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_oct.epf -i ../../../trunk/examples/programs/real-life/GateController.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 18:33:51,486 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 18:33:51,488 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 18:33:51,500 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 18:33:51,501 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 18:33:51,502 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 18:33:51,503 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 18:33:51,505 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 18:33:51,507 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 18:33:51,508 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 18:33:51,509 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-12-03 18:33:51,535 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf [2018-12-03 18:33:51,548 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 18:33:51,548 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 18:33:51,549 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 18:33:51,550 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 18:33:51,550 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 18:33:51,550 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 18:33:51,550 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 18:33:51,550 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 18:33:51,551 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 18:33:51,551 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2018-12-03 18:33:51,551 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 18:33:51,551 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 18:33:51,551 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 18:33:51,552 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 18:33:51,552 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 18:33:51,553 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 18:33:51,553 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 18:33:51,553 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 18:33:51,553 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 18:33:51,553 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 18:33:51,554 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 18:33:51,554 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 18:33:51,554 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 18:33:51,554 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 18:33:51,554 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 18:33:51,555 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 18:33:51,555 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 18:33:51,555 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 18:33:51,555 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 18:33:51,555 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 18:33:51,556 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 18:33:51,556 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 18:33:51,556 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 18:33:51,556 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 18:33:51,556 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 18:33:51,557 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 18:33:51,557 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 18:33:51,557 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 18:33:51,557 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 18:33:51,557 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 18:33:51,588 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 18:33:51,602 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 18:33:51,605 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 18:33:51,608 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 18:33:51,609 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 18:33:51,610 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/GateController.bpl [2018-12-03 18:33:51,610 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/GateController.bpl' [2018-12-03 18:33:51,653 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 18:33:51,655 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 18:33:51,656 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 18:33:51,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 18:33:51,656 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 18:33:51,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 06:33:51" (1/1) ... [2018-12-03 18:33:51,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 06:33:51" (1/1) ... [2018-12-03 18:33:51,697 WARN L165 Inliner]: Program contained no entry procedure! [2018-12-03 18:33:51,697 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-12-03 18:33:51,697 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-12-03 18:33:51,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 18:33:51,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 18:33:51,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 18:33:51,702 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 18:33:51,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 06:33:51" (1/1) ... [2018-12-03 18:33:51,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 06:33:51" (1/1) ... [2018-12-03 18:33:51,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 06:33:51" (1/1) ... [2018-12-03 18:33:51,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 06:33:51" (1/1) ... [2018-12-03 18:33:51,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 06:33:51" (1/1) ... [2018-12-03 18:33:51,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 06:33:51" (1/1) ... [2018-12-03 18:33:51,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 06:33:51" (1/1) ... [2018-12-03 18:33:51,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 18:33:51,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 18:33:51,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 18:33:51,730 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 18:33:51,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 06:33:51" (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 18:33:51,808 INFO L124 BoogieDeclarations]: Specification and implementation of procedure GateController given in one single declaration [2018-12-03 18:33:51,808 INFO L130 BoogieDeclarations]: Found specification of procedure GateController [2018-12-03 18:33:51,808 INFO L138 BoogieDeclarations]: Found implementation of procedure GateController [2018-12-03 18:33:52,135 INFO L272 CfgBuilder]: Using library mode [2018-12-03 18:33:52,136 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-03 18:33:52,137 INFO L202 PluginConnector]: Adding new model GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:33:52 BoogieIcfgContainer [2018-12-03 18:33:52,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 18:33:52,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 18:33:52,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 18:33:52,143 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 18:33:52,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 06:33:51" (1/2) ... [2018-12-03 18:33:52,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2494d345 and model type GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 06:33:52, skipping insertion in model container [2018-12-03 18:33:52,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:33:52" (2/2) ... [2018-12-03 18:33:52,148 INFO L112 eAbstractionObserver]: Analyzing ICFG GateController.bpl [2018-12-03 18:33:52,161 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 18:33:52,171 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 18:33:52,191 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 18:33:52,236 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 18:33:52,236 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 18:33:52,236 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 18:33:52,236 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 18:33:52,237 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 18:33:52,237 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 18:33:52,237 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 18:33:52,237 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 18:33:52,253 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-12-03 18:33:52,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-03 18:33:52,261 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:33:52,262 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-03 18:33:52,264 INFO L423 AbstractCegarLoop]: === Iteration 1 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:33:52,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:33:52,271 INFO L82 PathProgramCache]: Analyzing trace with hash 30432, now seen corresponding path program 1 times [2018-12-03 18:33:52,274 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:33:52,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:33:52,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:33:52,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:33:52,330 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:33:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:33:52,423 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 18:33:52,425 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 18:33:52,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 18:33:52,426 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 18:33:52,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 18:33:52,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 18:33:52,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 18:33:52,446 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-12-03 18:33:52,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:33:52,508 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2018-12-03 18:33:52,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 18:33:52,509 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-03 18:33:52,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:33:52,520 INFO L225 Difference]: With dead ends: 19 [2018-12-03 18:33:52,521 INFO L226 Difference]: Without dead ends: 13 [2018-12-03 18:33:52,525 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 18:33:52,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-03 18:33:52,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 9. [2018-12-03 18:33:52,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-03 18:33:52,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2018-12-03 18:33:52,556 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 3 [2018-12-03 18:33:52,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:33:52,556 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2018-12-03 18:33:52,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 18:33:52,557 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2018-12-03 18:33:52,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-03 18:33:52,557 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:33:52,558 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 18:33:52,558 INFO L423 AbstractCegarLoop]: === Iteration 2 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:33:52,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:33:52,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1953617644, now seen corresponding path program 1 times [2018-12-03 18:33:52,559 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:33:52,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:33:52,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:33:52,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:33:52,561 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:33:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:33:52,839 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 18:33:52,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:33:52,840 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:33:52,841 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 9 with the following transitions: [2018-12-03 18:33:52,843 INFO L205 CegarAbsIntRunner]: [0], [4], [7], [11], [16], [18], [20], [21] [2018-12-03 18:33:52,939 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 18:33:52,939 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 18:33:53,464 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 18:33:53,466 INFO L272 AbstractInterpreter]: Visited 8 different actions 109 times. Merged at 7 different actions 92 times. Widened at 1 different actions 12 times. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-03 18:33:53,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:33:53,486 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 18:33:53,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:33:53,486 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 18:33:53,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:33:53,501 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:33:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:33:53,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:33:53,731 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 18:33:53,732 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:33:53,870 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 18:33:53,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:33:53,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2018-12-03 18:33:53,905 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:33:53,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 18:33:53,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 18:33:53,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-12-03 18:33:53,908 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 8 states. [2018-12-03 18:33:54,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:33:54,022 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2018-12-03 18:33:54,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 18:33:54,025 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-12-03 18:33:54,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:33:54,026 INFO L225 Difference]: With dead ends: 21 [2018-12-03 18:33:54,026 INFO L226 Difference]: Without dead ends: 19 [2018-12-03 18:33:54,029 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-12-03 18:33:54,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-03 18:33:54,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2018-12-03 18:33:54,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-03 18:33:54,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2018-12-03 18:33:54,036 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2018-12-03 18:33:54,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:33:54,038 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2018-12-03 18:33:54,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 18:33:54,038 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2018-12-03 18:33:54,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-03 18:33:54,039 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:33:54,039 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 18:33:54,041 INFO L423 AbstractCegarLoop]: === Iteration 3 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:33:54,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:33:54,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1953558062, now seen corresponding path program 1 times [2018-12-03 18:33:54,041 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:33:54,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:33:54,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:33:54,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:33:54,043 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:33:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:33:54,103 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 18:33:54,104 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 18:33:54,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 18:33:54,104 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 18:33:54,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 18:33:54,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 18:33:54,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 18:33:54,105 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand 3 states. [2018-12-03 18:33:54,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:33:54,135 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2018-12-03 18:33:54,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 18:33:54,137 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-12-03 18:33:54,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:33:54,138 INFO L225 Difference]: With dead ends: 21 [2018-12-03 18:33:54,138 INFO L226 Difference]: Without dead ends: 14 [2018-12-03 18:33:54,139 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 18:33:54,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-12-03 18:33:54,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-12-03 18:33:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-03 18:33:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-12-03 18:33:54,144 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2018-12-03 18:33:54,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:33:54,144 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-12-03 18:33:54,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 18:33:54,144 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-12-03 18:33:54,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-03 18:33:54,145 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:33:54,145 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1] [2018-12-03 18:33:54,146 INFO L423 AbstractCegarLoop]: === Iteration 4 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:33:54,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:33:54,146 INFO L82 PathProgramCache]: Analyzing trace with hash 72785504, now seen corresponding path program 2 times [2018-12-03 18:33:54,146 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:33:54,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:33:54,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:33:54,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:33:54,148 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:33:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:33:54,453 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 18:33:54,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:33:54,453 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:33:54,453 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:33:54,454 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:33:54,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:33:54,454 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 18:33:54,466 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 18:33:54,466 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 18:33:54,491 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-03 18:33:54,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:33:54,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:33:54,857 WARN L180 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-12-03 18:33:54,953 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 18:33:54,954 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:33:55,095 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 18:33:55,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:33:55,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2018-12-03 18:33:55,116 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:33:55,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-03 18:33:55,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-03 18:33:55,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2018-12-03 18:33:55,118 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 12 states. [2018-12-03 18:33:55,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:33:55,192 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2018-12-03 18:33:55,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-03 18:33:55,192 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2018-12-03 18:33:55,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:33:55,193 INFO L225 Difference]: With dead ends: 25 [2018-12-03 18:33:55,193 INFO L226 Difference]: Without dead ends: 23 [2018-12-03 18:33:55,194 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2018-12-03 18:33:55,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-03 18:33:55,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-12-03 18:33:55,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-03 18:33:55,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2018-12-03 18:33:55,200 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2018-12-03 18:33:55,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:33:55,201 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2018-12-03 18:33:55,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-03 18:33:55,201 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2018-12-03 18:33:55,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-03 18:33:55,202 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:33:55,202 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1] [2018-12-03 18:33:55,202 INFO L423 AbstractCegarLoop]: === Iteration 5 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:33:55,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:33:55,203 INFO L82 PathProgramCache]: Analyzing trace with hash 491282284, now seen corresponding path program 3 times [2018-12-03 18:33:55,203 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:33:55,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:33:55,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:33:55,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:33:55,205 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:33:55,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:33:55,416 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 18:33:55,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:33:55,418 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:33:55,418 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:33:55,418 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:33:55,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:33:55,418 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 18:33:55,435 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 18:33:55,436 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 18:33:55,479 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 18:33:55,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:33:55,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:33:56,011 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 18:33:56,012 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:33:56,152 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 18:33:56,171 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:33:56,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2018-12-03 18:33:56,171 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:33:56,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-03 18:33:56,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-03 18:33:56,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2018-12-03 18:33:56,174 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 16 states. [2018-12-03 18:33:56,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:33:56,272 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2018-12-03 18:33:56,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-03 18:33:56,274 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-12-03 18:33:56,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:33:56,275 INFO L225 Difference]: With dead ends: 30 [2018-12-03 18:33:56,275 INFO L226 Difference]: Without dead ends: 28 [2018-12-03 18:33:56,276 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2018-12-03 18:33:56,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-03 18:33:56,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2018-12-03 18:33:56,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-03 18:33:56,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-12-03 18:33:56,281 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 18 [2018-12-03 18:33:56,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:33:56,281 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-12-03 18:33:56,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-03 18:33:56,282 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-12-03 18:33:56,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-03 18:33:56,282 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:33:56,283 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1] [2018-12-03 18:33:56,283 INFO L423 AbstractCegarLoop]: === Iteration 6 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:33:56,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:33:56,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1589732832, now seen corresponding path program 4 times [2018-12-03 18:33:56,284 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:33:56,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:33:56,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:33:56,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:33:56,285 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:33:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:33:56,439 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 18:33:56,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:33:56,439 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:33:56,440 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:33:56,440 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:33:56,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:33:56,440 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 18:33:56,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:33:56,450 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:33:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:33:56,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:33:56,856 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 18:33:56,856 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:33:57,027 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 18:33:57,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:33:57,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2018-12-03 18:33:57,047 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:33:57,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-03 18:33:57,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-03 18:33:57,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2018-12-03 18:33:57,049 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 20 states. [2018-12-03 18:33:57,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:33:57,423 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-12-03 18:33:57,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-03 18:33:57,424 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2018-12-03 18:33:57,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:33:57,425 INFO L225 Difference]: With dead ends: 35 [2018-12-03 18:33:57,425 INFO L226 Difference]: Without dead ends: 33 [2018-12-03 18:33:57,426 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2018-12-03 18:33:57,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-03 18:33:57,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2018-12-03 18:33:57,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-03 18:33:57,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2018-12-03 18:33:57,431 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 23 [2018-12-03 18:33:57,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:33:57,431 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2018-12-03 18:33:57,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-03 18:33:57,432 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2018-12-03 18:33:57,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-03 18:33:57,432 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:33:57,432 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1] [2018-12-03 18:33:57,433 INFO L423 AbstractCegarLoop]: === Iteration 7 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:33:57,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:33:57,433 INFO L82 PathProgramCache]: Analyzing trace with hash 602818540, now seen corresponding path program 5 times [2018-12-03 18:33:57,433 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:33:57,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:33:57,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:33:57,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:33:57,434 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:33:57,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:33:57,780 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 18:33:57,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:33:57,780 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:33:57,780 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:33:57,781 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:33:57,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:33:57,781 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 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 18:33:57,789 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 18:33:57,789 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 18:33:57,804 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-03 18:33:57,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:33:57,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:33:58,031 WARN L180 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-12-03 18:33:58,295 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 18:33:58,295 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:33:58,470 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 18:33:58,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:33:58,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2018-12-03 18:33:58,493 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:33:58,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-03 18:33:58,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-03 18:33:58,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=820, Unknown=0, NotChecked=0, Total=1190 [2018-12-03 18:33:58,494 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 24 states. [2018-12-03 18:33:58,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:33:58,619 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2018-12-03 18:33:58,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-03 18:33:58,620 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2018-12-03 18:33:58,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:33:58,621 INFO L225 Difference]: With dead ends: 40 [2018-12-03 18:33:58,622 INFO L226 Difference]: Without dead ends: 38 [2018-12-03 18:33:58,623 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=370, Invalid=820, Unknown=0, NotChecked=0, Total=1190 [2018-12-03 18:33:58,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-03 18:33:58,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2018-12-03 18:33:58,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-03 18:33:58,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2018-12-03 18:33:58,629 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 28 [2018-12-03 18:33:58,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:33:58,629 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2018-12-03 18:33:58,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-03 18:33:58,630 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2018-12-03 18:33:58,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-03 18:33:58,631 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:33:58,631 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1] [2018-12-03 18:33:58,631 INFO L423 AbstractCegarLoop]: === Iteration 8 