java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_compound_oct_cong.epf -i ../../../trunk/examples/programs/real-life/RailwayCrossing.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 17:13:10,533 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 17:13:10,535 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 17:13:10,547 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 17:13:10,547 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 17:13:10,548 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 17:13:10,550 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 17:13:10,552 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 17:13:10,554 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 17:13:10,555 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 17:13:10,556 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-12-03 17:13:10,583 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_compound_oct_cong.epf [2018-12-03 17:13:10,607 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 17:13:10,610 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 17:13:10,611 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 17:13:10,611 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 17:13:10,611 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 17:13:10,611 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 17:13:10,612 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 17:13:10,612 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 17:13:10,612 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 17:13:10,612 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 17:13:10,612 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 17:13:10,614 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 17:13:10,614 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 17:13:10,615 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 17:13:10,616 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 17:13:10,616 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 17:13:10,616 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 17:13:10,616 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 17:13:10,616 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 17:13:10,617 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 17:13:10,617 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 17:13:10,617 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 17:13:10,617 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 17:13:10,617 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 17:13:10,617 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 17:13:10,621 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 17:13:10,621 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 17:13:10,621 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 17:13:10,621 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 17:13:10,622 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 17:13:10,622 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 17:13:10,622 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 17:13:10,622 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 17:13:10,622 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 17:13:10,624 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 17:13:10,624 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 17:13:10,624 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 17:13:10,624 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 17:13:10,624 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 17:13:10,664 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 17:13:10,680 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 17:13:10,684 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 17:13:10,686 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 17:13:10,687 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 17:13:10,688 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/RailwayCrossing.bpl [2018-12-03 17:13:10,688 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/RailwayCrossing.bpl' [2018-12-03 17:13:10,728 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 17:13:10,730 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 17:13:10,731 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 17:13:10,731 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 17:13:10,732 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 17:13:10,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:13:10" (1/1) ... [2018-12-03 17:13:10,764 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:13:10" (1/1) ... [2018-12-03 17:13:10,772 WARN L165 Inliner]: Program contained no entry procedure! [2018-12-03 17:13:10,773 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-12-03 17:13:10,773 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-12-03 17:13:10,775 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 17:13:10,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 17:13:10,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 17:13:10,778 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 17:13:10,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:13:10" (1/1) ... [2018-12-03 17:13:10,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:13:10" (1/1) ... [2018-12-03 17:13:10,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:13:10" (1/1) ... [2018-12-03 17:13:10,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:13:10" (1/1) ... [2018-12-03 17:13:10,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:13:10" (1/1) ... [2018-12-03 17:13:10,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:13:10" (1/1) ... [2018-12-03 17:13:10,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:13:10" (1/1) ... [2018-12-03 17:13:10,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 17:13:10,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 17:13:10,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 17:13:10,806 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 17:13:10,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:13:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 17:13:10,891 INFO L124 BoogieDeclarations]: Specification and implementation of procedure GateController given in one single declaration [2018-12-03 17:13:10,891 INFO L130 BoogieDeclarations]: Found specification of procedure GateController [2018-12-03 17:13:10,891 INFO L138 BoogieDeclarations]: Found implementation of procedure GateController [2018-12-03 17:13:11,216 INFO L272 CfgBuilder]: Using library mode [2018-12-03 17:13:11,216 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-03 17:13:11,217 INFO L202 PluginConnector]: Adding new model RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:13:11 BoogieIcfgContainer [2018-12-03 17:13:11,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 17:13:11,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 17:13:11,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 17:13:11,222 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 17:13:11,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:13:10" (1/2) ... [2018-12-03 17:13:11,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@128a47d1 and model type RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 05:13:11, skipping insertion in model container [2018-12-03 17:13:11,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:13:11" (2/2) ... [2018-12-03 17:13:11,225 INFO L112 eAbstractionObserver]: Analyzing ICFG RailwayCrossing.bpl [2018-12-03 17:13:11,235 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 17:13:11,243 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 17:13:11,263 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 17:13:11,298 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 17:13:11,299 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 17:13:11,299 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 17:13:11,299 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 17:13:11,299 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 17:13:11,300 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 17:13:11,300 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 17:13:11,300 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 17:13:11,317 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-12-03 17:13:11,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-03 17:13:11,324 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:11,325 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-03 17:13:11,328 INFO L423 AbstractCegarLoop]: === Iteration 1 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:11,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:11,336 INFO L82 PathProgramCache]: Analyzing trace with hash 30496, now seen corresponding path program 1 times [2018-12-03 17:13:11,339 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:11,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:11,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:11,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:11,399 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:11,513 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 17:13:11,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 17:13:11,514 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 17:13:11,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 17:13:11,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 17:13:11,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 17:13:11,539 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-12-03 17:13:11,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:11,635 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-12-03 17:13:11,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 17:13:11,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-03 17:13:11,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:11,662 INFO L225 Difference]: With dead ends: 19 [2018-12-03 17:13:11,663 INFO L226 Difference]: Without dead ends: 13 [2018-12-03 17:13:11,668 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 17:13:11,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-03 17:13:11,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 9. [2018-12-03 17:13:11,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-03 17:13:11,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2018-12-03 17:13:11,708 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 3 [2018-12-03 17:13:11,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:11,709 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 12 transitions. [2018-12-03 17:13:11,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 17:13:11,709 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2018-12-03 17:13:11,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-03 17:13:11,710 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:11,710 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-03 17:13:11,710 INFO L423 AbstractCegarLoop]: === Iteration 2 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:11,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:11,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1863215691, now seen corresponding path program 1 times [2018-12-03 17:13:11,711 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:11,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:11,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:11,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:11,713 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:11,784 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 17:13:11,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 17:13:11,785 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 17:13:11,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 17:13:11,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 17:13:11,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 17:13:11,787 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand 3 states. [2018-12-03 17:13:11,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:11,822 INFO L93 Difference]: Finished difference Result 16 states and 22 transitions. [2018-12-03 17:13:11,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 17:13:11,823 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-12-03 17:13:11,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:11,824 INFO L225 Difference]: With dead ends: 16 [2018-12-03 17:13:11,824 INFO L226 Difference]: Without dead ends: 9 [2018-12-03 17:13:11,825 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 17:13:11,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-12-03 17:13:11,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-12-03 17:13:11,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-03 17:13:11,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2018-12-03 17:13:11,828 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2018-12-03 17:13:11,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:11,829 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2018-12-03 17:13:11,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 17:13:11,829 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2018-12-03 17:13:11,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-03 17:13:11,830 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:11,830 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 17:13:11,830 INFO L423 AbstractCegarLoop]: === Iteration 3 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:11,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:11,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1926837521, now seen corresponding path program 1 times [2018-12-03 17:13:11,831 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:11,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:11,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:11,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:11,833 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:12,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:12,005 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:12,007 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 9 with the following transitions: [2018-12-03 17:13:12,009 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [13], [16], [20], [22], [23] [2018-12-03 17:13:12,091 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 17:13:12,091 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 17:13:12,738 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 17:13:12,745 INFO L272 AbstractInterpreter]: Visited 8 different actions 118 times. Merged at 5 different actions 91 times. Widened at 1 different actions 15 times. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-03 17:13:12,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:12,791 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 17:13:12,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:12,792 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:12,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:12,804 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:13:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:12,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:13,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:13,012 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:13,185 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:13,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2018-12-03 17:13:13,185 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:13,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-03 17:13:13,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-03 17:13:13,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2018-12-03 17:13:13,188 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 6 states. [2018-12-03 17:13:13,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:13,259 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2018-12-03 17:13:13,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 17:13:13,261 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2018-12-03 17:13:13,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:13,262 INFO L225 Difference]: With dead ends: 20 [2018-12-03 17:13:13,262 INFO L226 Difference]: Without dead ends: 18 [2018-12-03 17:13:13,263 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2018-12-03 17:13:13,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-12-03 17:13:13,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2018-12-03 17:13:13,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-03 17:13:13,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2018-12-03 17:13:13,267 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2018-12-03 17:13:13,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:13,267 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2018-12-03 17:13:13,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-03 17:13:13,268 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2018-12-03 17:13:13,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-03 17:13:13,268 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:13,269 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1] [2018-12-03 17:13:13,273 INFO L423 AbstractCegarLoop]: === Iteration 4 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:13,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:13,274 INFO L82 PathProgramCache]: Analyzing trace with hash 640583104, now seen corresponding path program 2 times [2018-12-03 17:13:13,274 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:13,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:13,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:13,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:13,276 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:13,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:13,456 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:13,456 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:13,459 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:13,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:13,459 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:13,472 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:13:13,473 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:13:13,490 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-03 17:13:13,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:13,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:13,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:13,835 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:13,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:13,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2018-12-03 17:13:13,930 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:13,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 17:13:13,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 17:13:13,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2018-12-03 17:13:13,931 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand 8 states. [2018-12-03 17:13:14,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:14,014 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2018-12-03 17:13:14,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 17:13:14,016 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-12-03 17:13:14,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:14,017 INFO L225 Difference]: With dead ends: 25 [2018-12-03 17:13:14,017 INFO L226 Difference]: Without dead ends: 23 [2018-12-03 17:13:14,018 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2018-12-03 17:13:14,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-03 17:13:14,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-12-03 17:13:14,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-03 17:13:14,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2018-12-03 17:13:14,023 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 13 [2018-12-03 17:13:14,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:14,024 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-12-03 17:13:14,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 17:13:14,024 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2018-12-03 17:13:14,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-03 17:13:14,025 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:14,025 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1] [2018-12-03 17:13:14,025 INFO L423 AbstractCegarLoop]: === Iteration 5 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:14,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:14,025 INFO L82 PathProgramCache]: Analyzing trace with hash -297055631, now seen corresponding path program 3 times [2018-12-03 17:13:14,025 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:14,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:14,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:14,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:14,027 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:14,122 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:14,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:14,123 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:14,123 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:14,123 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:14,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:14,124 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:14,133 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:13:14,134 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:13:14,145 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:13:14,145 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:14,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:14,394 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:14,511 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:14,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2018-12-03 17:13:14,511 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:14,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-03 17:13:14,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-03 17:13:14,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=97, Unknown=0, NotChecked=0, Total=182 [2018-12-03 17:13:14,512 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 10 states. [2018-12-03 17:13:14,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:14,553 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2018-12-03 17:13:14,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-03 17:13:14,554 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-12-03 17:13:14,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:14,555 INFO L225 Difference]: With dead ends: 30 [2018-12-03 17:13:14,555 INFO L226 Difference]: Without dead ends: 28 [2018-12-03 17:13:14,555 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=97, Unknown=0, NotChecked=0, Total=182 [2018-12-03 17:13:14,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-03 17:13:14,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2018-12-03 17:13:14,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-03 17:13:14,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2018-12-03 17:13:14,560 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 18 [2018-12-03 17:13:14,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:14,561 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2018-12-03 17:13:14,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-03 17:13:14,561 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2018-12-03 17:13:14,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-03 17:13:14,562 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:14,562 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1] [2018-12-03 17:13:14,562 INFO L423 AbstractCegarLoop]: === Iteration 6 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:14,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:14,562 INFO L82 PathProgramCache]: Analyzing trace with hash 2073218144, now seen corresponding path program 4 times [2018-12-03 17:13:14,563 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:14,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:14,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:14,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:14,564 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:14,692 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:14,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:14,693 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:14,693 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:14,693 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:14,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:14,694 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:14,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:14,723 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:13:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:14,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:15,271 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:15,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:15,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2018-12-03 17:13:15,426 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:15,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-03 17:13:15,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-03 17:13:15,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2018-12-03 17:13:15,427 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 12 states. [2018-12-03 17:13:15,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:15,646 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2018-12-03 17:13:15,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-03 17:13:15,646 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-12-03 17:13:15,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:15,647 INFO L225 Difference]: With dead ends: 35 [2018-12-03 17:13:15,648 INFO L226 Difference]: Without dead ends: 33 [2018-12-03 17:13:15,648 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2018-12-03 17:13:15,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-03 17:13:15,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2018-12-03 17:13:15,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-03 17:13:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2018-12-03 17:13:15,654 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 23 [2018-12-03 17:13:15,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:15,654 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2018-12-03 17:13:15,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-03 17:13:15,655 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2018-12-03 17:13:15,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-03 17:13:15,655 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:15,656 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1] [2018-12-03 17:13:15,656 INFO L423 AbstractCegarLoop]: === Iteration 7 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:15,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:15,656 INFO L82 PathProgramCache]: Analyzing trace with hash -609605679, now seen corresponding path program 5 times [2018-12-03 17:13:15,656 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:15,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:15,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:15,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:15,658 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:15,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:15,861 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:15,861 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:15,862 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:15,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:15,862 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:15,871 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:13:15,871 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:13:15,964 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-03 17:13:15,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:15,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:16,473 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:16,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:16,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2018-12-03 17:13:16,657 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:16,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-03 17:13:16,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-03 17:13:16,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=205, Unknown=0, NotChecked=0, Total=380 [2018-12-03 17:13:16,658 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand 14 states. [2018-12-03 17:13:16,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:16,738 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2018-12-03 17:13:16,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-03 17:13:16,744 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2018-12-03 17:13:16,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:16,745 INFO L225 Difference]: With dead ends: 40 [2018-12-03 17:13:16,745 INFO L226 Difference]: Without dead ends: 38 [2018-12-03 17:13:16,746 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=175, Invalid=205, Unknown=0, NotChecked=0, Total=380 [2018-12-03 17:13:16,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-03 17:13:16,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2018-12-03 17:13:16,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-03 17:13:16,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2018-12-03 17:13:16,752 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 28 [2018-12-03 17:13:16,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:16,752 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2018-12-03 17:13:16,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-03 17:13:16,752 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2018-12-03 17:13:16,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-03 17:13:16,753 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:16,754 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1] [2018-12-03 17:13:16,754 INFO L423 AbstractCegarLoop]: === Iteration 8 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:16,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:16,754 INFO L82 PathProgramCache]: Analyzing trace with hash -70825216, now seen corresponding path program 6 times [2018-12-03 17:13:16,754 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:16,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:16,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:16,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:16,756 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:16,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:16,931 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:16,932 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:16,932 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:16,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:16,932 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:16,950 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:13:16,951 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:13:16,970 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:13:16,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:16,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:17,208 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:17,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:17,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2018-12-03 17:13:17,437 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:17,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-03 17:13:17,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-03 17:13:17,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=274, Unknown=0, NotChecked=0, Total=506 [2018-12-03 17:13:17,438 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand 16 states. [2018-12-03 17:13:17,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:17,533 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2018-12-03 17:13:17,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-03 17:13:17,533 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2018-12-03 17:13:17,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:17,534 INFO L225 Difference]: With dead ends: 45 [2018-12-03 17:13:17,534 INFO L226 Difference]: Without dead ends: 43 [2018-12-03 17:13:17,535 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=274, Unknown=0, NotChecked=0, Total=506 [2018-12-03 17:13:17,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-03 17:13:17,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-12-03 17:13:17,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-03 17:13:17,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2018-12-03 17:13:17,543 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 33 [2018-12-03 17:13:17,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:17,544 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2018-12-03 17:13:17,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-03 17:13:17,544 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2018-12-03 17:13:17,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-03 17:13:17,545 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:17,545 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1] [2018-12-03 17:13:17,546 INFO L423 AbstractCegarLoop]: === Iteration 9 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:17,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:17,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1872481585, now seen corresponding path program 7 times [2018-12-03 17:13:17,546 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:17,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:17,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:17,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:17,548 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:17,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:17,725 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:17,725 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:17,725 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:17,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:17,726 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:17,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:17,734 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:13:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:17,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:18,030 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:18,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:18,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2018-12-03 17:13:18,428 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:18,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-03 17:13:18,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-03 17:13:18,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=353, Unknown=0, NotChecked=0, Total=650 [2018-12-03 17:13:18,430 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 18 states. [2018-12-03 17:13:18,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:18,503 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2018-12-03 17:13:18,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-03 17:13:18,504 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2018-12-03 17:13:18,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:18,506 INFO L225 Difference]: With dead ends: 50 [2018-12-03 17:13:18,506 INFO L226 Difference]: Without dead ends: 48 [2018-12-03 17:13:18,507 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=297, Invalid=353, Unknown=0, NotChecked=0, Total=650 [2018-12-03 17:13:18,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-03 17:13:18,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2018-12-03 17:13:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-03 17:13:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-12-03 17:13:18,514 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 38 [2018-12-03 17:13:18,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:18,514 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-12-03 17:13:18,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-03 17:13:18,515 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-12-03 17:13:18,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-03 17:13:18,516 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:18,516 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1] [2018-12-03 17:13:18,516 INFO L423 AbstractCegarLoop]: === Iteration 10 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:18,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:18,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1776681376, now seen corresponding path program 8 times [2018-12-03 17:13:18,517 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:18,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:18,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:18,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:18,518 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:18,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:18,706 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:18,706 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:18,706 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:18,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:18,706 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:18,717 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:13:18,717 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:13:18,737 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-03 17:13:18,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:18,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:19,001 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:19,279 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:19,300 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:19,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2018-12-03 17:13:19,300 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:19,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-03 17:13:19,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-03 17:13:19,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=442, Unknown=0, NotChecked=0, Total=812 [2018-12-03 17:13:19,306 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 20 states. [2018-12-03 17:13:19,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:19,389 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2018-12-03 17:13:19,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-03 17:13:19,390 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2018-12-03 17:13:19,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:19,390 INFO L225 Difference]: With dead ends: 55 [2018-12-03 17:13:19,391 INFO L226 Difference]: Without dead ends: 53 [2018-12-03 17:13:19,392 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=370, Invalid=442, Unknown=0, NotChecked=0, Total=812 [2018-12-03 17:13:19,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-03 17:13:19,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2018-12-03 17:13:19,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-03 17:13:19,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2018-12-03 17:13:19,399 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 43 [2018-12-03 17:13:19,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:19,399 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2018-12-03 17:13:19,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-03 17:13:19,400 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2018-12-03 17:13:19,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-12-03 17:13:19,401 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:19,401 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1] [2018-12-03 17:13:19,401 INFO L423 AbstractCegarLoop]: === Iteration 11 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:19,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:19,402 INFO L82 PathProgramCache]: Analyzing trace with hash -951698799, now seen corresponding path program 9 times [2018-12-03 17:13:19,402 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:19,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:19,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:19,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:19,403 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:19,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:19,558 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:19,558 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:19,558 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:19,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:19,559 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:19,567 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:13:19,568 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:13:19,590 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:13:19,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:19,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:21,021 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:21,022 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:21,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:21,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2018-12-03 17:13:21,419 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:21,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-03 17:13:21,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-03 17:13:21,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=541, Unknown=0, NotChecked=0, Total=992 [2018-12-03 17:13:21,421 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand 22 states. [2018-12-03 17:13:21,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:21,532 INFO L93 Difference]: Finished difference Result 60 states and 82 transitions. [2018-12-03 17:13:21,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-03 17:13:21,532 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2018-12-03 17:13:21,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:21,534 INFO L225 Difference]: With dead ends: 60 [2018-12-03 17:13:21,534 INFO L226 Difference]: Without dead ends: 58 [2018-12-03 17:13:21,535 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=451, Invalid=541, Unknown=0, NotChecked=0, Total=992 [2018-12-03 17:13:21,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-03 17:13:21,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2018-12-03 17:13:21,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-12-03 17:13:21,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2018-12-03 17:13:21,542 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 48 [2018-12-03 17:13:21,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:21,542 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2018-12-03 17:13:21,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-03 17:13:21,543 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2018-12-03 17:13:21,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-03 17:13:21,544 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:21,544 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1] [2018-12-03 17:13:21,544 INFO L423 AbstractCegarLoop]: === Iteration 12 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:21,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:21,545 INFO L82 PathProgramCache]: Analyzing trace with hash -259461056, now seen corresponding path program 10 times [2018-12-03 17:13:21,545 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:21,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:21,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:21,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:21,546 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:21,772 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:21,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:21,772 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:21,772 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:21,773 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:21,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:21,773 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:21,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:21,796 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:13:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:21,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:22,121 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:22,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:22,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2018-12-03 17:13:22,382 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:22,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-03 17:13:22,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-03 17:13:22,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=650, Unknown=0, NotChecked=0, Total=1190 [2018-12-03 17:13:22,384 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 24 states. [2018-12-03 17:13:22,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:22,629 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2018-12-03 17:13:22,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-03 17:13:22,630 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2018-12-03 17:13:22,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:22,631 INFO L225 Difference]: With dead ends: 65 [2018-12-03 17:13:22,631 INFO L226 Difference]: Without dead ends: 63 [2018-12-03 17:13:22,633 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=540, Invalid=650, Unknown=0, NotChecked=0, Total=1190 [2018-12-03 17:13:22,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-03 17:13:22,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-12-03 17:13:22,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-03 17:13:22,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2018-12-03 17:13:22,646 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 53 [2018-12-03 17:13:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:22,647 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2018-12-03 17:13:22,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-03 17:13:22,647 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2018-12-03 17:13:22,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-12-03 17:13:22,649 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:22,649 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1] [2018-12-03 17:13:22,649 INFO L423 AbstractCegarLoop]: === Iteration 13 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:22,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:22,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1213165553, now seen corresponding path program 11 times [2018-12-03 17:13:22,650 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:22,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:22,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:22,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:22,652 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:23,000 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:23,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:23,000 