04:41,918 INFO L226 Difference]: Without dead ends: 0 [2019-01-08 14:04:41,921 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 910 GetRequests, 706 SyntacticMatches, 100 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5643 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=5362, Invalid=5768, Unknown=0, NotChecked=0, Total=11130 [2019-01-08 14:04:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-01-08 14:04:41,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-01-08 14:04:41,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-01-08 14:04:41,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-01-08 14:04:41,922 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 404 [2019-01-08 14:04:41,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:04:41,922 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-01-08 14:04:41,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2019-01-08 14:04:41,922 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-01-08 14:04:41,922 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-08 14:04:41,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-01-08 14:04:42,057 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 511 [2019-01-08 14:04:44,856 WARN L181 SmtUtils]: Spent 2.79 s on a formula simplification. DAG size of input: 511 DAG size of output: 509 [2019-01-08 14:04:44,863 INFO L448 ceAbstractionStarter]: For program point mainENTRY(lines 3 24) no Hoare annotation was computed. [2019-01-08 14:04:44,863 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONASSERT(line 17) no Hoare annotation was computed. [2019-01-08 14:04:44,863 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 3 24) no Hoare annotation was computed. [2019-01-08 14:04:44,863 INFO L448 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2019-01-08 14:04:44,863 INFO L448 ceAbstractionStarter]: For program point L16(lines 16 20) no Hoare annotation was computed. [2019-01-08 14:04:44,864 INFO L448 ceAbstractionStarter]: For program point L16-1(lines 16 20) no Hoare annotation was computed. [2019-01-08 14:04:44,866 INFO L444 ceAbstractionStarter]: At program point L13-1(lines 13 22) the Hoare annotation is: (let ((.cse0 (<= 400 (select |#length| main_q.base)))) (or (and (<= main_q.offset 112) (<= (+ main_p.offset 112) main_q.offset) .cse0) (and (<= main_q.offset 260) (<= (+ main_p.offset 260) main_q.offset) .cse0) (and (<= (+ main_p.offset 128) main_q.offset) (<= main_q.offset 128) .cse0) (and (<= (+ main_p.offset 196) main_q.offset) (<= main_q.offset 196) .cse0) (and (<= main_q.offset 124) (<= (+ main_p.offset 124) main_q.offset) .cse0) (and (<= (+ main_p.offset 308) main_q.offset) (<= main_q.offset 308) .cse0) (and (<= main_q.offset 240) (<= (+ main_p.offset 240) main_q.offset) .cse0) (and (<= main_q.offset 332) (<= (+ main_p.offset 332) main_q.offset) .cse0) (and (<= (+ main_p.offset 296) main_q.offset) (<= main_q.offset 296) .cse0) (and (<= (+ main_p.offset 268) main_q.offset) (<= main_q.offset 268) .cse0) (and (<= main_q.offset 160) (<= (+ main_p.offset 160) main_q.offset) .cse0) (and (<= main_q.offset 180) (<= (+ main_p.offset 180) main_q.offset) .cse0) (and (<= (+ main_p.offset 368) main_q.offset) (<= main_q.offset 368) .cse0) (and (<= main_q.offset 384) (<= (+ main_p.offset 384) main_q.offset) .cse0) (and (<= main_q.offset 392) (<= (+ main_p.offset 392) main_q.offset) .cse0) (and (<= main_q.offset 144) .cse0 (<= (+ main_p.offset 144) main_q.offset)) (and (<= main_q.offset 200) (<= (+ main_p.offset 200) main_q.offset) .cse0) (and (<= (+ main_p.offset 288) main_q.offset) (<= main_q.offset 288) .cse0) (and (<= main_q.offset 340) (<= (+ main_p.offset 340) main_q.offset) .cse0) (and (<= (+ main_p.offset 276) main_q.offset) (<= main_q.offset 276) .cse0) (and (<= main_q.offset 356) (<= (+ main_p.offset 356) main_q.offset) .cse0) (and (<= main_q.offset 336) (<= (+ main_p.offset 336) main_q.offset) .cse0) (and (<= (+ main_p.offset 140) main_q.offset) (<= main_q.offset 140) .cse0) (and (<= main_q.offset 244) (<= (+ main_p.offset 244) main_q.offset) .cse0) (and (<= (+ main_p.offset 312) main_q.offset) (<= main_q.offset 312) .cse0) (and (<= (+ main_p.offset 396) main_q.offset) (<= main_q.offset 396) .cse0) (and (<= main_q.offset 148) (<= (+ main_p.offset 148) main_q.offset) .cse0) (and (<= (+ main_p.offset 352) main_q.offset) (<= main_q.offset 352) .cse0) (and (<= main_q.offset 344) (<= (+ main_p.offset 344) main_q.offset) .cse0) (and (<= main_q.offset 164) (<= (+ main_p.offset 164) main_q.offset) .cse0) (and (<= (+ main_p.offset 304) main_q.offset) (<= main_q.offset 304) .cse0) (and (<= main_q.offset 320) (<= (+ main_p.offset 320) main_q.offset) .cse0) (and (<= (+ main_p.offset 36) main_q.offset) (<= main_q.offset 36) .cse0) (and (<= (+ main_p.offset 44) main_q.offset) (<= main_q.offset 44) .cse0) (and (<= (+ main_p.offset 228) main_q.offset) (<= main_q.offset 228) .cse0) (and (<= (+ main_p.offset 284) main_q.offset) (<= main_q.offset 284) .cse0) (and (<= (+ main_p.offset 188) main_q.offset) (<= main_q.offset 188) .cse0) (and (<= (+ main_p.offset 8) main_q.offset) (<= main_q.offset 8) .cse0) (and (<= main_q.offset 348) .cse0 (<= (+ main_p.offset 348) main_q.offset)) (<= (+ main_p.offset 400) main_q.offset) (and (<= (+ main_p.offset 224) main_q.offset) (<= main_q.offset 224) .cse0) (and (<= (+ main_p.offset 120) main_q.offset) (<= main_q.offset 120) .cse0) (and (<= main_q.offset 232) (<= (+ main_p.offset 232) main_q.offset) .cse0) (and (<= main_q.offset 92) (<= (+ main_p.offset 92) main_q.offset) .cse0) (and (<= main_q.offset 236) (<= (+ main_p.offset 236) main_q.offset) .cse0) (and (<= (+ main_p.offset 328) main_q.offset) (<= main_q.offset 328) .cse0) (and (<= main_q.offset 12) (<= (+ main_p.offset 12) main_q.offset) .cse0) (and (<= (+ main_p.offset 64) main_q.offset) (<= main_q.offset 64) .cse0) (and (<= (+ main_p.offset 192) main_q.offset) (<= main_q.offset 192) .cse0) (and (<= (+ main_p.offset 104) main_q.offset) (<= main_q.offset 104) .cse0) (and (<= main_q.offset 280) (<= (+ main_p.offset 280) main_q.offset) .cse0) (and (<= (+ main_p.offset 316) main_q.offset) (<= main_q.offset 316) .cse0) (and (<= main_q.offset 152) (<= (+ main_p.offset 152) main_q.offset) .cse0) (and (<= (+ main_p.offset 248) main_q.offset) (<= main_q.offset 248) .cse0) (and (<= main_q.offset 28) (<= (+ main_p.offset 28) main_q.offset) .cse0) (and (<= (+ main_p.offset 68) main_q.offset) (<= main_q.offset 68) .cse0) (and (<= main_q.offset 4) .cse0 (<= (+ main_p.offset 4) main_q.offset)) (and (<= (+ main_p.offset 204) main_q.offset) (<= main_q.offset 204) .cse0) (and (<= main_q.offset 380) (<= (+ main_p.offset 380) main_q.offset) .cse0) (and (<= main_q.offset 52) (<= (+ main_p.offset 52) main_q.offset) .cse0) (and (<= (+ main_p.offset 172) main_q.offset) (<= main_q.offset 172) .cse0) (and (<= main_q.offset 56) (<= (+ main_p.offset 56) main_q.offset) .cse0) (and (<= main_q.offset 60) (<= (+ main_p.offset 60) main_q.offset) .cse0) (and (<= main_q.offset 100) (<= (+ main_p.offset 100) main_q.offset) .cse0) (and (<= main_q.offset 208) (<= (+ main_p.offset 208) main_q.offset) .cse0) (and (<= (+ main_p.offset 220) main_q.offset) (<= main_q.offset 220) .cse0) (and (<= (+ main_p.offset 132) main_q.offset) (<= main_q.offset 132) .cse0) (and (<= main_q.offset 176) (<= (+ main_p.offset 176) main_q.offset) .cse0) (and (<= main_q.offset 116) (<= (+ main_p.offset 116) main_q.offset) .cse0) (and (<= (+ main_p.offset 136) main_q.offset) (<= main_q.offset 136) .cse0) (and (<= main_q.offset 184) (<= (+ main_p.offset 184) main_q.offset) .cse0) (and (<= main_q.offset 20) (<= (+ main_p.offset 20) main_q.offset) .cse0) (and (<= (+ main_p.offset 216) main_q.offset) (<= main_q.offset 216) .cse0) (and (<= (+ main_p.offset 376) main_q.offset) (<= main_q.offset 376) .cse0) (and (<= (+ main_p.offset 324) main_q.offset) (<= main_q.offset 324) .cse0) (and (<= (+ main_p.offset 72) main_q.offset) (<= main_q.offset 72) .cse0) (and (<= main_q.offset 76) (<= (+ main_p.offset 76) main_q.offset) .cse0) (and (<= main_q.offset 16) (<= (+ main_p.offset 16) main_q.offset) .cse0) (and (<= main_q.offset 84) (<= (+ main_p.offset 84) main_q.offset) .cse0) (and (<= (+ main_p.offset 156) main_q.offset) (<= main_q.offset 156) .cse0) (and (<= (+ main_p.offset 364) main_q.offset) (<= main_q.offset 364) .cse0) (and (<= (+ main_p.offset 88) main_q.offset) .cse0 (<= main_q.offset 88)) (and (<= main_q.offset 168) (<= (+ main_p.offset 168) main_q.offset) .cse0) (and (<= (+ main_p.offset 48) main_q.offset) (<= main_q.offset 48) .cse0) (and (<= main_q.offset 252) (<= (+ main_p.offset 252) main_q.offset) .cse0) (and (<= (+ main_p.offset 264) main_q.offset) (<= main_q.offset 264) .cse0) (and (<= (+ main_p.offset 388) main_q.offset) (<= main_q.offset 388) .cse0) (and (<= main_q.offset 0) .cse0 (= main_p.offset main_q.offset)) (and (<= (+ main_p.offset 40) main_q.offset) (<= main_q.offset 40) .cse0) (and (<= main_q.offset 256) (<= (+ main_p.offset 256) main_q.offset) .cse0) (and (<= main_q.offset 300) .cse0 (<= (+ main_p.offset 300) main_q.offset)) (and (<= (+ main_p.offset 80) main_q.offset) (<= main_q.offset 80) .cse0) (and (<= main_q.offset 108) .cse0 (<= (+ main_p.offset 108) main_q.offset)) (and (<= main_q.offset 212) (<= (+ main_p.offset 212) main_q.offset) .cse0) (and (<= main_q.offset 372) (<= (+ main_p.offset 372) main_q.offset) .cse0) (and (<= (+ main_p.offset 96) main_q.offset) .cse0 (<= main_q.offset 96)) (and (<= (+ main_p.offset 272) main_q.offset) (<= main_q.offset 272) .cse0) (and (<= main_q.offset 292) (<= (+ main_p.offset 292) main_q.offset) .cse0) (and (<= (+ main_p.offset 360) main_q.offset) (<= main_q.offset 360) .cse0) (and (<= main_q.offset 32) (<= (+ main_p.offset 32) main_q.offset) .cse0) (and (<= (+ main_p.offset 24) main_q.offset) (<= main_q.offset 24) .cse0))) [2019-01-08 14:04:44,866 INFO L448 ceAbstractionStarter]: For program point L13-2(lines 3 24) no Hoare annotation was computed. [2019-01-08 14:04:44,921 INFO L202 PluginConnector]: Adding new model PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.01 02:04:44 BoogieIcfgContainer [2019-01-08 14:04:44,921 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-08 14:04:44,922 INFO L168 Benchmark]: Toolchain (without parser) took 758966.17 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 1.0 GB). Free memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: -325.1 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2019-01-08 14:04:44,923 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 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. [2019-01-08 14:04:44,923 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.66 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. [2019-01-08 14:04:44,923 INFO L168 Benchmark]: Boogie Preprocessor took 24.66 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. [2019-01-08 14:04:44,923 INFO L168 Benchmark]: RCFGBuilder took 401.51 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. [2019-01-08 14:04:44,924 INFO L168 Benchmark]: TraceAbstraction took 758467.74 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 1.0 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -346.3 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2019-01-08 14:04:44,925 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 67.66 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 24.66 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 401.51 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 758467.74 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 1.0 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -346.3 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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: 13]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((q!offset <= 112 && p!offset + 112 <= q!offset) && 400 <= #length[q!base]) || ((q!offset <= 260 && p!offset + 260 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 128 <= q!offset && q!offset <= 128) && 400 <= #length[q!base])) || ((p!offset + 196 <= q!offset && q!offset <= 196) && 400 <= #length[q!base])) || ((q!offset <= 124 && p!offset + 124 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 308 <= q!offset && q!offset <= 308) && 400 <= #length[q!base])) || ((q!offset <= 240 && p!offset + 240 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 332 && p!offset + 332 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 296 <= q!offset && q!offset <= 296) && 400 <= #length[q!base])) || ((p!offset + 268 <= q!offset && q!offset <= 268) && 400 <= #length[q!base])) || ((q!offset <= 160 && p!offset + 160 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 180 && p!offset + 180 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 368 <= q!offset && q!offset <= 368) && 400 <= #length[q!base])) || ((q!offset <= 384 && p!offset + 384 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 392 && p!offset + 392 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 144 && 400 <= #length[q!base]) && p!offset + 144 <= q!offset)) || ((q!offset <= 200 && p!offset + 200 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 288 <= q!offset && q!offset <= 288) && 400 <= #length[q!base])) || ((q!offset <= 340 && p!offset + 340 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 276 <= q!offset && q!offset <= 276) && 400 <= #length[q!base])) || ((q!offset <= 356 && p!offset + 356 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 336 && p!offset + 336 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 140 <= q!offset && q!offset <= 140) && 400 <= #length[q!base])) || ((q!offset <= 244 && p!offset + 244 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 312 <= q!offset && q!offset <= 312) && 400 <= #length[q!base])) || ((p!offset + 396 <= q!offset && q!offset <= 396) && 400 <= #length[q!base])) || ((q!offset <= 148 && p!offset + 148 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 352 <= q!offset && q!offset <= 352) && 400 <= #length[q!base])) || ((q!offset <= 344 && p!offset + 344 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 164 && p!offset + 164 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 304 <= q!offset && q!offset <= 304) && 400 <= #length[q!base])) || ((q!offset <= 320 && p!offset + 320 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 36 <= q!offset && q!offset <= 36) && 400 <= #length[q!base])) || ((p!offset + 44 <= q!offset && q!offset <= 44) && 400 <= #length[q!base])) || ((p!offset + 228 <= q!offset && q!offset <= 228) && 400 <= #length[q!base])) || ((p!offset + 284 <= q!offset && q!offset <= 284) && 400 <= #length[q!base])) || ((p!offset + 188 <= q!offset && q!offset <= 188) && 400 <= #length[q!base])) || ((p!offset + 8 <= q!offset && q!offset <= 8) && 400 <= #length[q!base])) || ((q!offset <= 348 && 400 <= #length[q!base]) && p!offset + 348 <= q!offset)) || p!offset + 400 <= q!offset) || ((p!offset + 224 <= q!offset && q!offset <= 224) && 400 <= #length[q!base])) || ((p!offset + 120 <= q!offset && q!offset <= 120) && 400 <= #length[q!base])) || ((q!offset <= 232 && p!offset + 232 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 92 && p!offset + 92 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 236 && p!offset + 236 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 328 <= q!offset && q!offset <= 328) && 400 <= #length[q!base])) || ((q!offset <= 12 && p!offset + 12 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 64 <= q!offset && q!offset <= 64) && 400 <= #length[q!base])) || ((p!offset + 192 <= q!offset && q!offset <= 192) && 400 <= #length[q!base])) || ((p!offset + 104 <= q!offset && q!offset <= 104) && 400 <= #length[q!base])) || ((q!offset <= 280 && p!offset + 280 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 316 <= q!offset && q!offset <= 316) && 400 <= #length[q!base])) || ((q!offset <= 152 && p!offset + 152 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 248 <= q!offset && q!offset <= 248) && 400 <= #length[q!base])) || ((q!offset <= 28 && p!offset + 28 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 68 <= q!offset && q!offset <= 68) && 400 <= #length[q!base])) || ((q!offset <= 4 && 400 <= #length[q!base]) && p!offset + 4 <= q!offset)) || ((p!offset + 204 <= q!offset && q!offset <= 204) && 400 <= #length[q!base])) || ((q!offset <= 380 && p!offset + 380 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 52 && p!offset + 52 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 172 <= q!offset && q!offset <= 172) && 400 <= #length[q!base])) || ((q!offset <= 56 && p!offset + 56 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 60 && p!offset + 60 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 100 && p!offset + 100 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 208 && p!offset + 208 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 220 <= q!offset && q!offset <= 220) && 400 <= #length[q!base])) || ((p!offset + 132 <= q!offset && q!offset <= 132) && 400 <= #length[q!base])) || ((q!offset <= 176 && p!offset + 176 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 116 && p!offset + 116 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 136 <= q!offset && q!offset <= 136) && 400 <= #length[q!base])) || ((q!offset <= 184 && p!offset + 184 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 20 && p!offset + 20 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 216 <= q!offset && q!offset <= 216) && 400 <= #length[q!base])) || ((p!offset + 376 <= q!offset && q!offset <= 376) && 400 <= #length[q!base])) || ((p!offset + 324 <= q!offset && q!offset <= 324) && 400 <= #length[q!base])) || ((p!offset + 72 <= q!offset && q!offset <= 72) && 400 <= #length[q!base])) || ((q!offset <= 76 && p!offset + 76 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 16 && p!offset + 16 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 84 && p!offset + 84 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 156 <= q!offset && q!offset <= 156) && 400 <= #length[q!base])) || ((p!offset + 364 <= q!offset && q!offset <= 364) && 400 <= #length[q!base])) || ((p!offset + 88 <= q!offset && 400 <= #length[q!base]) && q!offset <= 88)) || ((q!offset <= 168 && p!offset + 168 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 48 <= q!offset && q!offset <= 48) && 400 <= #length[q!base])) || ((q!offset <= 252 && p!offset + 252 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 264 <= q!offset && q!offset <= 264) && 400 <= #length[q!base])) || ((p!offset + 388 <= q!offset && q!offset <= 388) && 400 <= #length[q!base])) || ((q!offset <= 0 && 400 <= #length[q!base]) && p!offset == q!offset)) || ((p!offset + 40 <= q!offset && q!offset <= 40) && 400 <= #length[q!base])) || ((q!offset <= 256 && p!offset + 256 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 300 && 400 <= #length[q!base]) && p!offset + 300 <= q!offset)) || ((p!offset + 80 <= q!offset && q!offset <= 80) && 400 <= #length[q!base])) || ((q!offset <= 108 && 400 <= #length[q!base]) && p!offset + 108 <= q!offset)) || ((q!offset <= 212 && p!offset + 212 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 372 && p!offset + 372 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 96 <= q!offset && 400 <= #length[q!base]) && q!offset <= 96)) || ((p!offset + 272 <= q!offset && q!offset <= 272) && 400 <= #length[q!base])) || ((q!offset <= 292 && p!offset + 292 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 360 <= q!offset && q!offset <= 360) && 400 <= #length[q!base])) || ((q!offset <= 32 && p!offset + 32 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 24 <= q!offset && q!offset <= 24) && 400 <= #length[q!base]) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 8 locations, 1 error locations. SAFE Result, 758.2s OverallTime, 101 OverallIterations, 101 TraceHistogramMax, 45.4s AutomataDifference, 0.0s DeadEndRemovalTime, 2.9s HoareAnnotationTime, HoareTripleCheckerStatistics: 403 SDtfs, 7610 SDslu, 7951 SDs, 0 SdLazy, 28139 SolverSat, 355 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46154 GetRequests, 30803 SyntacticMatches, 2649 SemanticMatches, 12702 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303267 ImplicationChecksByTransitivity, 648.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=405occurred in iteration=100, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 101 MinimizatonAttempts, 100 StatesRemovedByMinimization, 100 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 102 NumberOfFragments, 1404 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 1 FomulaSimplificationsInter, 7 FormulaSimplificationTreeSizeReductionInter, 2.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 14.7s SatisfiabilityAnalysisTime, 682.0s InterpolantComputationTime, 41204 NumberOfCodeBlocks, 41204 NumberOfCodeBlocksAsserted, 1884 NumberOfCheckSat, 61503 ConstructedInterpolants, 0 QuantifiedInterpolants, 126003756 SizeOfPredicates, 596 NumberOfNonLiveVariables, 37650 ConjunctsInSsa, 15943 ConjunctsInUnsatCore, 301 InterpolantComputations, 1 PerfectInterpolantSequences, 59603/2045250 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...