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:33:58,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:33:58,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1979239776, now seen corresponding path program 6 times [2018-12-03 18:33:58,631 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:33:58,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:33:58,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:33:58,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:33:58,633 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:33:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:33:58,981 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 18:33:58,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:33:58,982 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:33:58,983 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:33:58,983 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:33:58,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:33:58,983 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 18:33:59,000 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 18:33:59,000 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 18:33:59,019 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 18:33:59,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:33:59,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:33:59,441 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 18:33:59,442 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:34:00,098 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 18:34:00,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:34:00,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2018-12-03 18:34:00,118 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:34:00,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-12-03 18:34:00,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-12-03 18:34:00,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=1138, Unknown=0, NotChecked=0, Total=1640 [2018-12-03 18:34:00,123 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 28 states. [2018-12-03 18:34:00,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:34:00,245 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2018-12-03 18:34:00,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-03 18:34:00,247 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 33 [2018-12-03 18:34:00,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:34:00,248 INFO L225 Difference]: With dead ends: 45 [2018-12-03 18:34:00,248 INFO L226 Difference]: Without dead ends: 43 [2018-12-03 18:34:00,249 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=502, Invalid=1138, Unknown=0, NotChecked=0, Total=1640 [2018-12-03 18:34:00,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-03 18:34:00,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-12-03 18:34:00,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-03 18:34:00,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2018-12-03 18:34:00,255 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 33 [2018-12-03 18:34:00,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:34:00,255 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2018-12-03 18:34:00,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-12-03 18:34:00,255 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2018-12-03 18:34:00,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-03 18:34:00,256 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:34:00,256 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1] [2018-12-03 18:34:00,257 INFO L423 AbstractCegarLoop]: === Iteration 9 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:34:00,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:34:00,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1800695700, now seen corresponding path program 7 times [2018-12-03 18:34:00,257 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:34:00,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:00,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:34:00,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:00,259 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:34:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:00,459 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 18:34:00,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:00,459 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:34:00,459 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:34:00,460 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:34:00,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:00,460 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 18:34:00,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:34:00,469 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:34:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:00,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:34:00,961 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 18:34:00,962 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:34:01,291 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 18:34:01,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:34:01,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2018-12-03 18:34:01,310 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:34:01,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-12-03 18:34:01,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-12-03 18:34:01,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=654, Invalid=1508, Unknown=0, NotChecked=0, Total=2162 [2018-12-03 18:34:01,313 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 32 states. [2018-12-03 18:34:01,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:34:01,465 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2018-12-03 18:34:01,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-03 18:34:01,466 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 38 [2018-12-03 18:34:01,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:34:01,467 INFO L225 Difference]: With dead ends: 50 [2018-12-03 18:34:01,468 INFO L226 Difference]: Without dead ends: 48 [2018-12-03 18:34:01,469 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=654, Invalid=1508, Unknown=0, NotChecked=0, Total=2162 [2018-12-03 18:34:01,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-03 18:34:01,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2018-12-03 18:34:01,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-03 18:34:01,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2018-12-03 18:34:01,475 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 38 [2018-12-03 18:34:01,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:34:01,476 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2018-12-03 18:34:01,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-12-03 18:34:01,476 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2018-12-03 18:34:01,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-03 18:34:01,477 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:34:01,477 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1] [2018-12-03 18:34:01,478 INFO L423 AbstractCegarLoop]: === Iteration 10 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:34:01,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:34:01,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1430989600, now seen corresponding path program 8 times [2018-12-03 18:34:01,478 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:34:01,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:01,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:34:01,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:01,479 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:34:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:01,753 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 18:34:01,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:01,754 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:34:01,754 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:34:01,754 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:34:01,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:01,754 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 18:34:01,765 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 18:34:01,765 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 18:34:01,791 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-03 18:34:01,791 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:34:01,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:34:02,276 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 18:34:02,277 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:34:04,019 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 18:34:04,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:34:04,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2018-12-03 18:34:04,040 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:34:04,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-03 18:34:04,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-03 18:34:04,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1930, Unknown=0, NotChecked=0, Total=2756 [2018-12-03 18:34:04,042 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 36 states. [2018-12-03 18:34:04,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:34:04,431 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2018-12-03 18:34:04,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-03 18:34:04,433 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2018-12-03 18:34:04,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:34:04,434 INFO L225 Difference]: With dead ends: 55 [2018-12-03 18:34:04,434 INFO L226 Difference]: Without dead ends: 53 [2018-12-03 18:34:04,436 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=826, Invalid=1930, Unknown=0, NotChecked=0, Total=2756 [2018-12-03 18:34:04,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-03 18:34:04,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2018-12-03 18:34:04,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-03 18:34:04,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2018-12-03 18:34:04,442 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 43 [2018-12-03 18:34:04,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:34:04,443 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2018-12-03 18:34:04,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-03 18:34:04,443 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2018-12-03 18:34:04,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-12-03 18:34:04,444 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:34:04,444 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1] [2018-12-03 18:34:04,445 INFO L423 AbstractCegarLoop]: === Iteration 11 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:34:04,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:34:04,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1043842836, now seen corresponding path program 9 times [2018-12-03 18:34:04,445 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:34:04,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:04,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:34:04,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:04,447 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:34:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:04,803 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 18:34:04,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:04,803 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:34:04,804 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:34:04,804 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:34:04,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:04,804 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 18:34:04,814 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 18:34:04,814 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 18:34:04,827 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 18:34:04,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:34:04,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:34:05,644 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 18:34:05,644 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:34:06,540 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 18:34:06,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:34:06,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2018-12-03 18:34:06,562 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:34:06,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-12-03 18:34:06,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-12-03 18:34:06,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1018, Invalid=2404, Unknown=0, NotChecked=0, Total=3422 [2018-12-03 18:34:06,564 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 40 states. [2018-12-03 18:34:06,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:34:06,712 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2018-12-03 18:34:06,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-03 18:34:06,712 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2018-12-03 18:34:06,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:34:06,714 INFO L225 Difference]: With dead ends: 60 [2018-12-03 18:34:06,714 INFO L226 Difference]: Without dead ends: 58 [2018-12-03 18:34:06,716 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1018, Invalid=2404, Unknown=0, NotChecked=0, Total=3422 [2018-12-03 18:34:06,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-03 18:34:06,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2018-12-03 18:34:06,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-12-03 18:34:06,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2018-12-03 18:34:06,722 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 48 [2018-12-03 18:34:06,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:34:06,722 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2018-12-03 18:34:06,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-12-03 18:34:06,722 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2018-12-03 18:34:06,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-03 18:34:06,723 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:34:06,723 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1] [2018-12-03 18:34:06,724 INFO L423 AbstractCegarLoop]: === Iteration 12 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:34:06,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:34:06,724 INFO L82 PathProgramCache]: Analyzing trace with hash -676496288, now seen corresponding path program 10 times [2018-12-03 18:34:06,724 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:34:06,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:06,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:34:06,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:06,725 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:34:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:07,222 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 18:34:07,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:07,222 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:34:07,223 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:34:07,223 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:34:07,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:07,223 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 18:34:07,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:34:07,239 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:34:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:07,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:34:08,171 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 18:34:08,171 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:34:08,616 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 18:34:08,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:34:08,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 64 [2018-12-03 18:34:08,636 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:34:08,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-12-03 18:34:08,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-12-03 18:34:08,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=2930, Unknown=0, NotChecked=0, Total=4160 [2018-12-03 18:34:08,640 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 44 states. [2018-12-03 18:34:08,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:34:08,834 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2018-12-03 18:34:08,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-03 18:34:08,834 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 53 [2018-12-03 18:34:08,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:34:08,835 INFO L225 Difference]: With dead ends: 65 [2018-12-03 18:34:08,835 INFO L226 Difference]: Without dead ends: 63 [2018-12-03 18:34:08,837 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2215 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1230, Invalid=2930, Unknown=0, NotChecked=0, Total=4160 [2018-12-03 18:34:08,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-03 18:34:08,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-12-03 18:34:08,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-03 18:34:08,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2018-12-03 18:34:08,843 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 53 [2018-12-03 18:34:08,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:34:08,844 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2018-12-03 18:34:08,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-12-03 18:34:08,844 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2018-12-03 18:34:08,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-12-03 18:34:08,845 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:34:08,845 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1] [2018-12-03 18:34:08,845 INFO L423 AbstractCegarLoop]: === Iteration 13 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:34:08,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:34:08,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1014218388, now seen corresponding path program 11 times [2018-12-03 18:34:08,846 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:34:08,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:08,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:34:08,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:08,847 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:34:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:09,187 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 18:34:09,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:09,187 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:34:09,187 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:34:09,187 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:34:09,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:09,188 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:34:09,204 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 18:34:09,204 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 18:34:09,227 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-12-03 18:34:09,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:34:09,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:34:10,041 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 18:34:10,041 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:34:10,933 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 18:34:10,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:34:10,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2018-12-03 18:34:10,957 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:34:10,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-12-03 18:34:10,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-12-03 18:34:10,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1462, Invalid=3508, Unknown=0, NotChecked=0, Total=4970 [2018-12-03 18:34:10,959 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 48 states. [2018-12-03 18:34:11,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:34:11,200 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2018-12-03 18:34:11,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-03 18:34:11,201 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 58 [2018-12-03 18:34:11,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:34:11,202 INFO L225 Difference]: With dead ends: 70 [2018-12-03 18:34:11,202 INFO L226 Difference]: Without dead ends: 68 [2018-12-03 18:34:11,205 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2673 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1462, Invalid=3508, Unknown=0, NotChecked=0, Total=4970 [2018-12-03 18:34:11,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-03 18:34:11,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2018-12-03 18:34:11,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-03 18:34:11,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2018-12-03 18:34:11,211 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 58 [2018-12-03 18:34:11,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:34:11,212 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2018-12-03 18:34:11,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-12-03 18:34:11,212 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2018-12-03 18:34:11,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-03 18:34:11,213 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:34:11,213 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1] [2018-12-03 18:34:11,213 INFO L423 AbstractCegarLoop]: === Iteration 14 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:34:11,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:34:11,214 INFO L82 PathProgramCache]: Analyzing trace with hash -778386464, now seen corresponding path program 12 times [2018-12-03 18:34:11,214 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:34:11,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:11,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:34:11,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:11,215 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:34:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:11,709 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 18:34:11,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:11,710 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:34:11,710 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:34:11,710 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:34:11,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:11,710 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 18:34:11,720 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 18:34:11,721 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 18:34:11,736 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 18:34:11,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:34:11,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:34:12,527 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 18:34:12,528 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:34:13,154 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 18:34:13,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:34:13,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 76 [2018-12-03 18:34:13,173 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:34:13,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-12-03 18:34:13,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-12-03 18:34:13,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1714, Invalid=4138, Unknown=0, NotChecked=0, Total=5852 [2018-12-03 18:34:13,176 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 52 states. [2018-12-03 18:34:13,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:34:13,428 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2018-12-03 18:34:13,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-12-03 18:34:13,428 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 63 [2018-12-03 18:34:13,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:34:13,430 INFO L225 Difference]: With dead ends: 75 [2018-12-03 18:34:13,430 INFO L226 Difference]: Without dead ends: 73 [2018-12-03 18:34:13,432 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3174 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1714, Invalid=4138, Unknown=0, NotChecked=0, Total=5852 [2018-12-03 18:34:13,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-12-03 18:34:13,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2018-12-03 18:34:13,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-12-03 18:34:13,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2018-12-03 18:34:13,438 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 63 [2018-12-03 18:34:13,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:34:13,438 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2018-12-03 18:34:13,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-12-03 18:34:13,438 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2018-12-03 18:34:13,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-12-03 18:34:13,440 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:34:13,440 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1] [2018-12-03 18:34:13,440 INFO L423 AbstractCegarLoop]: === Iteration 15 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:34:13,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:34:13,440 INFO L82 PathProgramCache]: Analyzing trace with hash -130045460, now seen corresponding path program 13 times [2018-12-03 18:34:13,440 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:34:13,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:13,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:34:13,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:13,442 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:34:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:13,802 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 18:34:13,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:13,802 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:34:13,803 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:34:13,803 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:34:13,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:13,803 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 18:34:13,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:34:13,812 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:34:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:13,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:34:14,524 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 18:34:14,525 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:34:15,429 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 18:34:15,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:34:15,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 82 [2018-12-03 18:34:15,449 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:34:15,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-12-03 18:34:15,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-12-03 18:34:15,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1986, Invalid=4820, Unknown=0, NotChecked=0, Total=6806 [2018-12-03 18:34:15,452 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 56 states. [2018-12-03 18:34:15,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:34:15,692 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2018-12-03 18:34:15,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-03 18:34:15,693 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 68 [2018-12-03 18:34:15,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:34:15,693 INFO L225 Difference]: With dead ends: 80 [2018-12-03 18:34:15,694 INFO L226 Difference]: Without dead ends: 78 [2018-12-03 18:34:15,696 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3718 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1986, Invalid=4820, Unknown=0, NotChecked=0, Total=6806 [2018-12-03 18:34:15,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-12-03 18:34:15,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2018-12-03 18:34:15,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-12-03 18:34:15,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2018-12-03 18:34:15,703 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 68 [2018-12-03 18:34:15,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:34:15,704 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2018-12-03 18:34:15,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-12-03 18:34:15,704 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2018-12-03 18:34:15,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-03 18:34:15,705 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:34:15,705 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1] [2018-12-03 18:34:15,705 INFO L423 AbstractCegarLoop]: === Iteration 16 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:34:15,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:34:15,706 INFO L82 PathProgramCache]: Analyzing trace with hash -415978656, now seen corresponding path program 14 times [2018-12-03 18:34:15,706 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:34:15,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:15,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:34:15,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:15,707 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:34:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:16,276 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 18:34:16,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:16,277 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:34:16,277 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:34:16,277 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:34:16,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:16,277 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 18:34:16,287 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 18:34:16,287 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 18:34:16,319 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-12-03 18:34:16,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:34:16,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:34:17,138 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 18:34:17,138 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:34:18,181 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 18:34:18,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:34:18,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 88 [2018-12-03 18:34:18,201 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:34:18,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-12-03 18:34:18,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-12-03 18:34:18,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=5554, Unknown=0, NotChecked=0, Total=7832 [2018-12-03 18:34:18,204 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 60 states. [2018-12-03 18:34:18,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:34:18,435 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2018-12-03 18:34:18,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-03 18:34:18,436 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 73 [2018-12-03 18:34:18,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:34:18,436 INFO L225 Difference]: With dead ends: 85 [2018-12-03 18:34:18,436 INFO L226 Difference]: Without dead ends: 83 [2018-12-03 18:34:18,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4305 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2278, Invalid=5554, Unknown=0, NotChecked=0, Total=7832 [2018-12-03 18:34:18,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-12-03 18:34:18,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-12-03 18:34:18,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-12-03 18:34:18,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2018-12-03 18:34:18,443 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 