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:23,001 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:23,001 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:23,001 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:23,001 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:23,012 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:13:23,012 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:13:23,035 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-12-03 17:13:23,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:23,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:23,521 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:23,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:23,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2018-12-03 17:13:23,882 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:23,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-12-03 17:13:23,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-12-03 17:13:23,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=769, Unknown=0, NotChecked=0, Total=1406 [2018-12-03 17:13:23,883 INFO L87 Difference]: Start difference. First operand 59 states and 81 transitions. Second operand 26 states. [2018-12-03 17:13:23,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:23,977 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2018-12-03 17:13:23,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-03 17:13:23,978 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2018-12-03 17:13:23,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:23,978 INFO L225 Difference]: With dead ends: 70 [2018-12-03 17:13:23,978 INFO L226 Difference]: Without dead ends: 68 [2018-12-03 17:13:23,979 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=637, Invalid=769, Unknown=0, NotChecked=0, Total=1406 [2018-12-03 17:13:23,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-03 17:13:23,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2018-12-03 17:13:23,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-03 17:13:23,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2018-12-03 17:13:23,986 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 58 [2018-12-03 17:13:23,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:23,987 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 88 transitions. [2018-12-03 17:13:23,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-12-03 17:13:23,987 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 88 transitions. [2018-12-03 17:13:23,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-03 17:13:23,988 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:23,988 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1] [2018-12-03 17:13:23,988 INFO L423 AbstractCegarLoop]: === Iteration 14 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:23,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:23,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1043720480, now seen corresponding path program 12 times [2018-12-03 17:13:23,989 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:23,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:23,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:23,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:23,990 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:24,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:24,159 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:24,159 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:24,159 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:24,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:24,159 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:24,168 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:13:24,168 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:13:24,210 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:13:24,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:24,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:24,583 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:24,583 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:24,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:24,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2018-12-03 17:13:24,908 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:24,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-12-03 17:13:24,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-12-03 17:13:24,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=742, Invalid=898, Unknown=0, NotChecked=0, Total=1640 [2018-12-03 17:13:24,909 INFO L87 Difference]: Start difference. First operand 64 states and 88 transitions. Second operand 28 states. [2018-12-03 17:13:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:25,005 INFO L93 Difference]: Finished difference Result 75 states and 103 transitions. [2018-12-03 17:13:25,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-03 17:13:25,006 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2018-12-03 17:13:25,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:25,007 INFO L225 Difference]: With dead ends: 75 [2018-12-03 17:13:25,007 INFO L226 Difference]: Without dead ends: 73 [2018-12-03 17:13:25,008 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=742, Invalid=898, Unknown=0, NotChecked=0, Total=1640 [2018-12-03 17:13:25,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-12-03 17:13:25,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2018-12-03 17:13:25,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-12-03 17:13:25,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 95 transitions. [2018-12-03 17:13:25,014 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 95 transitions. Word has length 63 [2018-12-03 17:13:25,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:25,014 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 95 transitions. [2018-12-03 17:13:25,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-12-03 17:13:25,014 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 95 transitions. [2018-12-03 17:13:25,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-12-03 17:13:25,017 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:25,017 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1] [2018-12-03 17:13:25,017 INFO L423 AbstractCegarLoop]: === Iteration 15 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:25,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:25,018 INFO L82 PathProgramCache]: Analyzing trace with hash 14511441, now seen corresponding path program 13 times [2018-12-03 17:13:25,018 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:25,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:25,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:25,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:25,019 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:25,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:25,400 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:25,400 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:25,400 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:25,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:25,400 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:25,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:25,409 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:13:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:25,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:25,824 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:25,824 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:26,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:26,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2018-12-03 17:13:26,861 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:26,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-12-03 17:13:26,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-12-03 17:13:26,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=855, Invalid=1037, Unknown=0, NotChecked=0, Total=1892 [2018-12-03 17:13:26,864 INFO L87 Difference]: Start difference. First operand 69 states and 95 transitions. Second operand 30 states. [2018-12-03 17:13:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:26,985 INFO L93 Difference]: Finished difference Result 80 states and 110 transitions. [2018-12-03 17:13:26,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-03 17:13:26,989 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2018-12-03 17:13:26,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:26,990 INFO L225 Difference]: With dead ends: 80 [2018-12-03 17:13:26,990 INFO L226 Difference]: Without dead ends: 78 [2018-12-03 17:13:26,991 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=855, Invalid=1037, Unknown=0, NotChecked=0, Total=1892 [2018-12-03 17:13:26,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-12-03 17:13:26,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2018-12-03 17:13:26,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-12-03 17:13:26,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 102 transitions. [2018-12-03 17:13:26,997 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 102 transitions. Word has length 68 [2018-12-03 17:13:26,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:26,997 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 102 transitions. [2018-12-03 17:13:26,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-12-03 17:13:26,997 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 102 transitions. [2018-12-03 17:13:26,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-03 17:13:26,998 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:26,998 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1] [2018-12-03 17:13:26,999 INFO L423 AbstractCegarLoop]: === Iteration 16 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:26,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:26,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1220315776, now seen corresponding path program 14 times [2018-12-03 17:13:26,999 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:27,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:27,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:27,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:27,000 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:27,445 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:27,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:27,445 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:27,446 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:27,446 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:27,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:27,446 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:27,465 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:13:27,465 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:13:27,553 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-12-03 17:13:27,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:27,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:27,955 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:28,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:28,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2018-12-03 17:13:28,323 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:28,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-12-03 17:13:28,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-12-03 17:13:28,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=976, Invalid=1186, Unknown=0, NotChecked=0, Total=2162 [2018-12-03 17:13:28,325 INFO L87 Difference]: Start difference. First operand 74 states and 102 transitions. Second operand 32 states. [2018-12-03 17:13:28,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:28,499 INFO L93 Difference]: Finished difference Result 85 states and 117 transitions. [2018-12-03 17:13:28,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-03 17:13:28,499 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 73 [2018-12-03 17:13:28,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:28,500 INFO L225 Difference]: With dead ends: 85 [2018-12-03 17:13:28,500 INFO L226 Difference]: Without dead ends: 83 [2018-12-03 17:13:28,502 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=976, Invalid=1186, Unknown=0, NotChecked=0, Total=2162 [2018-12-03 17:13:28,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-12-03 17:13:28,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-12-03 17:13:28,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-12-03 17:13:28,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2018-12-03 17:13:28,507 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 73 [2018-12-03 17:13:28,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:28,508 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2018-12-03 17:13:28,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-12-03 17:13:28,508 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2018-12-03 17:13:28,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-12-03 17:13:28,509 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:28,509 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1] [2018-12-03 17:13:28,509 INFO L423 AbstractCegarLoop]: === Iteration 17 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:28,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:28,509 INFO L82 PathProgramCache]: Analyzing trace with hash 127283889, now seen corresponding path program 15 times [2018-12-03 17:13:28,509 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:28,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:28,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:28,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:28,510 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:28,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:28,837 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:28,838 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:28,838 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:28,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:28,838 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:28,847 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:13:28,847 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:13:28,892 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:13:28,892 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:28,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:29,305 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:29,885 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:29,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:29,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2018-12-03 17:13:29,904 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:29,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-12-03 17:13:29,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-12-03 17:13:29,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1105, Invalid=1345, Unknown=0, NotChecked=0, Total=2450 [2018-12-03 17:13:29,906 INFO L87 Difference]: Start difference. First operand 79 states and 109 transitions. Second operand 34 states. [2018-12-03 17:13:30,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:30,105 INFO L93 Difference]: Finished difference Result 90 states and 124 transitions. [2018-12-03 17:13:30,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-03 17:13:30,106 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2018-12-03 17:13:30,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:30,107 INFO L225 Difference]: With dead ends: 90 [2018-12-03 17:13:30,107 INFO L226 Difference]: Without dead ends: 88 [2018-12-03 17:13:30,108 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1105, Invalid=1345, Unknown=0, NotChecked=0, Total=2450 [2018-12-03 17:13:30,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-12-03 17:13:30,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2018-12-03 17:13:30,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-12-03 17:13:30,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 116 transitions. [2018-12-03 17:13:30,113 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 116 transitions. Word has length 78 [2018-12-03 17:13:30,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:30,113 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 116 transitions. [2018-12-03 17:13:30,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-12-03 17:13:30,114 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 116 transitions. [2018-12-03 17:13:30,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-12-03 17:13:30,114 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:30,115 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1] [2018-12-03 17:13:30,115 INFO L423 AbstractCegarLoop]: === Iteration 18 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:30,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:30,115 INFO L82 PathProgramCache]: Analyzing trace with hash -233894880, now seen corresponding path program 16 times [2018-12-03 17:13:30,115 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:30,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:30,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:30,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:30,117 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:30,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:30,383 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:30,383 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:30,383 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:30,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:30,383 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:30,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:30,393 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:13:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:30,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:30,886 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:31,262 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:31,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:31,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2018-12-03 17:13:31,283 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:31,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-03 17:13:31,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-03 17:13:31,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=1514, Unknown=0, NotChecked=0, Total=2756 [2018-12-03 17:13:31,285 INFO L87 Difference]: Start difference. First operand 84 states and 116 transitions. Second operand 36 states. [2018-12-03 17:13:31,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:31,454 INFO L93 Difference]: Finished difference Result 95 states and 131 transitions. [2018-12-03 17:13:31,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-03 17:13:31,455 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 83 [2018-12-03 17:13:31,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:31,455 INFO L225 Difference]: With dead ends: 95 [2018-12-03 17:13:31,456 INFO L226 Difference]: Without dead ends: 93 [2018-12-03 17:13:31,457 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1242, Invalid=1514, Unknown=0, NotChecked=0, Total=2756 [2018-12-03 17:13:31,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-12-03 17:13:31,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2018-12-03 17:13:31,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-03 17:13:31,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 123 transitions. [2018-12-03 17:13:31,462 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 123 transitions. Word has length 83 [2018-12-03 17:13:31,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:31,462 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 123 transitions. [2018-12-03 17:13:31,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-03 17:13:31,462 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 123 transitions. [2018-12-03 17:13:31,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-12-03 17:13:31,463 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:31,463 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1] [2018-12-03 17:13:31,463 INFO L423 AbstractCegarLoop]: === Iteration 19 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:31,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:31,464 INFO L82 PathProgramCache]: Analyzing trace with hash -610287599, now seen corresponding path program 17 times [2018-12-03 17:13:31,464 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:31,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:31,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:31,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:31,465 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:32,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:32,607 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:32,607 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:32,607 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:32,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:32,607 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:32,617 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:13:32,617 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:13:32,652 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-12-03 17:13:32,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:32,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:33,257 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:33,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:33,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2018-12-03 17:13:33,889 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:33,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-12-03 17:13:33,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-12-03 17:13:33,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1387, Invalid=1693, Unknown=0, NotChecked=0, Total=3080 [2018-12-03 17:13:33,892 INFO L87 Difference]: Start difference. First operand 89 states and 123 transitions. Second operand 38 states. [2018-12-03 17:13:34,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:34,003 INFO L93 Difference]: Finished difference Result 100 states and 138 transitions. [2018-12-03 17:13:34,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-03 17:13:34,004 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 88 [2018-12-03 17:13:34,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:34,005 INFO L225 Difference]: With dead ends: 100 [2018-12-03 17:13:34,005 INFO L226 Difference]: Without dead ends: 98 [2018-12-03 17:13:34,006 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1387, Invalid=1693, Unknown=0, NotChecked=0, Total=3080 [2018-12-03 17:13:34,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-12-03 17:13:34,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2018-12-03 17:13:34,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-12-03 17:13:34,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 130 transitions. [2018-12-03 17:13:34,011 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 130 transitions. Word has length 88 [2018-12-03 17:13:34,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:34,011 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 130 transitions. [2018-12-03 17:13:34,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-12-03 17:13:34,012 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 130 transitions. [2018-12-03 17:13:34,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-12-03 17:13:34,013 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:34,013 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1] [2018-12-03 17:13:34,013 INFO L423 AbstractCegarLoop]: === Iteration 20 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:34,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:34,013 INFO L82 PathProgramCache]: Analyzing trace with hash 2059852480, now seen corresponding path program 18 times [2018-12-03 17:13:34,014 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:34,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:34,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:34,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:34,015 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:34,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:34,326 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:34,326 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:34,327 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:34,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:34,327 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:34,336 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:13:34,336 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:13:34,362 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:13:34,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:34,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:34,823 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:35,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:35,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2018-12-03 17:13:35,317 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:35,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-12-03 17:13:35,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-12-03 17:13:35,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1882, Unknown=0, NotChecked=0, Total=3422 [2018-12-03 17:13:35,319 INFO L87 Difference]: Start difference. First operand 94 states and 130 transitions. Second operand 40 states. [2018-12-03 17:13:35,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:35,431 INFO L93 Difference]: Finished difference Result 105 states and 145 transitions. [2018-12-03 17:13:35,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-03 17:13:35,432 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 93 [2018-12-03 17:13:35,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:35,433 INFO L225 Difference]: With dead ends: 105 [2018-12-03 17:13:35,433 INFO L226 Difference]: Without dead ends: 103 [2018-12-03 17:13:35,434 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1882, Unknown=0, NotChecked=0, Total=3422 [2018-12-03 17:13:35,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-12-03 17:13:35,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-12-03 17:13:35,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-12-03 17:13:35,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 137 transitions. [2018-12-03 17:13:35,438 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 137 transitions. Word has length 93 [2018-12-03 17:13:35,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:35,438 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 137 transitions. [2018-12-03 17:13:35,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-12-03 17:13:35,439 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 137 transitions. [2018-12-03 17:13:35,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-12-03 17:13:35,439 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:35,439 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1] [2018-12-03 17:13:35,440 INFO L423 AbstractCegarLoop]: === Iteration 21 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:35,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:35,440 INFO L82 PathProgramCache]: Analyzing trace with hash -996141711, now seen corresponding path program 19 times [2018-12-03 17:13:35,440 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:35,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:35,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:35,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:35,441 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:35,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:35,733 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:35,733 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:35,733 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:35,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:35,733 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:35,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:35,743 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:13:35,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:35,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:36,264 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:37,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:37,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2018-12-03 17:13:37,222 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:37,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-12-03 17:13:37,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-12-03 17:13:37,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1701, Invalid=2081, Unknown=0, NotChecked=0, Total=3782 [2018-12-03 17:13:37,224 INFO L87 Difference]: Start difference. First operand 99 states and 137 transitions. Second operand 42 states. [2018-12-03 17:13:37,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:37,342 INFO L93 Difference]: Finished difference Result 110 states and 152 transitions. [2018-12-03 17:13:37,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-03 17:13:37,343 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 98 [2018-12-03 17:13:37,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:37,343 INFO L225 Difference]: With dead ends: 110 [2018-12-03 17:13:37,344 INFO L226 Difference]: Without dead ends: 108 [2018-12-03 17:13:37,345 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1701, Invalid=2081, Unknown=0, NotChecked=0, Total=3782 [2018-12-03 17:13:37,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-12-03 17:13:37,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2018-12-03 17:13:37,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-12-03 17:13:37,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 144 transitions. [2018-12-03 17:13:37,351 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 144 transitions. Word has length 98 [2018-12-03 17:13:37,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:37,351 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 144 transitions. [2018-12-03 17:13:37,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-12-03 17:13:37,351 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 144 transitions. [2018-12-03 17:13:37,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-12-03 17:13:37,352 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:37,352 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1] [2018-12-03 17:13:37,353 INFO L423 AbstractCegarLoop]: === Iteration 22 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:37,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:37,353 INFO L82 PathProgramCache]: Analyzing trace with hash -511385248, now seen corresponding path program 20 times [2018-12-03 17:13:37,353 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:37,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:37,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:37,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:37,354 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:37,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:37,994 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:37,994 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:37,994 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:37,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:37,994 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:38,003 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:13:38,003 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:13:38,042 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-12-03 17:13:38,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:38,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:40,462 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:41,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:41,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 64 [2018-12-03 17:13:41,056 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:41,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-12-03 17:13:41,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-12-03 17:13:41,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1870, Invalid=2290, Unknown=0, NotChecked=0, Total=4160 [2018-12-03 17:13:41,059 INFO L87 Difference]: Start difference. First operand 104 states and 144 transitions. Second operand 44 states. [2018-12-03 17:13:41,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:41,282 INFO L93 Difference]: Finished difference Result 115 states and 159 transitions. [2018-12-03 17:13:41,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-03 17:13:41,285 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 103 [2018-12-03 17:13:41,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:41,286 INFO L225 Difference]: With dead ends: 115 [2018-12-03 17:13:41,286 INFO L226 Difference]: Without dead ends: 113 [2018-12-03 17:13:41,288 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1870, Invalid=2290, Unknown=0, NotChecked=0, Total=4160 [2018-12-03 17:13:41,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-12-03 17:13:41,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2018-12-03 17:13:41,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-12-03 17:13:41,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 151 transitions. [2018-12-03 17:13:41,292 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 151 transitions. Word has length 103 [2018-12-03 17:13:41,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:41,293 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 151 transitions. [2018-12-03 17:13:41,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-12-03 17:13:41,293 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 151 transitions. [2018-12-03 17:13:41,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-12-03 17:13:41,293 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:41,293 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1] [2018-12-03 17:13:41,294 INFO L423 AbstractCegarLoop]: === Iteration 23 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:41,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:41,294 INFO L82 PathProgramCache]: Analyzing trace with hash 851260113, now seen corresponding path program 21 times [2018-12-03 17:13:41,294 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:41,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:41,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:41,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:41,295 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:41,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:41,724 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:41,724 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:41,724 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:41,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:41,724 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:41,733 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:13:41,733 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:13:41,764 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:13:41,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:41,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:42,454 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:43,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:43,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 67 [2018-12-03 17:13:43,087 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:43,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-12-03 17:13:43,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-12-03 17:13:43,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2047, Invalid=2509, Unknown=0, NotChecked=0, Total=4556 [2018-12-03 17:13:43,089 INFO L87 Difference]: Start difference. First operand 109 states and 151 transitions. Second operand 46 states. [2018-12-03 17:13:43,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:43,225 INFO L93 Difference]: Finished difference Result 120 states and 166 transitions. [2018-12-03 17:13:43,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-03 17:13:43,226 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 108 [2018-12-03 17:13:43,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:43,227 INFO L225 Difference]: With dead ends: 120 [2018-12-03 17:13:43,227 INFO L226 Difference]: Without dead ends: 118 [2018-12-03 17:13:43,227 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2047, Invalid=2509, Unknown=0, NotChecked=0, Total=4556 [2018-12-03 17:13:43,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-12-03 17:13:43,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2018-12-03 17:13:43,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-12-03 17:13:43,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 158 transitions. [2018-12-03 17:13:43,232 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 158 transitions. Word has length 108 [2018-12-03 17:13:43,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:43,233 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 158 transitions. [2018-12-03 17:13:43,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-12-03 17:13:43,233 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 158 transitions. [2018-12-03 17:13:43,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-12-03 17:13:43,234 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:43,234 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1] [2018-12-03 17:13:43,234 INFO L423 AbstractCegarLoop]: === Iteration 24 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:43,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:43,234 INFO L82 PathProgramCache]: Analyzing trace with hash -572317696, now seen corresponding path program 22 times [2018-12-03 17:13:43,235 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:43,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:43,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:43,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:43,236 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:43,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:43,604 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:43,605 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:43,605 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:43,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:43,605 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:43,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:43,615 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:13:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:43,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:44,353 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:45,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:45,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2018-12-03 17:13:45,238 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:45,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-12-03 17:13:45,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-12-03 17:13:45,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2232, Invalid=2738, Unknown=0, NotChecked=0, Total=4970 [2018-12-03 17:13:45,248 INFO L87 Difference]: Start difference. First operand 114 states and 158 transitions. Second operand 48 states. [2018-12-03 17:13:45,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:45,621 INFO L93 Difference]: Finished difference Result 125 states and 173 transitions. [2018-12-03 17:13:45,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-03 17:13:45,622 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 113 [2018-12-03 17:13:45,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:45,623 INFO L225 Difference]: With dead ends: 125 [2018-12-03 17:13:45,623 INFO L226 Difference]: Without dead ends: 123 [2018-12-03 17:13:45,624 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2232, Invalid=2738, Unknown=0, NotChecked=0, Total=4970 [2018-12-03 17:13:45,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-12-03 17:13:45,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-12-03 17:13:45,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-12-03 17:13:45,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 165 transitions. [2018-12-03 17:13:45,629 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 165 transitions. Word has length 113 [2018-12-03 17:13:45,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:45,630 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 165 transitions. [2018-12-03 17:13:45,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-12-03 17:13:45,630 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 165 transitions. [2018-12-03 17:13:45,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-12-03 17:13:45,631 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:45,631 INFO L402 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1] [2018-12-03 17:13:45,631 INFO L423 AbstractCegarLoop]: === Iteration 25 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:45,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:45,631 INFO L82 PathProgramCache]: Analyzing trace with hash 513611825, now seen corresponding path program 23 times [2018-12-03 17:13:45,631 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:45,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:45,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:45,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:45,633 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:46,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:46,180 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:46,180 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:46,180 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:46,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:46,180 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:46,190 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:13:46,190 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:13:46,236 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-12-03 17:13:46,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:46,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:46,802 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:47,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:47,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 73 [2018-12-03 17:13:47,871 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:47,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-12-03 17:13:47,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-12-03 17:13:47,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2425, Invalid=2977, Unknown=0, NotChecked=0, Total=5402 [2018-12-03 17:13:47,873 INFO L87 Difference]: Start difference. First operand 119 states and 165 transitions. Second operand 50 states. [2018-12-03 17:13:48,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:48,073 INFO L93 Difference]: Finished difference Result 130 states and 180 transitions. [2018-12-03 17:13:48,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-12-03 17:13:48,073 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 118 [2018-12-03 17:13:48,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:48,074 INFO L225 Difference]: With dead ends: 130 [2018-12-03 17:13:48,074 INFO L226 Difference]: Without dead ends: 128 [2018-12-03 17:13:48,075 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2425, Invalid=2977, Unknown=0, NotChecked=0, Total=5402 [2018-12-03 17:13:48,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-12-03 17:13:48,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2018-12-03 17:13:48,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-12-03 17:13:48,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 172 transitions. [2018-12-03 17:13:48,081 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 172 transitions. Word has length 118 [2018-12-03 17:13:48,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:48,081 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 172 transitions. [2018-12-03 17:13:48,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-12-03 17:13:48,081 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 172 transitions. [2018-12-03 17:13:48,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-12-03 17:13:48,082 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:48,082 INFO L402 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1] [2018-12-03 17:13:48,082 INFO L423 AbstractCegarLoop]: === Iteration 26 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:48,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:48,083 INFO L82 PathProgramCache]: Analyzing trace with hash -285501792, now seen corresponding path program 24 times [2018-12-03 17:13:48,083 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:48,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:48,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:48,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:48,084 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:48,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:48,484 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:48,484 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:48,484 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:48,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:48,484 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:48,494 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:13:48,495 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:13:48,526 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:13:48,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:48,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:49,382 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:50,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:50,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:50,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 76 [2018-12-03 17:13:50,234 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:50,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-12-03 17:13:50,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-12-03 17:13:50,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2626, Invalid=3226, Unknown=0, NotChecked=0, Total=5852 [2018-12-03 17:13:50,236 INFO L87 Difference]: Start difference. First operand 124 states and 172 transitions. Second operand 52 states. [2018-12-03 17:13:50,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:50,440 INFO L93 Difference]: Finished difference Result 135 states and 187 transitions. [2018-12-03 17:13:50,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-12-03 17:13:50,440 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 123 [2018-12-03 17:13:50,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:50,441 INFO L225 Difference]: With dead ends: 135 [2018-12-03 17:13:50,441 INFO L226 Difference]: Without dead ends: 133 [2018-12-03 17:13:50,442 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2626, Invalid=3226, Unknown=0, NotChecked=0, Total=5852 [2018-12-03 17:13:50,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-12-03 17:13:50,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2018-12-03 17:13:50,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-12-03 17:13:50,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 179 transitions. [2018-12-03 17:13:50,448 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 179 transitions. Word has length 123 [2018-12-03 17:13:50,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:50,448 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 179 transitions. [2018-12-03 17:13:50,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-12-03 17:13:50,449 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 179 transitions. [2018-12-03 17:13:50,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-12-03 17:13:50,449 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:50,449 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1] [2018-12-03 17:13:50,450 INFO L423 AbstractCegarLoop]: === Iteration 27 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:50,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:50,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1768277393, now seen corresponding path program 25 times [2018-12-03 17:13:50,450 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:50,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:50,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:50,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:50,451 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:50,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:50,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:50,905 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:50,905 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:50,905 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:50,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:50,906 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:50,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:50,914 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:13:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:50,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:51,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:51,590 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:52,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:52,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 79 [2018-12-03 17:13:52,806 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:52,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-12-03 17:13:52,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-12-03 17:13:52,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2835, Invalid=3485, Unknown=0, NotChecked=0, Total=6320 [2018-12-03 17:13:52,808 INFO L87 Difference]: Start difference. First operand 129 states and 179 transitions. Second operand 54 states. [2018-12-03 17:13:53,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:53,016 INFO L93 Difference]: Finished difference Result 140 states and 194 transitions. [2018-12-03 17:13:53,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-12-03 17:13:53,016 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 128 [2018-12-03 17:13:53,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:53,017 INFO L225 Difference]: With dead ends: 140 [2018-12-03 17:13:53,017 INFO L226 Difference]: Without dead ends: 138 [2018-12-03 17:13:53,018 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2835, Invalid=3485, Unknown=0, NotChecked=0, Total=6320 [2018-12-03 17:13:53,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-12-03 17:13:53,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2018-12-03 17:13:53,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-12-03 17:13:53,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 186 transitions. [2018-12-03 17:13:53,024 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 186 transitions. Word has length 128 [2018-12-03 17:13:53,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:53,025 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 186 transitions. [2018-12-03 17:13:53,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-12-03 17:13:53,025 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 186 transitions. [2018-12-03 17:13:53,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-12-03 17:13:53,025 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:53,026 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1] [2018-12-03 17:13:53,026 INFO L423 AbstractCegarLoop]: === Iteration 28 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:53,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:53,026 INFO L82 PathProgramCache]: Analyzing trace with hash -77052608, now seen corresponding path program 26 times [2018-12-03 17:13:53,026 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:53,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:53,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:53,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:53,027 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:53,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:53,514 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:53,514 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:53,514 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:53,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:53,514 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:53,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:13:53,525 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:13:53,579 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-12-03 17:13:53,579 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:53,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:54,400 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:55,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:55,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 82 [2018-12-03 17:13:55,712 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:55,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-12-03 17:13:55,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-12-03 17:13:55,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3052, Invalid=3754, Unknown=0, NotChecked=0, Total=6806 [2018-12-03 17:13:55,713 INFO L87 Difference]: Start difference. First operand 134 states and 186 transitions. Second operand 56 states. [2018-12-03 17:13:55,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:55,938 INFO L93 Difference]: Finished difference Result 145 states and 201 transitions. [2018-12-03 17:13:55,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-03 17:13:55,938 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 133 [2018-12-03 17:13:55,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:55,939 INFO L225 Difference]: With dead ends: 145 [2018-12-03 17:13:55,939 INFO L226 Difference]: Without dead ends: 143 [2018-12-03 17:13:55,940 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2862 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3052, Invalid=3754, Unknown=0, NotChecked=0, Total=6806 [2018-12-03 17:13:55,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-12-03 17:13:55,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-12-03 17:13:55,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-12-03 17:13:55,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 193 transitions. [2018-12-03 17:13:55,946 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 193 transitions. Word has length 133 [2018-12-03 17:13:55,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:55,946 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 193 transitions. [2018-12-03 17:13:55,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-12-03 17:13:55,946 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 193 transitions. [2018-12-03 17:13:55,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-12-03 17:13:55,947 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:55,947 INFO L402 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1] [2018-12-03 17:13:55,948 INFO L423 AbstractCegarLoop]: === Iteration 29 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:55,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:55,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1019034353, now seen corresponding path program 27 times [2018-12-03 17:13:55,948 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:55,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:55,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:55,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:55,949 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:56,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:56,533 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:56,533 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:56,533 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:56,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:56,533 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:56,544 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:13:56,544 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:13:56,580 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:13:56,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:56,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:57,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:57,896 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:58,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:58,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:58,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 85 [2018-12-03 17:13:58,889 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:58,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-12-03 17:13:58,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-12-03 17:13:58,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3277, Invalid=4033, Unknown=0, NotChecked=0, Total=7310 [2018-12-03 17:13:58,891 INFO L87 Difference]: Start difference. First operand 139 states and 193 transitions. Second operand 58 states. [2018-12-03 17:13:59,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:59,123 INFO L93 Difference]: Finished difference Result 150 states and 208 transitions. [2018-12-03 17:13:59,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-12-03 17:13:59,123 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 138 [2018-12-03 17:13:59,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:59,124 INFO L225 Difference]: With dead ends: 150 [2018-12-03 17:13:59,124 INFO L226 Difference]: Without dead ends: 148 [2018-12-03 17:13:59,125 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3277, Invalid=4033, Unknown=0, NotChecked=0, Total=7310 [2018-12-03 17:13:59,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-12-03 17:13:59,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2018-12-03 17:13:59,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-12-03 17:13:59,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 200 transitions. [2018-12-03 17:13:59,131 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 200 transitions. Word has length 138 [2018-12-03 17:13:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:59,131 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 200 transitions. [2018-12-03 17:13:59,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-12-03 17:13:59,131 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 200 transitions. [2018-12-03 17:13:59,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-12-03 17:13:59,132 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:59,132 INFO L402 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1] [2018-12-03 17:13:59,132 INFO L423 AbstractCegarLoop]: === Iteration 30 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:59,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:59,133 INFO L82 PathProgramCache]: Analyzing trace with hash -247256096, now seen corresponding path program 28 times [2018-12-03 17:13:59,133 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:59,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:59,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:59,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:59,134 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:59,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:59,639 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:59,640 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:59,640 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:59,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:59,640 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:59,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:59,649 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:13:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:59,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:14:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:00,447 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:14:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:01,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:14:01,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 88 [2018-12-03 17:14:01,539 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:14:01,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-12-03 17:14:01,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-12-03 17:14:01,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3510, Invalid=4322, Unknown=0, NotChecked=0, Total=7832 [2018-12-03 17:14:01,540 INFO L87 Difference]: Start difference. First operand 144 states and 200 transitions. Second operand 60 states. [2018-12-03 17:14:01,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:14:01,747 INFO L93 Difference]: Finished difference Result 155 states and 215 transitions. [2018-12-03 17:14:01,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-03 17:14:01,747 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 143 [2018-12-03 17:14:01,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:14:01,748 INFO L225 Difference]: With dead ends: 155 [2018-12-03 17:14:01,749 INFO L226 Difference]: Without dead ends: 153 [2018-12-03 17:14:01,749 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3306 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3510, Invalid=4322, Unknown=0, NotChecked=0, Total=7832 [2018-12-03 17:14:01,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-12-03 17:14:01,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2018-12-03 17:14:01,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-12-03 17:14:01,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 207 transitions. [2018-12-03 17:14:01,756 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 207 transitions. Word has length 143 [2018-12-03 17:14:01,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:14:01,756 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 207 transitions. [2018-12-03 17:14:01,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-12-03 17:14:01,756 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 207 transitions. [2018-12-03 17:14:01,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-12-03 17:14:01,757 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:14:01,757 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1] [2018-12-03 17:14:01,758 INFO L423 AbstractCegarLoop]: === Iteration 31 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:14:01,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:14:01,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1791588433, now seen corresponding path program 29 times [2018-12-03 17:14:01,758 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:14:01,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:01,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:14:01,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:01,759 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:14:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:02,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:02,933 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:14:02,933 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:14:02,933 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:14:02,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:02,934 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:14:02,942 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:14:02,942 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:14:03,007 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-12-03 17:14:03,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:14:03,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:14:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:03,833 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:14:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:04,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:14:04,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 91 [2018-12-03 17:14:04,980 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:14:04,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-12-03 17:14:04,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-12-03 17:14:04,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3751, Invalid=4621, Unknown=0, NotChecked=0, Total=8372 [2018-12-03 17:14:04,982 INFO L87 Difference]: Start difference. First operand 149 states and 207 transitions. Second operand 62 states. [2018-12-03 17:14:05,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:14:05,265 INFO L93 Difference]: Finished difference Result 160 states and 222 transitions. [2018-12-03 17:14:05,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-12-03 17:14:05,265 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 148 [2018-12-03 17:14:05,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:14:05,266 INFO L225 Difference]: With dead ends: 160 [2018-12-03 17:14:05,266 INFO L226 Difference]: Without dead ends: 158 [2018-12-03 17:14:05,267 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3540 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3751, Invalid=4621, Unknown=0, NotChecked=0, Total=8372 [2018-12-03 17:14:05,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-12-03 17:14:05,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2018-12-03 17:14:05,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-12-03 17:14:05,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 214 transitions. [2018-12-03 17:14:05,272 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 214 transitions. Word has length 148 [2018-12-03 17:14:05,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:14:05,273 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 214 transitions. [2018-12-03 17:14:05,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-12-03 17:14:05,273 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 214 transitions. [2018-12-03 17:14:05,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-12-03 17:14:05,274 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:14:05,274 INFO L402 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1] [2018-12-03 17:14:05,274 INFO L423 AbstractCegarLoop]: === Iteration 32 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:14:05,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:14:05,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1713785472, now seen corresponding path program 30 times [2018-12-03 17:14:05,275 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:14:05,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:05,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:14:05,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:05,275 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:14:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:05,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:05,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:05,893 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:14:05,893 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:14:05,894 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:14:05,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:05,894 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:14:05,903 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:14:05,903 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:14:05,942 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:14:05,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:14:05,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:14:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:06,849 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:14:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:08,464 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:14:08,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 94 [2018-12-03 17:14:08,465 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:14:08,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-12-03 17:14:08,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-12-03 17:14:08,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4000, Invalid=4930, Unknown=0, NotChecked=0, Total=8930 [2018-12-03 17:14:08,467 INFO L87 Difference]: Start difference. First operand 154 states and 214 transitions. Second operand 64 states. [2018-12-03 17:14:09,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:14:09,010 INFO L93 Difference]: Finished difference Result 165 states and 229 transitions. [2018-12-03 17:14:09,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-03 17:14:09,011 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 153 [2018-12-03 17:14:09,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:14:09,012 INFO L225 Difference]: With dead ends: 165 [2018-12-03 17:14:09,012 INFO L226 Difference]: Without dead ends: 163 [2018-12-03 17:14:09,013 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4000, Invalid=4930, Unknown=0, NotChecked=0, Total=8930 [2018-12-03 17:14:09,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-12-03 17:14:09,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-12-03 17:14:09,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-12-03 17:14:09,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 221 transitions. [2018-12-03 17:14:09,020 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 221 transitions. Word has length 153 [2018-12-03 17:14:09,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:14:09,021 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 221 transitions. [2018-12-03 17:14:09,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-12-03 17:14:09,021 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 221 transitions. [2018-12-03 17:14:09,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-12-03 17:14:09,022 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:14:09,022 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1] [2018-12-03 17:14:09,022 INFO L423 AbstractCegarLoop]: === Iteration 33 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:14:09,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:14:09,023 INFO L82 PathProgramCache]: Analyzing trace with hash -835682895, now seen corresponding path program 31 times [2018-12-03 17:14:09,023 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:14:09,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:09,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:14:09,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:09,024 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:14:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:09,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:09,612 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:14:09,612 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:14:09,612 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:14:09,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:09,613 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:14:09,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:14:09,621 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:14:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:09,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:14:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:10,712 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:14:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:12,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:14:12,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 97 [2018-12-03 17:14:12,069 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:14:12,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-12-03 17:14:12,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-12-03 17:14:12,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4257, Invalid=5249, Unknown=0, NotChecked=0, Total=9506 [2018-12-03 17:14:12,071 INFO L87 Difference]: Start difference. First operand 159 states and 221 transitions. Second operand 66 states. [2018-12-03 17:14:12,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:14:12,863 INFO L93 Difference]: Finished difference Result 170 states and 236 transitions. [2018-12-03 17:14:12,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-12-03 17:14:12,863 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 158 [2018-12-03 17:14:12,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:14:12,864 INFO L225 Difference]: With dead ends: 170 [2018-12-03 17:14:12,865 INFO L226 Difference]: Without dead ends: 168 [2018-12-03 17:14:12,867 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4032 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4257, Invalid=5249, Unknown=0, NotChecked=0, Total=9506 [2018-12-03 17:14:12,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-12-03 17:14:12,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2018-12-03 17:14:12,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-12-03 17:14:12,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 228 transitions. [2018-12-03 17:14:12,873 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 228 transitions. Word has length 158 [2018-12-03 17:14:12,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:14:12,874 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 228 transitions. [2018-12-03 17:14:12,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-12-03 17:14:12,874 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 228 transitions. [2018-12-03 17:14:12,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-12-03 17:14:12,875 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:14:12,875 INFO L402 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1] [2018-12-03 17:14:12,875 INFO L423 AbstractCegarLoop]: === Iteration 34 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:14:12,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:14:12,876 INFO L82 PathProgramCache]: Analyzing trace with hash 925606176, now seen corresponding path program 32 times [2018-12-03 17:14:12,876 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:14:12,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:12,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:14:12,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:12,877 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:14:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:13,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:13,606 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:14:13,606 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:14:13,606 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:14:13,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:13,606 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:14:13,616 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:14:13,616 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:14:13,702 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-12-03 17:14:13,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:14:13,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:14:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:14,621 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:14:15,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:16,007 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:14:16,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 100 [2018-12-03 17:14:16,008 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:14:16,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-12-03 17:14:16,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-12-03 17:14:16,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4522, Invalid=5578, Unknown=0, NotChecked=0, Total=10100 [2018-12-03 17:14:16,010 INFO L87 Difference]: Start difference. First operand 164 states and 228 transitions. Second operand 68 states. [2018-12-03 17:14:16,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:14:16,304 INFO L93 Difference]: Finished difference Result 175 states and 243 transitions. [2018-12-03 17:14:16,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-12-03 17:14:16,304 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 163 [2018-12-03 17:14:16,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:14:16,305 INFO L225 Difference]: With dead ends: 175 [2018-12-03 17:14:16,306 INFO L226 Difference]: Without dead ends: 173 [2018-12-03 17:14:16,307 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4290 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4522, Invalid=5578, Unknown=0, NotChecked=0, Total=10100 [2018-12-03 17:14:16,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-12-03 17:14:16,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2018-12-03 17:14:16,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-12-03 17:14:16,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 235 transitions. [2018-12-03 17:14:16,313 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 235 transitions. Word has length 163 [2018-12-03 17:14:16,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:14:16,313 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 235 transitions. [2018-12-03 17:14:16,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-12-03 17:14:16,313 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 235 transitions. [2018-12-03 17:14:16,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-12-03 17:14:16,314 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:14:16,314 INFO L402 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1] [2018-12-03 17:14:16,315 INFO L423 AbstractCegarLoop]: === Iteration 35 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:14:16,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:14:16,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1441248495, now seen corresponding path program 33 times [2018-12-03 17:14:16,315 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:14:16,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:16,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:14:16,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:16,316 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:14:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:18,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:18,359 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:14:18,359 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:14:18,359 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:14:18,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:18,359 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:14:18,368 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:14:18,368 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:14:18,429 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:14:18,429 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:14:18,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:14:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:19,544 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:14:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:21,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:14:21,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 103 [2018-12-03 17:14:21,061 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:14:21,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-12-03 17:14:21,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-12-03 17:14:21,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4795, Invalid=5917, Unknown=0, NotChecked=0, Total=10712 [2018-12-03 17:14:21,064 INFO L87 Difference]: Start difference. First operand 169 states and 235 transitions. Second operand 70 states. [2018-12-03 17:14:21,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:14:21,561 INFO L93 Difference]: Finished difference Result 180 states and 250 transitions. [2018-12-03 17:14:21,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-12-03 17:14:21,561 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 168 [2018-12-03 17:14:21,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:14:21,563 INFO L225 Difference]: With dead ends: 180 [2018-12-03 17:14:21,563 INFO L226 Difference]: Without dead ends: 178 [2018-12-03 17:14:21,564 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4556 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4795, Invalid=5917, Unknown=0, NotChecked=0, Total=10712 [2018-12-03 17:14:21,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-12-03 17:14:21,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2018-12-03 17:14:21,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-12-03 17:14:21,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 242 transitions. [2018-12-03 17:14:21,570 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 242 transitions. Word has length 168 [2018-12-03 17:14:21,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:14:21,570 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 242 transitions. [2018-12-03 17:14:21,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-12-03 17:14:21,571 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 242 transitions. [2018-12-03 17:14:21,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-12-03 17:14:21,571 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:14:21,572 INFO L402 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1] [2018-12-03 17:14:21,572 INFO L423 AbstractCegarLoop]: === Iteration 36 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:14:21,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:14:21,572 INFO L82 PathProgramCache]: Analyzing trace with hash 686632896, now seen corresponding path program 34 times [2018-12-03 17:14:21,572 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:14:21,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:21,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:14:21,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:21,573 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:14:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:23,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:23,173 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:14:23,173 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:14:23,173 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:14:23,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:23,173 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:14:23,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:14:23,181 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:14:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:23,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:14:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:24,283 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:14:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:25,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:14:25,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 106 [2018-12-03 17:14:25,830 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:14:25,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-12-03 17:14:25,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-12-03 17:14:25,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5076, Invalid=6266, Unknown=0, NotChecked=0, Total=11342 [2018-12-03 17:14:25,833 INFO L87 Difference]: Start difference. First operand 174 states and 242 transitions. Second operand 72 states. [2018-12-03 17:14:26,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:14:26,269 INFO L93 Difference]: Finished difference Result 185 states and 257 transitions. [2018-12-03 17:14:26,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-12-03 17:14:26,270 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 173 [2018-12-03 17:14:26,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:14:26,271 INFO L225 Difference]: With dead ends: 185 [2018-12-03 17:14:26,271 INFO L226 Difference]: Without dead ends: 183 [2018-12-03 17:14:26,272 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4830 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5076, Invalid=6266, Unknown=0, NotChecked=0, Total=11342 [2018-12-03 17:14:26,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-12-03 17:14:26,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-12-03 17:14:26,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-12-03 17:14:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 249 transitions. [2018-12-03 17:14:26,279 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 249 transitions. Word has length 173 [2018-12-03 17:14:26,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:14:26,279 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 249 transitions. [2018-12-03 17:14:26,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-12-03 17:14:26,279 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 249 transitions. [2018-12-03 17:14:26,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-12-03 17:14:26,280 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:14:26,280 INFO L402 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1] [2018-12-03 17:14:26,281 INFO L423 AbstractCegarLoop]: === Iteration 37 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:14:26,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:14:26,281 INFO L82 PathProgramCache]: Analyzing trace with hash 170319985, now seen corresponding path program 35 times [2018-12-03 17:14:26,281 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:14:26,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:26,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:14:26,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:26,282 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:14:26,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:28,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:28,241 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:14:28,241 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:14:28,241 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:14:28,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:28,241 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:14:28,251 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:14:28,251 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:14:28,329 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-12-03 17:14:28,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:14:28,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:14:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:30,022 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:14:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:31,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:14:31,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 109 [2018-12-03 17:14:31,774 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:14:31,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-12-03 17:14:31,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-12-03 17:14:31,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5365, Invalid=6625, Unknown=0, NotChecked=0, Total=11990 [2018-12-03 17:14:31,775 INFO L87 Difference]: Start difference. First operand 179 states and 249 transitions. Second operand 74 states. [2018-12-03 17:14:32,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:14:32,124 INFO L93 Difference]: Finished difference Result 190 states and 264 transitions. [2018-12-03 17:14:32,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-12-03 17:14:32,124 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 178 [2018-12-03 17:14:32,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:14:32,125 INFO L225 Difference]: With dead ends: 190 [2018-12-03 17:14:32,125 INFO L226 Difference]: Without dead ends: 188 [2018-12-03 17:14:32,126 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5112 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5365, Invalid=6625, Unknown=0, NotChecked=0, Total=11990 [2018-12-03 17:14:32,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-12-03 17:14:32,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2018-12-03 17:14:32,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-12-03 17:14:32,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 256 transitions. [2018-12-03 17:14:32,132 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 256 transitions. Word has length 178 [2018-12-03 17:14:32,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:14:32,133 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 256 transitions. [2018-12-03 17:14:32,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-12-03 17:14:32,133 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 256 transitions. [2018-12-03 17:14:32,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-12-03 17:14:32,134 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:14:32,134 INFO L402 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1] [2018-12-03 17:14:32,134 INFO L423 AbstractCegarLoop]: === Iteration 38 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:14:32,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:14:32,134 INFO L82 PathProgramCache]: Analyzing trace with hash -2021329312, now seen corresponding path program 36 times [2018-12-03 17:14:32,135 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:14:32,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:32,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:14:32,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:32,136 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:14:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:34,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:34,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:34,645 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:14:34,645 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:14:34,645 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:14:34,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:34,645 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:14:34,653 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:14:34,653 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:14:34,696 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:14:34,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:14:34,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:14:35,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:35,939 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:14:37,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:37,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:14:37,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 112 [2018-12-03 17:14:37,689 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:14:37,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-12-03 17:14:37,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-12-03 17:14:37,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5662, Invalid=6994, Unknown=0, NotChecked=0, Total=12656 [2018-12-03 17:14:37,691 INFO L87 Difference]: Start difference. First operand 184 states and 256 transitions. Second operand 76 states. [2018-12-03 17:14:38,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:14:38,163 INFO L93 Difference]: Finished difference Result 195 states and 271 transitions. [2018-12-03 17:14:38,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-12-03 17:14:38,163 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 183 [2018-12-03 17:14:38,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:14:38,165 INFO L225 Difference]: With dead ends: 195 [2018-12-03 17:14:38,165 INFO L226 Difference]: Without dead ends: 193 [2018-12-03 17:14:38,166 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5402 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5662, Invalid=6994, Unknown=0, NotChecked=0, Total=12656 [2018-12-03 17:14:38,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-12-03 17:14:38,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2018-12-03 17:14:38,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-12-03 17:14:38,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 263 transitions. [2018-12-03 17:14:38,172 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 263 transitions. Word has length 183 [2018-12-03 17:14:38,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:14:38,173 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 263 transitions. [2018-12-03 17:14:38,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-12-03 17:14:38,173 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 263 transitions. [2018-12-03 17:14:38,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-12-03 17:14:38,174 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:14:38,174 INFO L402 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1] [2018-12-03 17:14:38,174 INFO L423 AbstractCegarLoop]: === Iteration 39 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:14:38,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:14:38,175 INFO L82 PathProgramCache]: Analyzing trace with hash 578960849, now seen corresponding path program 37 times [2018-12-03 17:14:38,175 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:14:38,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:38,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:14:38,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:38,176 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:14:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:39,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:39,029 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:14:39,029 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:14:39,029 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:14:39,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:39,030 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:14:39,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:14:39,038 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:14:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:39,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:14:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:40,401 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:14:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:42,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:14:42,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 115 [2018-12-03 17:14:42,223 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:14:42,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-12-03 17:14:42,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-12-03 17:14:42,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5967, Invalid=7373, Unknown=0, NotChecked=0, Total=13340 [2018-12-03 17:14:42,225 INFO L87 Difference]: Start difference. First operand 189 states and 263 transitions. Second operand 78 states. [2018-12-03 17:14:42,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:14:42,922 INFO L93 Difference]: Finished difference Result 200 states and 278 transitions. [2018-12-03 17:14:42,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-12-03 17:14:42,923 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 188 [2018-12-03 17:14:42,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:14:42,924 INFO L225 Difference]: With dead ends: 200 [2018-12-03 17:14:42,924 INFO L226 Difference]: Without dead ends: 198 [2018-12-03 17:14:42,925 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5700 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5967, Invalid=7373, Unknown=0, NotChecked=0, Total=13340 [2018-12-03 17:14:42,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-12-03 17:14:42,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2018-12-03 17:14:42,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-12-03 17:14:42,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 270 transitions. [2018-12-03 17:14:42,933 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 270 transitions. Word has length 188 [2018-12-03 17:14:42,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:14:42,933 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 270 transitions. [2018-12-03 17:14:42,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-12-03 17:14:42,933 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 270 transitions. [2018-12-03 17:14:42,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-12-03 17:14:42,934 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:14:42,934 INFO L402 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1] [2018-12-03 17:14:42,934 INFO L423 AbstractCegarLoop]: === Iteration 40 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:14:42,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:14:42,935 INFO L82 PathProgramCache]: Analyzing trace with hash -963840768, now seen corresponding path program 38 times [2018-12-03 17:14:42,935 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:14:42,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:42,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:14:42,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:42,936 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:14:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:45,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:45,413 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:14:45,413 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:14:45,414 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:14:45,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:45,414 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:14:45,423 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:14:45,423 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:14:45,819 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-12-03 17:14:45,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:14:45,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:14:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:47,112 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:14:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:49,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:14:49,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 118 [2018-12-03 17:14:49,328 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:14:49,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-12-03 17:14:49,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-12-03 17:14:49,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6280, Invalid=7762, Unknown=0, NotChecked=0, Total=14042 [2018-12-03 17:14:49,331 INFO L87 Difference]: Start difference. First operand 194 states and 270 transitions. Second operand 80 states. [2018-12-03 17:14:49,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:14:49,731 INFO L93 Difference]: Finished difference Result 205 states and 285 transitions. [2018-12-03 17:14:49,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-12-03 17:14:49,731 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 193 [2018-12-03 17:14:49,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:14:49,732 INFO L225 Difference]: With dead ends: 205 [2018-12-03 17:14:49,732 INFO L226 Difference]: Without dead ends: 203 [2018-12-03 17:14:49,733 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6006 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=6280, Invalid=7762, Unknown=0, NotChecked=0, Total=14042 [2018-12-03 17:14:49,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-12-03 17:14:49,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-12-03 17:14:49,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-12-03 17:14:49,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 277 transitions. [2018-12-03 17:14:49,740 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 277 transitions. Word has length 193 [2018-12-03 17:14:49,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:14:49,740 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 277 transitions. [2018-12-03 17:14:49,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-12-03 17:14:49,740 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 277 transitions. [2018-12-03 17:14:49,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-12-03 17:14:49,741 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:14:49,742 INFO L402 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1] [2018-12-03 17:14:49,742 INFO L423 AbstractCegarLoop]: === Iteration 41 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:14:49,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:14:49,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1345297615, now seen corresponding path program 39 times [2018-12-03 17:14:49,742 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:14:49,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:49,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:14:49,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:49,743 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:14:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:51,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:51,444 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:14:51,444 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:14:51,444 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:14:51,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:51,444 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:14:51,454 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:14:51,454 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:14:51,502 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:14:51,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:14:51,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:14:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:52,796 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:14:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:55,103 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:14:55,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 121 [2018-12-03 17:14:55,103 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:14:55,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-12-03 17:14:55,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-12-03 17:14:55,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6601, Invalid=8161, Unknown=0, NotChecked=0, Total=14762 [2018-12-03 17:14:55,106 INFO L87 Difference]: Start difference. First operand 199 states and 277 transitions. Second operand 82 states. [2018-12-03 17:14:55,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:14:55,576 INFO L93 Difference]: Finished difference Result 210 states and 292 transitions. [2018-12-03 17:14:55,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-12-03 17:14:55,576 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 198 [2018-12-03 17:14:55,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:14:55,577 INFO L225 Difference]: With dead ends: 210 [2018-12-03 17:14:55,578 INFO L226 Difference]: Without dead ends: 208 [2018-12-03 17:14:55,579 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6320 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6601, Invalid=8161, Unknown=0, NotChecked=0, Total=14762 [2018-12-03 17:14:55,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-12-03 17:14:55,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2018-12-03 17:14:55,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-12-03 17:14:55,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 284 transitions. [2018-12-03 17:14:55,583 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 284 transitions. Word has length 198 [2018-12-03 17:14:55,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:14:55,584 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 284 transitions. [2018-12-03 17:14:55,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-12-03 17:14:55,584 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 284 transitions. [2018-12-03 17:14:55,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-12-03 17:14:55,585 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:14:55,585 INFO L402 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1] [2018-12-03 17:14:55,585 INFO L423 AbstractCegarLoop]: === Iteration 42 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:14:55,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:14:55,585 INFO L82 PathProgramCache]: Analyzing trace with hash 555690912, now seen corresponding path program 40 times [2018-12-03 17:14:55,585 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:14:55,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:55,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:14:55,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:55,586 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:14:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:56,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:56,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:56,780 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:14:56,780 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:14:56,780 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:14:56,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:56,781 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:14:56,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:14:56,790 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:14:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:56,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:14:58,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:58,221 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:15:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:00,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:15:00,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 124 [2018-12-03 17:15:00,657 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:15:00,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-12-03 17:15:00,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-12-03 17:15:00,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6930, Invalid=8570, Unknown=0, NotChecked=0, Total=15500 [2018-12-03 17:15:00,659 INFO L87 Difference]: Start difference. First operand 204 states and 284 transitions. Second operand 84 states. [2018-12-03 17:15:01,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:15:01,184 INFO L93 Difference]: Finished difference Result 215 states and 299 transitions. [2018-12-03 17:15:01,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-12-03 17:15:01,184 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 203 [2018-12-03 17:15:01,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:15:01,185 INFO L225 Difference]: With dead ends: 215 [2018-12-03 17:15:01,185 INFO L226 Difference]: Without dead ends: 213 [2018-12-03 17:15:01,186 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6642 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6930, Invalid=8570, Unknown=0, NotChecked=0, Total=15500 [2018-12-03 17:15:01,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-12-03 17:15:01,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 209. [2018-12-03 17:15:01,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-12-03 17:15:01,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 291 transitions. [2018-12-03 17:15:01,193 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 291 transitions. Word has length 203 [2018-12-03 17:15:01,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:15:01,194 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 291 transitions. [2018-12-03 17:15:01,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-12-03 17:15:01,194 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 291 transitions. [2018-12-03 17:15:01,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-12-03 17:15:01,195 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:15:01,195 INFO L402 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1] [2018-12-03 17:15:01,195 INFO L423 AbstractCegarLoop]: === Iteration 43 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:15:01,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:15:01,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1463242897, now seen corresponding path program 41 times [2018-12-03 17:15:01,196 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:15:01,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:01,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:15:01,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:01,197 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:15:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:15:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:02,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:02,429 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:15:02,429 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:15:02,429 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:15:02,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:02,429 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:15:02,439 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:15:02,439 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:15:02,534 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-12-03 17:15:02,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:15:02,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:15:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:06,070 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:15:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:08,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:15:08,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 127 [2018-12-03 17:15:08,417 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:15:08,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-12-03 17:15:08,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-12-03 17:15:08,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7267, Invalid=8989, Unknown=0, NotChecked=0, Total=16256 [2018-12-03 17:15:08,418 INFO L87 Difference]: Start difference. First operand 209 states and 291 transitions. Second operand 86 states. [2018-12-03 17:15:08,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:15:08,873 INFO L93 Difference]: Finished difference Result 220 states and 306 transitions. [2018-12-03 17:15:08,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-12-03 17:15:08,873 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 208 [2018-12-03 17:15:08,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:15:08,874 INFO L225 Difference]: With dead ends: 220 [2018-12-03 17:15:08,874 INFO L226 Difference]: Without dead ends: 218 [2018-12-03 17:15:08,875 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6972 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=7267, Invalid=8989, Unknown=0, NotChecked=0, Total=16256 [2018-12-03 17:15:08,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-12-03 17:15:08,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 214. [2018-12-03 17:15:08,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-12-03 17:15:08,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 298 transitions. [2018-12-03 17:15:08,880 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 298 transitions. Word has length 208 [2018-12-03 17:15:08,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:15:08,881 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 298 transitions. [2018-12-03 17:15:08,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-12-03 17:15:08,881 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 298 transitions. [2018-12-03 17:15:08,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-12-03 17:15:08,882 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:15:08,882 INFO L402 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1] [2018-12-03 17:15:08,882 INFO L423 AbstractCegarLoop]: === Iteration 44 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:15:08,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:15:08,882 INFO L82 PathProgramCache]: Analyzing trace with hash 970299968, now seen corresponding path program 42 times [2018-12-03 17:15:08,882 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:15:08,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:08,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:15:08,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:08,883 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:15:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:15:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:09,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:09,899 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:15:09,899 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:15:09,899 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:15:09,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:09,899 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:15:09,909 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:15:09,909 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:15:09,959 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:15:09,960 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:15:09,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:15:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:11,577 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:15:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:13,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:15:13,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 130 [2018-12-03 17:15:13,887 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:15:13,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-12-03 17:15:13,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-12-03 17:15:13,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7612, Invalid=9418, Unknown=0, NotChecked=0, Total=17030 [2018-12-03 17:15:13,889 INFO L87 Difference]: Start difference. First operand 214 states and 298 transitions. Second operand 88 states. [2018-12-03 17:15:14,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:15:14,363 INFO L93 Difference]: Finished difference Result 225 states and 313 transitions. [2018-12-03 17:15:14,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-12-03 17:15:14,363 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 213 [2018-12-03 17:15:14,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:15:14,364 INFO L225 Difference]: With dead ends: 225 [2018-12-03 17:15:14,364 INFO L226 Difference]: Without dead ends: 223 [2018-12-03 17:15:14,365 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7310 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=7612, Invalid=9418, Unknown=0, NotChecked=0, Total=17030 [2018-12-03 17:15:14,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-12-03 17:15:14,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2018-12-03 17:15:14,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-12-03 17:15:14,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 305 transitions. [2018-12-03 17:15:14,371 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 305 transitions. Word has length 213 [2018-12-03 17:15:14,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:15:14,371 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 305 transitions. [2018-12-03 17:15:14,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-12-03 17:15:14,371 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 305 transitions. [2018-12-03 17:15:14,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-12-03 17:15:14,372 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:15:14,372 INFO L402 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1] [2018-12-03 17:15:14,372 INFO L423 AbstractCegarLoop]: === Iteration 45 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:15:14,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:15:14,373 INFO L82 PathProgramCache]: Analyzing trace with hash 106759665, now seen corresponding path program 43 times [2018-12-03 17:15:14,373 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:15:14,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:14,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:15:14,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:14,374 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:15:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:15:15,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:15,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:15,413 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:15:15,414 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:15:15,414 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:15:15,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:15,414 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:15:15,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:15:15,423 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:15:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:15:15,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:15:17,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:17,016 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:15:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:19,637 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:15:19,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 133 [2018-12-03 17:15:19,637 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:15:19,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-12-03 17:15:19,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-12-03 17:15:19,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7965, Invalid=9857, Unknown=0, NotChecked=0, Total=17822 [2018-12-03 17:15:19,639 INFO L87 Difference]: Start difference. First operand 219 states and 305 transitions. Second operand 90 states. [2018-12-03 17:15:20,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:15:20,149 INFO L93 Difference]: Finished difference Result 230 states and 320 transitions. [2018-12-03 17:15:20,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-12-03 17:15:20,149 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 218 [2018-12-03 17:15:20,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:15:20,151 INFO L225 Difference]: With dead ends: 230 [2018-12-03 17:15:20,151 INFO L226 Difference]: Without dead ends: 228 [2018-12-03 17:15:20,152 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7656 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7965, Invalid=9857, Unknown=0, NotChecked=0, Total=17822 [2018-12-03 17:15:20,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-12-03 17:15:20,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2018-12-03 17:15:20,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-12-03 17:15:20,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 312 transitions. [2018-12-03 17:15:20,157 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 312 transitions. Word has length 218 [2018-12-03 17:15:20,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:15:20,157 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 312 transitions. [2018-12-03 17:15:20,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-12-03 17:15:20,157 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 312 transitions. [2018-12-03 17:15:20,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-12-03 17:15:20,158 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:15:20,158 INFO L402 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1] [2018-12-03 17:15:20,159 INFO L423 AbstractCegarLoop]: === Iteration 46 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:15:20,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:15:20,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1161150240, now seen corresponding path program 44 times [2018-12-03 17:15:20,159 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:15:20,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:20,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:15:20,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:20,160 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:15:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:15:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:21,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:21,231 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:15:21,231 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:15:21,231 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:15:21,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:21,231 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:15:21,240 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:15:21,240 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:15:21,331 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-12-03 17:15:21,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:15:21,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:15:22,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:22,943 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:15:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:25,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:15:25,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 136 [2018-12-03 17:15:25,604 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:15:25,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-12-03 17:15:25,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-12-03 17:15:25,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8326, Invalid=10306, Unknown=0, NotChecked=0, Total=18632 [2018-12-03 17:15:25,605 INFO L87 Difference]: Start difference. First operand 224 states and 312 transitions. Second operand 92 states. [2018-12-03 17:15:26,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:15:26,185 INFO L93 Difference]: Finished difference Result 235 states and 327 transitions. [2018-12-03 17:15:26,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-12-03 17:15:26,185 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 223 [2018-12-03 17:15:26,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:15:26,186 INFO L225 Difference]: With dead ends: 235 [2018-12-03 17:15:26,186 INFO L226 Difference]: Without dead ends: 233 [2018-12-03 17:15:26,187 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8010 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=8326, Invalid=10306, Unknown=0, NotChecked=0, Total=18632 [2018-12-03 17:15:26,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-12-03 17:15:26,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2018-12-03 17:15:26,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-12-03 17:15:26,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 319 transitions. [2018-12-03 17:15:26,192 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 319 transitions. Word has length 223 [2018-12-03 17:15:26,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:15:26,192 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 319 transitions. [2018-12-03 17:15:26,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-12-03 17:15:26,192 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 319 transitions. [2018-12-03 17:15:26,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-12-03 17:15:26,193 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:15:26,193 INFO L402 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1] [2018-12-03 17:15:26,193 INFO L423 AbstractCegarLoop]: === Iteration 47 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:15:26,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:15:26,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1399292753, now seen corresponding path program 45 times [2018-12-03 17:15:26,193 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:15:26,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:26,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:15:26,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:26,194 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:15:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:15:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:27,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:27,254 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:15:27,254 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:15:27,254 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:15:27,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:27,254 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:15:27,265 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:15:27,265 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:15:27,321 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:15:27,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:15:27,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:15:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:28,983 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:15:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:31,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:15:31,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 139 [2018-12-03 17:15:31,886 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:15:31,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-12-03 17:15:31,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-12-03 17:15:31,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8695, Invalid=10765, Unknown=0, NotChecked=0, Total=19460 [2018-12-03 17:15:31,888 INFO L87 Difference]: Start difference. First operand 229 states and 319 transitions. Second operand 94 states. [2018-12-03 17:15:32,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:15:32,540 INFO L93 Difference]: Finished difference Result 240 states and 334 transitions. [2018-12-03 17:15:32,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-12-03 17:15:32,540 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 228 [2018-12-03 17:15:32,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:15:32,541 INFO L225 Difference]: With dead ends: 240 [2018-12-03 17:15:32,541 INFO L226 Difference]: Without dead ends: 238 [2018-12-03 17:15:32,542 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8372 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=8695, Invalid=10765, Unknown=0, NotChecked=0, Total=19460 [2018-12-03 17:15:32,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-12-03 17:15:32,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2018-12-03 17:15:32,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-12-03 17:15:32,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 326 transitions. [2018-12-03 17:15:32,549 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 326 transitions. Word has length 228 [2018-12-03 17:15:32,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:15:32,550 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 326 transitions. [2018-12-03 17:15:32,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-12-03 17:15:32,550 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 326 transitions. [2018-12-03 17:15:32,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-12-03 17:15:32,551 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:15:32,551 INFO L402 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1] [2018-12-03 17:15:32,551 INFO L423 AbstractCegarLoop]: === Iteration 48 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:15:32,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:15:32,552 INFO L82 PathProgramCache]: Analyzing trace with hash -174645376, now seen corresponding path program 46 times [2018-12-03 17:15:32,552 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:15:32,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:32,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:15:32,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:32,553 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:15:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:15:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:34,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:34,158 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:15:34,158 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:15:34,159 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:15:34,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:34,159 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:15:34,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:15:34,167 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:15:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:15:34,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:15:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:36,378 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:15:39,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:39,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:15:39,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 142 [2018-12-03 17:15:39,159 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:15:39,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-12-03 17:15:39,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-12-03 17:15:39,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9072, Invalid=11234, Unknown=0, NotChecked=0, Total=20306 [2018-12-03 17:15:39,161 INFO L87 Difference]: Start difference. First operand 234 states and 326 transitions. Second operand 96 states. [2018-12-03 17:15:39,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:15:39,797 INFO L93 Difference]: Finished difference Result 245 states and 341 transitions. [2018-12-03 17:15:39,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-12-03 17:15:39,798 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 233 [2018-12-03 17:15:39,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:15:39,799 INFO L225 Difference]: With dead ends: 245 [2018-12-03 17:15:39,799 INFO L226 Difference]: Without dead ends: 243 [2018-12-03 17:15:39,800 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8742 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9072, Invalid=11234, Unknown=0, NotChecked=0, Total=20306 [2018-12-03 17:15:39,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-12-03 17:15:39,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2018-12-03 17:15:39,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-12-03 17:15:39,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 333 transitions. [2018-12-03 17:15:39,808 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 333 transitions. Word has length 233 [2018-12-03 17:15:39,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:15:39,808 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 333 transitions. [2018-12-03 17:15:39,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-12-03 17:15:39,808 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 333 transitions. [2018-12-03 17:15:39,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-12-03 17:15:39,809 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:15:39,810 INFO L402 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1] [2018-12-03 17:15:39,810 INFO L423 AbstractCegarLoop]: === Iteration 49 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:15:39,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:15:39,810 INFO L82 PathProgramCache]: Analyzing trace with hash -587413327, now seen corresponding path program 47 times [2018-12-03 17:15:39,810 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:15:39,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:39,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:15:39,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:39,811 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:15:39,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:15:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:40,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:40,924 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:15:40,924 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:15:40,924 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:15:40,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:40,924 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:15:40,932 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:15:40,932 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:15:41,038 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-12-03 17:15:41,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:15:41,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:15:42,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:42,876 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:15:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:46,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:15:46,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 145 [2018-12-03 17:15:46,015 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:15:46,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-12-03 17:15:46,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-12-03 17:15:46,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9457, Invalid=11713, Unknown=0, NotChecked=0, Total=21170 [2018-12-03 17:15:46,017 INFO L87 Difference]: Start difference. First operand 239 states and 333 transitions. Second operand 98 states. [2018-12-03 17:15:46,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:15:46,637 INFO L93 Difference]: Finished difference Result 250 states and 348 transitions. [2018-12-03 17:15:46,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-12-03 17:15:46,638 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 238 [2018-12-03 17:15:46,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:15:46,639 INFO L225 Difference]: With dead ends: 250 [2018-12-03 17:15:46,639 INFO L226 Difference]: Without dead ends: 248 [2018-12-03 17:15:46,640 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9120 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=9457, Invalid=11713, Unknown=0, NotChecked=0, Total=21170 [2018-12-03 17:15:46,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-12-03 17:15:46,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2018-12-03 17:15:46,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-12-03 17:15:46,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 340 transitions. [2018-12-03 17:15:46,645 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 340 transitions. Word has length 238 [2018-12-03 17:15:46,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:15:46,646 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 340 transitions. [2018-12-03 17:15:46,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-12-03 17:15:46,646 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 340 transitions. [2018-12-03 17:15:46,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-12-03 17:15:46,647 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:15:46,647 INFO L402 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1] [2018-12-03 17:15:46,647 INFO L423 AbstractCegarLoop]: === Iteration 50 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:15:46,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:15:46,647 INFO L82 PathProgramCache]: Analyzing trace with hash -2091502048, now seen corresponding path program 48 times [2018-12-03 17:15:46,647 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:15:46,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:46,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:15:46,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:46,648 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:15:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:15:47,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:47,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:47,781 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:15:47,781 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:15:47,782 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:15:47,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:47,782 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:15:47,790 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:15:47,791 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:15:47,848 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:15:47,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:15:47,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:15:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:49,742 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:15:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:52,958 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:15:52,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 148 [2018-12-03 17:15:52,959 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:15:52,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-12-03 17:15:52,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-12-03 17:15:52,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9850, Invalid=12202, Unknown=0, NotChecked=0, Total=22052 [2018-12-03 17:15:52,961 INFO L87 Difference]: Start difference. First operand 244 states and 340 transitions. Second operand 100 states. [2018-12-03 17:15:53,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:15:53,630 INFO L93 Difference]: Finished difference Result 255 states and 355 transitions. [2018-12-03 17:15:53,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-12-03 17:15:53,631 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 243 [2018-12-03 17:15:53,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:15:53,632 INFO L225 Difference]: With dead ends: 255 [2018-12-03 17:15:53,632 INFO L226 Difference]: Without dead ends: 253 [2018-12-03 17:15:53,633 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9506 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=9850, Invalid=12202, Unknown=0, NotChecked=0, Total=22052 [2018-12-03 17:15:53,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-12-03 17:15:53,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2018-12-03 17:15:53,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-12-03 17:15:53,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 347 transitions. [2018-12-03 17:15:53,638 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 347 transitions. Word has length 243 [2018-12-03 17:15:53,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:15:53,639 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 347 transitions. [2018-12-03 17:15:53,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-12-03 17:15:53,639 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 347 transitions. [2018-12-03 17:15:53,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-12-03 17:15:53,640 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:15:53,640 INFO L402 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1] [2018-12-03 17:15:53,640 INFO L423 AbstractCegarLoop]: === Iteration 51 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:15:53,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:15:53,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1438460399, now seen corresponding path program 49 times [2018-12-03 17:15:53,640 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:15:53,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:53,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:15:53,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:53,641 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:15:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:15:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:55,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:55,029 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:15:55,029 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:15:55,029 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:15:55,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:55,029 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:15:55,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:15:55,039 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:15:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:15:55,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:15:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:57,150 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:16:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:00,555 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:16:00,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 151 [2018-12-03 17:16:00,556 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:16:00,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-12-03 17:16:00,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-12-03 17:16:00,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10251, Invalid=12701, Unknown=0, NotChecked=0, Total=22952 [2018-12-03 17:16:00,558 INFO L87 Difference]: Start difference. First operand 249 states and 347 transitions. Second operand 102 states. [2018-12-03 17:16:01,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:16:01,587 INFO L93 Difference]: Finished difference Result 260 states and 362 transitions. [2018-12-03 17:16:01,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-12-03 17:16:01,588 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 248 [2018-12-03 17:16:01,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:16:01,589 INFO L225 Difference]: With dead ends: 260 [2018-12-03 17:16:01,590 INFO L226 Difference]: Without dead ends: 258 [2018-12-03 17:16:01,591 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9900 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=10251, Invalid=12701, Unknown=0, NotChecked=0, Total=22952 [2018-12-03 17:16:01,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-12-03 17:16:01,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 254. [2018-12-03 17:16:01,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-12-03 17:16:01,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 354 transitions. [2018-12-03 17:16:01,599 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 354 transitions. Word has length 248 [2018-12-03 17:16:01,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:16:01,603 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 354 transitions. [2018-12-03 17:16:01,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-12-03 17:16:01,604 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 354 transitions. [2018-12-03 17:16:01,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-12-03 17:16:01,607 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:16:01,607 INFO L402 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1] [2018-12-03 17:16:01,607 INFO L423 AbstractCegarLoop]: === Iteration 52 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:16:01,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:16:01,608 INFO L82 PathProgramCache]: Analyzing trace with hash -459176768, now seen corresponding path program 50 times [2018-12-03 17:16:01,608 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:16:01,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:16:01,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:16:01,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:16:01,609 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:16:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:16:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 0 proven. 