73 [2018-12-03 18:34:18,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:34:18,443 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2018-12-03 18:34:18,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-12-03 18:34:18,443 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2018-12-03 18:34:18,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-12-03 18:34:18,445 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:34:18,445 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1] [2018-12-03 18:34:18,445 INFO L423 AbstractCegarLoop]: === Iteration 17 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:34:18,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:34:18,445 INFO L82 PathProgramCache]: Analyzing trace with hash -2077592980, now seen corresponding path program 15 times [2018-12-03 18:34:18,445 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:34:18,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:18,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:34:18,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:18,447 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:34:18,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:19,123 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 18:34:19,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:19,124 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:34:19,124 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:34:19,124 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:34:19,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:19,124 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 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 18:34:19,134 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 18:34:19,134 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 18:34:19,154 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 18:34:19,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:34:19,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:34:20,004 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 18:34:20,005 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:34:21,197 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 18:34:21,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:34:21,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 94 [2018-12-03 18:34:21,217 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:34:21,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-12-03 18:34:21,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-12-03 18:34:21,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2590, Invalid=6340, Unknown=0, NotChecked=0, Total=8930 [2018-12-03 18:34:21,219 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 64 states. [2018-12-03 18:34:21,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:34:21,672 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2018-12-03 18:34:21,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-03 18:34:21,674 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 78 [2018-12-03 18:34:21,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:34:21,675 INFO L225 Difference]: With dead ends: 90 [2018-12-03 18:34:21,675 INFO L226 Difference]: Without dead ends: 88 [2018-12-03 18:34:21,677 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4935 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2590, Invalid=6340, Unknown=0, NotChecked=0, Total=8930 [2018-12-03 18:34:21,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-12-03 18:34:21,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2018-12-03 18:34:21,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-12-03 18:34:21,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2018-12-03 18:34:21,683 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 78 [2018-12-03 18:34:21,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:34:21,684 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2018-12-03 18:34:21,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-12-03 18:34:21,684 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2018-12-03 18:34:21,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-12-03 18:34:21,685 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:34:21,685 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1] [2018-12-03 18:34:21,685 INFO L423 AbstractCegarLoop]: === Iteration 18 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:34:21,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:34:21,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1630745312, now seen corresponding path program 16 times [2018-12-03 18:34:21,693 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:34:21,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:21,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:34:21,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:21,694 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:34:21,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:22,305 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 18:34:22,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:22,305 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:34:22,305 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:34:22,305 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:34:22,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:22,314 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 18:34:22,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:34:22,324 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:34:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:22,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:34:23,345 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 18:34:23,345 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:34:24,307 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 18:34:24,326 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:34:24,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 100 [2018-12-03 18:34:24,326 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:34:24,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-12-03 18:34:24,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-12-03 18:34:24,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2922, Invalid=7178, Unknown=0, NotChecked=0, Total=10100 [2018-12-03 18:34:24,328 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 68 states. [2018-12-03 18:34:24,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:34:24,749 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2018-12-03 18:34:24,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-12-03 18:34:24,750 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 83 [2018-12-03 18:34:24,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:34:24,750 INFO L225 Difference]: With dead ends: 95 [2018-12-03 18:34:24,750 INFO L226 Difference]: Without dead ends: 93 [2018-12-03 18:34:24,754 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5608 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2922, Invalid=7178, Unknown=0, NotChecked=0, Total=10100 [2018-12-03 18:34:24,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-12-03 18:34:24,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2018-12-03 18:34:24,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-03 18:34:24,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2018-12-03 18:34:24,766 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 83 [2018-12-03 18:34:24,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:34:24,766 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2018-12-03 18:34:24,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-12-03 18:34:24,766 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2018-12-03 18:34:24,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-12-03 18:34:24,771 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:34:24,771 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1] [2018-12-03 18:34:24,772 INFO L423 AbstractCegarLoop]: === Iteration 19 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:34:24,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:34:24,773 INFO L82 PathProgramCache]: Analyzing trace with hash -778790164, now seen corresponding path program 17 times [2018-12-03 18:34:24,773 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:34:24,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:24,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:34:24,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:24,774 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:34:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:25,990 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 18:34:25,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:25,990 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:34:25,991 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:34:25,991 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:34:25,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:25,991 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 18:34:26,001 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 18:34:26,001 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 18:34:26,026 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-12-03 18:34:26,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:34:26,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:34:27,127 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 18:34:27,127 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:34:28,431 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 18:34:28,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:34:28,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 106 [2018-12-03 18:34:28,461 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:34:28,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-12-03 18:34:28,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-12-03 18:34:28,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3274, Invalid=8068, Unknown=0, NotChecked=0, Total=11342 [2018-12-03 18:34:28,463 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand 72 states. [2018-12-03 18:34:28,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:34:28,737 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2018-12-03 18:34:28,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-12-03 18:34:28,738 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 88 [2018-12-03 18:34:28,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:34:28,739 INFO L225 Difference]: With dead ends: 100 [2018-12-03 18:34:28,739 INFO L226 Difference]: Without dead ends: 98 [2018-12-03 18:34:28,740 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6324 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3274, Invalid=8068, Unknown=0, NotChecked=0, Total=11342 [2018-12-03 18:34:28,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-12-03 18:34:28,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2018-12-03 18:34:28,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-12-03 18:34:28,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2018-12-03 18:34:28,744 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 88 [2018-12-03 18:34:28,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:34:28,745 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2018-12-03 18:34:28,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-12-03 18:34:28,745 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2018-12-03 18:34:28,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-12-03 18:34:28,746 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:34:28,746 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1] [2018-12-03 18:34:28,746 INFO L423 AbstractCegarLoop]: === Iteration 20 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:34:28,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:34:28,746 INFO L82 PathProgramCache]: Analyzing trace with hash 38689376, now seen corresponding path program 18 times [2018-12-03 18:34:28,747 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:34:28,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:28,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:34:28,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:28,748 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:34:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:29,342 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 18:34:29,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:29,343 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:34:29,343 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:34:29,343 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:34:29,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:29,344 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:34:29,360 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 18:34:29,361 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 18:34:29,411 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 18:34:29,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:34:29,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:34:30,532 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 18:34:30,532 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:34:31,950 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 18:34:31,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:34:31,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 112 [2018-12-03 18:34:31,969 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:34:31,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-12-03 18:34:31,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-12-03 18:34:31,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3646, Invalid=9010, Unknown=0, NotChecked=0, Total=12656 [2018-12-03 18:34:31,971 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand 76 states. [2018-12-03 18:34:32,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:34:32,280 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2018-12-03 18:34:32,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-12-03 18:34:32,281 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 93 [2018-12-03 18:34:32,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:34:32,282 INFO L225 Difference]: With dead ends: 105 [2018-12-03 18:34:32,282 INFO L226 Difference]: Without dead ends: 103 [2018-12-03 18:34:32,283 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7083 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3646, Invalid=9010, Unknown=0, NotChecked=0, Total=12656 [2018-12-03 18:34:32,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-12-03 18:34:32,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-12-03 18:34:32,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-12-03 18:34:32,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2018-12-03 18:34:32,286 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 93 [2018-12-03 18:34:32,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:34:32,287 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2018-12-03 18:34:32,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-12-03 18:34:32,287 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2018-12-03 18:34:32,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-12-03 18:34:32,288 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:34:32,288 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1] [2018-12-03 18:34:32,288 INFO L423 AbstractCegarLoop]: === Iteration 21 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:34:32,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:34:32,288 INFO L82 PathProgramCache]: Analyzing trace with hash 281420652, now seen corresponding path program 19 times [2018-12-03 18:34:32,288 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:34:32,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:32,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:34:32,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:32,289 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:34:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:33,217 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 18:34:33,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:33,218 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:34:33,218 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:34:33,218 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:34:33,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:33,218 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:34:33,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:34:33,235 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:34:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:33,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:34:34,396 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 18:34:34,396 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:34:36,069 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 18:34:36,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:34:36,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 118 [2018-12-03 18:34:36,088 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:34:36,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-12-03 18:34:36,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-12-03 18:34:36,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4038, Invalid=10004, Unknown=0, NotChecked=0, Total=14042 [2018-12-03 18:34:36,090 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand 80 states. [2018-12-03 18:34:36,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:34:36,406 INFO L93 Difference]: Finished difference Result 110 states and 131 transitions. [2018-12-03 18:34:36,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-12-03 18:34:36,407 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 98 [2018-12-03 18:34:36,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:34:36,408 INFO L225 Difference]: With dead ends: 110 [2018-12-03 18:34:36,408 INFO L226 Difference]: Without dead ends: 108 [2018-12-03 18:34:36,409 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7885 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4038, Invalid=10004, Unknown=0, NotChecked=0, Total=14042 [2018-12-03 18:34:36,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-12-03 18:34:36,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2018-12-03 18:34:36,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-12-03 18:34:36,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2018-12-03 18:34:36,414 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 98 [2018-12-03 18:34:36,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:34:36,414 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2018-12-03 18:34:36,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-12-03 18:34:36,414 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2018-12-03 18:34:36,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-12-03 18:34:36,415 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:34:36,415 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1] [2018-12-03 18:34:36,415 INFO L423 AbstractCegarLoop]: === Iteration 22 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:34:36,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:34:36,416 INFO L82 PathProgramCache]: Analyzing trace with hash -2025971232, now seen corresponding path program 20 times [2018-12-03 18:34:36,416 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:34:36,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:36,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:34:36,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:36,417 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:34:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:37,090 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 18:34:37,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:37,090 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:34:37,090 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:34:37,090 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:34:37,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:37,091 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 18:34:37,100 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 18:34:37,101 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 18:34:37,131 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-12-03 18:34:37,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:34:37,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:34:39,584 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 18:34:39,584 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:34:41,542 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 18:34:41,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:34:41,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 124 [2018-12-03 18:34:41,561 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:34:41,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-12-03 18:34:41,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-12-03 18:34:41,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4450, Invalid=11050, Unknown=0, NotChecked=0, Total=15500 [2018-12-03 18:34:41,562 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand 84 states. [2018-12-03 18:34:41,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:34:41,908 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2018-12-03 18:34:41,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-12-03 18:34:41,911 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 103 [2018-12-03 18:34:41,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:34:41,911 INFO L225 Difference]: With dead ends: 115 [2018-12-03 18:34:41,911 INFO L226 Difference]: Without dead ends: 113 [2018-12-03 18:34:41,912 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8730 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4450, Invalid=11050, Unknown=0, NotChecked=0, Total=15500 [2018-12-03 18:34:41,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-12-03 18:34:41,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2018-12-03 18:34:41,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-12-03 18:34:41,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2018-12-03 18:34:41,920 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 103 [2018-12-03 18:34:41,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:34:41,920 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2018-12-03 18:34:41,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-12-03 18:34:41,920 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2018-12-03 18:34:41,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-12-03 18:34:41,920 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:34:41,921 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1] [2018-12-03 18:34:41,921 INFO L423 AbstractCegarLoop]: === Iteration 23 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:34:41,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:34:41,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1207497748, now seen corresponding path program 21 times [2018-12-03 18:34:41,921 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:34:41,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:41,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:34:41,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:41,922 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:34:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:42,751 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 18:34:42,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:42,752 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:34:42,752 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:34:42,752 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:34:42,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:42,752 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 18:34:42,760 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 18:34:42,761 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 18:34:42,784 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 18:34:42,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:34:42,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:34:44,053 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 18:34:44,053 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:34:45,680 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 18:34:45,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:34:45,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 130 [2018-12-03 18:34:45,699 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:34:45,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-12-03 18:34:45,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-12-03 18:34:45,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4882, Invalid=12148, Unknown=0, NotChecked=0, Total=17030 [2018-12-03 18:34:45,702 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand 88 states. [2018-12-03 18:34:46,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:34:46,199 INFO L93 Difference]: Finished difference Result 120 states and 143 transitions. [2018-12-03 18:34:46,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-12-03 18:34:46,200 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 108 [2018-12-03 18:34:46,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:34:46,201 INFO L225 Difference]: With dead ends: 120 [2018-12-03 18:34:46,201 INFO L226 Difference]: Without dead ends: 118 [2018-12-03 18:34:46,202 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9618 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4882, Invalid=12148, Unknown=0, NotChecked=0, Total=17030 [2018-12-03 18:34:46,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-12-03 18:34:46,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2018-12-03 18:34:46,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-12-03 18:34:46,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2018-12-03 18:34:46,207 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 108 [2018-12-03 18:34:46,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:34:46,208 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2018-12-03 18:34:46,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-12-03 18:34:46,208 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2018-12-03 18:34:46,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-12-03 18:34:46,209 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:34:46,209 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1] [2018-12-03 18:34:46,209 INFO L423 AbstractCegarLoop]: === Iteration 24 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:34:46,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:34:46,209 INFO L82 PathProgramCache]: Analyzing trace with hash 649759072, now seen corresponding path program 22 times [2018-12-03 18:34:46,209 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:34:46,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:46,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:34:46,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:46,210 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:34:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:47,298 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 18:34:47,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:47,298 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:34:47,298 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:34:47,298 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:34:47,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:47,299 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 18:34:47,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:34:47,307 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:34:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:47,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:34:48,864 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 18:34:48,864 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:34:50,614 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 18:34:50,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:34:50,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 136 [2018-12-03 18:34:50,636 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:34:50,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-12-03 18:34:50,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-12-03 18:34:50,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5334, Invalid=13298, Unknown=0, NotChecked=0, Total=18632 [2018-12-03 18:34:50,639 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand 92 states. [2018-12-03 18:34:51,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:34:51,070 INFO L93 Difference]: Finished difference Result 125 states and 149 transitions. [2018-12-03 18:34:51,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-12-03 18:34:51,070 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 113 [2018-12-03 18:34:51,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:34:51,071 INFO L225 Difference]: With dead ends: 125 [2018-12-03 18:34:51,071 INFO L226 Difference]: Without dead ends: 123 [2018-12-03 18:34:51,073 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10549 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5334, Invalid=13298, Unknown=0, NotChecked=0, Total=18632 [2018-12-03 18:34:51,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-12-03 18:34:51,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-12-03 18:34:51,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-12-03 18:34:51,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2018-12-03 18:34:51,078 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 113 [2018-12-03 18:34:51,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:34:51,079 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2018-12-03 18:34:51,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-12-03 18:34:51,079 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2018-12-03 18:34:51,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-12-03 18:34:51,080 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:34:51,080 INFO L402 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1] [2018-12-03 18:34:51,080 INFO L423 AbstractCegarLoop]: === Iteration 25 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:34:51,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:34:51,080 INFO L82 PathProgramCache]: Analyzing trace with hash 60773484, now seen corresponding path program 23 times [2018-12-03 18:34:51,081 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:34:51,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:51,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:34:51,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:51,082 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:34:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:52,037 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 18:34:52,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:52,038 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:34:52,038 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:34:52,038 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:34:52,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:52,038 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 18:34:52,047 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 18:34:52,047 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 18:34:52,087 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-12-03 18:34:52,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:34:52,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:34:53,708 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 18:34:53,708 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:34:55,644 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 18:34:55,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:34:55,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 142 [2018-12-03 18:34:55,663 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:34:55,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-12-03 18:34:55,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-12-03 