6175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:02,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:02,865 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:16:02,865 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:16:02,865 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:16:02,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:02,865 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:16:02,874 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:16:02,874 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:16:02,984 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-12-03 17:16:02,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:16:02,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:16:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 0 proven. 6175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:04,994 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:16:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 0 proven. 6175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:08,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:16:08,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 154 [2018-12-03 17:16:08,411 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:16:08,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-12-03 17:16:08,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-12-03 17:16:08,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10660, Invalid=13210, Unknown=0, NotChecked=0, Total=23870 [2018-12-03 17:16:08,414 INFO L87 Difference]: Start difference. First operand 254 states and 354 transitions. Second operand 104 states. [2018-12-03 17:16:09,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:16:09,168 INFO L93 Difference]: Finished difference Result 265 states and 369 transitions. [2018-12-03 17:16:09,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-12-03 17:16:09,169 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 253 [2018-12-03 17:16:09,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:16:09,170 INFO L225 Difference]: With dead ends: 265 [2018-12-03 17:16:09,170 INFO L226 Difference]: Without dead ends: 263 [2018-12-03 17:16:09,171 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10302 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=10660, Invalid=13210, Unknown=0, NotChecked=0, Total=23870 [2018-12-03 17:16:09,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-12-03 17:16:09,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 259. [2018-12-03 17:16:09,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-12-03 17:16:09,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 361 transitions. [2018-12-03 17:16:09,178 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 361 transitions. Word has length 253 [2018-12-03 17:16:09,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:16:09,179 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 361 transitions. [2018-12-03 17:16:09,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-12-03 17:16:09,179 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 361 transitions. [2018-12-03 17:16:09,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-12-03 17:16:09,180 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:16:09,180 INFO L402 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1] [2018-12-03 17:16:09,181 INFO L423 AbstractCegarLoop]: === Iteration 53 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:16:09,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:16:09,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1965053071, now seen corresponding path program 51 times [2018-12-03 17:16:09,181 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:16:09,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:16:09,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:16:09,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:16:09,182 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:16:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:16:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 0 proven. 6426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:10,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:10,783 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:16:10,783 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:16:10,783 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:16:10,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:10,783 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:16:10,793 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:16:10,793 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:16:10,855 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:16:10,856 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:16:10,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:16:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 0 proven. 6426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:13,027 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:16:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 0 proven. 6426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:16,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:16:16,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 157 [2018-12-03 17:16:16,612 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:16:16,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-12-03 17:16:16,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-12-03 17:16:16,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11077, Invalid=13729, Unknown=0, NotChecked=0, Total=24806 [2018-12-03 17:16:16,614 INFO L87 Difference]: Start difference. First operand 259 states and 361 transitions. Second operand 106 states. [2018-12-03 17:16:17,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:16:17,412 INFO L93 Difference]: Finished difference Result 270 states and 376 transitions. [2018-12-03 17:16:17,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-12-03 17:16:17,416 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 258 [2018-12-03 17:16:17,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:16:17,417 INFO L225 Difference]: With dead ends: 270 [2018-12-03 17:16:17,417 INFO L226 Difference]: Without dead ends: 268 [2018-12-03 17:16:17,418 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10712 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=11077, Invalid=13729, Unknown=0, NotChecked=0, Total=24806 [2018-12-03 17:16:17,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-12-03 17:16:17,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2018-12-03 17:16:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-12-03 17:16:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 368 transitions. [2018-12-03 17:16:17,424 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 368 transitions. Word has length 258 [2018-12-03 17:16:17,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:16:17,425 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 368 transitions. [2018-12-03 17:16:17,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-12-03 17:16:17,425 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 368 transitions. [2018-12-03 17:16:17,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-12-03 17:16:17,426 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:16:17,426 INFO L402 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1] [2018-12-03 17:16:17,427 INFO L423 AbstractCegarLoop]: === Iteration 54 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:16:17,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:16:17,427 INFO L82 PathProgramCache]: Analyzing trace with hash 563284832, now seen corresponding path program 52 times [2018-12-03 17:16:17,427 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:16:17,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:16:17,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:16:17,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:16:17,428 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:16:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:16:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 0 proven. 6682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:18,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:18,779 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:16:18,780 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:16:18,780 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:16:18,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:18,780 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:16:18,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:16:18,788 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:16:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:16:18,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:16:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 0 proven. 6682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:21,297 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:16:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 0 proven. 6682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:24,707 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:16:24,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 160 [2018-12-03 17:16:24,707 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:16:24,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-12-03 17:16:24,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-12-03 17:16:24,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11502, Invalid=14258, Unknown=0, NotChecked=0, Total=25760 [2018-12-03 17:16:24,709 INFO L87 Difference]: Start difference. First operand 264 states and 368 transitions. Second operand 108 states. [2018-12-03 17:16:25,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:16:25,515 INFO L93 Difference]: Finished difference Result 275 states and 383 transitions. [2018-12-03 17:16:25,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-12-03 17:16:25,516 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 263 [2018-12-03 17:16:25,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:16:25,517 INFO L225 Difference]: With dead ends: 275 [2018-12-03 17:16:25,517 INFO L226 Difference]: Without dead ends: 273 [2018-12-03 17:16:25,518 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11130 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=11502, Invalid=14258, Unknown=0, NotChecked=0, Total=25760 [2018-12-03 17:16:25,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-12-03 17:16:25,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 269. [2018-12-03 17:16:25,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-12-03 17:16:25,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 375 transitions. [2018-12-03 17:16:25,523 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 375 transitions. Word has length 263 [2018-12-03 17:16:25,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:16:25,523 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 375 transitions. [2018-12-03 17:16:25,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-12-03 17:16:25,524 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 375 transitions. [2018-12-03 17:16:25,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-12-03 17:16:25,524 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:16:25,525 INFO L402 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1] [2018-12-03 17:16:25,525 INFO L423 AbstractCegarLoop]: === Iteration 55 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:16:25,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:16:25,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1996048593, now seen corresponding path program 53 times [2018-12-03 17:16:25,525 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:16:25,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:16:25,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:16:25,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:16:25,526 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:16:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:16:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 0 proven. 6943 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:27,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:27,048 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:16:27,048 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:16:27,048 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:16:27,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:27,048 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:16:27,063 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:16:27,064 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:16:27,191 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-12-03 17:16:27,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:16:27,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:16:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 0 proven. 6943 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:29,420 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:16:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 0 proven. 6943 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:33,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:16:33,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 163 [2018-12-03 17:16:33,215 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:16:33,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-12-03 17:16:33,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-12-03 17:16:33,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11935, Invalid=14797, Unknown=0, NotChecked=0, Total=26732 [2018-12-03 17:16:33,217 INFO L87 Difference]: Start difference. First operand 269 states and 375 transitions. Second operand 110 states. [2018-12-03 17:16:34,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:16:34,154 INFO L93 Difference]: Finished difference Result 280 states and 390 transitions. [2018-12-03 17:16:34,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-12-03 17:16:34,154 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 268 [2018-12-03 17:16:34,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:16:34,156 INFO L225 Difference]: With dead ends: 280 [2018-12-03 17:16:34,156 INFO L226 Difference]: Without dead ends: 278 [2018-12-03 17:16:34,157 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11556 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=11935, Invalid=14797, Unknown=0, NotChecked=0, Total=26732 [2018-12-03 17:16:34,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-12-03 17:16:34,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 274. [2018-12-03 17:16:34,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-12-03 17:16:34,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 382 transitions. [2018-12-03 17:16:34,164 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 382 transitions. Word has length 268 [2018-12-03 17:16:34,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:16:34,165 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 382 transitions. [2018-12-03 17:16:34,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-12-03 17:16:34,165 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 382 transitions. [2018-12-03 17:16:34,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-12-03 17:16:34,166 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:16:34,166 INFO L402 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1] [2018-12-03 17:16:34,167 INFO L423 AbstractCegarLoop]: === Iteration 56 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:16:34,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:16:34,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1774504448, now seen corresponding path program 54 times [2018-12-03 17:16:34,167 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:16:34,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:16:34,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:16:34,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:16:34,168 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:16:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:16:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 0 proven. 7209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:35,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:35,603 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:16:35,603 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:16:35,604 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:16:35,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:35,604 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:16:35,612 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:16:35,612 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:16:35,677 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:16:35,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:16:35,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:16:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 0 proven. 7209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:38,220 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:16:42,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 0 proven. 7209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:42,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:16:42,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 166 [2018-12-03 17:16:42,075 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:16:42,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-12-03 17:16:42,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-12-03 17:16:42,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12376, Invalid=15346, Unknown=0, NotChecked=0, Total=27722 [2018-12-03 17:16:42,077 INFO L87 Difference]: Start difference. First operand 274 states and 382 transitions. Second operand 112 states. [2018-12-03 17:16:43,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:16:43,167 INFO L93 Difference]: Finished difference Result 285 states and 397 transitions. [2018-12-03 17:16:43,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-12-03 17:16:43,167 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 273 [2018-12-03 17:16:43,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:16:43,168 INFO L225 Difference]: With dead ends: 285 [2018-12-03 17:16:43,168 INFO L226 Difference]: Without dead ends: 283 [2018-12-03 17:16:43,169 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11990 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=12376, Invalid=15346, Unknown=0, NotChecked=0, Total=27722 [2018-12-03 17:16:43,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-12-03 17:16:43,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 279. [2018-12-03 17:16:43,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-12-03 17:16:43,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 389 transitions. [2018-12-03 17:16:43,178 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 389 transitions. Word has length 273 [2018-12-03 17:16:43,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:16:43,178 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 389 transitions. [2018-12-03 17:16:43,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-12-03 17:16:43,178 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 389 transitions. [2018-12-03 17:16:43,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-12-03 17:16:43,179 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:16:43,180 INFO L402 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1] [2018-12-03 17:16:43,180 INFO L423 AbstractCegarLoop]: === Iteration 57 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:16:43,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:16:43,180 INFO L82 PathProgramCache]: Analyzing trace with hash -281694671, now seen corresponding path program 55 times [2018-12-03 17:16:43,180 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:16:43,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:16:43,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:16:43,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:16:43,181 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:16:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:16:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7480 backedges. 0 proven. 7480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:44,653 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:44,653 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:16:44,653 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:16:44,653 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:16:44,653 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:44,653 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:16:44,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:16:44,671 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:16:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:16:44,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:16:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7480 backedges. 0 proven. 7480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:47,337 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:16:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7480 backedges. 0 proven. 7480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:51,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:16:51,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 169 [2018-12-03 17:16:51,101 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:16:51,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-12-03 17:16:51,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-12-03 17:16:51,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12825, Invalid=15905, Unknown=0, NotChecked=0, Total=28730 [2018-12-03 17:16:51,103 INFO L87 Difference]: Start difference. First operand 279 states and 389 transitions. Second operand 114 states. [2018-12-03 17:16:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:16:51,973 INFO L93 Difference]: Finished difference Result 290 states and 404 transitions. [2018-12-03 17:16:51,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-12-03 17:16:51,974 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 278 [2018-12-03 17:16:51,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:16:51,975 INFO L225 Difference]: With dead ends: 290 [2018-12-03 17:16:51,975 INFO L226 Difference]: Without dead ends: 288 [2018-12-03 17:16:51,976 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12432 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=12825, Invalid=15905, Unknown=0, NotChecked=0, Total=28730 [2018-12-03 17:16:51,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-12-03 17:16:51,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 284. [2018-12-03 17:16:51,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-12-03 17:16:51,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 396 transitions. [2018-12-03 17:16:51,981 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 396 transitions. Word has length 278 [2018-12-03 17:16:51,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:16:51,981 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 396 transitions. [2018-12-03 17:16:51,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-12-03 17:16:51,981 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 396 transitions. [2018-12-03 17:16:51,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-12-03 17:16:51,982 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:16:51,982 INFO L402 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1] [2018-12-03 17:16:51,982 INFO L423 AbstractCegarLoop]: === Iteration 58 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:16:51,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:16:51,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1269776224, now seen corresponding path program 56 times [2018-12-03 17:16:51,983 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:16:51,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:16:51,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:16:51,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:16:51,984 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:16:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:16:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 0 proven. 7756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:53,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:53,509 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:16:53,509 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:16:53,509 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:16:53,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:53,510 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:16:53,519 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:16:53,519 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:16:53,664 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-12-03 17:16:53,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:16:53,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:16:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 0 proven. 7756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:56,120 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:17:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 0 proven. 7756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:00,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:17:00,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 170 [2018-12-03 17:17:00,328 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:17:00,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-12-03 17:17:00,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-12-03 17:17:00,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12939, Invalid=16131, Unknown=0, NotChecked=0, Total=29070 [2018-12-03 17:17:00,330 INFO L87 Difference]: Start difference. First operand 284 states and 396 transitions. Second operand 116 states. [2018-12-03 17:17:01,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:17:01,328 INFO L93 Difference]: Finished difference Result 295 states and 411 transitions. [2018-12-03 17:17:01,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-12-03 17:17:01,329 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 283 [2018-12-03 17:17:01,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:17:01,330 INFO L225 Difference]: With dead ends: 295 [2018-12-03 17:17:01,330 INFO L226 Difference]: Without dead ends: 293 [2018-12-03 17:17:01,330 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 451 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12989 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=12939, Invalid=16131, Unknown=0, NotChecked=0, Total=29070 [2018-12-03 17:17:01,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-12-03 17:17:01,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 289. [2018-12-03 17:17:01,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-12-03 17:17:01,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 403 transitions. [2018-12-03 17:17:01,335 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 403 transitions. Word has length 283 [2018-12-03 17:17:01,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:17:01,336 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 403 transitions. [2018-12-03 17:17:01,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-12-03 17:17:01,336 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 403 transitions. [2018-12-03 17:17:01,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-12-03 17:17:01,337 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:17:01,337 INFO L402 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1] [2018-12-03 17:17:01,337 INFO L423 AbstractCegarLoop]: === Iteration 59 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:17:01,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:17:01,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1555749777, now seen corresponding path program 57 times [2018-12-03 17:17:01,337 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:17:01,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:17:01,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:17:01,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:17:01,338 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:17:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:17:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8037 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:03,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:17:03,611 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:17:03,611 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:17:03,611 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:17:03,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:17:03,612 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:17:03,622 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:17:03,622 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:17:03,691 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:17:03,691 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:17:03,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:17:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8037 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:06,270 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:17:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8037 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:10,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:17:10,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 171 [2018-12-03 17:17:10,435 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:17:10,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-12-03 17:17:10,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-12-03 17:17:10,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13053, Invalid=16359, Unknown=0, NotChecked=0, Total=29412 [2018-12-03 17:17:10,437 INFO L87 Difference]: Start difference. First operand 289 states and 403 transitions. Second operand 118 states. [2018-12-03 17:17:11,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:17:11,512 INFO L93 Difference]: Finished difference Result 300 states and 418 transitions. [2018-12-03 17:17:11,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-12-03 17:17:11,512 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 288 [2018-12-03 17:17:11,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:17:11,513 INFO L225 Difference]: With dead ends: 300 [2018-12-03 17:17:11,514 INFO L226 Difference]: Without dead ends: 298 [2018-12-03 17:17:11,514 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 459 SyntacticMatches, 4 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13546 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=13053, Invalid=16359, Unknown=0, NotChecked=0, Total=29412 [2018-12-03 17:17:11,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-12-03 17:17:11,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2018-12-03 17:17:11,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-12-03 17:17:11,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 410 transitions. [2018-12-03 17:17:11,522 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 410 transitions. Word has length 288 [2018-12-03 17:17:11,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:17:11,523 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 410 transitions. [2018-12-03 17:17:11,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-12-03 17:17:11,523 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 410 transitions. [2018-12-03 17:17:11,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-12-03 17:17:11,524 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:17:11,525 INFO L402 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1] [2018-12-03 17:17:11,525 INFO L423 AbstractCegarLoop]: === Iteration 60 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:17:11,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:17:11,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1607528256, now seen corresponding path program 58 times [2018-12-03 17:17:11,525 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:17:11,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:17:11,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:17:11,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:17:11,526 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:17:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:17:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8323 backedges. 0 proven. 8323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:13,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:17:13,365 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:17:13,365 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:17:13,365 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:17:13,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:17:13,365 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:17:13,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:17:13,376 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:17:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:17:13,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:17:16,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8323 backedges. 0 proven. 8323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:16,224 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:17:20,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8323 backedges. 0 proven. 8323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:20,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:17:20,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 172 [2018-12-03 17:17:20,431 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:17:20,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-12-03 17:17:20,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-12-03 17:17:20,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13167, Invalid=16589, Unknown=0, NotChecked=0, Total=29756 [2018-12-03 17:17:20,433 INFO L87 Difference]: Start difference. First operand 294 states and 410 transitions. Second operand 120 states. [2018-12-03 17:17:21,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:17:21,459 INFO L93 Difference]: Finished difference Result 305 states and 425 transitions. [2018-12-03 17:17:21,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-12-03 17:17:21,460 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 293 [2018-12-03 17:17:21,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:17:21,461 INFO L225 Difference]: With dead ends: 305 [2018-12-03 17:17:21,461 INFO L226 Difference]: Without dead ends: 303 [2018-12-03 17:17:21,462 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 467 SyntacticMatches, 6 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14103 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=13167, Invalid=16589, Unknown=0, NotChecked=0, Total=29756 [2018-12-03 17:17:21,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-12-03 17:17:21,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 299. [2018-12-03 17:17:21,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-12-03 17:17:21,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 417 transitions. [2018-12-03 17:17:21,470 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 417 transitions. Word has length 293 [2018-12-03 17:17:21,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:17:21,470 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 417 transitions. [2018-12-03 17:17:21,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-12-03 17:17:21,470 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 417 transitions. [2018-12-03 17:17:21,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-12-03 17:17:21,472 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:17:21,472 INFO L402 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1] [2018-12-03 17:17:21,472 INFO L423 AbstractCegarLoop]: === Iteration 61 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:17:21,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:17:21,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1898893553, now seen corresponding path program 59 times [2018-12-03 17:17:21,472 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:17:21,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:17:21,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:17:21,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:17:21,473 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:17:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:17:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8614 backedges. 0 proven. 8614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:23,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:17:23,420 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:17:23,420 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:17:23,421 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:17:23,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:17:23,421 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:17:23,430 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:17:23,430 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:17:23,568 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-12-03 17:17:23,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:17:23,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:17:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8614 backedges. 0 proven. 8614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:26,264 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:17:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8614 backedges. 0 proven. 8614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:30,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:17:30,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 173 [2018-12-03 17:17:30,569 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:17:30,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-12-03 17:17:30,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-12-03 17:17:30,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13281, Invalid=16821, Unknown=0, NotChecked=0, Total=30102 [2018-12-03 17:17:30,572 INFO L87 Difference]: Start difference. First operand 299 states and 417 transitions. Second operand 122 states. [2018-12-03 17:17:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:17:31,639 INFO L93 Difference]: Finished difference Result 310 states and 432 transitions. [2018-12-03 17:17:31,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-12-03 17:17:31,640 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 298 [2018-12-03 17:17:31,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:17:31,641 INFO L225 Difference]: With dead ends: 310 [2018-12-03 17:17:31,641 INFO L226 Difference]: Without dead ends: 308 [2018-12-03 17:17:31,642 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 475 SyntacticMatches, 8 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14660 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=13281, Invalid=16821, Unknown=0, NotChecked=0, Total=30102 [2018-12-03 17:17:31,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-12-03 17:17:31,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 304. [2018-12-03 17:17:31,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-12-03 17:17:31,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 424 transitions. [2018-12-03 17:17:31,650 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 424 transitions. Word has length 298 [2018-12-03 17:17:31,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:17:31,650 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 424 transitions. [2018-12-03 17:17:31,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-12-03 17:17:31,650 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 424 transitions. [2018-12-03 17:17:31,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-12-03 17:17:31,651 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:17:31,652 INFO L402 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 1, 1, 1] [2018-12-03 17:17:31,652 INFO L423 AbstractCegarLoop]: === Iteration 62 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:17:31,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:17:31,652 INFO L82 PathProgramCache]: Analyzing trace with hash -765504032, now seen corresponding path program 60 times [2018-12-03 17:17:31,652 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:17:31,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:17:31,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:17:31,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:17:31,653 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:17:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:17:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8910 backedges. 0 proven. 8910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:33,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:17:33,635 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:17:33,635 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:17:33,635 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:17:33,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:17:33,635 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:17:33,645 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:17:33,646 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:17:33,719 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:17:33,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:17:33,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:17:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8910 backedges. 0 proven. 8910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:36,536 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:17:40,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8910 backedges. 0 proven. 8910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:40,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:17:40,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 174 [2018-12-03 17:17:40,822 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:17:40,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-12-03 17:17:40,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-12-03 17:17:40,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13395, Invalid=17055, Unknown=0, NotChecked=0, Total=30450 [2018-12-03 17:17:40,825 INFO L87 Difference]: Start difference. First operand 304 states and 424 transitions. Second operand 124 states. [2018-12-03 17:17:42,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:17:42,008 INFO L93 Difference]: Finished difference Result 315 states and 439 transitions. [2018-12-03 17:17:42,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-12-03 17:17:42,008 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 303 [2018-12-03 17:17:42,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:17:42,009 INFO L225 Difference]: With dead ends: 315 [2018-12-03 17:17:42,010 INFO L226 Difference]: Without dead ends: 313 [2018-12-03 17:17:42,010 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 483 SyntacticMatches, 10 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15217 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=13395, Invalid=17055, Unknown=0, NotChecked=0, Total=30450 [2018-12-03 17:17:42,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-12-03 17:17:42,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 309. [2018-12-03 17:17:42,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-12-03 17:17:42,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 431 transitions. [2018-12-03 17:17:42,017 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 431 transitions. Word has length 303 [2018-12-03 17:17:42,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:17:42,017 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 431 transitions. [2018-12-03 17:17:42,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-12-03 17:17:42,017 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 431 transitions. [2018-12-03 17:17:42,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-12-03 17:17:42,019 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:17:42,019 INFO L402 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 1, 1, 1] [2018-12-03 17:17:42,019 INFO L423 AbstractCegarLoop]: === Iteration 63 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:17:42,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:17:42,019 INFO L82 PathProgramCache]: Analyzing trace with hash -2034790831, now seen corresponding path program 61 times [2018-12-03 17:17:42,020 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:17:42,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:17:42,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:17:42,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:17:42,020 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:17:42,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:17:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9211 backedges. 0 proven. 9211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:44,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:17:44,064 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:17:44,064 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:17:44,064 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:17:44,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:17:44,064 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:17:44,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:17:44,074 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:17:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:17:44,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:17:47,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9211 backedges. 0 proven. 9211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:47,116 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:17:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9211 backedges. 0 proven. 