18:34:55,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5806, Invalid=14500, Unknown=0, NotChecked=0, Total=20306 [2018-12-03 18:34:55,665 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand 96 states. [2018-12-03 18:34:56,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:34:56,212 INFO L93 Difference]: Finished difference Result 130 states and 155 transitions. [2018-12-03 18:34:56,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-12-03 18:34:56,212 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 118 [2018-12-03 18:34:56,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:34:56,213 INFO L225 Difference]: With dead ends: 130 [2018-12-03 18:34:56,213 INFO L226 Difference]: Without dead ends: 128 [2018-12-03 18:34:56,214 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11523 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5806, Invalid=14500, Unknown=0, NotChecked=0, Total=20306 [2018-12-03 18:34:56,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-12-03 18:34:56,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2018-12-03 18:34:56,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-12-03 18:34:56,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2018-12-03 18:34:56,218 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 118 [2018-12-03 18:34:56,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:34:56,218 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2018-12-03 18:34:56,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-12-03 18:34:56,218 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2018-12-03 18:34:56,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-12-03 18:34:56,219 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:34:56,219 INFO L402 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1] [2018-12-03 18:34:56,219 INFO L423 AbstractCegarLoop]: === Iteration 26 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:34:56,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:34:56,219 INFO L82 PathProgramCache]: Analyzing trace with hash 293310688, now seen corresponding path program 24 times [2018-12-03 18:34:56,220 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:34:56,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:56,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:34:56,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:34:56,220 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:34:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:34:57,266 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 18:34:57,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:57,266 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:34:57,267 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:34:57,267 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:34:57,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:34:57,267 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 18:34:57,275 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 18:34:57,276 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 18:34:57,302 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 18:34:57,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:34:57,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:34:59,183 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 18:34:59,184 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:35:01,496 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 18:35:01,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:35:01,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 148 [2018-12-03 18:35:01,515 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:35:01,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-12-03 18:35:01,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-12-03 18:35:01,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6298, Invalid=15754, Unknown=0, NotChecked=0, Total=22052 [2018-12-03 18:35:01,517 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand 100 states. [2018-12-03 18:35:02,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:35:02,217 INFO L93 Difference]: Finished difference Result 135 states and 161 transitions. [2018-12-03 18:35:02,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-12-03 18:35:02,217 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 123 [2018-12-03 18:35:02,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:35:02,218 INFO L225 Difference]: With dead ends: 135 [2018-12-03 18:35:02,218 INFO L226 Difference]: Without dead ends: 133 [2018-12-03 18:35:02,219 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12540 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6298, Invalid=15754, Unknown=0, NotChecked=0, Total=22052 [2018-12-03 18:35:02,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-12-03 18:35:02,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2018-12-03 18:35:02,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-12-03 18:35:02,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2018-12-03 18:35:02,225 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 123 [2018-12-03 18:35:02,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:35:02,225 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2018-12-03 18:35:02,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-12-03 18:35:02,225 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2018-12-03 18:35:02,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-12-03 18:35:02,225 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:35:02,226 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1] [2018-12-03 18:35:02,226 INFO L423 AbstractCegarLoop]: === Iteration 27 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:35:02,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:35:02,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1977023724, now seen corresponding path program 25 times [2018-12-03 18:35:02,226 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:35:02,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:35:02,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:35:02,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:35:02,227 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:35:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:35:03,351 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 18:35:03,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:35:03,351 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:35:03,352 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:35:03,352 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:35:03,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:35:03,352 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 18:35:03,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:35:03,360 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:35:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:35:03,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:35:05,196 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 18:35:05,197 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:35:07,841 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 18:35:07,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:35:07,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 154 [2018-12-03 18:35:07,860 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:35:07,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-12-03 18:35:07,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-12-03 18:35:07,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6810, Invalid=17060, Unknown=0, NotChecked=0, Total=23870 [2018-12-03 18:35:07,864 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand 104 states. [2018-12-03 18:35:08,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:35:08,280 INFO L93 Difference]: Finished difference Result 140 states and 167 transitions. [2018-12-03 18:35:08,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-12-03 18:35:08,280 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 128 [2018-12-03 18:35:08,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:35:08,281 INFO L225 Difference]: With dead ends: 140 [2018-12-03 18:35:08,281 INFO L226 Difference]: Without dead ends: 138 [2018-12-03 18:35:08,282 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13600 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=6810, Invalid=17060, Unknown=0, NotChecked=0, Total=23870 [2018-12-03 18:35:08,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-12-03 18:35:08,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2018-12-03 18:35:08,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-12-03 18:35:08,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 160 transitions. [2018-12-03 18:35:08,287 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 160 transitions. Word has length 128 [2018-12-03 18:35:08,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:35:08,288 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 160 transitions. [2018-12-03 18:35:08,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-12-03 18:35:08,288 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 160 transitions. [2018-12-03 18:35:08,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-12-03 18:35:08,289 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:35:08,289 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1] [2018-12-03 18:35:08,289 INFO L423 AbstractCegarLoop]: === Iteration 28 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:35:08,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:35:08,290 INFO L82 PathProgramCache]: Analyzing trace with hash -231131040, now seen corresponding path program 26 times [2018-12-03 18:35:08,290 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:35:08,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:35:08,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:35:08,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:35:08,291 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:35:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:35:09,636 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 18:35:09,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:35:09,636 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:35:09,637 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:35:09,637 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:35:09,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:35:09,637 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 18:35:09,645 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 18:35:09,645 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 18:35:09,686 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-12-03 18:35:09,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:35:09,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:35:12,000 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 18:35:12,000 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:35:14,686 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 18:35:14,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:35:14,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 160 [2018-12-03 18:35:14,705 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:35:14,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-12-03 18:35:14,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-12-03 18:35:14,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7342, Invalid=18418, Unknown=0, NotChecked=0, Total=25760 [2018-12-03 18:35:14,707 INFO L87 Difference]: Start difference. First operand 134 states and 160 transitions. Second operand 108 states. [2018-12-03 18:35:15,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:35:15,588 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2018-12-03 18:35:15,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-12-03 18:35:15,588 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 133 [2018-12-03 18:35:15,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:35:15,589 INFO L225 Difference]: With dead ends: 145 [2018-12-03 18:35:15,589 INFO L226 Difference]: Without dead ends: 143 [2018-12-03 18:35:15,590 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14703 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=7342, Invalid=18418, Unknown=0, NotChecked=0, Total=25760 [2018-12-03 18:35:15,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-12-03 18:35:15,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-12-03 18:35:15,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-12-03 18:35:15,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2018-12-03 18:35:15,594 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 133 [2018-12-03 18:35:15,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:35:15,595 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2018-12-03 18:35:15,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-12-03 18:35:15,595 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2018-12-03 18:35:15,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-12-03 18:35:15,595 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:35:15,595 INFO L402 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1] [2018-12-03 18:35:15,595 INFO L423 AbstractCegarLoop]: === Iteration 29 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:35:15,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:35:15,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1458963820, now seen corresponding path program 27 times [2018-12-03 18:35:15,596 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:35:15,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:35:15,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:35:15,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:35:15,596 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:35:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:35:16,994 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 18:35:16,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:35:16,994 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:35:16,995 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:35:16,995 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:35:16,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:35:16,995 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 18:35:17,006 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 18:35:17,006 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 18:35:17,039 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 18:35:17,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:35:17,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:35:19,065 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 18:35:19,065 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:35:22,140 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 18:35:22,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:35:22,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 166 [2018-12-03 18:35:22,159 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:35:22,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-12-03 18:35:22,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-12-03 18:35:22,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7894, Invalid=19828, Unknown=0, NotChecked=0, Total=27722 [2018-12-03 18:35:22,160 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand 112 states. [2018-12-03 18:35:22,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:35:22,725 INFO L93 Difference]: Finished difference Result 150 states and 179 transitions. [2018-12-03 18:35:22,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-12-03 18:35:22,725 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 138 [2018-12-03 18:35:22,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:35:22,726 INFO L225 Difference]: With dead ends: 150 [2018-12-03 18:35:22,726 INFO L226 Difference]: Without dead ends: 148 [2018-12-03 18:35:22,727 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15849 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=7894, Invalid=19828, Unknown=0, NotChecked=0, Total=27722 [2018-12-03 18:35:22,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-12-03 18:35:22,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2018-12-03 18:35:22,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-12-03 18:35:22,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 172 transitions. [2018-12-03 18:35:22,733 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 172 transitions. Word has length 138 [2018-12-03 18:35:22,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:35:22,734 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 172 transitions. [2018-12-03 18:35:22,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-12-03 18:35:22,734 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 172 transitions. [2018-12-03 18:35:22,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-12-03 18:35:22,735 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:35:22,735 INFO L402 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1] [2018-12-03 18:35:22,735 INFO L423 AbstractCegarLoop]: === Iteration 30 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:35:22,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:35:22,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1839955936, now seen corresponding path program 28 times [2018-12-03 18:35:22,736 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:35:22,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:35:22,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:35:22,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:35:22,737 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:35:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:35:24,045 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 18:35:24,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:35:24,046 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:35:24,046 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:35:24,046 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:35:24,046 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:35:24,046 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 18:35:24,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:35:24,055 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:35:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:35:24,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:35:26,231 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 18:35:26,231 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:35:29,309 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 18:35:29,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:35:29,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 172 [2018-12-03 18:35:29,328 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:35:29,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-12-03 18:35:29,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-12-03 18:35:29,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8466, Invalid=21290, Unknown=0, NotChecked=0, Total=29756 [2018-12-03 18:35:29,330 INFO L87 Difference]: Start difference. First operand 144 states and 172 transitions. Second operand 116 states. [2018-12-03 18:35:29,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:35:29,908 INFO L93 Difference]: Finished difference Result 155 states and 185 transitions. [2018-12-03 18:35:29,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-12-03 18:35:29,908 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 143 [2018-12-03 18:35:29,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:35:29,909 INFO L225 Difference]: With dead ends: 155 [2018-12-03 18:35:29,909 INFO L226 Difference]: Without dead ends: 153 [2018-12-03 18:35:29,911 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17038 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=8466, Invalid=21290, Unknown=0, NotChecked=0, Total=29756 [2018-12-03 18:35:29,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-12-03 18:35:29,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2018-12-03 18:35:29,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-12-03 18:35:29,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 178 transitions. [2018-12-03 18:35:29,917 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 178 transitions. Word has length 143 [2018-12-03 18:35:29,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:35:29,917 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 178 transitions. [2018-12-03 18:35:29,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-12-03 18:35:29,917 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 178 transitions. [2018-12-03 18:35:29,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-12-03 18:35:29,918 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:35:29,918 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1] [2018-12-03 18:35:29,918 INFO L423 AbstractCegarLoop]: === Iteration 31 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:35:29,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:35:29,919 INFO L82 PathProgramCache]: Analyzing trace with hash 893677036, now seen corresponding path program 29 times [2018-12-03 18:35:29,919 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:35:29,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:35:29,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:35:29,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:35:29,920 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:35:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:35:31,924 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 18:35:31,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:35:31,924 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:35:31,924 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:35:31,925 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:35:31,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:35:31,925 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 18:35:31,934 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 18:35:31,934 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 18:35:32,013 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-12-03 18:35:32,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:35:32,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:35:34,462 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 18:35:34,462 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:35:38,063 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 18:35:38,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:35:38,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 178 [2018-12-03 18:35:38,081 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:35:38,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-12-03 18:35:38,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-12-03 18:35:38,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9058, Invalid=22804, Unknown=0, NotChecked=0, Total=31862 [2018-12-03 18:35:38,084 INFO L87 Difference]: Start difference. First operand 149 states and 178 transitions. Second operand 120 states. [2018-12-03 18:35:38,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:35:38,916 INFO L93 Difference]: Finished difference Result 160 states and 191 transitions. [2018-12-03 18:35:38,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-12-03 18:35:38,917 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 148 [2018-12-03 18:35:38,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:35:38,918 INFO L225 Difference]: With dead ends: 160 [2018-12-03 18:35:38,918 INFO L226 Difference]: Without dead ends: 158 [2018-12-03 18:35:38,920 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18270 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=9058, Invalid=22804, Unknown=0, NotChecked=0, Total=31862 [2018-12-03 18:35:38,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-12-03 18:35:38,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2018-12-03 18:35:38,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-12-03 18:35:38,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 184 transitions. [2018-12-03 18:35:38,926 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 184 transitions. Word has length 148 [2018-12-03 18:35:38,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:35:38,926 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 184 transitions. [2018-12-03 18:35:38,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-12-03 18:35:38,926 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 184 transitions. [2018-12-03 18:35:38,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-12-03 18:35:38,927 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:35:38,927 INFO L402 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1] [2018-12-03 18:35:38,927 INFO L423 AbstractCegarLoop]: === Iteration 32 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:35:38,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:35:38,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1567987872, now seen corresponding path program 30 times [2018-12-03 18:35:38,928 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:35:38,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:35:38,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:35:38,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:35:38,929 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:35:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:35:40,322 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 18:35:40,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:35:40,322 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:35:40,322 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:35:40,322 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:35:40,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:35:40,322 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 18:35:40,331 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 18:35:40,332 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 18:35:40,363 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 18:35:40,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:35:40,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:35:43,027 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 18:35:43,027 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:35:46,305 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 18:35:46,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:35:46,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 184 [2018-12-03 18:35:46,324 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:35:46,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-12-03 18:35:46,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-12-03 18:35:46,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9670, Invalid=24370, Unknown=0, NotChecked=0, Total=34040 [2018-12-03 18:35:46,327 INFO L87 Difference]: Start difference. First operand 154 states and 184 transitions. Second operand 124 states. [2018-12-03 18:35:46,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:35:46,990 INFO L93 Difference]: Finished difference Result 165 states and 197 transitions. [2018-12-03 18:35:46,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-12-03 18:35:46,990 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 153 [2018-12-03 18:35:46,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:35:46,992 INFO L225 Difference]: With dead ends: 165 [2018-12-03 18:35:46,992 INFO L226 Difference]: Without dead ends: 163 [2018-12-03 18:35:46,993 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19545 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=9670, Invalid=24370, Unknown=0, NotChecked=0, Total=34040 [2018-12-03 18:35:46,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-12-03 18:35:46,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-12-03 18:35:46,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-12-03 18:35:46,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 190 transitions. [2018-12-03 18:35:46,999 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 190 transitions. Word has length 153 [2018-12-03 18:35:47,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:35:47,000 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 190 transitions. [2018-12-03 18:35:47,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-12-03 18:35:47,000 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 190 transitions. [2018-12-03 18:35:47,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-12-03 18:35:47,001 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:35:47,001 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1] [2018-12-03 18:35:47,001 INFO L423 AbstractCegarLoop]: === Iteration 33 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:35:47,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:35:47,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1695168108, now seen corresponding path program 31 times [2018-12-03 18:35:47,002 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:35:47,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:35:47,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:35:47,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:35:47,003 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:35:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:35:49,954 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 18:35:49,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:35:49,954 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:35:49,955 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:35:49,955 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:35:49,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:35:49,955 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 18:35:49,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:35:49,964 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:35:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:35:50,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:35:52,851 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 18:35:52,851 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:35:56,323 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 18:35:56,341 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:35:56,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 190 [2018-12-03 18:35:56,342 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:35:56,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-12-03 18:35:56,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-12-03 18:35:56,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10302, Invalid=25988, Unknown=0, NotChecked=0, Total=36290 [2018-12-03 18:35:56,345 INFO L87 Difference]: Start difference. First operand 159 states and 190 transitions. Second operand 128 states. [2018-12-03 18:35:57,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:35:57,039 INFO L93 Difference]: Finished difference Result 170 states and 203 transitions. [2018-12-03 18:35:57,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-12-03 18:35:57,039 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 158 [2018-12-03 18:35:57,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:35:57,040 INFO L225 Difference]: With dead ends: 170 [2018-12-03 18:35:57,040 INFO L226 Difference]: Without dead ends: 168 [2018-12-03 18:35:57,042 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20863 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=10302, Invalid=25988, Unknown=0, NotChecked=0, Total=36290 [2018-12-03 18:35:57,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-12-03 18:35:57,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2018-12-03 18:35:57,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-12-03 18:35:57,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 196 transitions. [2018-12-03 18:35:57,049 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 196 transitions. Word has length 158 [2018-12-03 18:35:57,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:35:57,049 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 196 transitions. [2018-12-03 18:35:57,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-12-03 18:35:57,049 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 196 transitions. [2018-12-03 18:35:57,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-12-03 18:35:57,050 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:35:57,050 INFO L402 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1] [2018-12-03 18:35:57,050 INFO L423 AbstractCegarLoop]: === Iteration 34 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:35:57,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:35:57,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1450316064, now seen corresponding path program 32 times [2018-12-03 18:35:57,051 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:35:57,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:35:57,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:35:57,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:35:57,052 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:35:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:35:58,951 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 18:35:58,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:35:58,951 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:35:58,952 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:35:58,952 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:35:58,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:35:58,952 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 18:35:58,961 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 18:35:58,961 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 18:35:59,038 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-12-03 18:35:59,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:35:59,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:36:01,726 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 18:36:01,726 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:36:05,665 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 18:36:05,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:36:05,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 196 [2018-12-03 18:36:05,686 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:36:05,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-12-03 18:36:05,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-12-03 18:36:05,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10954, Invalid=27658, Unknown=0, NotChecked=0, Total=38612 [2018-12-03 18:36:05,690 INFO L87 Difference]: Start difference. First operand 164 states and 196 transitions. Second operand 132 states. [2018-12-03 18:36:06,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:36:06,430 INFO L93 Difference]: Finished difference Result 175 states and 209 transitions. [2018-12-03 18:36:06,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-12-03 18:36:06,431 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 163 [2018-12-03 18:36:06,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:36:06,432 INFO L225 Difference]: With dead ends: 175 [2018-12-03 18:36:06,432 INFO L226 Difference]: Without dead ends: 173 [2018-12-03 18:36:06,434 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22224 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=10954, Invalid=27658, Unknown=0, NotChecked=0, Total=38612 [2018-12-03 18:36:06,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-12-03 18:36:06,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2018-12-03 18:36:06,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-12-03 18:36:06,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 202 transitions. [2018-12-03 18:36:06,440 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 202 transitions. Word has length 163 [2018-12-03 18:36:06,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:36:06,441 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 202 transitions. [2018-12-03 18:36:06,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-12-03 18:36:06,441 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 202 transitions. [2018-12-03 18:36:06,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-12-03 18:36:06,442 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:36:06,442 INFO L402 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1] [2018-12-03 18:36:06,442 INFO L423 AbstractCegarLoop]: === Iteration 35 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:36:06,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:36:06,443 INFO L82 PathProgramCache]: Analyzing trace with hash -2138087700, now seen corresponding path program 33 times [2018-12-03 18:36:06,443 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:36:06,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:36:06,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:36:06,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:36:06,444 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:36:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:36:08,790 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 18:36:08,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:36:08,790 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:36:08,790 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:36:08,790 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:36:08,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:36:08,790 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 18:36:08,799 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 18:36:08,799 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 18:36:08,837 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 18:36:08,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:36:08,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:36:11,757 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 18:36:11,757 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:36:15,895 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 18:36:15,925 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:36:15,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 202 [2018-12-03 18:36:15,925 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:36:15,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-12-03 18:36:15,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-12-03 18:36:15,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11626, Invalid=29380, Unknown=0, NotChecked=0, Total=41006 [2018-12-03 18:36:15,929 INFO L87 Difference]: Start difference. First operand 169 states and 202 transitions. Second operand 136 states. [2018-12-03 18:36:16,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:36:16,772 INFO L93 Difference]: Finished difference Result 180 states and 215 transitions. [2018-12-03 18:36:16,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-12-03 18:36:16,772 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 168 [2018-12-03 18:36:16,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:36:16,773 INFO L225 Difference]: With dead ends: 180 [2018-12-03 18:36:16,773 INFO L226 Difference]: Without dead ends: 178 [2018-12-03 18:36:16,775 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23628 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=11626, Invalid=29380, Unknown=0, NotChecked=0, Total=41006 [2018-12-03 18:36:16,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-12-03 18:36:16,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2018-12-03 18:36:16,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-12-03 18:36:16,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 208 transitions. [2018-12-03 18:36:16,782 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 208 transitions. Word has length 168 [2018-12-03 18:36:16,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:36:16,782 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 208 transitions. [2018-12-03 18:36:16,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-12-03 18:36:16,782 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 208 transitions. [2018-12-03 18:36:16,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-12-03 18:36:16,783 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:36:16,783 INFO L402 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1] [2018-12-03 18:36:16,784 INFO L423 AbstractCegarLoop]: === Iteration 36 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:36:16,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:36:16,784 INFO L82 PathProgramCache]: Analyzing trace with hash 359536224, now seen corresponding path program 34 times [2018-12-03 18:36:16,784 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:36:16,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:36:16,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:36:16,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:36:16,785 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:36:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:36:19,201 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 18:36:19,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:36:19,201 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:36:19,201 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:36:19,201 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:36:19,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:36:19,202 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 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 18:36:19,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:36:19,209 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:36:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:36:19,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:36:23,277 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 18:36:23,277 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:36:27,439 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 18:36:27,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:36:27,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 208 [2018-12-03 18:36:27,467 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:36:27,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-12-03 18:36:27,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-12-03 18:36:27,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12318, Invalid=31154, Unknown=0, NotChecked=0, Total=43472 [2018-12-03 18:36:27,472 INFO L87 Difference]: Start difference. First operand 174 states and 208 transitions. Second operand 140 states. [2018-12-03 18:36:28,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:36:28,572 INFO L93 Difference]: Finished difference Result 185 states and 221 transitions. [2018-12-03 18:36:28,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-12-03 18:36:28,573 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 173 [2018-12-03 18:36:28,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:36:28,576 INFO L225 Difference]: With dead ends: 185 [2018-12-03 18:36:28,576 INFO L226 Difference]: Without dead ends: 183 [2018-12-03 18:36:28,578 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25075 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=12318, Invalid=31154, Unknown=0, NotChecked=0, Total=43472 [2018-12-03 18:36:28,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-12-03 18:36:28,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-12-03 18:36:28,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-12-03 18:36:28,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 214 transitions. [2018-12-03 18:36:28,585 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 214 transitions. Word has length 173 [2018-12-03 18:36:28,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:36:28,585 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 214 transitions. [2018-12-03 18:36:28,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-12-03 18:36:28,585 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 214 transitions. [2018-12-03 18:36:28,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-12-03 18:36:28,586 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:36:28,586 INFO L402 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1] [2018-12-03 18:36:28,587 INFO L423 AbstractCegarLoop]: === Iteration 37 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:36:28,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:36:28,587 INFO L82 PathProgramCache]: Analyzing trace with hash -400824468, now seen corresponding path program 35 times [2018-12-03 18:36:28,587 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:36:28,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:36:28,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:36:28,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:36:28,588 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:36:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:36:32,102 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 18:36:32,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:36:32,102 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:36:32,102 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:36:32,102 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:36:32,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:36:32,103 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 18:36:32,110 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 18:36:32,111 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 18:36:32,227 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-12-03 18:36:32,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:36:32,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:36:36,104 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 18:36:36,104 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:36:40,684 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 18:36:40,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:36:40,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 214 [2018-12-03 18:36:40,703 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:36:40,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-12-03 18:36:40,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-12-03 18:36:40,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13030, Invalid=32980, Unknown=0, NotChecked=0, Total=46010 [2018-12-03 18:36:40,706 INFO L87 Difference]: Start difference. First operand 179 states and 214 transitions. Second operand 144 states. [2018-12-03 18:36:41,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:36:41,622 INFO L93 Difference]: Finished difference Result 190 states and 227 transitions. [2018-12-03 18:36:41,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-12-03 18:36:41,623 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 178 [2018-12-03 18:36:41,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:36:41,624 INFO L225 Difference]: With dead ends: 190 [2018-12-03 18:36:41,624 INFO L226 Difference]: Without dead ends: 188 [2018-12-03 18:36:41,625 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26565 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=13030, Invalid=32980, Unknown=0, NotChecked=0, Total=46010 [2018-12-03 18:36:41,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-12-03 18:36:41,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2018-12-03 18:36:41,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-12-03 18:36:41,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2018-12-03 18:36:41,632 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 178 [2018-12-03 18:36:41,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:36:41,632 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2018-12-03 18:36:41,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-12-03 18:36:41,632 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2018-12-03 18:36:41,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-12-03 18:36:41,633 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:36:41,633 INFO L402 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1] [2018-12-03 18:36:41,634 INFO L423 AbstractCegarLoop]: === Iteration 38 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:36:41,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:36:41,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1927470560, now seen corresponding path program 36 times [2018-12-03 18:36:41,634 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:36:41,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:36:41,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:36:41,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:36:41,635 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:36:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:36:44,015 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 18:36:44,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:36:44,015 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:36:44,015 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:36:44,016 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:36:44,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:36:44,016 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 18:36:44,025 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 18:36:44,025 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 18:36:44,065 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 18:36:44,065 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:36:44,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:36:47,507 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 18:36:47,507 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:36:52,243 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 18:36:52,283 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:36:52,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 220 [2018-12-03 18:36:52,283 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:36:52,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-12-03 18:36:52,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-12-03 18:36:52,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13762, Invalid=34858, Unknown=0, NotChecked=0, Total=48620 [2018-12-03 18:36:52,286 INFO L87 Difference]: Start difference. First operand 184 states and 220 transitions. Second operand 148 states. [2018-12-03 18:36:53,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:36:53,306 INFO L93 Difference]: Finished difference Result 195 states and 233 transitions. [2018-12-03 18:36:53,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-12-03 18:36:53,306 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 183 [2018-12-03 18:36:53,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:36:53,307 INFO L225 Difference]: With dead ends: 195 [2018-12-03 18:36:53,307 INFO L226 Difference]: Without dead ends: 193 [2018-12-03 18:36:53,309 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28098 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=13762, Invalid=34858, Unknown=0, NotChecked=0, Total=48620 [2018-12-03 18:36:53,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-12-03 18:36:53,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2018-12-03 18:36:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-12-03 18:36:53,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 226 transitions. [2018-12-03 18:36:53,315 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 226 transitions. Word has length 183 [2018-12-03 18:36:53,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:36:53,315 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 226 transitions. [2018-12-03 18:36:53,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-12-03 18:36:53,316 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 226 transitions. [2018-12-03 18:36:53,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-12-03 18:36:53,317 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:36:53,317 INFO L402 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1] [2018-12-03 18:36:53,317 INFO L423 AbstractCegarLoop]: === Iteration 39 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:36:53,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:36:53,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1106759660, now seen corresponding path program 37 times [2018-12-03 18:36:53,317 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:36:53,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:36:53,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:36:53,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:36:53,318 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:36:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:36:56,619 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 18:36:56,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:36:56,620 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:36:56,620 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:36:56,620 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:36:56,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:36:56,620 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 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 18:36:56,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:36:56,631 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:36:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:36:56,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:37:00,603 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 18:37:00,603 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:37:05,567 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 18:37:05,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:37:05,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 226 [2018-12-03 18:37:05,587 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:37:05,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-12-03 18:37:05,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-12-03 18:37:05,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14514, Invalid=36788, Unknown=0, NotChecked=0, Total=51302 [2018-12-03 18:37:05,591 INFO L87 Difference]: Start difference. First operand 189 states and 226 transitions. Second operand 152 states. [2018-12-03 18:37:06,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:37:06,709 INFO L93 Difference]: Finished difference Result 200 states and 239 transitions. [2018-12-03 18:37:06,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-12-03 18:37:06,710 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 188 [2018-12-03 18:37:06,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:37:06,711 INFO L225 Difference]: With dead ends: 200 [2018-12-03 18:37:06,711 INFO L226 Difference]: Without dead ends: 198 [2018-12-03 18:37:06,712 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29674 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=14514, Invalid=36788, Unknown=0, NotChecked=0, Total=51302 [2018-12-03 18:37:06,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-12-03 18:37:06,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2018-12-03 18:37:06,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-12-03 18:37:06,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 232 transitions. [2018-12-03 18:37:06,719 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 232 transitions. Word has length 188 [2018-12-03 18:37:06,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:37:06,720 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 232 transitions. [2018-12-03 18:37:06,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-12-03 18:37:06,720 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 232 transitions. [2018-12-03 18:37:06,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-12-03 18:37:06,721 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:37:06,721 INFO L402 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1] [2018-12-03 18:37:06,721 INFO L423 AbstractCegarLoop]: === Iteration 40 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:37:06,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:37:06,721 INFO L82 PathProgramCache]: Analyzing trace with hash -928758432, now seen corresponding path program 38 times [2018-12-03 18:37:06,722 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:37:06,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:37:06,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:37:06,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:37:06,723 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:37:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:37:09,936 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 18:37:09,936 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:37:09,936 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:37:09,937 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:37:09,937 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:37:09,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:37:09,937 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 18:37:09,946 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 18:37:09,946 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 18:37:10,270 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-12-03 18:37:10,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:37:10,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:37:13,938 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 18:37:13,938 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:37:19,343 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 18:37:19,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:37:19,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 232 [2018-12-03 18:37:19,362 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:37:19,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-12-03 18:37:19,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-12-03 18:37:19,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15286, Invalid=38770, Unknown=0, NotChecked=0, Total=54056 [2018-12-03 18:37:19,365 INFO L87 Difference]: Start difference. First operand 194 states and 232 transitions. Second operand 156 states. [2018-12-03 18:37:20,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:37:20,685 INFO L93 Difference]: Finished difference Result 205 states and 245 transitions. [2018-12-03 18:37:20,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-12-03 18:37:20,685 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 193 [2018-12-03 18:37:20,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:37:20,686 INFO L225 Difference]: With dead ends: 205 [2018-12-03 18:37:20,686 INFO L226 Difference]: Without dead ends: 203 [2018-12-03 18:37:20,688 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31293 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=15286, Invalid=38770, Unknown=0, NotChecked=0, Total=54056 [2018-12-03 18:37:20,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-12-03 18:37:20,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-12-03 18:37:20,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-12-03 18:37:20,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 238 transitions. [2018-12-03 18:37:20,692 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 238 transitions. Word has length 193 [2018-12-03 18:37:20,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:37:20,692 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 238 transitions. [2018-12-03 18:37:20,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-12-03 18:37:20,693 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 238 transitions. [2018-12-03 18:37:20,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-12-03 18:37:20,693 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:37:20,693 INFO L402 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1] [2018-12-03 18:37:20,694 INFO L423 AbstractCegarLoop]: === Iteration 41 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:37:20,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:37:20,694 INFO L82 PathProgramCache]: Analyzing trace with hash -93644692, now seen corresponding path program 39 times [2018-12-03 18:37:20,694 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:37:20,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:37:20,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:37:20,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:37:20,695 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:37:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:37:23,342 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 18:37:23,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:37:23,342 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:37:23,342 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:37:23,343 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:37:23,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:37:23,343 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 18:37:23,353 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 18:37:23,353 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 18:37:23,394 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 18:37:23,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:37:23,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:37:27,391 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 18:37:27,391 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:37:32,938 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 18:37:32,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:37:32,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 238 [2018-12-03 18:37:32,957 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:37:32,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-12-03 18:37:32,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-12-03 18:37:32,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16078, Invalid=40804, Unknown=0, NotChecked=0, Total=56882 [2018-12-03 18:37:32,961 INFO L87 Difference]: Start difference. First operand 199 states and 238 transitions. Second operand 160 states. [2018-12-03 18:37:34,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:37:34,151 INFO L93 Difference]: Finished difference Result 210 states and 251 transitions. [2018-12-03 18:37:34,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-12-03 18:37:34,152 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 198 [2018-12-03 18:37:34,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:37:34,153 INFO L225 Difference]: With dead ends: 210 [2018-12-03 18:37:34,153 INFO L226 Difference]: Without dead ends: 208 [2018-12-03 18:37:34,155 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32955 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=16078, Invalid=40804, Unknown=0, NotChecked=0, Total=56882 [2018-12-03 18:37:34,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-12-03 18:37:34,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2018-12-03 18:37:34,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-12-03 18:37:34,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 244 transitions. [2018-12-03 18:37:34,160 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 244 transitions. Word has length 198 [2018-12-03 18:37:34,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:37:34,160 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 244 transitions. [2018-12-03 18:37:34,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-12-03 18:37:34,160 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 244 transitions. [2018-12-03 18:37:34,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-12-03 18:37:34,161 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:37:34,161 INFO L402 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1] [2018-12-03 18:37:34,161 INFO L423 AbstractCegarLoop]: === Iteration 42 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:37:34,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:37:34,161 INFO L82 PathProgramCache]: Analyzing trace with hash 392842464, now seen corresponding path program 40 times [2018-12-03 18:37:34,161 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:37:34,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:37:34,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:37:34,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:37:34,162 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:37:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:37:37,105 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 18:37:37,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:37:37,105 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:37:37,105 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:37:37,105 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:37:37,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:37:37,106 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 18:37:37,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:37:37,115 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:37:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:37:37,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:37:41,386 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 18:37:41,386 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:37:47,190 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 18:37:47,209 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:37:47,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 244 [2018-12-03 18:37:47,209 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:37:47,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-12-03 18:37:47,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-12-03 18:37:47,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16890, Invalid=42890, Unknown=0, NotChecked=0, Total=59780 [2018-12-03 18:37:47,212 INFO L87 Difference]: Start difference. First operand 204 states and 244 transitions. Second operand 164 states. [2018-12-03 18:37:48,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:37:48,524 INFO L93 Difference]: Finished difference Result 215 states and 257 transitions. [2018-12-03 18:37:48,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-12-03 18:37:48,525 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 203 [2018-12-03 18:37:48,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:37:48,526 INFO L225 Difference]: With dead ends: 215 [2018-12-03 18:37:48,526 INFO L226 Difference]: Without dead ends: 213 [2018-12-03 18:37:48,528 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34660 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=16890, Invalid=42890, Unknown=0, NotChecked=0, Total=59780 [2018-12-03 18:37:48,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-12-03 18:37:48,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 209. [2018-12-03 18:37:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-12-03 18:37:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 250 transitions. [2018-12-03 18:37:48,533 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 250 transitions. Word has length 203 [2018-12-03 18:37:48,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:37:48,533 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 250 transitions. [2018-12-03 18:37:48,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-12-03 18:37:48,533 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 250 transitions. [2018-12-03 18:37:48,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-12-03 18:37:48,534 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:37:48,534 INFO L402 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1] [2018-12-03 18:37:48,534 INFO L423 AbstractCegarLoop]: === Iteration 43 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:37:48,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:37:48,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1010974484, now seen corresponding path program 41 times [2018-12-03 18:37:48,535 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:37:48,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:37:48,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:37:48,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:37:48,536 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:37:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:37:51,408 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 18:37:51,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:37:51,409 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:37:51,409 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:37:51,409 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:37:51,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:37:51,409 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 18:37:51,418 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 18:37:51,418 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 18:37:51,487 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-12-03 18:37:51,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:37:51,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:37:57,880 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 18:37:57,881 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:38:04,145 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 18:38:04,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:38:04,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84, 84] total 250 [2018-12-03 18:38:04,164 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:38:04,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-12-03 18:38:04,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-12-03 18:38:04,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17722, Invalid=45028, Unknown=0, NotChecked=0, Total=62750 [2018-12-03 18:38:04,167 INFO L87 Difference]: Start difference. First operand 209 states and 250 transitions. Second operand 168 states. [2018-12-03 18:38:05,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:38:05,614 INFO L93 Difference]: Finished difference Result 220 states and 263 transitions. [2018-12-03 18:38:05,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-12-03 18:38:05,614 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 208 [2018-12-03 18:38:05,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:38:05,616 INFO L225 Difference]: With dead ends: 220 [2018-12-03 18:38:05,616 INFO L226 Difference]: Without dead ends: 218 [2018-12-03 18:38:05,617 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36408 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=17722, Invalid=45028, Unknown=0, NotChecked=0, Total=62750 [2018-12-03 18:38:05,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-12-03 18:38:05,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 214. [2018-12-03 18:38:05,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-12-03 18:38:05,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 256 transitions. [2018-12-03 18:38:05,624 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 256 transitions. Word has length 208 [2018-12-03 18:38:05,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:38:05,624 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 256 transitions. [2018-12-03 18:38:05,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-12-03 18:38:05,624 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 256 transitions. [2018-12-03 18:38:05,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-12-03 18:38:05,626 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:38:05,626 INFO L402 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1] [2018-12-03 18:38:05,626 INFO L423 AbstractCegarLoop]: === Iteration 44 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:38:05,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:38:05,627 INFO L82 PathProgramCache]: Analyzing trace with hash -638782368, now seen corresponding path program 42 times [2018-12-03 18:38:05,627 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:38:05,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:38:05,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:38:05,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:38:05,628 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:38:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:38:08,206 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 18:38:08,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:38:08,207 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:38:08,207 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:38:08,207 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:38:08,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:38:08,207 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:38:08,216 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 18:38:08,216 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 18:38:08,264 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 18:38:08,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:38:08,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:38:12,824 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 18:38:12,824 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:38:19,104 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 18:38:19,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:38:19,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86, 86] total 256 [2018-12-03 18:38:19,125 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:38:19,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-12-03 18:38:19,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-12-03 18:38:19,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18574, Invalid=47218, Unknown=0, NotChecked=0, Total=65792 [2018-12-03 18:38:19,129 INFO L87 Difference]: Start difference. First operand 214 states and 256 transitions. Second operand 172 states. [2018-12-03 18:38:20,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:38:20,559 INFO L93 Difference]: Finished difference Result 225 states and 269 transitions. [2018-12-03 18:38:20,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-12-03 18:38:20,559 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 213 [2018-12-03 18:38:20,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:38:20,560 INFO L225 Difference]: With dead ends: 225 [2018-12-03 18:38:20,560 INFO L226 Difference]: Without dead ends: 223 [2018-12-03 18:38:20,562 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38199 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=18574, Invalid=47218, Unknown=0, NotChecked=0, Total=65792 [2018-12-03 18:38:20,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-12-03 18:38:20,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2018-12-03 18:38:20,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-12-03 18:38:20,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 262 transitions. [2018-12-03 18:38:20,569 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 262 transitions. Word has length 213 [2018-12-03 18:38:20,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:38:20,569 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 262 transitions. [2018-12-03 18:38:20,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-12-03 18:38:20,569 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 262 transitions. [2018-12-03 18:38:20,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-12-03 18:38:20,570 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:38:20,571 INFO L402 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1] [2018-12-03 18:38:20,571 INFO L423 AbstractCegarLoop]: === Iteration 45 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:38:20,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:38:20,571 INFO L82 PathProgramCache]: Analyzing trace with hash 372754796, now seen corresponding path program 43 times [2018-12-03 18:38:20,571 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:38:20,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:38:20,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:38:20,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:38:20,572 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:38:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:38:23,538 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 18:38:23,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:38:23,538 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:38:23,539 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:38:23,539 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:38:23,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:38:23,539 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 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 18:38:23,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:38:23,547 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:38:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:38:23,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:38:28,491 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 18:38:28,492 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:38:35,145 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 18:38:35,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:38:35,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88, 88] total 262 [2018-12-03 18:38:35,166 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:38:35,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-12-03 18:38:35,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-12-03 18:38:35,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19446, Invalid=49460, Unknown=0, NotChecked=0, Total=68906 [2018-12-03 18:38:35,169 INFO L87 Difference]: Start difference. First operand 219 states and 262 transitions. Second operand 176 states. [2018-12-03 18:38:36,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:38:36,706 INFO L93 Difference]: Finished difference Result 230 states and 275 transitions. [2018-12-03 18:38:36,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-12-03 18:38:36,706 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 218 [2018-12-03 18:38:36,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:38:36,707 INFO L225 Difference]: With dead ends: 230 [2018-12-03 18:38:36,707 INFO L226 Difference]: Without dead ends: 228 [2018-12-03 18:38:36,709 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40033 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=19446, Invalid=49460, Unknown=0, NotChecked=0, Total=68906 [2018-12-03 18:38:36,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-12-03 18:38:36,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2018-12-03 18:38:36,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-12-03 18:38:36,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 268 transitions. [2018-12-03 18:38:36,714 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 268 transitions. Word has length 218 [2018-12-03 18:38:36,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:38:36,714 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 268 transitions. [2018-12-03 18:38:36,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-12-03 18:38:36,714 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 268 transitions. [2018-12-03 18:38:36,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-12-03 18:38:36,715 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:38:36,715 INFO L402 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1] [2018-12-03 18:38:36,715 INFO L423 AbstractCegarLoop]: === Iteration 46 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:38:36,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:38:36,716 INFO L82 PathProgramCache]: Analyzing trace with hash -2065417248, now seen corresponding path program 44 times [2018-12-03 18:38:36,716 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:38:36,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:38:36,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:38:36,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:38:36,716 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:38:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:38:39,497 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 18:38:39,497 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:38:39,497 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:38:39,498 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:38:39,498 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:38:39,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:38:39,498 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 18:38:39,507 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 18:38:39,508 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 18:38:39,582 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-12-03 18:38:39,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:38:39,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:38:44,682 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 18:38:44,682 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:38:51,949 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 18:38:51,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:38:51,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90, 90] total 268 [2018-12-03 18:38:51,969 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:38:51,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-12-03 18:38:51,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-12-03 18:38:51,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20338, Invalid=51754, Unknown=0, NotChecked=0, Total=72092 [2018-12-03 18:38:51,972 INFO L87 Difference]: Start difference. First operand 224 states and 268 transitions. Second operand 180 states. [2018-12-03 18:38:53,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:38:53,702 INFO L93 Difference]: Finished difference Result 235 states and 281 transitions. [2018-12-03 18:38:53,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-12-03 18:38:53,702 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 223 [2018-12-03 18:38:53,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:38:53,703 INFO L225 Difference]: With dead ends: 235 [2018-12-03 18:38:53,703 INFO L226 Difference]: Without dead ends: 233 [2018-12-03 18:38:53,705 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41910 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=20338, Invalid=51754, Unknown=0, NotChecked=0, Total=72092 [2018-12-03 18:38:53,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-12-03 18:38:53,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2018-12-03 18:38:53,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-12-03 18:38:53,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 274 transitions. [2018-12-03 18:38:53,712 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 274 transitions. Word has length 223 [2018-12-03 18:38:53,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:38:53,713 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 274 transitions. [2018-12-03 18:38:53,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-12-03 18:38:53,713 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 274 transitions. [2018-12-03 18:38:53,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-12-03 18:38:53,714 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:38:53,714 INFO L402 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1] [2018-12-03 18:38:53,714 INFO L423 AbstractCegarLoop]: === Iteration 47 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:38:53,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:38:53,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1340001812, now seen corresponding path program 45 times [2018-12-03 18:38:53,715 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:38:53,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:38:53,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:38:53,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:38:53,716 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:38:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:38:56,608 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 18:38:56,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:38:56,609 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:38:56,609 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:38:56,609 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:38:56,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:38:56,609 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 18:38:56,619 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 18:38:56,620 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 18:38:56,672 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 18:38:56,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:38:56,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:39:01,846 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 18:39:01,846 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:39:09,292 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 18:39:09,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:39:09,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92, 92] total 274 [2018-12-03 18:39:09,311 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:39:09,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 184 states [2018-12-03 18:39:09,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2018-12-03 18:39:09,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21250, Invalid=54100, Unknown=0, NotChecked=0, Total=75350 [2018-12-03 18:39:09,315 INFO L87 Difference]: Start difference. First operand 229 states and 274 transitions. Second operand 184 states. [2018-12-03 18:39:11,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:39:11,127 INFO L93 Difference]: Finished difference Result 240 states and 287 transitions. [2018-12-03 18:39:11,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-12-03 18:39:11,128 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 228 [2018-12-03 18:39:11,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:39:11,129 INFO L225 Difference]: With dead ends: 240 [2018-12-03 18:39:11,129 INFO L226 Difference]: Without dead ends: 238 [2018-12-03 18:39:11,131 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43830 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=21250, Invalid=54100, Unknown=0, NotChecked=0, Total=75350 [2018-12-03 18:39:11,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-12-03 18:39:11,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2018-12-03 18:39:11,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-12-03 18:39:11,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 280 transitions. [2018-12-03 18:39:11,139 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 280 transitions. Word has length 228 [2018-12-03 18:39:11,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:39:11,139 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 280 transitions. [2018-12-03 18:39:11,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 184 states. [2018-12-03 18:39:11,139 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 280 transitions. [2018-12-03 18:39:11,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-12-03 18:39:11,140 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:39:11,140 INFO L402 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1] [2018-12-03 18:39:11,141 INFO L423 AbstractCegarLoop]: === Iteration 48 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:39:11,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:39:11,141 INFO L82 PathProgramCache]: Analyzing trace with hash 117973856, now seen corresponding path program 46 times [2018-12-03 18:39:11,141 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:39:11,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:39:11,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:39:11,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:39:11,142 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:39:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:39:14,449 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 18:39:14,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:39:14,449 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:39:14,450 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:39:14,450 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:39:14,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:39:14,450 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 18:39:14,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:39:14,458 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:39:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:39:14,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:39:20,298 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 18:39:20,298 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:39:28,356 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 18:39:28,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:39:28,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94, 94] total 280 [2018-12-03 18:39:28,376 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:39:28,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 188 states [2018-12-03 18:39:28,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2018-12-03 18:39:28,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22182, Invalid=56498, Unknown=0, NotChecked=0, Total=78680 [2018-12-03 18:39:28,379 INFO L87 Difference]: Start difference. First operand 234 states and 280 transitions. Second operand 188 states. [2018-12-03 18:39:30,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:39:30,303 INFO L93 Difference]: Finished difference Result 245 states and 293 transitions. [2018-12-03 18:39:30,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-12-03 18:39:30,303 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 233 [2018-12-03 18:39:30,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:39:30,304 INFO L225 Difference]: With dead ends: 245 [2018-12-03 18:39:30,305 INFO L226 Difference]: Without dead ends: 243 [2018-12-03 18:39:30,307 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45793 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=22182, Invalid=56498, Unknown=0, NotChecked=0, Total=78680 [2018-12-03 18:39:30,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-12-03 18:39:30,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2018-12-03 18:39:30,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-12-03 18:39:30,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 286 transitions. [2018-12-03 18:39:30,314 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 286 transitions. Word has length 233 [2018-12-03 18:39:30,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:39:30,314 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 286 transitions. [2018-12-03 18:39:30,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 188 states. [2018-12-03 18:39:30,315 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 286 transitions. [2018-12-03 18:39:30,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-12-03 18:39:30,316 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:39:30,316 INFO L402 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1] [2018-12-03 18:39:30,316 INFO L423 AbstractCegarLoop]: === Iteration 49 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:39:30,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:39:30,317 INFO L82 PathProgramCache]: Analyzing trace with hash 365034092, now seen corresponding path program 47 times [2018-12-03 18:39:30,317 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:39:30,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:39:30,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:39:30,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:39:30,318 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:39:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:39:33,794 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 18:39:33,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:39:33,794 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:39:33,794 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:39:33,794 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:39:33,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:39:33,795 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 18:39:33,803 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 18:39:33,803 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 18:39:33,884 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-12-03 18:39:33,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:39:33,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:39:39,561 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 18:39:39,561 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:39:47,558 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 18:39:47,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:39:47,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 286 [2018-12-03 18:39:47,577 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:39:47,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2018-12-03 18:39:47,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2018-12-03 18:39:47,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23134, Invalid=58948, Unknown=0, NotChecked=0, Total=82082 [2018-12-03 18:39:47,581 INFO L87 Difference]: Start difference. First operand 239 states and 286 transitions. Second operand 192 states. [2018-12-03 18:39:49,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:39:49,501 INFO L93 Difference]: Finished difference Result 250 states and 299 transitions. [2018-12-03 18:39:49,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-12-03 18:39:49,502 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 238 [2018-12-03 18:39:49,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:39:49,503 INFO L225 Difference]: With dead ends: 250 [2018-12-03 18:39:49,503 INFO L226 Difference]: Without dead ends: 248 [2018-12-03 18:39:49,505 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47799 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=23134, Invalid=58948, Unknown=0, NotChecked=0, Total=82082 [2018-12-03 18:39:49,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-12-03 18:39:49,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2018-12-03 18:39:49,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-12-03 18:39:49,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 292 transitions. [2018-12-03 18:39:49,511 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 292 transitions. Word has length 238 [2018-12-03 18:39:49,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:39:49,511 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 292 transitions. [2018-12-03 18:39:49,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 192 states. [2018-12-03 18:39:49,511 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 292 transitions. [2018-12-03 18:39:49,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-12-03 18:39:49,512 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:39:49,512 INFO L402 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1] [2018-12-03 18:39:49,512 INFO L423 AbstractCegarLoop]: === Iteration 50 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:39:49,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:39:49,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1225829088, now seen corresponding path program 48 times [2018-12-03 18:39:49,513 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:39:49,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:39:49,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:39:49,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:39:49,514 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:39:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:39:52,729 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 18:39:52,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:39:52,729 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:39:52,729 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:39:52,729 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:39:52,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:39:52,730 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 18:39:52,740 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 18:39:52,741 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 18:39:52,796 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 18:39:52,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:39:52,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:39:58,903 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 18:39:58,903 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:40:07,227 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 18:40:07,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:40:07,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 292 [2018-12-03 18:40:07,246 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:40:07,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 196 states [2018-12-03 18:40:07,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2018-12-03 18:40:07,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24106, Invalid=61450, Unknown=0, NotChecked=0, Total=85556 [2018-12-03 18:40:07,249 INFO L87 Difference]: Start difference. First operand 244 states and 292 transitions. Second operand 196 states. [2018-12-03 18:40:09,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:40:09,157 INFO L93 Difference]: Finished difference Result 255 states and 305 transitions. [2018-12-03 18:40:09,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-12-03 18:40:09,158 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 243 [2018-12-03 18:40:09,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:40:09,159 INFO L225 Difference]: With dead ends: 255 [2018-12-03 18:40:09,159 INFO L226 Difference]: Without dead ends: 253 [2018-12-03 18:40:09,160 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49848 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=24106, Invalid=61450, Unknown=0, NotChecked=0, Total=85556 [2018-12-03 18:40:09,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-12-03 18:40:09,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2018-12-03 18:40:09,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-12-03 18:40:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 298 transitions. [2018-12-03 18:40:09,166 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 298 transitions. Word has length 243 [2018-12-03 18:40:09,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:40:09,166 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 298 transitions. [2018-12-03 18:40:09,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 196 states. [2018-12-03 18:40:09,167 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 298 transitions. [2018-12-03 18:40:09,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-12-03 18:40:09,168 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:40:09,168 INFO L402 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1] [2018-12-03 18:40:09,168 INFO L423 AbstractCegarLoop]: === Iteration 51 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:40:09,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:40:09,168 INFO L82 PathProgramCache]: Analyzing trace with hash 291644140, now seen corresponding path program 49 times [2018-12-03 18:40:09,168 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:40:09,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:40:09,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:40:09,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:40:09,169 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:40:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:40:12,589 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 18:40:12,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:40:12,590 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:40:12,590 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:40:12,590 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:40:12,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:40:12,590 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 18:40:12,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:40:12,598 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:40:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:40:12,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:40:18,808 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 18:40:18,809 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:40:27,336 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 18:40:27,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:40:27,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100, 100] total 298 [2018-12-03 18:40:27,357 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:40:27,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 200 states [2018-12-03 18:40:27,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2018-12-03 18:40:27,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25098, Invalid=64004, Unknown=0, NotChecked=0, Total=89102 [2018-12-03 18:40:27,362 INFO L87 Difference]: Start difference. First operand 249 states and 298 transitions. Second operand 200 states. [2018-12-03 18:40:29,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:40:29,536 INFO L93 Difference]: Finished difference Result 260 states and 311 transitions. [2018-12-03 18:40:29,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-12-03 18:40:29,537 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 248 [2018-12-03 18:40:29,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:40:29,538 INFO L225 Difference]: With dead ends: 260 [2018-12-03 18:40:29,538 INFO L226 Difference]: Without dead ends: 258 [2018-12-03 18:40:29,541 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51940 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=25098, Invalid=64004, Unknown=0, NotChecked=0, Total=89102 [2018-12-03 18:40:29,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-12-03 18:40:29,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 254. [2018-12-03 18:40:29,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-12-03 18:40:29,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 304 transitions. [2018-12-03 18:40:29,549 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 304 transitions. Word has length 248 [2018-12-03 18:40:29,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:40:29,549 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 304 transitions. [2018-12-03 18:40:29,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 200 states. [2018-12-03 18:40:29,549 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 304 transitions. [2018-12-03 18:40:29,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-12-03 18:40:29,551 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:40:29,551 INFO L402 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1] [2018-12-03 18:40:29,551 INFO L423 AbstractCegarLoop]: === Iteration 52 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:40:29,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:40:29,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1380593056, now seen corresponding path program 50 times [2018-12-03 18:40:29,552 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:40:29,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:40:29,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:40:29,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:40:29,552 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:40:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:40:33,053 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 18:40:33,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:40:33,054 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:40:33,054 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:40:33,054 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:40:33,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:40:33,054 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 18:40:33,063 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 18:40:33,063 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 18:40:33,154 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-12-03 18:40:33,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:40:33,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:40:39,801 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 18:40:39,801 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:40:48,512 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 18:40:48,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:40:48,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 304 [2018-12-03 18:40:48,532 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:40:48,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 204 states [2018-12-03 18:40:48,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2018-12-03 18:40:48,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26109, Invalid=66611, Unknown=0, NotChecked=0, Total=92720 [2018-12-03 18:40:48,536 INFO L87 Difference]: Start difference. First operand 254 states and 304 transitions. Second operand 204 states. [2018-12-03 18:40:50,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:40:50,774 INFO L93 Difference]: Finished difference Result 265 states and 317 transitions. [2018-12-03 18:40:50,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-12-03 18:40:50,775 INFO L78 Accepts]: Start accepts. Automaton has 204 states. Word has length 253 [2018-12-03 18:40:50,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:40:50,776 INFO L225 Difference]: With dead ends: 265 [2018-12-03 18:40:50,776 INFO L226 Difference]: Without dead ends: 263 [2018-12-03 18:40:50,778 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54173 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=26109, Invalid=66611, Unknown=0, NotChecked=0, Total=92720 [2018-12-03 18:40:50,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-12-03 18:40:50,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 259. [2018-12-03 18:40:50,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-12-03 18:40:50,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 310 transitions. [2018-12-03 18:40:50,785 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 310 transitions. Word has length 253 [2018-12-03 18:40:50,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:40:50,786 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 310 transitions. [2018-12-03 18:40:50,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 204 states. [2018-12-03 18:40:50,786 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 310 transitions. [2018-12-03 18:40:50,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-12-03 18:40:50,787 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:40:50,788 INFO L402 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1] [2018-12-03 18:40:50,788 INFO L423 AbstractCegarLoop]: === Iteration 53 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:40:50,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:40:50,788 INFO L82 PathProgramCache]: Analyzing trace with hash 860466028, now seen corresponding path program 51 times [2018-12-03 18:40:50,788 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:40:50,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:40:50,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:40:50,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:40:50,789 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:40:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:40:54,442 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 18:40:54,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:40:54,442 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:40:54,443 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:40:54,443 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:40:54,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:40:54,443 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 18:40:54,488 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 18:40:54,488 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 18:40:54,544 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 18:40:54,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:40:54,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:41:01,341 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 18:41:01,342 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:41:10,546 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 18:41:10,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:41:10,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104, 104] total 310 [2018-12-03 18:41:10,565 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:41:10,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 208 states [2018-12-03 18:41:10,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 208 interpolants. [2018-12-03 18:41:10,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27130, Invalid=69280, Unknown=0, NotChecked=0, Total=96410 [2018-12-03 18:41:10,570 INFO L87 Difference]: Start difference. First operand 259 states and 310 transitions. Second operand 208 states. [2018-12-03 18:41:12,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:41:12,921 INFO L93 Difference]: Finished difference Result 270 states and 323 transitions. [2018-12-03 18:41:12,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-12-03 18:41:12,921 INFO L78 Accepts]: Start accepts. Automaton has 208 states. Word has length 258 [2018-12-03 18:41:12,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:41:12,922 INFO L225 Difference]: With dead ends: 270 [2018-12-03 18:41:12,922 INFO L226 Difference]: Without dead ends: 268 [2018-12-03 18:41:12,924 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56746 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=27130, Invalid=69280, Unknown=0, NotChecked=0, Total=96410 [2018-12-03 18:41:12,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-12-03 18:41:12,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2018-12-03 18:41:12,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-12-03 18:41:12,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 316 transitions. [2018-12-03 18:41:12,929 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 316 transitions. Word has length 258 [2018-12-03 18:41:12,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:41:12,930 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 316 transitions. [2018-12-03 18:41:12,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 208 states. [2018-12-03 18:41:12,930 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 316 transitions. [2018-12-03 18:41:12,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-12-03 18:41:12,931 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:41:12,931 INFO L402 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1] [2018-12-03 18:41:12,931 INFO L423 AbstractCegarLoop]: === Iteration 54 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:41:12,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:41:12,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1850762784, now seen corresponding path program 52 times [2018-12-03 18:41:12,932 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:41:12,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:41:12,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:41:12,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:41:12,932 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:41:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:41:16,931 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 18:41:16,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:41:16,931 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:41:16,931 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:41:16,931 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:41:16,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:41:16,932 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 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 18:41:16,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:41:16,940 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:41:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:41:17,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:41:23,796 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 18:41:23,796 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:41:33,379 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 18:41:33,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:41:33,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 316 [2018-12-03 18:41:33,398 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:41:33,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 212 states [2018-12-03 18:41:33,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2018-12-03 18:41:33,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28159, Invalid=72013, Unknown=0, NotChecked=0, Total=100172 [2018-12-03 18:41:33,403 INFO L87 Difference]: Start difference. First operand 264 states and 316 transitions. Second operand 212 states. [2018-12-03 18:41:35,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:41:35,938 INFO L93 Difference]: Finished difference Result 275 states and 329 transitions. [2018-12-03 18:41:35,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-12-03 18:41:35,938 INFO L78 Accepts]: Start accepts. Automaton has 212 states. Word has length 263 [2018-12-03 18:41:35,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:41:35,939 INFO L225 Difference]: With dead ends: 275 [2018-12-03 18:41:35,940 INFO L226 Difference]: Without dead ends: 273 [2018-12-03 18:41:35,942 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59374 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=28159, Invalid=72013, Unknown=0, NotChecked=0, Total=100172 [2018-12-03 18:41:35,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-12-03 18:41:35,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 269. [2018-12-03 18:41:35,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-12-03 18:41:35,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 322 transitions. [2018-12-03 18:41:35,948 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 322 transitions. Word has length 263 [2018-12-03 18:41:35,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:41:35,948 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 322 transitions. [2018-12-03 18:41:35,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 212 states. [2018-12-03 18:41:35,948 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 322 transitions. [2018-12-03 18:41:35,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-12-03 18:41:35,949 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:41:35,949 INFO L402 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1] [2018-12-03 18:41:35,949 INFO L423 AbstractCegarLoop]: === Iteration 55 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:41:35,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:41:35,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1371575276, now seen corresponding path program 53 times [2018-12-03 18:41:35,950 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:41:35,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:41:35,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:41:35,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:41:35,950 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:41:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:41:39,802 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 18:41:39,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:41:39,802 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:41:39,802 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:41:39,803 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:41:39,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:41:39,803 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 18:41:39,813 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 18:41:39,813 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 18:41:39,907 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-12-03 18:41:39,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:41:39,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:41:47,162 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 18:41:47,162 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:41:56,801 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 18:41:56,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:41:56,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108, 108] total 322 [2018-12-03 18:41:56,822 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:41:56,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 216 states [2018-12-03 18:41:56,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2018-12-03 18:41:56,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29196, Invalid=74810, Unknown=0, NotChecked=0, Total=104006 [2018-12-03 18:41:56,826 INFO L87 Difference]: Start difference. First operand 269 states and 322 transitions. Second operand 216 states. [2018-12-03 18:41:59,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:41:59,510 INFO L93 Difference]: Finished difference Result 280 states and 335 transitions. [2018-12-03 18:41:59,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-12-03 18:41:59,511 INFO L78 Accepts]: Start accepts. Automaton has 216 states. Word has length 268 [2018-12-03 18:41:59,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:41:59,512 INFO L225 Difference]: With dead ends: 280 [2018-12-03 18:41:59,512 INFO L226 Difference]: Without dead ends: 278 [2018-12-03 18:41:59,514 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62057 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=29196, Invalid=74810, Unknown=0, NotChecked=0, Total=104006 [2018-12-03 18:41:59,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-12-03 18:41:59,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 274. [2018-12-03 18:41:59,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-12-03 18:41:59,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 328 transitions. [2018-12-03 18:41:59,522 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 328 transitions. Word has length 268 [2018-12-03 18:41:59,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:41:59,522 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 328 transitions. [2018-12-03 18:41:59,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 216 states. [2018-12-03 18:41:59,522 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 328 transitions. [2018-12-03 18:41:59,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-12-03 18:41:59,524 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:41:59,524 INFO L402 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1] [2018-12-03 18:41:59,524 INFO L423 AbstractCegarLoop]: === Iteration 56 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:41:59,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:41:59,524 INFO L82 PathProgramCache]: Analyzing trace with hash -877264544, now seen corresponding path program 54 times [2018-12-03 18:41:59,525 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:41:59,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:41:59,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:41:59,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:41:59,525 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:41:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:42:03,935 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 18:42:03,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:42:03,935 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:42:03,935 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:42:03,935 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:42:03,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:42:03,935 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 18:42:03,945 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 18:42:03,945 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 18:42:04,009 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 18:42:04,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:42:04,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:42:11,374 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 18:42:11,375 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:42:21,064 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 18:42:21,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:42:21,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110, 110] total 328 [2018-12-03 18:42:21,084 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:42:21,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 220 states [2018-12-03 18:42:21,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 220 interpolants. [2018-12-03 18:42:21,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30241, Invalid=77671, Unknown=0, NotChecked=0, Total=107912 [2018-12-03 18:42:21,089 INFO L87 Difference]: Start difference. First operand 274 states and 328 transitions. Second operand 220 states. [2018-12-03 18:42:23,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:42:23,827 INFO L93 Difference]: Finished difference Result 285 states and 341 transitions. [2018-12-03 18:42:23,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-12-03 18:42:23,827 INFO L78 Accepts]: Start accepts. Automaton has 220 states. Word has length 273 [2018-12-03 18:42:23,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:42:23,828 INFO L225 Difference]: With dead ends: 285 [2018-12-03 18:42:23,828 INFO L226 Difference]: Without dead ends: 283 [2018-12-03 18:42:23,830 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64795 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=30241, Invalid=77671, Unknown=0, NotChecked=0, Total=107912 [2018-12-03 18:42:23,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-12-03 18:42:23,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 279. [2018-12-03 18:42:23,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-12-03 18:42:23,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 334 transitions. [2018-12-03 18:42:23,838 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 334 transitions. Word has length 273 [2018-12-03 18:42:23,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:42:23,838 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 334 transitions. [2018-12-03 18:42:23,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 220 states. [2018-12-03 18:42:23,838 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 334 transitions. [2018-12-03 18:42:23,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-12-03 18:42:23,840 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:42:23,840 INFO L402 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1] [2018-12-03 18:42:23,840 INFO L423 AbstractCegarLoop]: === Iteration 57 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:42:23,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:42:23,840 INFO L82 PathProgramCache]: Analyzing trace with hash 151968876, now seen corresponding path program 55 times [2018-12-03 18:42:23,840 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:42:23,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:42:23,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:42:23,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:42:23,841 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:42:23,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:42:28,317 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 18:42:28,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:42:28,317 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:42:28,317 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:42:28,317 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:42:28,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:42:28,318 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 18:42:28,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:42:28,329 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:42:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:42:28,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:42:35,959 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 18:42:35,959 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:42:46,023 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 18:42:46,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:42:46,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112, 112] total 334 [2018-12-03 18:42:46,043 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:42:46,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 224 states [2018-12-03 18:42:46,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2018-12-03 18:42:46,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31294, Invalid=80596, Unknown=0, NotChecked=0, Total=111890 [2018-12-03 18:42:46,048 INFO L87 Difference]: Start difference. First operand 279 states and 334 transitions. Second operand 224 states. [2018-12-03 18:42:49,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:42:49,093 INFO L93 Difference]: Finished difference Result 290 states and 347 transitions. [2018-12-03 18:42:49,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-12-03 18:42:49,093 INFO L78 Accepts]: Start accepts. Automaton has 224 states. Word has length 278 [2018-12-03 18:42:49,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:42:49,095 INFO L225 Difference]: With dead ends: 290 [2018-12-03 18:42:49,095 INFO L226 Difference]: Without dead ends: 288 [2018-12-03 18:42:49,097 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67588 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=31294, Invalid=80596, Unknown=0, NotChecked=0, Total=111890 [2018-12-03 18:42:49,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-12-03 18:42:49,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 284. [2018-12-03 18:42:49,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-12-03 18:42:49,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 340 transitions. [2018-12-03 18:42:49,103 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 340 transitions. Word has length 278 [2018-12-03 18:42:49,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:42:49,103 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 340 transitions. [2018-12-03 18:42:49,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 224 states. [2018-12-03 18:42:49,103 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 340 transitions. [2018-12-03 18:42:49,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-12-03 18:42:49,105 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:42:49,105 INFO L402 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1] [2018-12-03 18:42:49,105 INFO L423 AbstractCegarLoop]: === Iteration 58 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:42:49,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:42:49,106 INFO L82 PathProgramCache]: Analyzing trace with hash 746653920, now seen corresponding path program 56 times [2018-12-03 18:42:49,106 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:42:49,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:42:49,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:42:49,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:42:49,107 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:42:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:42:53,833 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 18:42:53,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:42:53,833 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:42:53,833 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:42:53,833 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:42:53,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:42:53,833 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 18:42:53,845 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 18:42:53,845 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 18:42:53,961 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-12-03 18:42:53,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:42:53,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:43:01,850 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 18:43:01,850 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:43:12,149 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 18:43:12,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:43:12,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114, 114] total 340 [2018-12-03 18:43:12,168 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:43:12,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 228 states [2018-12-03 18:43:12,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2018-12-03 18:43:12,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32355, Invalid=83585, Unknown=0, NotChecked=0, Total=115940 [2018-12-03 18:43:12,173 INFO L87 Difference]: Start difference. First operand 284 states and 340 transitions. Second operand 228 states. [2018-12-03 18:43:15,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:43:15,145 INFO L93 Difference]: Finished difference Result 295 states and 353 transitions. [2018-12-03 18:43:15,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-12-03 18:43:15,146 INFO L78 Accepts]: Start accepts. Automaton has 228 states. Word has length 283 [2018-12-03 18:43:15,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:43:15,147 INFO L225 Difference]: With dead ends: 295 [2018-12-03 18:43:15,147 INFO L226 Difference]: Without dead ends: 293 [2018-12-03 18:43:15,149 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70436 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=32355, Invalid=83585, Unknown=0, NotChecked=0, Total=115940 [2018-12-03 18:43:15,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-12-03 18:43:15,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 289. [2018-12-03 18:43:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-12-03 18:43:15,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 346 transitions. [2018-12-03 18:43:15,154 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 346 transitions. Word has length 283 [2018-12-03 18:43:15,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:43:15,155 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 346 transitions. [2018-12-03 18:43:15,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 228 states. [2018-12-03 18:43:15,155 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 346 transitions. [2018-12-03 18:43:15,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-12-03 18:43:15,156 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:43:15,156 INFO L402 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1] [2018-12-03 18:43:15,156 INFO L423 AbstractCegarLoop]: === Iteration 59 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:43:15,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:43:15,156 INFO L82 PathProgramCache]: Analyzing trace with hash 998016236, now seen corresponding path program 57 times [2018-12-03 18:43:15,157 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:43:15,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:43:15,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:43:15,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:43:15,157 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:43:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:43:19,962 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 18:43:19,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:43:19,963 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:43:19,963 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:43:19,963 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:43:19,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:43:19,963 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 18:43:19,973 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 18:43:19,973 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 18:43:20,038 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 18:43:20,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:43:20,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:43:28,004 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 18:43:28,005 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:43:38,641 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 18:43:38,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:43:38,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116, 116] total 346 [2018-12-03 18:43:38,661 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:43:38,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 232 states [2018-12-03 18:43:38,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 232 interpolants. [2018-12-03 18:43:38,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33424, Invalid=86638, Unknown=0, NotChecked=0, Total=120062 [2018-12-03 18:43:38,666 INFO L87 Difference]: Start difference. First operand 289 states and 346 transitions. Second operand 232 states. [2018-12-03 18:43:41,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:43:41,850 INFO L93 Difference]: Finished difference Result 300 states and 359 transitions. [2018-12-03 18:43:41,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-12-03 18:43:41,850 INFO L78 Accepts]: Start accepts. Automaton has 232 states. Word has length 288 [2018-12-03 18:43:41,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:43:41,851 INFO L225 Difference]: With dead ends: 300 [2018-12-03 18:43:41,851 INFO L226 Difference]: Without dead ends: 298 [2018-12-03 18:43:41,853 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 345 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73339 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=33424, Invalid=86638, Unknown=0, NotChecked=0, Total=120062 [2018-12-03 18:43:41,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-12-03 18:43:41,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2018-12-03 18:43:41,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-12-03 18:43:41,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 352 transitions. [2018-12-03 18:43:41,861 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 352 transitions. Word has length 288 [2018-12-03 18:43:41,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:43:41,862 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 352 transitions. [2018-12-03 18:43:41,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 232 states. [2018-12-03 18:43:41,862 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 352 transitions. [2018-12-03 18:43:41,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-12-03 18:43:41,863 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:43:41,863 INFO L402 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1] [2018-12-03 18:43:41,864 INFO L423 AbstractCegarLoop]: === Iteration 60 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:43:41,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:43:41,864 INFO L82 PathProgramCache]: Analyzing trace with hash -20402080, now seen corresponding path program 58 times [2018-12-03 18:43:41,864 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:43:41,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:43:41,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:43:41,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:43:41,865 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:43:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:43:46,814 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 18:43:46,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:43:46,814 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:43:46,815 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:43:46,815 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:43:46,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:43:46,815 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 18:43:46,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:43:46,826 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:43:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:43:46,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:43:55,376 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 18:43:55,376 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:44:06,033 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 18:44:06,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:44:06,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118, 118] total 352 [2018-12-03 18:44:06,053 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:44:06,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 236 states [2018-12-03 18:44:06,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 236 interpolants. [2018-12-03 18:44:06,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34501, Invalid=89755, Unknown=0, NotChecked=0, Total=124256 [2018-12-03 18:44:06,059 INFO L87 Difference]: Start difference. First operand 294 states and 352 transitions. Second operand 236 states. [2018-12-03 18:44:09,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:44:09,428 INFO L93 Difference]: Finished difference Result 305 states and 365 transitions. [2018-12-03 18:44:09,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-12-03 18:44:09,428 INFO L78 Accepts]: Start accepts. Automaton has 236 states. Word has length 293 [2018-12-03 18:44:09,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:44:09,429 INFO L225 Difference]: With dead ends: 305 [2018-12-03 18:44:09,429 INFO L226 Difference]: Without dead ends: 303 [2018-12-03 18:44:09,433 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 351 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76297 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=34501, Invalid=89755, Unknown=0, NotChecked=0, Total=124256 [2018-12-03 18:44:09,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-12-03 18:44:09,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 299. [2018-12-03 18:44:09,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-12-03 18:44:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 358 transitions. [2018-12-03 18:44:09,441 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 358 transitions. Word has length 293 [2018-12-03 18:44:09,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:44:09,441 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 358 transitions. [2018-12-03 18:44:09,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 236 states. [2018-12-03 18:44:09,441 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 358 transitions. [2018-12-03 18:44:09,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-12-03 18:44:09,443 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:44:09,443 INFO L402 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1] [2018-12-03 18:44:09,443 INFO L423 AbstractCegarLoop]: === Iteration 61 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:44:09,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:44:09,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1856926356, now seen corresponding path program 59 times [2018-12-03 18:44:09,444 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:44:09,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:44:09,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:44:09,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:44:09,445 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:44:09,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:44:14,436 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 18:44:14,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:44:14,436 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:44:14,436 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:44:14,436 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:44:14,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:44:14,437 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 18:44:14,445 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 18:44:14,445 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 18:44:14,568 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-12-03 18:44:14,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:44:14,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:44:23,097 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 18:44:23,098 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:44:33,934 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 18:44:33,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:44:33,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120, 120] total 358 [2018-12-03 18:44:33,954 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:44:33,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 240 states [2018-12-03 18:44:33,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 240 interpolants. [2018-12-03 18:44:33,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35586, Invalid=92936, Unknown=0, NotChecked=0, Total=128522 [2018-12-03 18:44:33,959 INFO L87 Difference]: Start difference. First operand 299 states and 358 transitions. Second operand 240 states. [2018-12-03 18:44:37,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:44:37,445 INFO L93 Difference]: Finished difference Result 310 states and 371 transitions. [2018-12-03 18:44:37,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-12-03 18:44:37,446 INFO L78 Accepts]: Start accepts. Automaton has 240 states. Word has length 298 [2018-12-03 18:44:37,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:44:37,447 INFO L225 Difference]: With dead ends: 310 [2018-12-03 18:44:37,447 INFO L226 Difference]: Without dead ends: 308 [2018-12-03 18:44:37,449 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 357 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79310 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=35586, Invalid=92936, Unknown=0, NotChecked=0, Total=128522 [2018-12-03 18:44:37,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-12-03 18:44:37,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 304. [2018-12-03 18:44:37,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-12-03 18:44:37,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 364 transitions. [2018-12-03 18:44:37,455 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 364 transitions. Word has length 298 [2018-12-03 18:44:37,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:44:37,455 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 364 transitions. [2018-12-03 18:44:37,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 240 states. [2018-12-03 18:44:37,455 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 364 transitions. [2018-12-03 18:44:37,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-12-03 18:44:37,456 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:44:37,456 INFO L402 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 1, 1, 1] [2018-12-03 18:44:37,456 INFO L423 AbstractCegarLoop]: === Iteration 62 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:44:37,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:44:37,457 INFO L82 PathProgramCache]: Analyzing trace with hash -2025523232, now seen corresponding path program 60 times [2018-12-03 18:44:37,457 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:44:37,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:44:37,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:44:37,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:44:37,457 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:44:37,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:44:42,752 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 18:44:42,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:44:42,753 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:44:42,753 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:44:42,753 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:44:42,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:44:42,753 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 18:44:42,762 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 18:44:42,762 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 18:44:42,832 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 18:44:42,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:44:42,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:44:51,905 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 18:44:51,905 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:45:02,844 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 18:45:02,864 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:45:02,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122, 122] total 364 [2018-12-03 18:45:02,865 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:45:02,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 244 states [2018-12-03 18:45:02,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 244 interpolants. [2018-12-03 18:45:02,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36679, Invalid=96181, Unknown=0, NotChecked=0, Total=132860 [2018-12-03 18:45:02,870 INFO L87 Difference]: Start difference. First operand 304 states and 364 transitions. Second operand 244 states. [2018-12-03 18:45:06,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:45:06,514 INFO L93 Difference]: Finished difference Result 315 states and 377 transitions. [2018-12-03 18:45:06,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-12-03 18:45:06,514 INFO L78 Accepts]: Start accepts. Automaton has 244 states. Word has length 303 [2018-12-03 18:45:06,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:45:06,516 INFO L225 Difference]: With dead ends: 315 [2018-12-03 18:45:06,516 INFO L226 Difference]: Without dead ends: 313 [2018-12-03 18:45:06,519 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 363 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82378 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=36679, Invalid=96181, Unknown=0, NotChecked=0, Total=132860 [2018-12-03 18:45:06,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-12-03 18:45:06,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 309. [2018-12-03 18:45:06,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-12-03 18:45:06,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 370 transitions. [2018-12-03 18:45:06,525 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 370 transitions. Word has length 303 [2018-12-03 18:45:06,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:45:06,525 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 370 transitions. [2018-12-03 18:45:06,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 244 states. [2018-12-03 18:45:06,525 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 370 transitions. [2018-12-03 18:45:06,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-12-03 18:45:06,526 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:45:06,527 INFO L402 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 1, 1, 1] [2018-12-03 18:45:06,527 INFO L423 AbstractCegarLoop]: === Iteration 63 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:45:06,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:45:06,527 INFO L82 PathProgramCache]: Analyzing trace with hash -120195604, now seen corresponding path program 61 times [2018-12-03 18:45:06,527 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:45:06,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:45:06,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:45:06,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:45:06,528 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:45:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:45:11,882 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 18:45:11,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:45:11,883 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:45:11,883 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:45:11,883 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:45:11,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:45:11,883 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 18:45:11,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:45:11,894 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:45:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:45:11,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:45:21,099 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 18:45:21,100 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:45:32,517 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 18:45:32,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:45:32,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124, 124] total 370 [2018-12-03 18:45:32,537 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:45:32,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 248 states [2018-12-03 18:45:32,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 248 interpolants. [2018-12-03 18:45:32,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37780, Invalid=99490, Unknown=0, NotChecked=0, Total=137270 [2018-12-03 18:45:32,542 INFO L87 Difference]: Start difference. First operand 309 states and 370 transitions. Second operand 248 states. [2018-12-03 18:45:36,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:45:36,287 INFO L93 Difference]: Finished difference Result 320 states and 383 transitions. [2018-12-03 18:45:36,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-12-03 18:45:36,287 INFO L78 Accepts]: Start accepts. Automaton has 248 states. Word has length 308 [2018-12-03 18:45:36,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:45:36,288 INFO L225 Difference]: With dead ends: 320 [2018-12-03 18:45:36,288 INFO L226 Difference]: Without dead ends: 318 [2018-12-03 18:45:36,290 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 369 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85501 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=37780, Invalid=99490, Unknown=0, NotChecked=0, Total=137270 [2018-12-03 18:45:36,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-12-03 18:45:36,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 314. [2018-12-03 18:45:36,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-12-03 18:45:36,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 376 transitions. [2018-12-03 18:45:36,298 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 376 transitions. Word has length 308 [2018-12-03 18:45:36,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:45:36,298 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 376 transitions. [2018-12-03 18:45:36,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 248 states. [2018-12-03 18:45:36,298 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 376 transitions. [2018-12-03 18:45:36,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-12-03 18:45:36,300 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:45:36,300 INFO L402 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1] [2018-12-03 18:45:36,300 INFO L423 AbstractCegarLoop]: === Iteration 64 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:45:36,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:45:36,301 INFO L82 PathProgramCache]: Analyzing trace with hash -2068979872, now seen corresponding path program 62 times [2018-12-03 18:45:36,301 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:45:36,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:45:36,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:45:36,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:45:36,302 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:45:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:45:41,876 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 18:45:41,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:45:41,876 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:45:41,876 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:45:41,876 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:45:41,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:45:41,877 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 18:45:41,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 18:45:41,886 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 18:45:42,018 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-12-03 18:45:42,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:45:42,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:45:51,327 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 18:45:51,328 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:46:03,112 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 18:46:03,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:46:03,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126, 126] total 376 [2018-12-03 18:46:03,132 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:46:03,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 252 states [2018-12-03 18:46:03,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 252 interpolants. [2018-12-03 18:46:03,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38889, Invalid=102863, Unknown=0, NotChecked=0, Total=141752 [2018-12-03 18:46:03,138 INFO L87 Difference]: Start difference. First operand 314 states and 376 transitions. Second operand 252 states. [2018-12-03 18:46:06,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:46:06,892 INFO L93 Difference]: Finished difference Result 325 states and 389 transitions. [2018-12-03 18:46:06,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-12-03 18:46:06,893 INFO L78 Accepts]: Start accepts. Automaton has 252 states. Word has length 313 [2018-12-03 18:46:06,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:46:06,894 INFO L225 Difference]: With dead ends: 325 [2018-12-03 18:46:06,894 INFO L226 Difference]: Without dead ends: 323 [2018-12-03 18:46:06,897 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 750 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 375 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88679 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=38889, Invalid=102863, Unknown=0, NotChecked=0, Total=141752 [2018-12-03 18:46:06,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-12-03 18:46:06,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 319. [2018-12-03 18:46:06,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-03 18:46:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 382 transitions. [2018-12-03 18:46:06,903 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 382 transitions. Word has length 313 [2018-12-03 18:46:06,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:46:06,903 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 382 transitions. [2018-12-03 18:46:06,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 252 states. [2018-12-03 18:46:06,904 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 382 transitions. [2018-12-03 18:46:06,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-12-03 18:46:06,905 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:46:06,905 INFO L402 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1] [2018-12-03 18:46:06,905 INFO L423 AbstractCegarLoop]: === Iteration 65 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:46:06,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:46:06,906 INFO L82 PathProgramCache]: Analyzing trace with hash 642891372, now seen corresponding path program 63 times [2018-12-03 18:46:06,906 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:46:06,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:46:06,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:46:06,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:46:06,907 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:46:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:46:12,660 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 18:46:12,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:46:12,660 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:46:12,660 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:46:12,660 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:46:12,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:46:12,660 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 18:46:12,674 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 18:46:12,675 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 18:46:12,748 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 18:46:12,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 18:46:12,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:46:22,115 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 18:46:22,115 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:46:34,018 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 18:46:34,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 18:46:34,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128, 128] total 382 [2018-12-03 18:46:34,036 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:46:34,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 256 states [2018-12-03 18:46:34,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 256 interpolants. [2018-12-03 18:46:34,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40006, Invalid=106300, Unknown=0, NotChecked=0, Total=146306 [2018-12-03 18:46:34,045 INFO L87 Difference]: Start difference. First operand 319 states and 382 transitions. Second operand 256 states. [2018-12-03 18:46:38,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:46:38,341 INFO L93 Difference]: Finished difference Result 330 states and 395 transitions. [2018-12-03 18:46:38,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-12-03 18:46:38,342 INFO L78 Accepts]: Start accepts. Automaton has 256 states. Word has length 318 [2018-12-03 18:46:38,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:46:38,343 INFO L225 Difference]: With dead ends: 330 [2018-12-03 18:46:38,343 INFO L226 Difference]: Without dead ends: 328 [2018-12-03 18:46:38,348 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91912 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=40006, Invalid=106300, Unknown=0, NotChecked=0, Total=146306 [2018-12-03 18:46:38,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-12-03 18:46:38,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2018-12-03 18:46:38,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2018-12-03 18:46:38,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 388 transitions. [2018-12-03 18:46:38,355 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 388 transitions. Word has length 318 [2018-12-03 18:46:38,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:46:38,355 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 388 transitions. [2018-12-03 18:46:38,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 256 states. [2018-12-03 18:46:38,355 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 388 transitions. [2018-12-03 18:46:38,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2018-12-03 18:46:38,356 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:46:38,357 INFO L402 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 1, 1, 1] [2018-12-03 18:46:38,357 INFO L423 AbstractCegarLoop]: === Iteration 66 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 18:46:38,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:46:38,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1346672928, now seen corresponding path program 64 times [2018-12-03 18:46:38,357 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:46:38,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:46:38,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:46:38,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:46:38,358 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:46:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:46:44,201 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 18:46:44,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:46:44,201 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 18:46:44,201 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 18:46:44,202 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:46:44,202 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:46:44,202 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 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 18:46:44,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:46:44,211 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:46:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:46:44,289 INFO L273 TraceCheckSpWp]: Computing forward predicates...