9211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:51,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:17:51,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 175 [2018-12-03 17:17:51,424 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:17:51,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-12-03 17:17:51,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-12-03 17:17:51,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13509, Invalid=17291, Unknown=0, NotChecked=0, Total=30800 [2018-12-03 17:17:51,427 INFO L87 Difference]: Start difference. First operand 309 states and 431 transitions. Second operand 126 states. [2018-12-03 17:17:52,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:17:52,598 INFO L93 Difference]: Finished difference Result 320 states and 446 transitions. [2018-12-03 17:17:52,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-12-03 17:17:52,598 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 308 [2018-12-03 17:17:52,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:17:52,599 INFO L225 Difference]: With dead ends: 320 [2018-12-03 17:17:52,600 INFO L226 Difference]: Without dead ends: 318 [2018-12-03 17:17:52,600 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 491 SyntacticMatches, 12 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15774 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=13509, Invalid=17291, Unknown=0, NotChecked=0, Total=30800 [2018-12-03 17:17:52,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-12-03 17:17:52,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 314. [2018-12-03 17:17:52,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-12-03 17:17:52,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 438 transitions. [2018-12-03 17:17:52,609 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 438 transitions. Word has length 308 [2018-12-03 17:17:52,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:17:52,609 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 438 transitions. [2018-12-03 17:17:52,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-12-03 17:17:52,610 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 438 transitions. [2018-12-03 17:17:52,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-12-03 17:17:52,611 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:17:52,611 INFO L402 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1] [2018-12-03 17:17:52,612 INFO L423 AbstractCegarLoop]: === Iteration 64 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:17:52,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:17:52,612 INFO L82 PathProgramCache]: Analyzing trace with hash 429257856, now seen corresponding path program 62 times [2018-12-03 17:17:52,612 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:17:52,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:17:52,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:17:52,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:17:52,613 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:17:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:17:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:54,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:17:54,539 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:17:54,539 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:17:54,539 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:17:54,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:17:54,539 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:17:54,548 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:17:54,548 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:17:54,692 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-12-03 17:17:54,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:17:54,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:17:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:57,632 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:18:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:02,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:18:02,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 176 [2018-12-03 17:18:02,091 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:18:02,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-12-03 17:18:02,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-12-03 17:18:02,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13623, Invalid=17529, Unknown=0, NotChecked=0, Total=31152 [2018-12-03 17:18:02,094 INFO L87 Difference]: Start difference. First operand 314 states and 438 transitions. Second operand 128 states. [2018-12-03 17:18:03,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:18:03,274 INFO L93 Difference]: Finished difference Result 325 states and 453 transitions. [2018-12-03 17:18:03,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-12-03 17:18:03,274 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 313 [2018-12-03 17:18:03,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:18:03,276 INFO L225 Difference]: With dead ends: 325 [2018-12-03 17:18:03,276 INFO L226 Difference]: Without dead ends: 323 [2018-12-03 17:18:03,277 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 499 SyntacticMatches, 14 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16331 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=13623, Invalid=17529, Unknown=0, NotChecked=0, Total=31152 [2018-12-03 17:18:03,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-12-03 17:18:03,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 319. [2018-12-03 17:18:03,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-03 17:18:03,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 445 transitions. [2018-12-03 17:18:03,283 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 445 transitions. Word has length 313 [2018-12-03 17:18:03,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:18:03,283 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 445 transitions. [2018-12-03 17:18:03,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-12-03 17:18:03,283 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 445 transitions. [2018-12-03 17:18:03,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-12-03 17:18:03,285 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:18:03,285 INFO L402 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1] [2018-12-03 17:18:03,285 INFO L423 AbstractCegarLoop]: === Iteration 65 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:18:03,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:18:03,285 INFO L82 PathProgramCache]: Analyzing trace with hash -322639, now seen corresponding path program 63 times [2018-12-03 17:18:03,285 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:18:03,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:18:03,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:18:03,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:18:03,286 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:18:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:18:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:05,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:18:05,108 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:18:05,108 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:18:05,108 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:18:05,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:18:05,108 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:18:05,119 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:18:05,119 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:18:05,193 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:18:05,193 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:18:05,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:18:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:08,267 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:18:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:12,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:18:12,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 177 [2018-12-03 17:18:12,523 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:18:12,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-12-03 17:18:12,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-12-03 17:18:12,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13737, Invalid=17769, Unknown=0, NotChecked=0, Total=31506 [2018-12-03 17:18:12,526 INFO L87 Difference]: Start difference. First operand 319 states and 445 transitions. Second operand 130 states. [2018-12-03 17:18:13,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:18:13,728 INFO L93 Difference]: Finished difference Result 330 states and 460 transitions. [2018-12-03 17:18:13,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-12-03 17:18:13,728 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 318 [2018-12-03 17:18:13,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:18:13,729 INFO L225 Difference]: With dead ends: 330 [2018-12-03 17:18:13,730 INFO L226 Difference]: Without dead ends: 328 [2018-12-03 17:18:13,730 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 507 SyntacticMatches, 16 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16888 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=13737, Invalid=17769, Unknown=0, NotChecked=0, Total=31506 [2018-12-03 17:18:13,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-12-03 17:18:13,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2018-12-03 17:18:13,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2018-12-03 17:18:13,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 452 transitions. [2018-12-03 17:18:13,736 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 452 transitions. Word has length 318 [2018-12-03 17:18:13,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:18:13,737 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 452 transitions. [2018-12-03 17:18:13,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-12-03 17:18:13,737 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 452 transitions. [2018-12-03 17:18:13,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2018-12-03 17:18:13,738 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:18:13,738 INFO L402 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 1, 1, 1] [2018-12-03 17:18:13,739 INFO L423 AbstractCegarLoop]: === Iteration 66 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:18:13,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:18:13,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1970353376, now seen corresponding path program 64 times [2018-12-03 17:18:13,739 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:18:13,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:18:13,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:18:13,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:18:13,740 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:18:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:18:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 0 proven. 10144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:15,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:18:15,625 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:18:15,626 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:18:15,626 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:18:15,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:18:15,626 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:18:15,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:18:15,635 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:18:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:18:15,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:18:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 0 proven. 10144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:19,009 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:18:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 0 proven. 10144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:23,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:18:23,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 178 [2018-12-03 17:18:23,312 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:18:23,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-12-03 17:18:23,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-12-03 17:18:23,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13851, Invalid=18011, Unknown=0, NotChecked=0, Total=31862 [2018-12-03 17:18:23,315 INFO L87 Difference]: Start difference. First operand 324 states and 452 transitions. Second operand 132 states. [2018-12-03 17:18:24,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:18:24,585 INFO L93 Difference]: Finished difference Result 335 states and 467 transitions. [2018-12-03 17:18:24,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-12-03 17:18:24,585 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 323 [2018-12-03 17:18:24,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:18:24,587 INFO L225 Difference]: With dead ends: 335 [2018-12-03 17:18:24,587 INFO L226 Difference]: Without dead ends: 333 [2018-12-03 17:18:24,588 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 515 SyntacticMatches, 18 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17445 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=13851, Invalid=18011, Unknown=0, NotChecked=0, Total=31862 [2018-12-03 17:18:24,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2018-12-03 17:18:24,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 329. [2018-12-03 17:18:24,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-12-03 17:18:24,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 459 transitions. [2018-12-03 17:18:24,595 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 459 transitions. Word has length 323 [2018-12-03 17:18:24,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:18:24,595 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 459 transitions. [2018-12-03 17:18:24,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-12-03 17:18:24,595 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 459 transitions. [2018-12-03 17:18:24,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-12-03 17:18:24,597 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:18:24,597 INFO L402 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 1, 1, 1] [2018-12-03 17:18:24,597 INFO L423 AbstractCegarLoop]: === Iteration 67 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:18:24,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:18:24,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1474338543, now seen corresponding path program 65 times [2018-12-03 17:18:24,597 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:18:24,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:18:24,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:18:24,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:18:24,598 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:18:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:18:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10465 backedges. 0 proven. 10465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:26,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:18:26,619 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:18:26,619 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:18:26,620 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:18:26,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:18:26,620 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:18:26,635 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:18:26,635 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:18:26,788 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-12-03 17:18:26,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:18:26,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:18:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10465 backedges. 0 proven. 10465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:30,375 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:18:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10465 backedges. 0 proven. 10465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:34,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:18:34,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 179 [2018-12-03 17:18:34,933 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:18:34,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-12-03 17:18:34,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-12-03 17:18:34,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13965, Invalid=18255, Unknown=0, NotChecked=0, Total=32220 [2018-12-03 17:18:34,935 INFO L87 Difference]: Start difference. First operand 329 states and 459 transitions. Second operand 134 states. [2018-12-03 17:18:36,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:18:36,280 INFO L93 Difference]: Finished difference Result 340 states and 474 transitions. [2018-12-03 17:18:36,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-12-03 17:18:36,280 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 328 [2018-12-03 17:18:36,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:18:36,282 INFO L225 Difference]: With dead ends: 340 [2018-12-03 17:18:36,282 INFO L226 Difference]: Without dead ends: 338 [2018-12-03 17:18:36,283 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 721 GetRequests, 523 SyntacticMatches, 20 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18002 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=13965, Invalid=18255, Unknown=0, NotChecked=0, Total=32220 [2018-12-03 17:18:36,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-12-03 17:18:36,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 334. [2018-12-03 17:18:36,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2018-12-03 17:18:36,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 466 transitions. [2018-12-03 17:18:36,289 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 466 transitions. Word has length 328 [2018-12-03 17:18:36,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:18:36,289 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 466 transitions. [2018-12-03 17:18:36,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-12-03 17:18:36,289 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 466 transitions. [2018-12-03 17:18:36,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-12-03 17:18:36,290 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:18:36,291 INFO L402 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 1, 1, 1] [2018-12-03 17:18:36,291 INFO L423 AbstractCegarLoop]: === Iteration 68 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:18:36,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:18:36,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1642322368, now seen corresponding path program 66 times [2018-12-03 17:18:36,291 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:18:36,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:18:36,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:18:36,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:18:36,292 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:18:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:18:38,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 10791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:38,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:18:38,296 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:18:38,296 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:18:38,296 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:18:38,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:18:38,297 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:18:38,304 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:18:38,304 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:18:38,385 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:18:38,385 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:18:38,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:18:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 10791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:41,855 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:18:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 10791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:46,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:18:46,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 180 [2018-12-03 17:18:46,412 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:18:46,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-12-03 17:18:46,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-12-03 17:18:46,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14079, Invalid=18501, Unknown=0, NotChecked=0, Total=32580 [2018-12-03 17:18:46,414 INFO L87 Difference]: Start difference. First operand 334 states and 466 transitions. Second operand 136 states. [2018-12-03 17:18:47,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:18:47,830 INFO L93 Difference]: Finished difference Result 345 states and 481 transitions. [2018-12-03 17:18:47,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-12-03 17:18:47,830 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 333 [2018-12-03 17:18:47,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:18:47,831 INFO L225 Difference]: With dead ends: 345 [2018-12-03 17:18:47,832 INFO L226 Difference]: Without dead ends: 343 [2018-12-03 17:18:47,832 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 531 SyntacticMatches, 22 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18559 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=14079, Invalid=18501, Unknown=0, NotChecked=0, Total=32580 [2018-12-03 17:18:47,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-12-03 17:18:47,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 339. [2018-12-03 17:18:47,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-12-03 17:18:47,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 473 transitions. [2018-12-03 17:18:47,839 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 473 transitions. Word has length 333 [2018-12-03 17:18:47,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:18:47,839 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 473 transitions. [2018-12-03 17:18:47,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-12-03 17:18:47,839 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 473 transitions. [2018-12-03 17:18:47,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-12-03 17:18:47,840 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:18:47,840 INFO L402 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 1, 1, 1] [2018-12-03 17:18:47,841 INFO L423 AbstractCegarLoop]: === Iteration 69 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:18:47,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:18:47,841 INFO L82 PathProgramCache]: Analyzing trace with hash 315258481, now seen corresponding path program 67 times [2018-12-03 17:18:47,841 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:18:47,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:18:47,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:18:47,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:18:47,842 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:18:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:18:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11122 backedges. 0 proven. 11122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:50,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:18:50,220 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:18:50,220 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:18:50,220 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:18:50,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:18:50,220 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:18:50,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:18:50,228 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:18:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:18:50,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:18:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11122 backedges. 0 proven. 11122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:53,726 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:18:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11122 backedges. 0 proven. 11122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:58,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:18:58,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 181 [2018-12-03 17:18:58,368 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:18:58,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-12-03 17:18:58,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-12-03 17:18:58,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14193, Invalid=18749, Unknown=0, NotChecked=0, Total=32942 [2018-12-03 17:18:58,371 INFO L87 Difference]: Start difference. First operand 339 states and 473 transitions. Second operand 138 states. [2018-12-03 17:18:59,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:18:59,706 INFO L93 Difference]: Finished difference Result 350 states and 488 transitions. [2018-12-03 17:18:59,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-12-03 17:18:59,706 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 338 [2018-12-03 17:18:59,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:18:59,708 INFO L225 Difference]: With dead ends: 350 [2018-12-03 17:18:59,708 INFO L226 Difference]: Without dead ends: 348 [2018-12-03 17:18:59,708 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 539 SyntacticMatches, 24 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19116 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=14193, Invalid=18749, Unknown=0, NotChecked=0, Total=32942 [2018-12-03 17:18:59,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2018-12-03 17:18:59,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2018-12-03 17:18:59,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2018-12-03 17:18:59,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 480 transitions. [2018-12-03 17:18:59,714 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 480 transitions. Word has length 338 [2018-12-03 17:18:59,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:18:59,714 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 480 transitions. [2018-12-03 17:18:59,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-12-03 17:18:59,715 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 480 transitions. [2018-12-03 17:18:59,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2018-12-03 17:18:59,716 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:18:59,716 INFO L402 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 1, 1, 1] [2018-12-03 17:18:59,716 INFO L423 AbstractCegarLoop]: === Iteration 70 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:18:59,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:18:59,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1672421472, now seen corresponding path program 68 times [2018-12-03 17:18:59,716 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:18:59,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:18:59,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:18:59,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:18:59,717 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:18:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:19:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11458 backedges. 0 proven. 11458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:19:01,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:19:01,861 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:19:01,861 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:19:01,862 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:19:01,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:19:01,862 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:19:01,870 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:19:01,870 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:19:02,043 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-12-03 17:19:02,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:19:02,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:19:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11458 backedges. 0 proven. 11458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:19:05,838 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:19:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 11458 backedges. 0 proven. 11458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:19:10,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:19:10,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 182 [2018-12-03 17:19:10,547 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:19:10,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-12-03 17:19:10,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-12-03 17:19:10,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14307, Invalid=18999, Unknown=0, NotChecked=0, Total=33306 [2018-12-03 17:19:10,549 INFO L87 Difference]: Start difference. First operand 344 states and 480 transitions. Second operand 140 states. [2018-12-03 17:19:11,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:19:11,960 INFO L93 Difference]: Finished difference Result 355 states and 495 transitions. [2018-12-03 17:19:11,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-12-03 17:19:11,960 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 343 [2018-12-03 17:19:11,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:19:11,962 INFO L225 Difference]: With dead ends: 355 [2018-12-03 17:19:11,962 INFO L226 Difference]: Without dead ends: 353 [2018-12-03 17:19:11,963 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 547 SyntacticMatches, 26 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19673 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=14307, Invalid=18999, Unknown=0, NotChecked=0, Total=33306 [2018-12-03 17:19:11,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2018-12-03 17:19:11,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 349. [2018-12-03 17:19:11,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2018-12-03 17:19:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 487 transitions. [2018-12-03 17:19:11,968 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 487 transitions. Word has length 343 [2018-12-03 17:19:11,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:19:11,969 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 487 transitions. [2018-12-03 17:19:11,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-12-03 17:19:11,969 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 487 transitions. [2018-12-03 17:19:11,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-12-03 17:19:11,970 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:19:11,970 INFO L402 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 1, 1, 1] [2018-12-03 17:19:11,970 INFO L423 AbstractCegarLoop]: === Iteration 71 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:19:11,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:19:11,970 INFO L82 PathProgramCache]: Analyzing trace with hash -64859183, now seen corresponding path program 69 times [2018-12-03 17:19:11,971 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:19:11,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:19:11,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:19:11,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:19:11,971 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:19:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:19:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11799 backedges. 0 proven. 11799 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:19:14,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:19:14,201 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:19:14,201 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:19:14,201 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:19:14,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:19:14,202 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:19:14,210 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:19:14,210 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:19:14,297 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:19:14,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:19:14,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:19:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11799 backedges. 0 proven. 11799 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:19:18,166 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:19:22,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11799 backedges. 0 proven. 11799 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:19:22,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:19:22,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 183 [2018-12-03 17:19:22,804 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:19:22,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-12-03 17:19:22,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-12-03 17:19:22,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14421, Invalid=19251, Unknown=0, NotChecked=0, Total=33672 [2018-12-03 17:19:22,806 INFO L87 Difference]: Start difference. First operand 349 states and 487 transitions. Second operand 142 states. [2018-12-03 17:19:24,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:19:24,240 INFO L93 Difference]: Finished difference Result 360 states and 502 transitions. [2018-12-03 17:19:24,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-12-03 17:19:24,240 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 348 [2018-12-03 17:19:24,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:19:24,242 INFO L225 Difference]: With dead ends: 360 [2018-12-03 17:19:24,242 INFO L226 Difference]: Without dead ends: 358 [2018-12-03 17:19:24,243 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 555 SyntacticMatches, 28 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20230 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=14421, Invalid=19251, Unknown=0, NotChecked=0, Total=33672 [2018-12-03 17:19:24,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2018-12-03 17:19:24,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 354. [2018-12-03 17:19:24,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2018-12-03 17:19:24,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 494 transitions. [2018-12-03 17:19:24,249 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 494 transitions. Word has length 348 [2018-12-03 17:19:24,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:19:24,249 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 494 transitions. [2018-12-03 17:19:24,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-12-03 17:19:24,250 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 494 transitions. [2018-12-03 17:19:24,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2018-12-03 17:19:24,251 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:19:24,251 INFO L402 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 1, 1, 1] [2018-12-03 17:19:24,251 INFO L423 AbstractCegarLoop]: === Iteration 72 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:19:24,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:19:24,251 INFO L82 PathProgramCache]: Analyzing trace with hash 2072682240, now seen corresponding path program 70 times [2018-12-03 17:19:24,252 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:19:24,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:19:24,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:19:24,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:19:24,253 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:19:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:19:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12145 backedges. 0 proven. 12145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:19:26,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:19:26,748 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:19:26,748 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:19:26,748 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:19:26,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:19:26,748 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:19:26,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:19:26,756 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:19:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:19:26,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:19:30,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12145 backedges. 0 proven. 12145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:19:30,811 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:19:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12145 backedges. 0 proven. 12145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:19:35,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:19:35,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 184 [2018-12-03 17:19:35,316 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:19:35,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-12-03 17:19:35,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-12-03 17:19:35,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14535, Invalid=19505, Unknown=0, NotChecked=0, Total=34040 [2018-12-03 17:19:35,318 INFO L87 Difference]: Start difference. First operand 354 states and 494 transitions. Second operand 144 states. [2018-12-03 17:19:36,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:19:36,876 INFO L93 Difference]: Finished difference Result 365 states and 509 transitions. [2018-12-03 17:19:36,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-12-03 17:19:36,877 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 353 [2018-12-03 17:19:36,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:19:36,878 INFO L225 Difference]: With dead ends: 365 [2018-12-03 17:19:36,878 INFO L226 Difference]: Without dead ends: 363 [2018-12-03 17:19:36,879 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 776 GetRequests, 563 SyntacticMatches, 30 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20787 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=14535, Invalid=19505, Unknown=0, NotChecked=0, Total=34040 [2018-12-03 17:19:36,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-12-03 17:19:36,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 359. [2018-12-03 17:19:36,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-12-03 17:19:36,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 501 transitions. [2018-12-03 17:19:36,886 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 501 transitions. Word has length 353 [2018-12-03 17:19:36,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:19:36,886 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 501 transitions. [2018-12-03 17:19:36,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-12-03 17:19:36,886 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 501 transitions. [2018-12-03 17:19:36,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-12-03 17:19:36,887 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:19:36,888 INFO L402 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 1, 1, 1] [2018-12-03 17:19:36,888 INFO L423 AbstractCegarLoop]: === Iteration 73 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:19:36,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:19:36,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1462961871, now seen corresponding path program 71 times [2018-12-03 17:19:36,888 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:19:36,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:19:36,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:19:36,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:19:36,889 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:19:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:19:39,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12496 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:19:39,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:19:39,266 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:19:39,266 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:19:39,266 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:19:39,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:19:39,266 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:19:39,274 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:19:39,274 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:19:39,479 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2018-12-03 17:19:39,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:19:39,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:19:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12496 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:19:43,513 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:19:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12496 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:19:48,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:19:48,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 185 [2018-12-03 17:19:48,245 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:19:48,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-12-03 17:19:48,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-12-03 17:19:48,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14649, Invalid=19761, Unknown=0, NotChecked=0, Total=34410 [2018-12-03 17:19:48,248 INFO L87 Difference]: Start difference. First operand 359 states and 501 transitions. Second operand 146 states. [2018-12-03 17:19:49,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:19:49,860 INFO L93 Difference]: Finished difference Result 370 states and 516 transitions. [2018-12-03 17:19:49,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-12-03 17:19:49,860 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 358 [2018-12-03 17:19:49,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:19:49,861 INFO L225 Difference]: With dead ends: 370 [2018-12-03 17:19:49,861 INFO L226 Difference]: Without dead ends: 368 [2018-12-03 17:19:49,862 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 571 SyntacticMatches, 32 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21344 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=14649, Invalid=19761, Unknown=0, NotChecked=0, Total=34410 [2018-12-03 17:19:49,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2018-12-03 17:19:49,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 364. [2018-12-03 17:19:49,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-12-03 17:19:49,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 508 transitions. [2018-12-03 17:19:49,869 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 508 transitions. Word has length 358 [2018-12-03 17:19:49,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:19:49,869 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 508 transitions. [2018-12-03 17:19:49,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-12-03 17:19:49,869 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 508 transitions. [2018-12-03 17:19:49,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-12-03 17:19:49,870 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:19:49,870 INFO L402 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 1, 1, 1] [2018-12-03 17:19:49,871 INFO L423 AbstractCegarLoop]: === Iteration 74 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:19:49,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:19:49,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1552962976, now seen corresponding path program 72 times [2018-12-03 17:19:49,871 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:19:49,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:19:49,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:19:49,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:19:49,872 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:19:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:19:52,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12852 backedges. 0 proven. 12852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:19:52,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:19:52,521 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:19:52,522 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:19:52,522 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:19:52,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:19:52,522 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:19:52,531 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:19:52,531 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:19:52,619 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:19:52,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:19:52,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:19:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12852 backedges. 0 proven. 12852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:19:56,815 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:20:01,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12852 backedges. 0 proven. 12852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:20:01,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:20:01,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 186 [2018-12-03 17:20:01,620 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:20:01,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-12-03 17:20:01,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-12-03 17:20:01,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14763, Invalid=20019, Unknown=0, NotChecked=0, Total=34782 [2018-12-03 17:20:01,623 INFO L87 Difference]: Start difference. First operand 364 states and 508 transitions. Second operand 148 states. [2018-12-03 17:20:03,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:20:03,229 INFO L93 Difference]: Finished difference Result 375 states and 523 transitions. [2018-12-03 17:20:03,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-12-03 17:20:03,229 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 363 [2018-12-03 17:20:03,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:20:03,230 INFO L225 Difference]: With dead ends: 375 [2018-12-03 17:20:03,231 INFO L226 Difference]: Without dead ends: 373 [2018-12-03 17:20:03,231 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 798 GetRequests, 579 SyntacticMatches, 34 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21901 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=14763, Invalid=20019, Unknown=0, NotChecked=0, Total=34782 [2018-12-03 17:20:03,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2018-12-03 17:20:03,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 369. [2018-12-03 17:20:03,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2018-12-03 17:20:03,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 515 transitions. [2018-12-03 17:20:03,239 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 515 transitions. Word has length 363 [2018-12-03 17:20:03,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:20:03,239 INFO L480 AbstractCegarLoop]: Abstraction has 369 states and 515 transitions. [2018-12-03 17:20:03,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-12-03 17:20:03,239 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 515 transitions. [2018-12-03 17:20:03,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-12-03 17:20:03,240 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:20:03,240 INFO L402 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 1, 1, 1] [2018-12-03 17:20:03,241 INFO L423 AbstractCegarLoop]: === Iteration 75 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:20:03,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:20:03,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1173382801, now seen corresponding path program 73 times [2018-12-03 17:20:03,241 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:20:03,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:20:03,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:20:03,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:20:03,242 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:20:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:20:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 0 proven. 13213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:20:05,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:20:05,639 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:20:05,639 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:20:05,639 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:20:05,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:20:05,640 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:20:05,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:20:05,647 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:20:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:20:05,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:20:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 0 proven. 13213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:20:09,883 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:20:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 0 proven. 13213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:20:14,637 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:20:14,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 187 [2018-12-03 17:20:14,637 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:20:14,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-12-03 17:20:14,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-12-03 17:20:14,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14877, Invalid=20279, Unknown=0, NotChecked=0, Total=35156 [2018-12-03 17:20:14,640 INFO L87 Difference]: Start difference. First operand 369 states and 515 transitions. Second operand 150 states. [2018-12-03 17:20:16,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:20:16,310 INFO L93 Difference]: Finished difference Result 380 states and 530 transitions. [2018-12-03 17:20:16,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-12-03 17:20:16,310 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 368 [2018-12-03 17:20:16,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:20:16,312 INFO L225 Difference]: With dead ends: 380 [2018-12-03 17:20:16,312 INFO L226 Difference]: Without dead ends: 378 [2018-12-03 17:20:16,313 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 587 SyntacticMatches, 36 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22458 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=14877, Invalid=20279, Unknown=0, NotChecked=0, Total=35156 [2018-12-03 17:20:16,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2018-12-03 17:20:16,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 374. [2018-12-03 17:20:16,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2018-12-03 17:20:16,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 522 transitions. [2018-12-03 17:20:16,320 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 522 transitions. Word has length 368 [2018-12-03 17:20:16,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:20:16,320 INFO L480 AbstractCegarLoop]: Abstraction has 374 states and 522 transitions. [2018-12-03 17:20:16,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-12-03 17:20:16,321 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 522 transitions. [2018-12-03 17:20:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-12-03 17:20:16,322 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:20:16,322 INFO L402 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 1, 1, 1] [2018-12-03 17:20:16,322 INFO L423 AbstractCegarLoop]: === Iteration 76 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:20:16,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:20:16,323 INFO L82 PathProgramCache]: Analyzing trace with hash 559563840, now seen corresponding path program 74 times [2018-12-03 17:20:16,323 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:20:16,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:20:16,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:20:16,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:20:16,323 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:20:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:20:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 13579 backedges. 0 proven. 13579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:20:18,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:20:18,827 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:20:18,828 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:20:18,828 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:20:18,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:20:18,828 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:20:18,836 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:20:18,836 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:20:19,024 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2018-12-03 17:20:19,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:20:19,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:20:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13579 backedges. 0 proven. 13579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:20:23,413 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:20:28,275 INFO L134 CoverageAnalysis]: Checked inductivity of 13579 backedges. 0 proven. 13579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:20:28,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:20:28,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 188 [2018-12-03 17:20:28,294 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:20:28,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-12-03 17:20:28,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-12-03 17:20:28,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14991, Invalid=20541, Unknown=0, NotChecked=0, Total=35532 [2018-12-03 17:20:28,297 INFO L87 Difference]: Start difference. First operand 374 states and 522 transitions. Second operand 152 states. [2018-12-03 17:20:30,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:20:30,087 INFO L93 Difference]: Finished difference Result 385 states and 537 transitions. [2018-12-03 17:20:30,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-12-03 17:20:30,088 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 373 [2018-12-03 17:20:30,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:20:30,089 INFO L225 Difference]: With dead ends: 385 [2018-12-03 17:20:30,089 INFO L226 Difference]: Without dead ends: 383 [2018-12-03 17:20:30,090 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 820 GetRequests, 595 SyntacticMatches, 38 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23015 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=14991, Invalid=20541, Unknown=0, NotChecked=0, Total=35532 [2018-12-03 17:20:30,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-12-03 17:20:30,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 379. [2018-12-03 17:20:30,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2018-12-03 17:20:30,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 529 transitions. [2018-12-03 17:20:30,097 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 529 transitions. Word has length 373 [2018-12-03 17:20:30,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:20:30,097 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 529 transitions. [2018-12-03 17:20:30,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-12-03 17:20:30,098 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 529 transitions. [2018-12-03 17:20:30,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2018-12-03 17:20:30,099 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:20:30,099 INFO L402 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 1, 1, 1] [2018-12-03 17:20:30,099 INFO L423 AbstractCegarLoop]: === Iteration 77 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:20:30,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:20:30,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1228053489, now seen corresponding path program 75 times [2018-12-03 17:20:30,100 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:20:30,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:20:30,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:20:30,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:20:30,100 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:20:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:20:32,971 INFO L134 CoverageAnalysis]: Checked inductivity of 13950 backedges. 0 proven. 13950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:20:32,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:20:32,971 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:20:32,972 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:20:32,972 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:20:32,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:20:32,972 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:20:32,980 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:20:32,981 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:20:33,070 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:20:33,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:20:33,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:20:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13950 backedges. 0 proven. 13950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:20:37,441 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:20:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13950 backedges. 0 proven. 13950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:20:42,364 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:20:42,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 189 [2018-12-03 17:20:42,365 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:20:42,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-12-03 17:20:42,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-12-03 17:20:42,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15105, Invalid=20805, Unknown=0, NotChecked=0, Total=35910 [2018-12-03 17:20:42,368 INFO L87 Difference]: Start difference. First operand 379 states and 529 transitions. Second operand 154 states. [2018-12-03 17:20:44,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:20:44,269 INFO L93 Difference]: Finished difference Result 390 states and 544 transitions. [2018-12-03 17:20:44,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-12-03 17:20:44,269 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 378 [2018-12-03 17:20:44,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:20:44,271 INFO L225 Difference]: With dead ends: 390 [2018-12-03 17:20:44,271 INFO L226 Difference]: Without dead ends: 388 [2018-12-03 17:20:44,272 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 831 GetRequests, 603 SyntacticMatches, 40 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23572 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=15105, Invalid=20805, Unknown=0, NotChecked=0, Total=35910 [2018-12-03 17:20:44,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2018-12-03 17:20:44,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 384. [2018-12-03 17:20:44,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2018-12-03 17:20:44,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 536 transitions. [2018-12-03 17:20:44,279 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 536 transitions. Word has length 378 [2018-12-03 17:20:44,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:20:44,279 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 536 transitions. [2018-12-03 17:20:44,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-12-03 17:20:44,279 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 536 transitions. [2018-12-03 17:20:44,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2018-12-03 17:20:44,280 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:20:44,281 INFO L402 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 1, 1, 1] [2018-12-03 17:20:44,281 INFO L423 AbstractCegarLoop]: === Iteration 78 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:20:44,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:20:44,281 INFO L82 PathProgramCache]: Analyzing trace with hash -335385888, now seen corresponding path program 76 times [2018-12-03 17:20:44,281 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:20:44,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:20:44,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:20:44,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:20:44,282 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:20:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:20:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14326 backedges. 0 proven. 14326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:20:47,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:20:47,002 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:20:47,002 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:20:47,002 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:20:47,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:20:47,002 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:20:47,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:20:47,010 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:20:47,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:20:47,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:20:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14326 backedges. 0 proven. 14326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:20:51,455 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:20:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 14326 backedges. 0 proven. 14326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:20:56,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:20:56,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 190 [2018-12-03 17:20:56,385 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:20:56,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-12-03 17:20:56,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-12-03 17:20:56,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15219, Invalid=21071, Unknown=0, NotChecked=0, Total=36290 [2018-12-03 17:20:56,387 INFO L87 Difference]: Start difference. First operand 384 states and 536 transitions. Second operand 156 states. [2018-12-03 17:20:58,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:20:58,204 INFO L93 Difference]: Finished difference Result 395 states and 551 transitions. [2018-12-03 17:20:58,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-12-03 17:20:58,205 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 383 [2018-12-03 17:20:58,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:20:58,206 INFO L225 Difference]: With dead ends: 395 [2018-12-03 17:20:58,207 INFO L226 Difference]: Without dead ends: 393 [2018-12-03 17:20:58,207 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 842 GetRequests, 611 SyntacticMatches, 42 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24129 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=15219, Invalid=21071, Unknown=0, NotChecked=0, Total=36290 [2018-12-03 17:20:58,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-12-03 17:20:58,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 389. [2018-12-03 17:20:58,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2018-12-03 17:20:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 543 transitions. [2018-12-03 17:20:58,215 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 543 transitions. Word has length 383 [2018-12-03 17:20:58,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:20:58,215 INFO L480 AbstractCegarLoop]: Abstraction has 389 states and 543 transitions. [2018-12-03 17:20:58,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-12-03 17:20:58,215 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 543 transitions. [2018-12-03 17:20:58,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2018-12-03 17:20:58,216 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:20:58,217 INFO L402 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 1, 1, 1] [2018-12-03 17:20:58,217 INFO L423 AbstractCegarLoop]: === Iteration 79 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:20:58,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:20:58,217 INFO L82 PathProgramCache]: Analyzing trace with hash -793142959, now seen corresponding path program 77 times [2018-12-03 17:20:58,217 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:20:58,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:20:58,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:20:58,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:20:58,218 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:20:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:21:00,976 INFO L134 CoverageAnalysis]: Checked inductivity of 14707 backedges. 0 proven. 14707 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:21:00,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:21:00,977 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:21:00,977 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:21:00,977 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:21:00,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:21:00,977 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:21:00,985 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:21:00,985 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:21:01,188 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 78 check-sat command(s) [2018-12-03 17:21:01,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:21:01,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:21:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 14707 backedges. 0 proven. 14707 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:21:05,855 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:21:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 14707 backedges. 0 proven. 14707 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:21:10,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:21:10,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 191 [2018-12-03 17:21:10,812 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:21:10,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-12-03 17:21:10,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-12-03 17:21:10,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15333, Invalid=21339, Unknown=0, NotChecked=0, Total=36672 [2018-12-03 17:21:10,815 INFO L87 Difference]: Start difference. First operand 389 states and 543 transitions. Second operand 158 states. [2018-12-03 17:21:12,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:21:12,825 INFO L93 Difference]: Finished difference Result 400 states and 558 transitions. [2018-12-03 17:21:12,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-12-03 17:21:12,825 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 388 [2018-12-03 17:21:12,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:21:12,827 INFO L225 Difference]: With dead ends: 400 [2018-12-03 17:21:12,827 INFO L226 Difference]: Without dead ends: 398 [2018-12-03 17:21:12,828 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 853 GetRequests, 619 SyntacticMatches, 44 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24686 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=15333, Invalid=21339, Unknown=0, NotChecked=0, Total=36672 [2018-12-03 17:21:12,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-12-03 17:21:12,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 394. [2018-12-03 17:21:12,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2018-12-03 17:21:12,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 550 transitions. [2018-12-03 17:21:12,835 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 550 transitions. Word has length 388 [2018-12-03 17:21:12,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:21:12,836 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 550 transitions. [2018-12-03 17:21:12,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-12-03 17:21:12,836 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 550 transitions. [2018-12-03 17:21:12,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2018-12-03 17:21:12,837 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:21:12,837 INFO L402 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 1, 1, 1] [2018-12-03 17:21:12,837 INFO L423 AbstractCegarLoop]: === Iteration 80 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:21:12,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:21:12,838 INFO L82 PathProgramCache]: Analyzing trace with hash -2044540544, now seen corresponding path program 78 times [2018-12-03 17:21:12,838 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:21:12,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:21:12,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:21:12,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:21:12,839 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:21:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:21:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 15093 backedges. 0 proven. 15093 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:21:15,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:21:15,597 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:21:15,597 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:21:15,597 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:21:15,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:21:15,598 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:21:15,605 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:21:15,605 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:21:15,702 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:21:15,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:21:15,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:21:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 15093 backedges. 0 proven. 15093 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:21:20,581 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:21:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 15093 backedges. 0 proven. 15093 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:21:25,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:21:25,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 192 [2018-12-03 17:21:25,649 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:21:25,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-12-03 17:21:25,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-12-03 17:21:25,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15447, Invalid=21609, Unknown=0, NotChecked=0, Total=37056 [2018-12-03 17:21:25,652 INFO L87 Difference]: Start difference. First operand 394 states and 550 transitions. Second operand 160 states. [2018-12-03 17:21:27,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:21:27,666 INFO L93 Difference]: Finished difference Result 405 states and 565 transitions. [2018-12-03 17:21:27,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-12-03 17:21:27,667 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 393 [2018-12-03 17:21:27,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:21:27,668 INFO L225 Difference]: With dead ends: 405 [2018-12-03 17:21:27,668 INFO L226 Difference]: Without dead ends: 403 [2018-12-03 17:21:27,669 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 627 SyntacticMatches, 46 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25243 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=15447, Invalid=21609, Unknown=0, NotChecked=0, Total=37056 [2018-12-03 17:21:27,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2018-12-03 17:21:27,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 399. [2018-12-03 17:21:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2018-12-03 17:21:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 557 transitions. [2018-12-03 17:21:27,677 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 557 transitions. Word has length 393 [2018-12-03 17:21:27,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:21:27,677 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 557 transitions. [2018-12-03 17:21:27,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-12-03 17:21:27,677 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 557 transitions. [2018-12-03 17:21:27,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2018-12-03 17:21:27,679 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:21:27,679 INFO L402 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 1, 1, 1] [2018-12-03 17:21:27,679 INFO L423 AbstractCegarLoop]: === Iteration 81 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:21:27,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:21:27,679 INFO L82 PathProgramCache]: Analyzing trace with hash 53173937, now seen corresponding path program 79 times [2018-12-03 17:21:27,679 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:21:27,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:21:27,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:21:27,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:21:27,680 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:21:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:21:30,717 INFO L134 CoverageAnalysis]: Checked inductivity of 15484 backedges. 0 proven. 15484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:21:30,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:21:30,718 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:21:30,718 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:21:30,718 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:21:30,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:21:30,718 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:21:30,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:21:30,727 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:21:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:21:30,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:21:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 15484 backedges. 0 proven. 15484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:21:35,722 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:21:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 15484 backedges. 0 proven. 15484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:21:40,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:21:40,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 193 [2018-12-03 17:21:40,796 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:21:40,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-12-03 17:21:40,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-12-03 17:21:40,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15561, Invalid=21881, Unknown=0, NotChecked=0, Total=37442 [2018-12-03 17:21:40,799 INFO L87 Difference]: Start difference. First operand 399 states and 557 transitions. Second operand 162 states. [2018-12-03 17:21:42,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:21:42,869 INFO L93 Difference]: Finished difference Result 410 states and 572 transitions. [2018-12-03 17:21:42,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-12-03 17:21:42,869 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 398 [2018-12-03 17:21:42,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:21:42,871 INFO L225 Difference]: With dead ends: 410 [2018-12-03 17:21:42,871 INFO L226 Difference]: Without dead ends: 408 [2018-12-03 17:21:42,872 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 635 SyntacticMatches, 48 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25800 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=15561, Invalid=21881, Unknown=0, NotChecked=0, Total=37442 [2018-12-03 17:21:42,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2018-12-03 17:21:42,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 404. [2018-12-03 17:21:42,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2018-12-03 17:21:42,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 564 transitions. [2018-12-03 17:21:42,879 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 564 transitions. Word has length 398 [2018-12-03 17:21:42,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:21:42,880 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 564 transitions. [2018-12-03 17:21:42,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-12-03 17:21:42,880 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 564 transitions. [2018-12-03 17:21:42,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2018-12-03 17:21:42,881 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:21:42,881 INFO L402 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 1, 1, 1] [2018-12-03 17:21:42,881 INFO L423 AbstractCegarLoop]: === Iteration 82 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:21:42,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:21:42,882 INFO L82 PathProgramCache]: Analyzing trace with hash 13983776, now seen corresponding path program 80 times [2018-12-03 17:21:42,882 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:21:42,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:21:42,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:21:42,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:21:42,883 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:21:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:21:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 15880 backedges. 0 proven. 15880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:21:46,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:21:46,092 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:21:46,092 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:21:46,092 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:21:46,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:21:46,092 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:21:46,101 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:21:46,101 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:21:46,312 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2018-12-03 17:21:46,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:21:46,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:21:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 15880 backedges. 0 proven. 15880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:21:51,404 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:21:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 15880 backedges. 0 proven. 15880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:21:56,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:21:56,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 194 [2018-12-03 17:21:56,486 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:21:56,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-12-03 17:21:56,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-12-03 17:21:56,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15675, Invalid=22155, Unknown=0, NotChecked=0, Total=37830 [2018-12-03 17:21:56,489 INFO L87 Difference]: Start difference. First operand 404 states and 564 transitions. Second operand 164 states. [2018-12-03 17:21:58,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:21:58,542 INFO L93 Difference]: Finished difference Result 415 states and 579 transitions. [2018-12-03 17:21:58,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-12-03 17:21:58,542 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 403 [2018-12-03 17:21:58,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:21:58,544 INFO L225 Difference]: With dead ends: 415 [2018-12-03 17:21:58,544 INFO L226 Difference]: Without dead ends: 413 [2018-12-03 17:21:58,545 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 886 GetRequests, 643 SyntacticMatches, 50 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26357 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=15675, Invalid=22155, Unknown=0, NotChecked=0, Total=37830 [2018-12-03 17:21:58,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2018-12-03 17:21:58,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 409. [2018-12-03 17:21:58,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2018-12-03 17:21:58,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 571 transitions. [2018-12-03 17:21:58,552 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 571 transitions. Word has length 403 [2018-12-03 17:21:58,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:21:58,553 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 571 transitions. [2018-12-03 17:21:58,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-12-03 17:21:58,553 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 571 transitions. [2018-12-03 17:21:58,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2018-12-03 17:21:58,554 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:21:58,555 INFO L402 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 81, 1, 1, 1] [2018-12-03 17:21:58,555 INFO L423 AbstractCegarLoop]: === Iteration 83 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:21:58,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:21:58,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1873669137, now seen corresponding path program 81 times [2018-12-03 17:21:58,555 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:21:58,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:21:58,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:21:58,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:21:58,556 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:21:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:22:01,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16281 backedges. 0 proven. 16281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:22:01,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:22:01,594 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:22:01,594 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:22:01,595 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:22:01,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:22:01,595 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:22:01,603 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:22:01,603 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:22:01,702 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:22:01,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:22:01,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:22:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16281 backedges. 0 proven. 16281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:22:06,894 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:22:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16281 backedges. 0 proven. 16281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:22:11,967 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:22:11,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 195 [2018-12-03 17:22:11,968 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:22:11,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-12-03 17:22:11,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-12-03 17:22:11,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15789, Invalid=22431, Unknown=0, NotChecked=0, Total=38220 [2018-12-03 17:22:11,971 INFO L87 Difference]: Start difference. First operand 409 states and 571 transitions. Second operand 166 states. [2018-12-03 17:22:14,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:22:14,161 INFO L93 Difference]: Finished difference Result 420 states and 586 transitions. [2018-12-03 17:22:14,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-12-03 17:22:14,161 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 408 [2018-12-03 17:22:14,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:22:14,163 INFO L225 Difference]: With dead ends: 420 [2018-12-03 17:22:14,163 INFO L226 Difference]: Without dead ends: 418 [2018-12-03 17:22:14,164 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 897 GetRequests, 651 SyntacticMatches, 52 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26914 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=15789, Invalid=22431, Unknown=0, NotChecked=0, Total=38220 [2018-12-03 17:22:14,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2018-12-03 17:22:14,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 414. [2018-12-03 17:22:14,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2018-12-03 17:22:14,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 578 transitions. [2018-12-03 17:22:14,171 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 578 transitions. Word has length 408 [2018-12-03 17:22:14,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:22:14,172 INFO L480 AbstractCegarLoop]: Abstraction has 414 states and 578 transitions. [2018-12-03 17:22:14,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-12-03 17:22:14,172 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 578 transitions. [2018-12-03 17:22:14,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2018-12-03 17:22:14,173 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:22:14,174 INFO L402 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 82, 1, 1, 1] [2018-12-03 17:22:14,174 INFO L423 AbstractCegarLoop]: === Iteration 84 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:22:14,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:22:14,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1421094592, now seen corresponding path program 82 times [2018-12-03 17:22:14,174 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:22:14,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:22:14,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:22:14,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:22:14,175 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:22:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:22:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16687 backedges. 0 proven. 16687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:22:17,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:22:17,216 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:22:17,216 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:22:17,216 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:22:17,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:22:17,216 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:22:17,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:22:17,226 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:22:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:22:17,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:22:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16687 backedges. 0 proven. 16687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:22:22,671 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:22:27,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16687 backedges. 0 proven. 16687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:22:27,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:22:27,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84, 84] total 196 [2018-12-03 17:22:27,695 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:22:27,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-12-03 17:22:27,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-12-03 17:22:27,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15903, Invalid=22709, Unknown=0, NotChecked=0, Total=38612 [2018-12-03 17:22:27,698 INFO L87 Difference]: Start difference. First operand 414 states and 578 transitions. Second operand 168 states. [2018-12-03 17:22:30,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:22:30,004 INFO L93 Difference]: Finished difference Result 425 states and 593 transitions. [2018-12-03 17:22:30,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-12-03 17:22:30,004 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 413 [2018-12-03 17:22:30,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:22:30,006 INFO L225 Difference]: With dead ends: 425 [2018-12-03 17:22:30,006 INFO L226 Difference]: Without dead ends: 423 [2018-12-03 17:22:30,008 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 659 SyntacticMatches, 54 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27471 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=15903, Invalid=22709, Unknown=0, NotChecked=0, Total=38612 [2018-12-03 17:22:30,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-12-03 17:22:30,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 419. [2018-12-03 17:22:30,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2018-12-03 17:22:30,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 585 transitions. [2018-12-03 17:22:30,016 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 585 transitions. Word has length 413 [2018-12-03 17:22:30,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:22:30,017 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 585 transitions. [2018-12-03 17:22:30,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-12-03 17:22:30,017 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 585 transitions. [2018-12-03 17:22:30,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2018-12-03 17:22:30,018 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:22:30,018 INFO L402 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 83, 1, 1, 1] [2018-12-03 17:22:30,019 INFO L423 AbstractCegarLoop]: === Iteration 85 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:22:30,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:22:30,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1843872113, now seen corresponding path program 83 times [2018-12-03 17:22:30,019 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:22:30,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:22:30,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:22:30,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:22:30,020 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:22:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:22:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 17098 backedges. 0 proven. 17098 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:22:33,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:22:33,171 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:22:33,171 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:22:33,171 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:22:33,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:22:33,172 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:22:33,180 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:22:33,180 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:22:33,393 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2018-12-03 17:22:33,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:22:33,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:22:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 17098 backedges. 0 proven. 17098 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:22:38,858 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:22:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17098 backedges. 0 proven. 17098 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:22:44,010 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:22:44,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 197 [2018-12-03 17:22:44,010 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:22:44,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-12-03 17:22:44,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-12-03 17:22:44,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16017, Invalid=22989, Unknown=0, NotChecked=0, Total=39006 [2018-12-03 17:22:44,014 INFO L87 Difference]: Start difference. First operand 419 states and 585 transitions. Second operand 170 states. [2018-12-03 17:22:46,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:22:46,282 INFO L93 Difference]: Finished difference Result 430 states and 600 transitions. [2018-12-03 17:22:46,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-12-03 17:22:46,282 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 418 [2018-12-03 17:22:46,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:22:46,284 INFO L225 Difference]: With dead ends: 430 [2018-12-03 17:22:46,284 INFO L226 Difference]: Without dead ends: 428 [2018-12-03 17:22:46,285 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 667 SyntacticMatches, 56 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28028 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=16017, Invalid=22989, Unknown=0, NotChecked=0, Total=39006 [2018-12-03 17:22:46,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2018-12-03 17:22:46,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 424. [2018-12-03 17:22:46,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-12-03 17:22:46,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 592 transitions. [2018-12-03 17:22:46,293 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 592 transitions. Word has length 418 [2018-12-03 17:22:46,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:22:46,294 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 592 transitions. [2018-12-03 17:22:46,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-12-03 17:22:46,294 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 592 transitions. [2018-12-03 17:22:46,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-12-03 17:22:46,296 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:22:46,296 INFO L402 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 84, 1, 1, 1] [2018-12-03 17:22:46,296 INFO L423 AbstractCegarLoop]: === Iteration 86 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:22:46,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:22:46,296 INFO L82 PathProgramCache]: Analyzing trace with hash 31012192, now seen corresponding path program 84 times [2018-12-03 17:22:46,297 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:22:46,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:22:46,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:22:46,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:22:46,297 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:22:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:22:49,550 INFO L134 CoverageAnalysis]: Checked inductivity of 17514 backedges. 0 proven. 17514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:22:49,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:22:49,550 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:22:49,551 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:22:49,551 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:22:49,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:22:49,551 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:22:49,559 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:22:49,559 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:22:49,661 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:22:49,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:22:49,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:22:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 17514 backedges. 0 proven. 17514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:22:55,015 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:22:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17514 backedges. 0 proven. 17514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:22:59,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:22:59,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86, 86] total 198 [2018-12-03 17:22:59,916 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:22:59,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-12-03 17:22:59,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-12-03 17:22:59,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16131, Invalid=23271, Unknown=0, NotChecked=0, Total=39402 [2018-12-03 17:22:59,920 INFO L87 Difference]: Start difference. First operand 424 states and 592 transitions. Second operand 172 states. [2018-12-03 17:23:02,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:23:02,318 INFO L93 Difference]: Finished difference Result 435 states and 607 transitions. [2018-12-03 17:23:02,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-12-03 17:23:02,318 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 423 [2018-12-03 17:23:02,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:23:02,320 INFO L225 Difference]: With dead ends: 435 [2018-12-03 17:23:02,320 INFO L226 Difference]: Without dead ends: 433 [2018-12-03 17:23:02,321 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 675 SyntacticMatches, 58 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28585 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=16131, Invalid=23271, Unknown=0, NotChecked=0, Total=39402 [2018-12-03 17:23:02,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2018-12-03 17:23:02,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 429. [2018-12-03 17:23:02,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2018-12-03 17:23:02,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 599 transitions. [2018-12-03 17:23:02,329 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 599 transitions. Word has length 423 [2018-12-03 17:23:02,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:23:02,330 INFO L480 AbstractCegarLoop]: Abstraction has 429 states and 599 transitions. [2018-12-03 17:23:02,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-12-03 17:23:02,330 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 599 transitions. [2018-12-03 17:23:02,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2018-12-03 17:23:02,332 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:23:02,333 INFO L402 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 85, 1, 1, 1] [2018-12-03 17:23:02,333 INFO L423 AbstractCegarLoop]: === Iteration 87 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:23:02,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:23:02,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2113756881, now seen corresponding path program 85 times [2018-12-03 17:23:02,333 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:23:02,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:23:02,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:23:02,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:23:02,334 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:23:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:23:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 17935 backedges. 0 proven. 17935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:23:05,832 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:23:05,832 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:23:05,832 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:23:05,832 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:23:05,832 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:23:05,832 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:23:05,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:23:05,841 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:23:05,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:23:05,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:23:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 17935 backedges. 0 proven. 17935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:23:11,612 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:23:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17935 backedges. 0 proven. 17935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:23:16,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:23:16,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87, 87] total 199 [2018-12-03 17:23:16,738 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:23:16,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-12-03 17:23:16,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-12-03 17:23:16,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16245, Invalid=23555, Unknown=0, NotChecked=0, Total=39800 [2018-12-03 17:23:16,741 INFO L87 Difference]: Start difference. First operand 429 states and 599 transitions. Second operand 174 states. [2018-12-03 17:23:19,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:23:19,232 INFO L93 Difference]: Finished difference Result 440 states and 614 transitions. [2018-12-03 17:23:19,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-12-03 17:23:19,232 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 428 [2018-12-03 17:23:19,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:23:19,234 INFO L225 Difference]: With dead ends: 440 [2018-12-03 17:23:19,234 INFO L226 Difference]: Without dead ends: 438 [2018-12-03 17:23:19,235 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 941 GetRequests, 683 SyntacticMatches, 60 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29142 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=16245, Invalid=23555, Unknown=0, NotChecked=0, Total=39800 [2018-12-03 17:23:19,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2018-12-03 17:23:19,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 434. [2018-12-03 17:23:19,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-12-03 17:23:19,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 606 transitions. [2018-12-03 17:23:19,243 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 606 transitions. Word has length 428 [2018-12-03 17:23:19,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:23:19,243 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 606 transitions. [2018-12-03 17:23:19,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-12-03 17:23:19,243 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 606 transitions. [2018-12-03 17:23:19,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2018-12-03 17:23:19,245 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:23:19,245 INFO L402 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 86, 1, 1, 1] [2018-12-03 17:23:19,245 INFO L423 AbstractCegarLoop]: === Iteration 88 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:23:19,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:23:19,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1344375808, now seen corresponding path program 86 times [2018-12-03 17:23:19,245 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:23:19,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:23:19,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:23:19,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:23:19,246 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:23:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:23:22,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18361 backedges. 0 proven. 18361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:23:22,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:23:22,760 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:23:22,761 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:23:22,761 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:23:22,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:23:22,761 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:23:22,771 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:23:22,771 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:23:23,001 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 87 check-sat command(s) [2018-12-03 17:23:23,002 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:23:23,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:23:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 18361 backedges. 0 proven. 18361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:23:28,715 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:23:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18361 backedges. 0 proven. 18361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:23:33,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:23:33,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88, 88] total 200 [2018-12-03 17:23:33,956 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:23:33,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-12-03 17:23:33,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-12-03 17:23:33,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16359, Invalid=23841, Unknown=0, NotChecked=0, Total=40200 [2018-12-03 17:23:33,960 INFO L87 Difference]: Start difference. First operand 434 states and 606 transitions. Second operand 176 states. [2018-12-03 17:23:36,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:23:36,494 INFO L93 Difference]: Finished difference Result 445 states and 621 transitions. [2018-12-03 17:23:36,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-12-03 17:23:36,494 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 433 [2018-12-03 17:23:36,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:23:36,496 INFO L225 Difference]: With dead ends: 445 [2018-12-03 17:23:36,496 INFO L226 Difference]: Without dead ends: 443 [2018-12-03 17:23:36,497 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 952 GetRequests, 691 SyntacticMatches, 62 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29699 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=16359, Invalid=23841, Unknown=0, NotChecked=0, Total=40200 [2018-12-03 17:23:36,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2018-12-03 17:23:36,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 439. [2018-12-03 17:23:36,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2018-12-03 17:23:36,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 613 transitions. [2018-12-03 17:23:36,505 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 613 transitions. Word has length 433 [2018-12-03 17:23:36,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:23:36,505 INFO L480 AbstractCegarLoop]: Abstraction has 439 states and 613 transitions. [2018-12-03 17:23:36,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-12-03 17:23:36,506 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 613 transitions. [2018-12-03 17:23:36,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2018-12-03 17:23:36,507 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:23:36,507 INFO L402 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 87, 1, 1, 1] [2018-12-03 17:23:36,508 INFO L423 AbstractCegarLoop]: === Iteration 89 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:23:36,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:23:36,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1466547151, now seen corresponding path program 87 times [2018-12-03 17:23:36,508 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:23:36,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:23:36,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:23:36,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:23:36,509 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:23:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:23:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18792 backedges. 0 proven. 18792 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:23:39,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:23:39,953 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:23:39,954 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:23:39,954 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:23:39,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:23:39,954 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:23:39,962 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:23:39,962 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:23:40,069 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:23:40,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:23:40,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:23:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 18792 backedges. 0 proven. 18792 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:23:45,925 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:23:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 18792 backedges. 0 proven. 18792 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:23:51,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:23:51,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 201 [2018-12-03 17:23:51,076 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:23:51,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 178 states [2018-12-03 17:23:51,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2018-12-03 17:23:51,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16473, Invalid=24129, Unknown=0, NotChecked=0, Total=40602 [2018-12-03 17:23:51,080 INFO L87 Difference]: Start difference. First operand 439 states and 613 transitions. Second operand 178 states. [2018-12-03 17:23:53,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:23:53,681 INFO L93 Difference]: Finished difference Result 450 states and 628 transitions. [2018-12-03 17:23:53,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-12-03 17:23:53,681 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 438 [2018-12-03 17:23:53,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:23:53,683 INFO L225 Difference]: With dead ends: 450 [2018-12-03 17:23:53,683 INFO L226 Difference]: Without dead ends: 448 [2018-12-03 17:23:53,684 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 963 GetRequests, 699 SyntacticMatches, 64 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30256 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=16473, Invalid=24129, Unknown=0, NotChecked=0, Total=40602 [2018-12-03 17:23:53,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2018-12-03 17:23:53,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 444. [2018-12-03 17:23:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2018-12-03 17:23:53,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 620 transitions. [2018-12-03 17:23:53,692 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 620 transitions. Word has length 438 [2018-12-03 17:23:53,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:23:53,692 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 620 transitions. [2018-12-03 17:23:53,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 178 states. [2018-12-03 17:23:53,692 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 620 transitions. [2018-12-03 17:23:53,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2018-12-03 17:23:53,694 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:23:53,694 INFO L402 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 88, 1, 1, 1] [2018-12-03 17:23:53,694 INFO L423 AbstractCegarLoop]: === Iteration 90 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:23:53,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:23:53,694 INFO L82 PathProgramCache]: Analyzing trace with hash -841094496, now seen corresponding path program 88 times [2018-12-03 17:23:53,694 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:23:53,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:23:53,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:23:53,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:23:53,695 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:23:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:23:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 19228 backedges. 0 proven. 19228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:23:57,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:23:57,442 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:23:57,442 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:23:57,442 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:23:57,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:23:57,442 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:23:57,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:23:57,451 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:23:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:23:57,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:24:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 19228 backedges. 0 proven. 19228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:24:03,579 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:24:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 19228 backedges. 0 proven. 19228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:24:08,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:24:08,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90, 90] total 202 [2018-12-03 17:24:08,798 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:24:08,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-12-03 17:24:08,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-12-03 17:24:08,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16587, Invalid=24419, Unknown=0, NotChecked=0, Total=41006 [2018-12-03 17:24:08,801 INFO L87 Difference]: Start difference. First operand 444 states and 620 transitions. Second operand 180 states. [2018-12-03 17:24:11,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:24:11,501 INFO L93 Difference]: Finished difference Result 455 states and 635 transitions. [2018-12-03 17:24:11,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-12-03 17:24:11,501 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 443 [2018-12-03 17:24:11,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:24:11,503 INFO L225 Difference]: With dead ends: 455 [2018-12-03 17:24:11,503 INFO L226 Difference]: Without dead ends: 453 [2018-12-03 17:24:11,504 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 974 GetRequests, 707 SyntacticMatches, 66 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30813 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=16587, Invalid=24419, Unknown=0, NotChecked=0, Total=41006 [2018-12-03 17:24:11,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2018-12-03 17:24:11,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 449. [2018-12-03 17:24:11,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2018-12-03 17:24:11,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 627 transitions. [2018-12-03 17:24:11,512 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 627 transitions. Word has length 443 [2018-12-03 17:24:11,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:24:11,513 INFO L480 AbstractCegarLoop]: Abstraction has 449 states and 627 transitions. [2018-12-03 17:24:11,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-12-03 17:24:11,513 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 627 transitions. [2018-12-03 17:24:11,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2018-12-03 17:24:11,515 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:24:11,515 INFO L402 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 89, 1, 1, 1] [2018-12-03 17:24:11,515 INFO L423 AbstractCegarLoop]: === Iteration 91 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:24:11,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:24:11,516 INFO L82 PathProgramCache]: Analyzing trace with hash -556273263, now seen corresponding path program 89 times [2018-12-03 17:24:11,516 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:24:11,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:24:11,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:24:11,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:24:11,516 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:24:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:24:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 19669 backedges. 0 proven. 19669 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:24:15,292 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:24:15,292 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:24:15,292 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:24:15,292 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:24:15,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:24:15,293 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:24:15,300 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:24:15,300 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:24:15,538 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 90 check-sat command(s) [2018-12-03 17:24:15,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:24:15,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:24:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 19669 backedges. 0 proven. 19669 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:24:21,620 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:24:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 19669 backedges. 0 proven. 19669 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:24:26,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:24:26,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91, 91] total 203 [2018-12-03 17:24:26,976 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:24:26,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 182 states [2018-12-03 17:24:26,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2018-12-03 17:24:26,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16701, Invalid=24711, Unknown=0, NotChecked=0, Total=41412 [2018-12-03 17:24:26,979 INFO L87 Difference]: Start difference. First operand 449 states and 627 transitions. Second operand 182 states. [2018-12-03 17:24:29,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:24:29,767 INFO L93 Difference]: Finished difference Result 460 states and 642 transitions. [2018-12-03 17:24:29,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-12-03 17:24:29,767 INFO L78 Accepts]: Start accepts. Automaton has 182 states. Word has length 448 [2018-12-03 17:24:29,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:24:29,769 INFO L225 Difference]: With dead ends: 460 [2018-12-03 17:24:29,769 INFO L226 Difference]: Without dead ends: 458 [2018-12-03 17:24:29,770 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 985 GetRequests, 715 SyntacticMatches, 68 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31370 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=16701, Invalid=24711, Unknown=0, NotChecked=0, Total=41412 [2018-12-03 17:24:29,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2018-12-03 17:24:29,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 454. [2018-12-03 17:24:29,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2018-12-03 17:24:29,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 634 transitions. [2018-12-03 17:24:29,778 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 634 transitions. Word has length 448 [2018-12-03 17:24:29,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:24:29,779 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 634 transitions. [2018-12-03 17:24:29,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 182 states. [2018-12-03 17:24:29,779 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 634 transitions. [2018-12-03 17:24:29,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2018-12-03 17:24:29,780 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:24:29,781 INFO L402 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 90, 1, 1, 1] [2018-12-03 17:24:29,781 INFO L423 AbstractCegarLoop]: === Iteration 92 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:24:29,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:24:29,781 INFO L82 PathProgramCache]: Analyzing trace with hash 846305600, now seen corresponding path program 90 times [2018-12-03 17:24:29,781 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:24:29,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:24:29,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:24:29,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:24:29,782 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:24:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:24:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 20115 backedges. 0 proven. 20115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:24:33,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:24:33,656 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:24:33,657 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:24:33,657 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:24:33,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:24:33,657 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:24:33,667 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:24:33,667 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:24:33,779 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:24:33,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:24:33,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:24:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 20115 backedges. 0 proven. 20115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:24:40,018 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:24:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20115 backedges. 0 proven. 20115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:24:45,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:24:45,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92, 92] total 204 [2018-12-03 17:24:45,363 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:24:45,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 184 states [2018-12-03 17:24:45,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2018-12-03 17:24:45,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16815, Invalid=25005, Unknown=0, NotChecked=0, Total=41820 [2018-12-03 17:24:45,368 INFO L87 Difference]: Start difference. First operand 454 states and 634 transitions. Second operand 184 states. [2018-12-03 17:24:48,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:24:48,232 INFO L93 Difference]: Finished difference Result 465 states and 649 transitions. [2018-12-03 17:24:48,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-12-03 17:24:48,232 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 453 [2018-12-03 17:24:48,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:24:48,234 INFO L225 Difference]: With dead ends: 465 [2018-12-03 17:24:48,234 INFO L226 Difference]: Without dead ends: 463 [2018-12-03 17:24:48,235 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 723 SyntacticMatches, 70 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31927 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=16815, Invalid=25005, Unknown=0, NotChecked=0, Total=41820 [2018-12-03 17:24:48,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2018-12-03 17:24:48,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 459. [2018-12-03 17:24:48,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2018-12-03 17:24:48,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 641 transitions. [2018-12-03 17:24:48,243 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 641 transitions. Word has length 453 [2018-12-03 17:24:48,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:24:48,243 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 641 transitions. [2018-12-03 17:24:48,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 184 states. [2018-12-03 17:24:48,243 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 641 transitions. [2018-12-03 17:24:48,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2018-12-03 17:24:48,245 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:24:48,245 INFO L402 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 91, 1, 1, 1] [2018-12-03 17:24:48,246 INFO L423 AbstractCegarLoop]: === Iteration 93 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:24:48,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:24:48,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1516791537, now seen corresponding path program 91 times [2018-12-03 17:24:48,246 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:24:48,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:24:48,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:24:48,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:24:48,247 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:24:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:24:51,973 INFO L134 CoverageAnalysis]: Checked inductivity of 20566 backedges. 0 proven. 20566 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:24:51,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:24:51,973 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:24:51,974 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:24:51,974 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:24:51,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:24:51,974 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:24:51,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:24:51,982 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:24:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:24:52,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:24:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 20566 backedges. 0 proven. 20566 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:24:58,406 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:25:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20566 backedges. 0 proven. 20566 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:25:03,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:25:03,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93, 93] total 205 [2018-12-03 17:25:03,591 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:25:03,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 186 states [2018-12-03 17:25:03,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2018-12-03 17:25:03,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16929, Invalid=25301, Unknown=0, NotChecked=0, Total=42230 [2018-12-03 17:25:03,595 INFO L87 Difference]: Start difference. First operand 459 states and 641 transitions. Second operand 186 states. [2018-12-03 17:25:06,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:25:06,519 INFO L93 Difference]: Finished difference Result 470 states and 656 transitions. [2018-12-03 17:25:06,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-12-03 17:25:06,519 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 458 [2018-12-03 17:25:06,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:25:06,521 INFO L225 Difference]: With dead ends: 470 [2018-12-03 17:25:06,521 INFO L226 Difference]: Without dead ends: 468 [2018-12-03 17:25:06,522 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1007 GetRequests, 731 SyntacticMatches, 72 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32484 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=16929, Invalid=25301, Unknown=0, NotChecked=0, Total=42230 [2018-12-03 17:25:06,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2018-12-03 17:25:06,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 464. [2018-12-03 17:25:06,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2018-12-03 17:25:06,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 648 transitions. [2018-12-03 17:25:06,530 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 648 transitions. Word has length 458 [2018-12-03 17:25:06,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:25:06,530 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 648 transitions. [2018-12-03 17:25:06,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 186 states. [2018-12-03 17:25:06,530 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 648 transitions. [2018-12-03 17:25:06,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2018-12-03 17:25:06,532 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:25:06,532 INFO L402 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 92, 1, 1, 1] [2018-12-03 17:25:06,532 INFO L423 AbstractCegarLoop]: === Iteration 94 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:25:06,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:25:06,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1145864224, now seen corresponding path program 92 times [2018-12-03 17:25:06,533 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:25:06,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:25:06,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:25:06,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:25:06,533 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:25:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:25:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 21022 backedges. 0 proven. 21022 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:25:10,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:25:10,603 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:25:10,603 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:25:10,603 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:25:10,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:25:10,603 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:25:10,611 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:25:10,611 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:25:10,867 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 93 check-sat command(s) [2018-12-03 17:25:10,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:25:10,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:25:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 21022 backedges. 0 proven. 21022 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:25:17,298 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:25:22,684 INFO L134 CoverageAnalysis]: Checked inductivity of 21022 backedges. 0 proven. 21022 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:25:22,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:25:22,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94, 94] total 206 [2018-12-03 17:25:22,704 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:25:22,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 188 states [2018-12-03 17:25:22,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2018-12-03 17:25:22,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17043, Invalid=25599, Unknown=0, NotChecked=0, Total=42642 [2018-12-03 17:25:22,707 INFO L87 Difference]: Start difference. First operand 464 states and 648 transitions. Second operand 188 states. [2018-12-03 17:25:25,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:25:25,703 INFO L93 Difference]: Finished difference Result 475 states and 663 transitions. [2018-12-03 17:25:25,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-12-03 17:25:25,704 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 463 [2018-12-03 17:25:25,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:25:25,706 INFO L225 Difference]: With dead ends: 475 [2018-12-03 17:25:25,706 INFO L226 Difference]: Without dead ends: 473 [2018-12-03 17:25:25,707 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1018 GetRequests, 739 SyntacticMatches, 74 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33041 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=17043, Invalid=25599, Unknown=0, NotChecked=0, Total=42642 [2018-12-03 17:25:25,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2018-12-03 17:25:25,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 469. [2018-12-03 17:25:25,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2018-12-03 17:25:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 655 transitions. [2018-12-03 17:25:25,715 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 655 transitions. Word has length 463 [2018-12-03 17:25:25,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:25:25,716 INFO L480 AbstractCegarLoop]: Abstraction has 469 states and 655 transitions. [2018-12-03 17:25:25,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 188 states. [2018-12-03 17:25:25,716 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 655 transitions. [2018-12-03 17:25:25,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2018-12-03 17:25:25,718 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:25:25,718 INFO L402 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 93, 1, 1, 1] [2018-12-03 17:25:25,718 INFO L423 AbstractCegarLoop]: === Iteration 95 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:25:25,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:25:25,718 INFO L82 PathProgramCache]: Analyzing trace with hash -43146159, now seen corresponding path program 93 times [2018-12-03 17:25:25,718 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:25:25,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:25:25,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:25:25,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:25:25,719 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:25:25,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:25:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 21483 backedges. 0 proven. 21483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:25:29,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:25:29,979 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:25:29,979 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:25:29,979 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:25:29,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:25:29,979 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:25:29,987 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:25:29,987 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:25:30,113 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:25:30,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:25:30,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:25:36,843 INFO L134 CoverageAnalysis]: Checked inductivity of 21483 backedges. 0 proven. 21483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:25:36,844 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:25:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 21483 backedges. 0 proven. 21483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:25:42,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:25:42,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 207 [2018-12-03 17:25:42,200 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:25:42,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 190 states [2018-12-03 17:25:42,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2018-12-03 17:25:42,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17157, Invalid=25899, Unknown=0, NotChecked=0, Total=43056 [2018-12-03 17:25:42,204 INFO L87 Difference]: Start difference. First operand 469 states and 655 transitions. Second operand 190 states. [2018-12-03 17:25:45,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:25:45,055 INFO L93 Difference]: Finished difference Result 480 states and 670 transitions. [2018-12-03 17:25:45,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-12-03 17:25:45,055 INFO L78 Accepts]: Start accepts. Automaton has 190 states. Word has length 468 [2018-12-03 17:25:45,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:25:45,057 INFO L225 Difference]: With dead ends: 480 [2018-12-03 17:25:45,057 INFO L226 Difference]: Without dead ends: 478 [2018-12-03 17:25:45,058 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1029 GetRequests, 747 SyntacticMatches, 76 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33598 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=17157, Invalid=25899, Unknown=0, NotChecked=0, Total=43056 [2018-12-03 17:25:45,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2018-12-03 17:25:45,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 474. [2018-12-03 17:25:45,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 474 states. [2018-12-03 17:25:45,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 662 transitions. [2018-12-03 17:25:45,067 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 662 transitions. Word has length 468 [2018-12-03 17:25:45,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:25:45,067 INFO L480 AbstractCegarLoop]: Abstraction has 474 states and 662 transitions. [2018-12-03 17:25:45,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 190 states. [2018-12-03 17:25:45,068 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 662 transitions. [2018-12-03 17:25:45,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2018-12-03 17:25:45,069 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:25:45,070 INFO L402 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 1, 1, 1] [2018-12-03 17:25:45,070 INFO L423 AbstractCegarLoop]: === Iteration 96 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:25:45,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:25:45,070 INFO L82 PathProgramCache]: Analyzing trace with hash -281174400, now seen corresponding path program 94 times [2018-12-03 17:25:45,070 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:25:45,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:25:45,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:25:45,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:25:45,071 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:25:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:25:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 21949 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:25:49,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:25:49,058 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:25:49,059 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:25:49,059 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:25:49,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:25:49,059 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 17:25:49,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:25:49,069 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:25:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:25:49,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:25:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 21949 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:25:55,831 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:26:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 21949 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:26:01,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:26:01,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 208 [2018-12-03 17:26:01,217 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:26:01,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2018-12-03 17:26:01,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2018-12-03 17:26:01,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17271, Invalid=26201, Unknown=0, NotChecked=0, Total=43472 [2018-12-03 17:26:01,221 INFO L87 Difference]: Start difference. First operand 474 states and 662 transitions. Second operand 192 states. [2018-12-03 17:26:04,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:26:04,480 INFO L93 Difference]: Finished difference Result 485 states and 677 transitions. [2018-12-03 17:26:04,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-12-03 17:26:04,481 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 473 [2018-12-03 17:26:04,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:26:04,483 INFO L225 Difference]: With dead ends: 485 [2018-12-03 17:26:04,483 INFO L226 Difference]: Without dead ends: 483 [2018-12-03 17:26:04,484 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1040 GetRequests, 755 SyntacticMatches, 78 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34155 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=17271, Invalid=26201, Unknown=0, NotChecked=0, Total=43472 [2018-12-03 17:26:04,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2018-12-03 17:26:04,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 479. [2018-12-03 17:26:04,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-12-03 17:26:04,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 669 transitions. [2018-12-03 17:26:04,492 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 669 transitions. Word has length 473 [2018-12-03 17:26:04,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:26:04,493 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 669 transitions. [2018-12-03 17:26:04,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 192 states. [2018-12-03 17:26:04,493 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 669 transitions. [2018-12-03 17:26:04,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2018-12-03 17:26:04,495 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:26:04,495 INFO L402 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 1, 1, 1] [2018-12-03 17:26:04,495 INFO L423 AbstractCegarLoop]: === Iteration 97 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:26:04,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:26:04,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1299338831, now seen corresponding path program 95 times [2018-12-03 17:26:04,495 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:26:04,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:26:04,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:26:04,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:26:04,496 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:26:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat