java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_compound_oct_cong.epf -i ../../../trunk/examples/programs/real-life/GateController.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 17:13:10,243 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 17:13:10,245 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 17:13:10,259 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-12-03 17:13:10,307 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_compound_oct_cong.epf [2018-12-03 17:13:10,319 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 17:13:10,320 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 17:13:10,321 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 17:13:10,321 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 17:13:10,321 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 17:13:10,321 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 17:13:10,321 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 17:13:10,322 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 17:13:10,322 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 17:13:10,322 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 17:13:10,322 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 17:13:10,322 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 17:13:10,323 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 17:13:10,323 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 17:13:10,324 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 17:13:10,324 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 17:13:10,324 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 17:13:10,324 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 17:13:10,324 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 17:13:10,325 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 17:13:10,328 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 17:13:10,328 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 17:13:10,328 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 17:13:10,328 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 17:13:10,329 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 17:13:10,329 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 17:13:10,329 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 17:13:10,329 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 17:13:10,329 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 17:13:10,330 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 17:13:10,330 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 17:13:10,330 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 17:13:10,330 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 17:13:10,330 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 17:13:10,332 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 17:13:10,332 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 17:13:10,332 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 17:13:10,332 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 17:13:10,332 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 17:13:10,371 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 17:13:10,384 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 17:13:10,388 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 17:13:10,389 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 17:13:10,390 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 17:13:10,391 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/GateController.bpl [2018-12-03 17:13:10,391 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/GateController.bpl' [2018-12-03 17:13:10,426 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 17:13:10,428 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 17:13:10,429 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 17:13:10,429 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 17:13:10,429 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 17:13:10,451 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 05:13:10" (1/1) ... [2018-12-03 17:13:10,461 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 05:13:10" (1/1) ... [2018-12-03 17:13:10,470 WARN L165 Inliner]: Program contained no entry procedure! [2018-12-03 17:13:10,470 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-12-03 17:13:10,471 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-12-03 17:13:10,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 17:13:10,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 17:13:10,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 17:13:10,474 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 17:13:10,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:13:10" (1/1) ... [2018-12-03 17:13:10,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:13:10" (1/1) ... [2018-12-03 17:13:10,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:13:10" (1/1) ... [2018-12-03 17:13:10,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:13:10" (1/1) ... [2018-12-03 17:13:10,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:13:10" (1/1) ... [2018-12-03 17:13:10,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:13:10" (1/1) ... [2018-12-03 17:13:10,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:13:10" (1/1) ... [2018-12-03 17:13:10,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 17:13:10,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 17:13:10,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 17:13:10,498 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 17:13:10,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:13:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 17:13:10,571 INFO L124 BoogieDeclarations]: Specification and implementation of procedure GateController given in one single declaration [2018-12-03 17:13:10,573 INFO L130 BoogieDeclarations]: Found specification of procedure GateController [2018-12-03 17:13:10,574 INFO L138 BoogieDeclarations]: Found implementation of procedure GateController [2018-12-03 17:13:10,912 INFO L272 CfgBuilder]: Using library mode [2018-12-03 17:13:10,913 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-03 17:13:10,914 INFO L202 PluginConnector]: Adding new model GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:13:10 BoogieIcfgContainer [2018-12-03 17:13:10,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 17:13:10,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 17:13:10,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 17:13:10,918 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 17:13:10,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:13:10" (1/2) ... [2018-12-03 17:13:10,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc22b4c and model type GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 05:13:10, skipping insertion in model container [2018-12-03 17:13:10,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:13:10" (2/2) ... [2018-12-03 17:13:10,922 INFO L112 eAbstractionObserver]: Analyzing ICFG GateController.bpl [2018-12-03 17:13:10,934 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 17:13:10,943 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 17:13:10,963 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 17:13:11,004 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 17:13:11,005 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 17:13:11,005 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 17:13:11,005 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 17:13:11,005 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 17:13:11,006 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 17:13:11,006 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 17:13:11,006 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 17:13:11,031 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-12-03 17:13:11,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-03 17:13:11,038 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:11,039 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-03 17:13:11,043 INFO L423 AbstractCegarLoop]: === Iteration 1 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:11,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:11,050 INFO L82 PathProgramCache]: Analyzing trace with hash 30432, now seen corresponding path program 1 times [2018-12-03 17:13:11,053 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:11,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:11,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:11,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:11,102 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:11,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:11,200 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 17:13:11,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 17:13:11,201 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 17:13:11,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 17:13:11,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 17:13:11,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 17:13:11,224 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-12-03 17:13:11,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:11,284 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2018-12-03 17:13:11,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 17:13:11,285 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-03 17:13:11,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:11,296 INFO L225 Difference]: With dead ends: 19 [2018-12-03 17:13:11,297 INFO L226 Difference]: Without dead ends: 13 [2018-12-03 17:13:11,300 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 17:13:11,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-03 17:13:11,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 9. [2018-12-03 17:13:11,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-03 17:13:11,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2018-12-03 17:13:11,332 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 3 [2018-12-03 17:13:11,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:11,332 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2018-12-03 17:13:11,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 17:13:11,332 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2018-12-03 17:13:11,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-03 17:13:11,333 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:11,333 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 17:13:11,333 INFO L423 AbstractCegarLoop]: === Iteration 2 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:11,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:11,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1953617644, now seen corresponding path program 1 times [2018-12-03 17:13:11,334 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:11,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:11,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:11,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:11,335 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:11,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:11,544 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:11,546 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 9 with the following transitions: [2018-12-03 17:13:11,548 INFO L205 CegarAbsIntRunner]: [0], [4], [7], [11], [16], [18], [20], [21] [2018-12-03 17:13:11,608 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 17:13:11,608 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 17:13:12,310 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 17:13:12,316 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 17:13:12,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:12,332 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 17:13:12,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:12,333 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:12,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:12,352 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:13:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:12,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:12,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:12,602 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:12,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:12,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:12,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2018-12-03 17:13:12,804 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:12,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 17:13:12,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 17:13:12,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-12-03 17:13:12,808 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 8 states. [2018-12-03 17:13:12,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:12,993 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2018-12-03 17:13:12,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 17:13:12,994 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-12-03 17:13:12,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:12,995 INFO L225 Difference]: With dead ends: 21 [2018-12-03 17:13:12,995 INFO L226 Difference]: Without dead ends: 19 [2018-12-03 17:13:12,997 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 17:13:12,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-03 17:13:13,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2018-12-03 17:13:13,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-03 17:13:13,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2018-12-03 17:13:13,001 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2018-12-03 17:13:13,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:13,002 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2018-12-03 17:13:13,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 17:13:13,002 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2018-12-03 17:13:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-03 17:13:13,003 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:13,003 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 17:13:13,005 INFO L423 AbstractCegarLoop]: === Iteration 3 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:13,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:13,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1953558062, now seen corresponding path program 1 times [2018-12-03 17:13:13,005 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:13,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:13,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:13,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:13,008 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:13,055 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 17:13:13,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 17:13:13,055 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 17:13:13,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 17:13:13,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 17:13:13,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 17:13:13,056 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand 3 states. [2018-12-03 17:13:13,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:13,081 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2018-12-03 17:13:13,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 17:13:13,083 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-12-03 17:13:13,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:13,084 INFO L225 Difference]: With dead ends: 21 [2018-12-03 17:13:13,084 INFO L226 Difference]: Without dead ends: 14 [2018-12-03 17:13:13,084 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 17:13:13,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-12-03 17:13:13,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-12-03 17:13:13,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-03 17:13:13,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-12-03 17:13:13,088 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2018-12-03 17:13:13,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:13,088 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-12-03 17:13:13,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 17:13:13,089 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-12-03 17:13:13,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-03 17:13:13,089 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:13,089 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1] [2018-12-03 17:13:13,090 INFO L423 AbstractCegarLoop]: === Iteration 4 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:13,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:13,090 INFO L82 PathProgramCache]: Analyzing trace with hash 72785504, now seen corresponding path program 2 times [2018-12-03 17:13:13,090 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:13,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:13,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:13,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:13,092 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:13,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:13,200 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:13,201 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:13,201 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:13,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:13,202 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:13,212 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:13:13,212 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:13:13,227 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-03 17:13:13,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:13,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:13,542 WARN L180 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-12-03 17:13:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:13,889 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:14,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:14,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2018-12-03 17:13:14,049 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:14,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-03 17:13:14,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-03 17:13:14,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2018-12-03 17:13:14,051 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 12 states. [2018-12-03 17:13:14,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:14,108 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2018-12-03 17:13:14,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-03 17:13:14,109 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2018-12-03 17:13:14,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:14,110 INFO L225 Difference]: With dead ends: 25 [2018-12-03 17:13:14,110 INFO L226 Difference]: Without dead ends: 23 [2018-12-03 17:13:14,110 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 17:13:14,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-03 17:13:14,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-12-03 17:13:14,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-03 17:13:14,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2018-12-03 17:13:14,115 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2018-12-03 17:13:14,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:14,115 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2018-12-03 17:13:14,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-03 17:13:14,116 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2018-12-03 17:13:14,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-03 17:13:14,116 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:14,116 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1] [2018-12-03 17:13:14,117 INFO L423 AbstractCegarLoop]: === Iteration 5 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:14,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:14,117 INFO L82 PathProgramCache]: Analyzing trace with hash 491282284, now seen corresponding path program 3 times [2018-12-03 17:13:14,117 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:14,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:14,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:14,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:14,119 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:14,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:14,299 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:14,299 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:14,299 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:14,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:14,299 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:14,316 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:13:14,317 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:13:14,351 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:13:14,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:14,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:14,825 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:14,826 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:15,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:15,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2018-12-03 17:13:15,003 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:15,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-03 17:13:15,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-03 17:13:15,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2018-12-03 17:13:15,004 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 16 states. [2018-12-03 17:13:15,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:15,087 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2018-12-03 17:13:15,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-03 17:13:15,090 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-12-03 17:13:15,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:15,090 INFO L225 Difference]: With dead ends: 30 [2018-12-03 17:13:15,091 INFO L226 Difference]: Without dead ends: 28 [2018-12-03 17:13:15,091 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 17:13:15,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-03 17:13:15,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2018-12-03 17:13:15,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-03 17:13:15,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-12-03 17:13:15,096 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 18 [2018-12-03 17:13:15,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:15,096 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-12-03 17:13:15,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-03 17:13:15,097 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-12-03 17:13:15,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-03 17:13:15,098 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:15,098 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1] [2018-12-03 17:13:15,098 INFO L423 AbstractCegarLoop]: === Iteration 6 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:15,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:15,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1589732832, now seen corresponding path program 4 times [2018-12-03 17:13:15,099 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:15,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:15,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:15,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:15,100 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:15,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:15,269 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:15,270 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:15,270 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:15,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:15,270 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:15,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:15,285 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:13:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:15,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:15,696 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:15,854 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:15,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:15,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2018-12-03 17:13:15,875 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:15,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-03 17:13:15,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-03 17:13:15,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2018-12-03 17:13:15,876 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 20 states. [2018-12-03 17:13:16,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:16,280 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-12-03 17:13:16,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-03 17:13:16,287 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2018-12-03 17:13:16,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:16,288 INFO L225 Difference]: With dead ends: 35 [2018-12-03 17:13:16,288 INFO L226 Difference]: Without dead ends: 33 [2018-12-03 17:13:16,290 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 17:13:16,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-03 17:13:16,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2018-12-03 17:13:16,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-03 17:13:16,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2018-12-03 17:13:16,298 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 23 [2018-12-03 17:13:16,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:16,298 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2018-12-03 17:13:16,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-03 17:13:16,299 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2018-12-03 17:13:16,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-03 17:13:16,300 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:16,300 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1] [2018-12-03 17:13:16,300 INFO L423 AbstractCegarLoop]: === Iteration 7 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:16,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:16,301 INFO L82 PathProgramCache]: Analyzing trace with hash 602818540, now seen corresponding path program 5 times [2018-12-03 17:13:16,301 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:16,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:16,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:16,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:16,302 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:16,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:16,601 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:16,601 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:16,601 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:16,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:16,602 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:16,619 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:13:16,620 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:13:16,646 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-03 17:13:16,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:16,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:17,398 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:17,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:17,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2018-12-03 17:13:17,683 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:17,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-03 17:13:17,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-03 17:13:17,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=820, Unknown=0, NotChecked=0, Total=1190 [2018-12-03 17:13:17,685 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 24 states. [2018-12-03 17:13:17,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:17,903 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2018-12-03 17:13:17,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-03 17:13:17,904 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2018-12-03 17:13:17,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:17,905 INFO L225 Difference]: With dead ends: 40 [2018-12-03 17:13:17,906 INFO L226 Difference]: Without dead ends: 38 [2018-12-03 17:13:17,907 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=370, Invalid=820, Unknown=0, NotChecked=0, Total=1190 [2018-12-03 17:13:17,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-03 17:13:17,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2018-12-03 17:13:17,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-03 17:13:17,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2018-12-03 17:13:17,913 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 28 [2018-12-03 17:13:17,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:17,913 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2018-12-03 17:13:17,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-03 17:13:17,914 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2018-12-03 17:13:17,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-03 17:13:17,915 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:17,915 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1] [2018-12-03 17:13:17,915 INFO L423 AbstractCegarLoop]: === Iteration 8 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:17,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:17,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1979239776, now seen corresponding path program 6 times [2018-12-03 17:13:17,916 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:17,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:17,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:17,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:17,917 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:18,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:18,151 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:18,151 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:18,152 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:18,152 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:18,152 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:18,175 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:13:18,175 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:13:18,194 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:13:18,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:18,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:18,665 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:19,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:19,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2018-12-03 17:13:19,080 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:19,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-12-03 17:13:19,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-12-03 17:13:19,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=1138, Unknown=0, NotChecked=0, Total=1640 [2018-12-03 17:13:19,082 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 28 states. [2018-12-03 17:13:19,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:19,214 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2018-12-03 17:13:19,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-03 17:13:19,216 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 33 [2018-12-03 17:13:19,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:19,217 INFO L225 Difference]: With dead ends: 45 [2018-12-03 17:13:19,217 INFO L226 Difference]: Without dead ends: 43 [2018-12-03 17:13:19,218 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=502, Invalid=1138, Unknown=0, NotChecked=0, Total=1640 [2018-12-03 17:13:19,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-03 17:13:19,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-12-03 17:13:19,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-03 17:13:19,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2018-12-03 17:13:19,224 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 33 [2018-12-03 17:13:19,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:19,225 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2018-12-03 17:13:19,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-12-03 17:13:19,225 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2018-12-03 17:13:19,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-03 17:13:19,226 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:19,227 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1] [2018-12-03 17:13:19,227 INFO L423 AbstractCegarLoop]: === Iteration 9 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:19,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:19,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1800695700, now seen corresponding path program 7 times [2018-12-03 17:13:19,227 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:19,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:19,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:19,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:19,229 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:19,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:19,449 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:19,449 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:19,449 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:19,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:19,450 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:19,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:19,458 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:13:19,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:19,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:20,024 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:20,025 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:20,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:20,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2018-12-03 17:13:20,350 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:20,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-12-03 17:13:20,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-12-03 17:13:20,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=654, Invalid=1508, Unknown=0, NotChecked=0, Total=2162 [2018-12-03 17:13:20,353 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 32 states. [2018-12-03 17:13:20,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:20,515 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2018-12-03 17:13:20,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-03 17:13:20,516 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 38 [2018-12-03 17:13:20,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:20,518 INFO L225 Difference]: With dead ends: 50 [2018-12-03 17:13:20,518 INFO L226 Difference]: Without dead ends: 48 [2018-12-03 17:13:20,519 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 17:13:20,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-03 17:13:20,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2018-12-03 17:13:20,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-03 17:13:20,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2018-12-03 17:13:20,526 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 38 [2018-12-03 17:13:20,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:20,526 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2018-12-03 17:13:20,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-12-03 17:13:20,527 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2018-12-03 17:13:20,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-03 17:13:20,528 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:20,528 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1] [2018-12-03 17:13:20,528 INFO L423 AbstractCegarLoop]: === Iteration 10 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:20,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:20,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1430989600, now seen corresponding path program 8 times [2018-12-03 17:13:20,529 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:20,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:20,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:20,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:20,530 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:20,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:20,783 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:20,783 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:20,783 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:20,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:20,784 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:20,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:13:20,794 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:13:20,820 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-03 17:13:20,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:20,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:21,260 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:21,260 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:22,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:22,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2018-12-03 17:13:22,847 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:22,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-03 17:13:22,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-03 17:13:22,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1930, Unknown=0, NotChecked=0, Total=2756 [2018-12-03 17:13:22,849 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 36 states. [2018-12-03 17:13:23,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:23,256 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2018-12-03 17:13:23,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-03 17:13:23,257 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2018-12-03 17:13:23,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:23,258 INFO L225 Difference]: With dead ends: 55 [2018-12-03 17:13:23,258 INFO L226 Difference]: Without dead ends: 53 [2018-12-03 17:13:23,260 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=826, Invalid=1930, Unknown=0, NotChecked=0, Total=2756 [2018-12-03 17:13:23,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-03 17:13:23,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2018-12-03 17:13:23,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-03 17:13:23,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2018-12-03 17:13:23,266 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 43 [2018-12-03 17:13:23,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:23,267 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2018-12-03 17:13:23,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-03 17:13:23,267 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2018-12-03 17:13:23,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-12-03 17:13:23,268 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:23,268 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1] [2018-12-03 17:13:23,269 INFO L423 AbstractCegarLoop]: === Iteration 11 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:23,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:23,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1043842836, now seen corresponding path program 9 times [2018-12-03 17:13:23,269 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:23,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:23,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:23,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:23,270 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:23,600 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:23,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:23,600 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:23,600 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:23,600 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:23,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:23,601 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:23,609 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:13:23,609 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:13:23,638 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:13:23,639 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:23,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:24,127 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:25,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:25,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2018-12-03 17:13:25,093 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:25,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-12-03 17:13:25,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-12-03 17:13:25,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1018, Invalid=2404, Unknown=0, NotChecked=0, Total=3422 [2018-12-03 17:13:25,096 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 40 states. [2018-12-03 17:13:25,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:25,247 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2018-12-03 17:13:25,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-03 17:13:25,248 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2018-12-03 17:13:25,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:25,249 INFO L225 Difference]: With dead ends: 60 [2018-12-03 17:13:25,249 INFO L226 Difference]: Without dead ends: 58 [2018-12-03 17:13:25,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1018, Invalid=2404, Unknown=0, NotChecked=0, Total=3422 [2018-12-03 17:13:25,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-03 17:13:25,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2018-12-03 17:13:25,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-12-03 17:13:25,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2018-12-03 17:13:25,257 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 48 [2018-12-03 17:13:25,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:25,257 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2018-12-03 17:13:25,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-12-03 17:13:25,257 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2018-12-03 17:13:25,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-03 17:13:25,258 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:25,258 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1] [2018-12-03 17:13:25,259 INFO L423 AbstractCegarLoop]: === Iteration 12 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:25,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:25,259 INFO L82 PathProgramCache]: Analyzing trace with hash -676496288, now seen corresponding path program 10 times [2018-12-03 17:13:25,259 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:25,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:25,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:25,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:25,260 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:25,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:25,980 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:25,980 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:25,980 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:25,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:25,980 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:25,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:25,995 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:13:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:26,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:27,145 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:27,670 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:27,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 64 [2018-12-03 17:13:27,671 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:27,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-12-03 17:13:27,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-12-03 17:13:27,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=2930, Unknown=0, NotChecked=0, Total=4160 [2018-12-03 17:13:27,674 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 44 states. [2018-12-03 17:13:27,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:27,916 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2018-12-03 17:13:27,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-03 17:13:27,916 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 53 [2018-12-03 17:13:27,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:27,918 INFO L225 Difference]: With dead ends: 65 [2018-12-03 17:13:27,918 INFO L226 Difference]: Without dead ends: 63 [2018-12-03 17:13:27,920 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2215 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1230, Invalid=2930, Unknown=0, NotChecked=0, Total=4160 [2018-12-03 17:13:27,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-03 17:13:27,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-12-03 17:13:27,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-03 17:13:27,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2018-12-03 17:13:27,927 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 53 [2018-12-03 17:13:27,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:27,927 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2018-12-03 17:13:27,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-12-03 17:13:27,928 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2018-12-03 17:13:27,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-12-03 17:13:27,929 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:27,929 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1] [2018-12-03 17:13:27,929 INFO L423 AbstractCegarLoop]: === Iteration 13 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:27,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:27,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1014218388, now seen corresponding path program 11 times [2018-12-03 17:13:27,930 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:27,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:27,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:27,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:27,931 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:28,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:28,350 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:28,350 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:28,350 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:28,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:28,350 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:28,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:13:28,359 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:13:28,384 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-12-03 17:13:28,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:28,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:29,156 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:29,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:29,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2018-12-03 17:13:29,684 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:29,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-12-03 17:13:29,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-12-03 17:13:29,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1462, Invalid=3508, Unknown=0, NotChecked=0, Total=4970 [2018-12-03 17:13:29,686 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 48 states. [2018-12-03 17:13:29,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:29,861 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2018-12-03 17:13:29,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-03 17:13:29,862 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 58 [2018-12-03 17:13:29,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:29,862 INFO L225 Difference]: With dead ends: 70 [2018-12-03 17:13:29,863 INFO L226 Difference]: Without dead ends: 68 [2018-12-03 17:13:29,864 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2673 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1462, Invalid=3508, Unknown=0, NotChecked=0, Total=4970 [2018-12-03 17:13:29,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-03 17:13:29,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2018-12-03 17:13:29,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-03 17:13:29,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2018-12-03 17:13:29,871 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 58 [2018-12-03 17:13:29,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:29,871 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2018-12-03 17:13:29,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-12-03 17:13:29,871 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2018-12-03 17:13:29,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-03 17:13:29,872 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:29,872 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1] [2018-12-03 17:13:29,873 INFO L423 AbstractCegarLoop]: === Iteration 14 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:29,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:29,873 INFO L82 PathProgramCache]: Analyzing trace with hash -778386464, now seen corresponding path program 12 times [2018-12-03 17:13:29,873 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:29,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:29,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:29,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:29,874 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:30,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:30,256 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:30,256 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:30,256 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:30,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:30,256 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:30,268 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:13:30,268 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:13:30,282 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:13:30,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:30,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:31,087 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:31,088 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:31,982 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:32,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:32,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 76 [2018-12-03 17:13:32,000 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:32,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-12-03 17:13:32,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-12-03 17:13:32,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1714, Invalid=4138, Unknown=0, NotChecked=0, Total=5852 [2018-12-03 17:13:32,003 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 52 states. [2018-12-03 17:13:32,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:32,250 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2018-12-03 17:13:32,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-12-03 17:13:32,250 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 63 [2018-12-03 17:13:32,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:32,252 INFO L225 Difference]: With dead ends: 75 [2018-12-03 17:13:32,252 INFO L226 Difference]: Without dead ends: 73 [2018-12-03 17:13:32,254 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3174 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1714, Invalid=4138, Unknown=0, NotChecked=0, Total=5852 [2018-12-03 17:13:32,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-12-03 17:13:32,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2018-12-03 17:13:32,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-12-03 17:13:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2018-12-03 17:13:32,260 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 63 [2018-12-03 17:13:32,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:32,260 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2018-12-03 17:13:32,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-12-03 17:13:32,260 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2018-12-03 17:13:32,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-12-03 17:13:32,261 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:32,262 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1] [2018-12-03 17:13:32,262 INFO L423 AbstractCegarLoop]: === Iteration 15 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:32,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:32,262 INFO L82 PathProgramCache]: Analyzing trace with hash -130045460, now seen corresponding path program 13 times [2018-12-03 17:13:32,262 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:32,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:32,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:32,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:32,266 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:32,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:32,822 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:32,822 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:32,822 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:32,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:32,823 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:32,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:32,833 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:13:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:32,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:33,628 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:34,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:34,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 82 [2018-12-03 17:13:34,507 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:34,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-12-03 17:13:34,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-12-03 17:13:34,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1986, Invalid=4820, Unknown=0, NotChecked=0, Total=6806 [2018-12-03 17:13:34,510 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 56 states. [2018-12-03 17:13:34,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:34,721 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2018-12-03 17:13:34,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-03 17:13:34,721 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 68 [2018-12-03 17:13:34,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:34,722 INFO L225 Difference]: With dead ends: 80 [2018-12-03 17:13:34,722 INFO L226 Difference]: Without dead ends: 78 [2018-12-03 17:13:34,723 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3718 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1986, Invalid=4820, Unknown=0, NotChecked=0, Total=6806 [2018-12-03 17:13:34,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-12-03 17:13:34,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2018-12-03 17:13:34,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-12-03 17:13:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2018-12-03 17:13:34,729 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 68 [2018-12-03 17:13:34,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:34,730 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2018-12-03 17:13:34,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-12-03 17:13:34,730 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2018-12-03 17:13:34,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-03 17:13:34,731 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:34,731 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1] [2018-12-03 17:13:34,731 INFO L423 AbstractCegarLoop]: === Iteration 16 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:34,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:34,732 INFO L82 PathProgramCache]: Analyzing trace with hash -415978656, now seen corresponding path program 14 times [2018-12-03 17:13:34,732 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:34,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:34,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:34,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:34,733 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:35,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:35,215 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:35,215 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:35,215 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:35,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:35,215 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:35,224 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:13:35,224 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:13:35,250 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-12-03 17:13:35,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:35,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:36,274 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:37,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:37,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 88 [2018-12-03 17:13:37,369 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:37,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-12-03 17:13:37,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-12-03 17:13:37,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=5554, Unknown=0, NotChecked=0, Total=7832 [2018-12-03 17:13:37,371 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 60 states. [2018-12-03 17:13:37,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:37,584 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2018-12-03 17:13:37,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-03 17:13:37,585 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 73 [2018-12-03 17:13:37,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:37,585 INFO L225 Difference]: With dead ends: 85 [2018-12-03 17:13:37,585 INFO L226 Difference]: Without dead ends: 83 [2018-12-03 17:13:37,587 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4305 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2278, Invalid=5554, Unknown=0, NotChecked=0, Total=7832 [2018-12-03 17:13:37,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-12-03 17:13:37,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-12-03 17:13:37,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-12-03 17:13:37,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2018-12-03 17:13:37,592 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 73 [2018-12-03 17:13:37,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:37,593 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2018-12-03 17:13:37,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-12-03 17:13:37,593 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2018-12-03 17:13:37,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-12-03 17:13:37,594 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:37,594 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1] [2018-12-03 17:13:37,594 INFO L423 AbstractCegarLoop]: === Iteration 17 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:37,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:37,595 INFO L82 PathProgramCache]: Analyzing trace with hash -2077592980, now seen corresponding path program 15 times [2018-12-03 17:13:37,595 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:37,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:37,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:37,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:37,596 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:38,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:38,098 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:38,098 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:38,098 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:38,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:38,099 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:38,107 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:13:38,108 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:13:38,125 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:13:38,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:38,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:38,960 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:39,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:39,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 94 [2018-12-03 17:13:39,837 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:39,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-12-03 17:13:39,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-12-03 17:13:39,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2590, Invalid=6340, Unknown=0, NotChecked=0, Total=8930 [2018-12-03 17:13:39,839 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 64 states. [2018-12-03 17:13:40,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:40,316 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2018-12-03 17:13:40,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-03 17:13:40,324 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 78 [2018-12-03 17:13:40,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:40,325 INFO L225 Difference]: With dead ends: 90 [2018-12-03 17:13:40,325 INFO L226 Difference]: Without dead ends: 88 [2018-12-03 17:13:40,326 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4935 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2590, Invalid=6340, Unknown=0, NotChecked=0, Total=8930 [2018-12-03 17:13:40,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-12-03 17:13:40,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2018-12-03 17:13:40,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-12-03 17:13:40,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2018-12-03 17:13:40,331 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 78 [2018-12-03 17:13:40,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:40,331 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2018-12-03 17:13:40,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-12-03 17:13:40,332 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2018-12-03 17:13:40,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-12-03 17:13:40,332 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:40,338 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1] [2018-12-03 17:13:40,338 INFO L423 AbstractCegarLoop]: === Iteration 18 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:40,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:40,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1630745312, now seen corresponding path program 16 times [2018-12-03 17:13:40,338 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:40,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:40,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:40,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:40,339 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:40,877 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:40,877 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:40,878 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:40,878 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:40,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:40,878 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:40,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:40,887 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:13:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:40,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:42,153 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:43,120 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:43,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:43,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 100 [2018-12-03 17:13:43,140 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:43,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-12-03 17:13:43,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-12-03 17:13:43,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2922, Invalid=7178, Unknown=0, NotChecked=0, Total=10100 [2018-12-03 17:13:43,142 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 68 states. [2018-12-03 17:13:43,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:43,543 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2018-12-03 17:13:43,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-12-03 17:13:43,543 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 83 [2018-12-03 17:13:43,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:43,544 INFO L225 Difference]: With dead ends: 95 [2018-12-03 17:13:43,544 INFO L226 Difference]: Without dead ends: 93 [2018-12-03 17:13:43,545 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5608 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2922, Invalid=7178, Unknown=0, NotChecked=0, Total=10100 [2018-12-03 17:13:43,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-12-03 17:13:43,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2018-12-03 17:13:43,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-03 17:13:43,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2018-12-03 17:13:43,551 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 83 [2018-12-03 17:13:43,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:43,551 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2018-12-03 17:13:43,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-12-03 17:13:43,552 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2018-12-03 17:13:43,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-12-03 17:13:43,553 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:43,558 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1] [2018-12-03 17:13:43,558 INFO L423 AbstractCegarLoop]: === Iteration 19 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:43,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:43,558 INFO L82 PathProgramCache]: Analyzing trace with hash -778790164, now seen corresponding path program 17 times [2018-12-03 17:13:43,558 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:43,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:43,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:43,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:43,559 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:44,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:44,667 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:44,667 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:44,667 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:44,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:44,668 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:44,677 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:13:44,677 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:13:44,706 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-12-03 17:13:44,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:44,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:45,861 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:45,862 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:47,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:47,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 106 [2018-12-03 17:13:47,243 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:47,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-12-03 17:13:47,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-12-03 17:13:47,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3274, Invalid=8068, Unknown=0, NotChecked=0, Total=11342 [2018-12-03 17:13:47,245 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand 72 states. [2018-12-03 17:13:47,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:47,534 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2018-12-03 17:13:47,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-12-03 17:13:47,534 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 88 [2018-12-03 17:13:47,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:47,535 INFO L225 Difference]: With dead ends: 100 [2018-12-03 17:13:47,535 INFO L226 Difference]: Without dead ends: 98 [2018-12-03 17:13:47,536 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 17:13:47,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-12-03 17:13:47,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2018-12-03 17:13:47,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-12-03 17:13:47,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2018-12-03 17:13:47,541 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 88 [2018-12-03 17:13:47,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:47,541 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2018-12-03 17:13:47,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-12-03 17:13:47,541 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2018-12-03 17:13:47,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-12-03 17:13:47,542 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:47,542 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1] [2018-12-03 17:13:47,543 INFO L423 AbstractCegarLoop]: === Iteration 20 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:47,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:47,543 INFO L82 PathProgramCache]: Analyzing trace with hash 38689376, now seen corresponding path program 18 times [2018-12-03 17:13:47,543 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:47,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:47,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:47,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:47,544 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:48,203 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:48,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:48,204 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:48,204 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:48,204 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:48,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:48,204 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:48,223 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:13:48,223 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:13:48,271 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:13:48,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:48,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:49,303 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:50,525 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:50,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 112 [2018-12-03 17:13:50,525 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:50,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-12-03 17:13:50,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-12-03 17:13:50,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3646, Invalid=9010, Unknown=0, NotChecked=0, Total=12656 [2018-12-03 17:13:50,527 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand 76 states. [2018-12-03 17:13:50,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:50,835 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2018-12-03 17:13:50,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-12-03 17:13:50,835 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 93 [2018-12-03 17:13:50,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:50,836 INFO L225 Difference]: With dead ends: 105 [2018-12-03 17:13:50,836 INFO L226 Difference]: Without dead ends: 103 [2018-12-03 17:13:50,837 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7083 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3646, Invalid=9010, Unknown=0, NotChecked=0, Total=12656 [2018-12-03 17:13:50,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-12-03 17:13:50,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-12-03 17:13:50,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-12-03 17:13:50,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2018-12-03 17:13:50,842 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 93 [2018-12-03 17:13:50,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:50,842 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2018-12-03 17:13:50,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-12-03 17:13:50,843 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2018-12-03 17:13:50,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-12-03 17:13:50,843 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:50,844 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1] [2018-12-03 17:13:50,844 INFO L423 AbstractCegarLoop]: === Iteration 21 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:50,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:50,844 INFO L82 PathProgramCache]: Analyzing trace with hash 281420652, now seen corresponding path program 19 times [2018-12-03 17:13:50,844 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:50,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:50,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:50,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:50,845 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:51,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:51,521 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:51,521 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:51,521 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:51,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:51,522 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:51,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:51,530 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:13:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:51,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:52,867 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:54,222 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:54,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:54,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 118 [2018-12-03 17:13:54,241 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:54,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-12-03 17:13:54,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-12-03 17:13:54,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4038, Invalid=10004, Unknown=0, NotChecked=0, Total=14042 [2018-12-03 17:13:54,243 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand 80 states. [2018-12-03 17:13:54,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:54,565 INFO L93 Difference]: Finished difference Result 110 states and 131 transitions. [2018-12-03 17:13:54,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-12-03 17:13:54,566 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 98 [2018-12-03 17:13:54,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:54,566 INFO L225 Difference]: With dead ends: 110 [2018-12-03 17:13:54,567 INFO L226 Difference]: Without dead ends: 108 [2018-12-03 17:13:54,568 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7885 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4038, Invalid=10004, Unknown=0, NotChecked=0, Total=14042 [2018-12-03 17:13:54,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-12-03 17:13:54,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2018-12-03 17:13:54,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-12-03 17:13:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2018-12-03 17:13:54,571 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 98 [2018-12-03 17:13:54,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:54,572 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2018-12-03 17:13:54,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-12-03 17:13:54,572 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2018-12-03 17:13:54,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-12-03 17:13:54,573 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:54,573 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1] [2018-12-03 17:13:54,573 INFO L423 AbstractCegarLoop]: === Iteration 22 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:54,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:54,574 INFO L82 PathProgramCache]: Analyzing trace with hash -2025971232, now seen corresponding path program 20 times [2018-12-03 17:13:54,574 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:54,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:54,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:13:54,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:54,575 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:13:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:55,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:55,288 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:13:55,288 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:13:55,288 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:13:55,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:13:55,288 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:13:55,297 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:13:55,297 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:13:55,327 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-12-03 17:13:55,327 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:13:55,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:13:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:57,905 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:13:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:13:59,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:13:59,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 124 [2018-12-03 17:13:59,527 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:13:59,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-12-03 17:13:59,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-12-03 17:13:59,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4450, Invalid=11050, Unknown=0, NotChecked=0, Total=15500 [2018-12-03 17:13:59,528 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand 84 states. [2018-12-03 17:13:59,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:13:59,875 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2018-12-03 17:13:59,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-12-03 17:13:59,876 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 103 [2018-12-03 17:13:59,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:13:59,877 INFO L225 Difference]: With dead ends: 115 [2018-12-03 17:13:59,878 INFO L226 Difference]: Without dead ends: 113 [2018-12-03 17:13:59,879 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8730 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4450, Invalid=11050, Unknown=0, NotChecked=0, Total=15500 [2018-12-03 17:13:59,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-12-03 17:13:59,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2018-12-03 17:13:59,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-12-03 17:13:59,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2018-12-03 17:13:59,884 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 103 [2018-12-03 17:13:59,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:13:59,884 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2018-12-03 17:13:59,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-12-03 17:13:59,884 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2018-12-03 17:13:59,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-12-03 17:13:59,885 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:13:59,885 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1] [2018-12-03 17:13:59,885 INFO L423 AbstractCegarLoop]: === Iteration 23 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:13:59,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:13:59,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1207497748, now seen corresponding path program 21 times [2018-12-03 17:13:59,885 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:13:59,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:59,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:13:59,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:13:59,886 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:13:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:00,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:00,727 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:14:00,727 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:14:00,727 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:14:00,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:00,727 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:14:00,735 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:14:00,736 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:14:00,759 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:14:00,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:14:00,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:14:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:02,113 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:14:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:04,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:14:04,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 130 [2018-12-03 17:14:04,082 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:14:04,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-12-03 17:14:04,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-12-03 17:14:04,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4882, Invalid=12148, Unknown=0, NotChecked=0, Total=17030 [2018-12-03 17:14:04,084 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand 88 states. [2018-12-03 17:14:04,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:14:04,452 INFO L93 Difference]: Finished difference Result 120 states and 143 transitions. [2018-12-03 17:14:04,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-12-03 17:14:04,453 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 108 [2018-12-03 17:14:04,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:14:04,454 INFO L225 Difference]: With dead ends: 120 [2018-12-03 17:14:04,454 INFO L226 Difference]: Without dead ends: 118 [2018-12-03 17:14:04,455 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9618 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4882, Invalid=12148, Unknown=0, NotChecked=0, Total=17030 [2018-12-03 17:14:04,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-12-03 17:14:04,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2018-12-03 17:14:04,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-12-03 17:14:04,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2018-12-03 17:14:04,458 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 108 [2018-12-03 17:14:04,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:14:04,459 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2018-12-03 17:14:04,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-12-03 17:14:04,459 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2018-12-03 17:14:04,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-12-03 17:14:04,460 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:14:04,460 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1] [2018-12-03 17:14:04,460 INFO L423 AbstractCegarLoop]: === Iteration 24 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:14:04,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:14:04,460 INFO L82 PathProgramCache]: Analyzing trace with hash 649759072, now seen corresponding path program 22 times [2018-12-03 17:14:04,461 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:14:04,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:04,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:14:04,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:04,462 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:14:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:05,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:05,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:05,473 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:14:05,473 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:14:05,474 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:14:05,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:05,474 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:14:05,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:14:05,482 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:14:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:05,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:14:07,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:07,065 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:14:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:09,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:14:09,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 136 [2018-12-03 17:14:09,179 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:14:09,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-12-03 17:14:09,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-12-03 17:14:09,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5334, Invalid=13298, Unknown=0, NotChecked=0, Total=18632 [2018-12-03 17:14:09,181 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand 92 states. [2018-12-03 17:14:09,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:14:09,560 INFO L93 Difference]: Finished difference Result 125 states and 149 transitions. [2018-12-03 17:14:09,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-12-03 17:14:09,560 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 113 [2018-12-03 17:14:09,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:14:09,561 INFO L225 Difference]: With dead ends: 125 [2018-12-03 17:14:09,561 INFO L226 Difference]: Without dead ends: 123 [2018-12-03 17:14:09,563 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10549 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5334, Invalid=13298, Unknown=0, NotChecked=0, Total=18632 [2018-12-03 17:14:09,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-12-03 17:14:09,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-12-03 17:14:09,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-12-03 17:14:09,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2018-12-03 17:14:09,570 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 113 [2018-12-03 17:14:09,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:14:09,570 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2018-12-03 17:14:09,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-12-03 17:14:09,570 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2018-12-03 17:14:09,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-12-03 17:14:09,571 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:14:09,571 INFO L402 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1] [2018-12-03 17:14:09,571 INFO L423 AbstractCegarLoop]: === Iteration 25 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:14:09,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:14:09,571 INFO L82 PathProgramCache]: Analyzing trace with hash 60773484, now seen corresponding path program 23 times [2018-12-03 17:14:09,572 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:14:09,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:09,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:14:09,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:09,572 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:14:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:10,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:10,638 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:14:10,638 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:14:10,638 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:14:10,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:10,639 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:14:10,648 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:14:10,648 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:14:10,685 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-12-03 17:14:10,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:14:10,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:14:12,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:12,275 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:14:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:14,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:14:14,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 142 [2018-12-03 17:14:14,472 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:14:14,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-12-03 17:14:14,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-12-03 17:14:14,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5806, Invalid=14500, Unknown=0, NotChecked=0, Total=20306 [2018-12-03 17:14:14,475 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand 96 states. [2018-12-03 17:14:14,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:14:14,934 INFO L93 Difference]: Finished difference Result 130 states and 155 transitions. [2018-12-03 17:14:14,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-12-03 17:14:14,935 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 118 [2018-12-03 17:14:14,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:14:14,936 INFO L225 Difference]: With dead ends: 130 [2018-12-03 17:14:14,936 INFO L226 Difference]: Without dead ends: 128 [2018-12-03 17:14:14,937 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11523 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5806, Invalid=14500, Unknown=0, NotChecked=0, Total=20306 [2018-12-03 17:14:14,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-12-03 17:14:14,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2018-12-03 17:14:14,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-12-03 17:14:14,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2018-12-03 17:14:14,943 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 118 [2018-12-03 17:14:14,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:14:14,943 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2018-12-03 17:14:14,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-12-03 17:14:14,943 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2018-12-03 17:14:14,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-12-03 17:14:14,944 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:14:14,944 INFO L402 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1] [2018-12-03 17:14:14,944 INFO L423 AbstractCegarLoop]: === Iteration 26 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:14:14,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:14:14,945 INFO L82 PathProgramCache]: Analyzing trace with hash 293310688, now seen corresponding path program 24 times [2018-12-03 17:14:14,945 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:14:14,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:14,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:14:14,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:14,946 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:14:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:16,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:16,042 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:14:16,042 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:14:16,042 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:14:16,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:16,042 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:14:16,051 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:14:16,051 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:14:16,077 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:14:16,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:14:16,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:14:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:18,203 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:14:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:20,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:14:20,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 148 [2018-12-03 17:14:20,309 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:14:20,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-12-03 17:14:20,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-12-03 17:14:20,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6298, Invalid=15754, Unknown=0, NotChecked=0, Total=22052 [2018-12-03 17:14:20,311 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand 100 states. [2018-12-03 17:14:20,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:14:20,918 INFO L93 Difference]: Finished difference Result 135 states and 161 transitions. [2018-12-03 17:14:20,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-12-03 17:14:20,918 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 123 [2018-12-03 17:14:20,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:14:20,919 INFO L225 Difference]: With dead ends: 135 [2018-12-03 17:14:20,919 INFO L226 Difference]: Without dead ends: 133 [2018-12-03 17:14:20,921 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 17:14:20,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-12-03 17:14:20,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2018-12-03 17:14:20,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-12-03 17:14:20,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2018-12-03 17:14:20,926 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 123 [2018-12-03 17:14:20,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:14:20,926 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2018-12-03 17:14:20,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-12-03 17:14:20,926 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2018-12-03 17:14:20,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-12-03 17:14:20,927 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:14:20,927 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1] [2018-12-03 17:14:20,927 INFO L423 AbstractCegarLoop]: === Iteration 27 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:14:20,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:14:20,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1977023724, now seen corresponding path program 25 times [2018-12-03 17:14:20,927 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:14:20,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:20,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:14:20,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:20,928 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:14:20,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:21,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:21,938 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:14:21,938 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:14:21,938 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:14:21,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:21,939 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:14:21,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:14:21,947 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:14:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:21,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:14:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:24,195 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:14:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:26,502 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:14:26,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 154 [2018-12-03 17:14:26,503 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:14:26,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-12-03 17:14:26,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-12-03 17:14:26,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6810, Invalid=17060, Unknown=0, NotChecked=0, Total=23870 [2018-12-03 17:14:26,506 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand 104 states. [2018-12-03 17:14:27,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:14:27,016 INFO L93 Difference]: Finished difference Result 140 states and 167 transitions. [2018-12-03 17:14:27,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-12-03 17:14:27,016 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 128 [2018-12-03 17:14:27,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:14:27,017 INFO L225 Difference]: With dead ends: 140 [2018-12-03 17:14:27,017 INFO L226 Difference]: Without dead ends: 138 [2018-12-03 17:14:27,019 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13600 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6810, Invalid=17060, Unknown=0, NotChecked=0, Total=23870 [2018-12-03 17:14:27,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-12-03 17:14:27,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2018-12-03 17:14:27,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-12-03 17:14:27,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 160 transitions. [2018-12-03 17:14:27,024 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 160 transitions. Word has length 128 [2018-12-03 17:14:27,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:14:27,024 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 160 transitions. [2018-12-03 17:14:27,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-12-03 17:14:27,025 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 160 transitions. [2018-12-03 17:14:27,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-12-03 17:14:27,025 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:14:27,025 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1] [2018-12-03 17:14:27,026 INFO L423 AbstractCegarLoop]: === Iteration 28 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:14:27,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:14:27,026 INFO L82 PathProgramCache]: Analyzing trace with hash -231131040, now seen corresponding path program 26 times [2018-12-03 17:14:27,026 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:14:27,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:27,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:14:27,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:27,027 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:14:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:28,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:28,566 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:14:28,566 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:14:28,566 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:14:28,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:28,566 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:14:28,576 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:14:28,576 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:14:28,628 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-12-03 17:14:28,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:14:28,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:14:30,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:30,905 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:14:33,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:33,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:14:33,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 160 [2018-12-03 17:14:33,865 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:14:33,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-12-03 17:14:33,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-12-03 17:14:33,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7342, Invalid=18418, Unknown=0, NotChecked=0, Total=25760 [2018-12-03 17:14:33,868 INFO L87 Difference]: Start difference. First operand 134 states and 160 transitions. Second operand 108 states. [2018-12-03 17:14:34,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:14:34,753 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2018-12-03 17:14:34,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-12-03 17:14:34,754 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 133 [2018-12-03 17:14:34,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:14:34,754 INFO L225 Difference]: With dead ends: 145 [2018-12-03 17:14:34,755 INFO L226 Difference]: Without dead ends: 143 [2018-12-03 17:14:34,756 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14703 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=7342, Invalid=18418, Unknown=0, NotChecked=0, Total=25760 [2018-12-03 17:14:34,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-12-03 17:14:34,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-12-03 17:14:34,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-12-03 17:14:34,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2018-12-03 17:14:34,760 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 133 [2018-12-03 17:14:34,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:14:34,760 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2018-12-03 17:14:34,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-12-03 17:14:34,761 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2018-12-03 17:14:34,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-12-03 17:14:34,761 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:14:34,761 INFO L402 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1] [2018-12-03 17:14:34,761 INFO L423 AbstractCegarLoop]: === Iteration 29 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:14:34,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:14:34,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1458963820, now seen corresponding path program 27 times [2018-12-03 17:14:34,762 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:14:34,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:34,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:14:34,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:34,763 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:14:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:37,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:37,349 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:14:37,349 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:14:37,349 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:14:37,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:37,349 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:14:37,358 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:14:37,359 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:14:37,396 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:14:37,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:14:37,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:14:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:39,750 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:14:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:42,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:14:42,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 166 [2018-12-03 17:14:42,368 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:14:42,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-12-03 17:14:42,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-12-03 17:14:42,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7894, Invalid=19828, Unknown=0, NotChecked=0, Total=27722 [2018-12-03 17:14:42,371 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand 112 states. [2018-12-03 17:14:42,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:14:42,944 INFO L93 Difference]: Finished difference Result 150 states and 179 transitions. [2018-12-03 17:14:42,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-12-03 17:14:42,945 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 138 [2018-12-03 17:14:42,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:14:42,946 INFO L225 Difference]: With dead ends: 150 [2018-12-03 17:14:42,946 INFO L226 Difference]: Without dead ends: 148 [2018-12-03 17:14:42,947 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15849 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=7894, Invalid=19828, Unknown=0, NotChecked=0, Total=27722 [2018-12-03 17:14:42,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-12-03 17:14:42,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2018-12-03 17:14:42,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-12-03 17:14:42,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 172 transitions. [2018-12-03 17:14:42,952 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 172 transitions. Word has length 138 [2018-12-03 17:14:42,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:14:42,952 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 172 transitions. [2018-12-03 17:14:42,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-12-03 17:14:42,953 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 172 transitions. [2018-12-03 17:14:42,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-12-03 17:14:42,953 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:14:42,954 INFO L402 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1] [2018-12-03 17:14:42,954 INFO L423 AbstractCegarLoop]: === Iteration 30 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:14:42,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:14:42,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1839955936, now seen corresponding path program 28 times [2018-12-03 17:14:42,954 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:14:42,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:42,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:14:42,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:42,955 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:14:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:44,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:44,605 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:14:44,606 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:14:44,606 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:14:44,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:44,606 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:14:44,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:14:44,616 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:14:44,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:44,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:14:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:46,837 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:14:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:49,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:14:49,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 172 [2018-12-03 17:14:49,930 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:14:49,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-12-03 17:14:49,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-12-03 17:14:49,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8466, Invalid=21290, Unknown=0, NotChecked=0, Total=29756 [2018-12-03 17:14:49,934 INFO L87 Difference]: Start difference. First operand 144 states and 172 transitions. Second operand 116 states. [2018-12-03 17:14:50,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:14:50,530 INFO L93 Difference]: Finished difference Result 155 states and 185 transitions. [2018-12-03 17:14:50,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-12-03 17:14:50,530 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 143 [2018-12-03 17:14:50,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:14:50,531 INFO L225 Difference]: With dead ends: 155 [2018-12-03 17:14:50,531 INFO L226 Difference]: Without dead ends: 153 [2018-12-03 17:14:50,533 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17038 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=8466, Invalid=21290, Unknown=0, NotChecked=0, Total=29756 [2018-12-03 17:14:50,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-12-03 17:14:50,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2018-12-03 17:14:50,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-12-03 17:14:50,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 178 transitions. [2018-12-03 17:14:50,539 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 178 transitions. Word has length 143 [2018-12-03 17:14:50,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:14:50,540 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 178 transitions. [2018-12-03 17:14:50,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-12-03 17:14:50,540 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 178 transitions. [2018-12-03 17:14:50,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-12-03 17:14:50,541 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:14:50,541 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1] [2018-12-03 17:14:50,541 INFO L423 AbstractCegarLoop]: === Iteration 31 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:14:50,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:14:50,541 INFO L82 PathProgramCache]: Analyzing trace with hash 893677036, now seen corresponding path program 29 times [2018-12-03 17:14:50,541 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:14:50,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:50,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:14:50,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:50,542 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:14:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:14:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:51,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:51,890 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:14:51,890 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:14:51,890 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:14:51,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:14:51,890 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:14:51,899 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:14:51,900 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:14:51,959 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-12-03 17:14:51,960 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:14:51,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:14:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:54,493 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:14:57,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:14:57,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:14:57,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 178 [2018-12-03 17:14:57,657 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:14:57,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-12-03 17:14:57,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-12-03 17:14:57,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9058, Invalid=22804, Unknown=0, NotChecked=0, Total=31862 [2018-12-03 17:14:57,659 INFO L87 Difference]: Start difference. First operand 149 states and 178 transitions. Second operand 120 states. [2018-12-03 17:14:58,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:14:58,490 INFO L93 Difference]: Finished difference Result 160 states and 191 transitions. [2018-12-03 17:14:58,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-12-03 17:14:58,491 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 148 [2018-12-03 17:14:58,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:14:58,492 INFO L225 Difference]: With dead ends: 160 [2018-12-03 17:14:58,492 INFO L226 Difference]: Without dead ends: 158 [2018-12-03 17:14:58,493 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18270 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=9058, Invalid=22804, Unknown=0, NotChecked=0, Total=31862 [2018-12-03 17:14:58,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-12-03 17:14:58,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2018-12-03 17:14:58,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-12-03 17:14:58,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 184 transitions. [2018-12-03 17:14:58,498 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 184 transitions. Word has length 148 [2018-12-03 17:14:58,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:14:58,499 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 184 transitions. [2018-12-03 17:14:58,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-12-03 17:14:58,499 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 184 transitions. [2018-12-03 17:14:58,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-12-03 17:14:58,499 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:14:58,499 INFO L402 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1] [2018-12-03 17:14:58,500 INFO L423 AbstractCegarLoop]: === Iteration 32 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:14:58,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:14:58,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1567987872, now seen corresponding path program 30 times [2018-12-03 17:14:58,500 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:14:58,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:58,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:14:58,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:14:58,502 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:14:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:15:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:00,133 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:00,133 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:15:00,133 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:15:00,133 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:15:00,133 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:00,134 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:15:00,142 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:15:00,142 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:15:00,175 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:15:00,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:15:00,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:15:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:02,582 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:15:06,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:06,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:15:06,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 184 [2018-12-03 17:15:06,100 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:15:06,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-12-03 17:15:06,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-12-03 17:15:06,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9670, Invalid=24370, Unknown=0, NotChecked=0, Total=34040 [2018-12-03 17:15:06,102 INFO L87 Difference]: Start difference. First operand 154 states and 184 transitions. Second operand 124 states. [2018-12-03 17:15:06,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:15:06,759 INFO L93 Difference]: Finished difference Result 165 states and 197 transitions. [2018-12-03 17:15:06,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-12-03 17:15:06,759 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 153 [2018-12-03 17:15:06,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:15:06,760 INFO L225 Difference]: With dead ends: 165 [2018-12-03 17:15:06,760 INFO L226 Difference]: Without dead ends: 163 [2018-12-03 17:15:06,762 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19545 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=9670, Invalid=24370, Unknown=0, NotChecked=0, Total=34040 [2018-12-03 17:15:06,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-12-03 17:15:06,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-12-03 17:15:06,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-12-03 17:15:06,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 190 transitions. [2018-12-03 17:15:06,768 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 190 transitions. Word has length 153 [2018-12-03 17:15:06,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:15:06,769 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 190 transitions. [2018-12-03 17:15:06,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-12-03 17:15:06,769 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 190 transitions. [2018-12-03 17:15:06,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-12-03 17:15:06,770 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:15:06,770 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1] [2018-12-03 17:15:06,770 INFO L423 AbstractCegarLoop]: === Iteration 33 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:15:06,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:15:06,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1695168108, now seen corresponding path program 31 times [2018-12-03 17:15:06,771 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:15:06,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:06,771 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:15:06,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:06,772 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:15:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:15:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:08,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:08,295 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:15:08,295 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:15:08,295 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:15:08,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:08,295 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:15:08,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:15:08,306 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:15:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:15:08,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:15:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:11,155 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:15:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:14,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:15:14,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 190 [2018-12-03 17:15:14,930 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:15:14,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-12-03 17:15:14,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-12-03 17:15:14,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10302, Invalid=25988, Unknown=0, NotChecked=0, Total=36290 [2018-12-03 17:15:14,935 INFO L87 Difference]: Start difference. First operand 159 states and 190 transitions. Second operand 128 states. [2018-12-03 17:15:15,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:15:15,596 INFO L93 Difference]: Finished difference Result 170 states and 203 transitions. [2018-12-03 17:15:15,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-12-03 17:15:15,597 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 158 [2018-12-03 17:15:15,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:15:15,598 INFO L225 Difference]: With dead ends: 170 [2018-12-03 17:15:15,598 INFO L226 Difference]: Without dead ends: 168 [2018-12-03 17:15:15,600 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20863 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=10302, Invalid=25988, Unknown=0, NotChecked=0, Total=36290 [2018-12-03 17:15:15,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-12-03 17:15:15,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2018-12-03 17:15:15,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-12-03 17:15:15,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 196 transitions. [2018-12-03 17:15:15,606 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 196 transitions. Word has length 158 [2018-12-03 17:15:15,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:15:15,607 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 196 transitions. [2018-12-03 17:15:15,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-12-03 17:15:15,607 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 196 transitions. [2018-12-03 17:15:15,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-12-03 17:15:15,608 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:15:15,608 INFO L402 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1] [2018-12-03 17:15:15,608 INFO L423 AbstractCegarLoop]: === Iteration 34 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:15:15,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:15:15,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1450316064, now seen corresponding path program 32 times [2018-12-03 17:15:15,609 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:15:15,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:15,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:15:15,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:15,610 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:15:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:15:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:17,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:17,169 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:15:17,169 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:15:17,169 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:15:17,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:17,169 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:15:17,177 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:15:17,177 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:15:17,603 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-12-03 17:15:17,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:15:17,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:15:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:20,653 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:15:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:24,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:15:24,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 196 [2018-12-03 17:15:24,460 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:15:24,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-12-03 17:15:24,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-12-03 17:15:24,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10954, Invalid=27658, Unknown=0, NotChecked=0, Total=38612 [2018-12-03 17:15:24,464 INFO L87 Difference]: Start difference. First operand 164 states and 196 transitions. Second operand 132 states. [2018-12-03 17:15:25,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:15:25,197 INFO L93 Difference]: Finished difference Result 175 states and 209 transitions. [2018-12-03 17:15:25,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-12-03 17:15:25,197 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 163 [2018-12-03 17:15:25,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:15:25,199 INFO L225 Difference]: With dead ends: 175 [2018-12-03 17:15:25,199 INFO L226 Difference]: Without dead ends: 173 [2018-12-03 17:15:25,201 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22224 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=10954, Invalid=27658, Unknown=0, NotChecked=0, Total=38612 [2018-12-03 17:15:25,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-12-03 17:15:25,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2018-12-03 17:15:25,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-12-03 17:15:25,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 202 transitions. [2018-12-03 17:15:25,208 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 202 transitions. Word has length 163 [2018-12-03 17:15:25,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:15:25,208 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 202 transitions. [2018-12-03 17:15:25,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-12-03 17:15:25,208 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 202 transitions. [2018-12-03 17:15:25,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-12-03 17:15:25,209 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:15:25,209 INFO L402 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1] [2018-12-03 17:15:25,209 INFO L423 AbstractCegarLoop]: === Iteration 35 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:15:25,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:15:25,210 INFO L82 PathProgramCache]: Analyzing trace with hash -2138087700, now seen corresponding path program 33 times [2018-12-03 17:15:25,210 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:15:25,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:25,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:15:25,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:25,211 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:15:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:15:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:27,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:27,397 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:15:27,398 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:15:27,398 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:15:27,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:27,398 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:15:27,407 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:15:27,407 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:15:27,447 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:15:27,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:15:27,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:15:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:30,585 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:15:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:34,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:15:34,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 202 [2018-12-03 17:15:34,740 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:15:34,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-12-03 17:15:34,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-12-03 17:15:34,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11626, Invalid=29380, Unknown=0, NotChecked=0, Total=41006 [2018-12-03 17:15:34,744 INFO L87 Difference]: Start difference. First operand 169 states and 202 transitions. Second operand 136 states. [2018-12-03 17:15:35,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:15:35,579 INFO L93 Difference]: Finished difference Result 180 states and 215 transitions. [2018-12-03 17:15:35,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-12-03 17:15:35,579 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 168 [2018-12-03 17:15:35,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:15:35,580 INFO L225 Difference]: With dead ends: 180 [2018-12-03 17:15:35,581 INFO L226 Difference]: Without dead ends: 178 [2018-12-03 17:15:35,582 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23628 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=11626, Invalid=29380, Unknown=0, NotChecked=0, Total=41006 [2018-12-03 17:15:35,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-12-03 17:15:35,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2018-12-03 17:15:35,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-12-03 17:15:35,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 208 transitions. [2018-12-03 17:15:35,589 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 208 transitions. Word has length 168 [2018-12-03 17:15:35,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:15:35,590 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 208 transitions. [2018-12-03 17:15:35,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-12-03 17:15:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 208 transitions. [2018-12-03 17:15:35,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-12-03 17:15:35,591 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:15:35,591 INFO L402 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1] [2018-12-03 17:15:35,591 INFO L423 AbstractCegarLoop]: === Iteration 36 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:15:35,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:15:35,592 INFO L82 PathProgramCache]: Analyzing trace with hash 359536224, now seen corresponding path program 34 times [2018-12-03 17:15:35,592 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:15:35,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:35,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:15:35,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:35,593 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:15:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:15:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:37,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:37,352 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:15:37,352 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:15:37,352 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:15:37,353 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:37,353 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:15:37,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:15:37,362 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:15:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:15:37,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:15:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:41,059 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:15:45,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:45,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:15:45,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 208 [2018-12-03 17:15:45,426 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:15:45,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-12-03 17:15:45,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-12-03 17:15:45,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12318, Invalid=31154, Unknown=0, NotChecked=0, Total=43472 [2018-12-03 17:15:45,430 INFO L87 Difference]: Start difference. First operand 174 states and 208 transitions. Second operand 140 states. [2018-12-03 17:15:46,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:15:46,480 INFO L93 Difference]: Finished difference Result 185 states and 221 transitions. [2018-12-03 17:15:46,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-12-03 17:15:46,480 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 173 [2018-12-03 17:15:46,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:15:46,481 INFO L225 Difference]: With dead ends: 185 [2018-12-03 17:15:46,481 INFO L226 Difference]: Without dead ends: 183 [2018-12-03 17:15:46,485 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25075 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=12318, Invalid=31154, Unknown=0, NotChecked=0, Total=43472 [2018-12-03 17:15:46,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-12-03 17:15:46,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-12-03 17:15:46,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-12-03 17:15:46,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 214 transitions. [2018-12-03 17:15:46,491 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 214 transitions. Word has length 173 [2018-12-03 17:15:46,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:15:46,491 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 214 transitions. [2018-12-03 17:15:46,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-12-03 17:15:46,492 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 214 transitions. [2018-12-03 17:15:46,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-12-03 17:15:46,492 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:15:46,493 INFO L402 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1] [2018-12-03 17:15:46,493 INFO L423 AbstractCegarLoop]: === Iteration 37 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:15:46,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:15:46,493 INFO L82 PathProgramCache]: Analyzing trace with hash -400824468, now seen corresponding path program 35 times [2018-12-03 17:15:46,493 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:15:46,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:46,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:15:46,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:46,494 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:15:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:15:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:49,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:49,549 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:15:49,549 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:15:49,549 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:15:49,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:15:49,550 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:15:49,558 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:15:49,558 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:15:49,742 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-12-03 17:15:49,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:15:49,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:15:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:53,525 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:15:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:15:58,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:15:58,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 214 [2018-12-03 17:15:58,084 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:15:58,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-12-03 17:15:58,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-12-03 17:15:58,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13030, Invalid=32980, Unknown=0, NotChecked=0, Total=46010 [2018-12-03 17:15:58,087 INFO L87 Difference]: Start difference. First operand 179 states and 214 transitions. Second operand 144 states. [2018-12-03 17:15:58,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:15:58,974 INFO L93 Difference]: Finished difference Result 190 states and 227 transitions. [2018-12-03 17:15:58,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-12-03 17:15:58,975 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 178 [2018-12-03 17:15:58,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:15:58,976 INFO L225 Difference]: With dead ends: 190 [2018-12-03 17:15:58,976 INFO L226 Difference]: Without dead ends: 188 [2018-12-03 17:15:58,978 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26565 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=13030, Invalid=32980, Unknown=0, NotChecked=0, Total=46010 [2018-12-03 17:15:58,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-12-03 17:15:58,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2018-12-03 17:15:58,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-12-03 17:15:58,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2018-12-03 17:15:58,985 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 178 [2018-12-03 17:15:58,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:15:58,985 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2018-12-03 17:15:58,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-12-03 17:15:58,986 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2018-12-03 17:15:58,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-12-03 17:15:58,987 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:15:58,987 INFO L402 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1] [2018-12-03 17:15:58,987 INFO L423 AbstractCegarLoop]: === Iteration 38 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:15:58,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:15:58,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1927470560, now seen corresponding path program 36 times [2018-12-03 17:15:58,987 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:15:58,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:58,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:15:58,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:15:58,988 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:15:58,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:16:01,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:01,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:01,348 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:16:01,348 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:16:01,348 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:16:01,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:01,348 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:16:01,356 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:16:01,357 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:16:01,398 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:16:01,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:16:01,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:16:04,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:04,771 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:16:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:09,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:16:09,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 220 [2018-12-03 17:16:09,743 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:16:09,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-12-03 17:16:09,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-12-03 17:16:09,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13762, Invalid=34858, Unknown=0, NotChecked=0, Total=48620 [2018-12-03 17:16:09,746 INFO L87 Difference]: Start difference. First operand 184 states and 220 transitions. Second operand 148 states. [2018-12-03 17:16:10,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:16:10,746 INFO L93 Difference]: Finished difference Result 195 states and 233 transitions. [2018-12-03 17:16:10,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-12-03 17:16:10,746 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 183 [2018-12-03 17:16:10,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:16:10,747 INFO L225 Difference]: With dead ends: 195 [2018-12-03 17:16:10,747 INFO L226 Difference]: Without dead ends: 193 [2018-12-03 17:16:10,749 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28098 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=13762, Invalid=34858, Unknown=0, NotChecked=0, Total=48620 [2018-12-03 17:16:10,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-12-03 17:16:10,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2018-12-03 17:16:10,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-12-03 17:16:10,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 226 transitions. [2018-12-03 17:16:10,755 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 226 transitions. Word has length 183 [2018-12-03 17:16:10,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:16:10,756 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 226 transitions. [2018-12-03 17:16:10,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-12-03 17:16:10,756 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 226 transitions. [2018-12-03 17:16:10,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-12-03 17:16:10,757 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:16:10,757 INFO L402 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1] [2018-12-03 17:16:10,757 INFO L423 AbstractCegarLoop]: === Iteration 39 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:16:10,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:16:10,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1106759660, now seen corresponding path program 37 times [2018-12-03 17:16:10,758 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:16:10,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:16:10,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:16:10,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:16:10,759 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:16:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:16:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:13,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:13,314 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:16:13,314 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:16:13,314 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:16:13,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:13,314 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:16:13,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:16:13,326 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:16:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:16:13,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:16:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:17,290 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:16:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:22,341 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:16:22,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 226 [2018-12-03 17:16:22,341 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:16:22,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-12-03 17:16:22,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-12-03 17:16:22,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14514, Invalid=36788, Unknown=0, NotChecked=0, Total=51302 [2018-12-03 17:16:22,345 INFO L87 Difference]: Start difference. First operand 189 states and 226 transitions. Second operand 152 states. [2018-12-03 17:16:23,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:16:23,615 INFO L93 Difference]: Finished difference Result 200 states and 239 transitions. [2018-12-03 17:16:23,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-12-03 17:16:23,615 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 188 [2018-12-03 17:16:23,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:16:23,616 INFO L225 Difference]: With dead ends: 200 [2018-12-03 17:16:23,616 INFO L226 Difference]: Without dead ends: 198 [2018-12-03 17:16:23,618 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29674 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=14514, Invalid=36788, Unknown=0, NotChecked=0, Total=51302 [2018-12-03 17:16:23,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-12-03 17:16:23,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2018-12-03 17:16:23,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-12-03 17:16:23,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 232 transitions. [2018-12-03 17:16:23,625 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 232 transitions. Word has length 188 [2018-12-03 17:16:23,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:16:23,625 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 232 transitions. [2018-12-03 17:16:23,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-12-03 17:16:23,625 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 232 transitions. [2018-12-03 17:16:23,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-12-03 17:16:23,626 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:16:23,626 INFO L402 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1] [2018-12-03 17:16:23,627 INFO L423 AbstractCegarLoop]: === Iteration 40 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:16:23,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:16:23,627 INFO L82 PathProgramCache]: Analyzing trace with hash -928758432, now seen corresponding path program 38 times [2018-12-03 17:16:23,627 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:16:23,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:16:23,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:16:23,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:16:23,628 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:16:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:16:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:26,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:26,077 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:16:26,077 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:16:26,077 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:16:26,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:26,077 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:16:26,086 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:16:26,086 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:16:26,146 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-12-03 17:16:26,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:16:26,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:16:29,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:29,773 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:16:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:35,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:16:35,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 232 [2018-12-03 17:16:35,062 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:16:35,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-12-03 17:16:35,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-12-03 17:16:35,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15286, Invalid=38770, Unknown=0, NotChecked=0, Total=54056 [2018-12-03 17:16:35,065 INFO L87 Difference]: Start difference. First operand 194 states and 232 transitions. Second operand 156 states. [2018-12-03 17:16:36,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:16:36,250 INFO L93 Difference]: Finished difference Result 205 states and 245 transitions. [2018-12-03 17:16:36,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-12-03 17:16:36,251 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 193 [2018-12-03 17:16:36,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:16:36,252 INFO L225 Difference]: With dead ends: 205 [2018-12-03 17:16:36,252 INFO L226 Difference]: Without dead ends: 203 [2018-12-03 17:16:36,254 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31293 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=15286, Invalid=38770, Unknown=0, NotChecked=0, Total=54056 [2018-12-03 17:16:36,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-12-03 17:16:36,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-12-03 17:16:36,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-12-03 17:16:36,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 238 transitions. [2018-12-03 17:16:36,261 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 238 transitions. Word has length 193 [2018-12-03 17:16:36,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:16:36,261 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 238 transitions. [2018-12-03 17:16:36,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-12-03 17:16:36,261 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 238 transitions. [2018-12-03 17:16:36,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-12-03 17:16:36,262 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:16:36,262 INFO L402 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1] [2018-12-03 17:16:36,262 INFO L423 AbstractCegarLoop]: === Iteration 41 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:16:36,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:16:36,262 INFO L82 PathProgramCache]: Analyzing trace with hash -93644692, now seen corresponding path program 39 times [2018-12-03 17:16:36,262 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:16:36,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:16:36,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:16:36,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:16:36,263 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:16:36,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:16:38,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:38,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:38,609 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:16:38,610 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:16:38,610 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:16:38,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:38,610 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:16:38,619 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:16:38,620 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:16:38,663 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:16:38,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:16:38,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:16:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:42,632 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:16:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:48,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:16:48,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 238 [2018-12-03 17:16:48,122 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:16:48,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-12-03 17:16:48,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-12-03 17:16:48,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16078, Invalid=40804, Unknown=0, NotChecked=0, Total=56882 [2018-12-03 17:16:48,127 INFO L87 Difference]: Start difference. First operand 199 states and 238 transitions. Second operand 160 states. [2018-12-03 17:16:49,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:16:49,296 INFO L93 Difference]: Finished difference Result 210 states and 251 transitions. [2018-12-03 17:16:49,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-12-03 17:16:49,297 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 198 [2018-12-03 17:16:49,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:16:49,298 INFO L225 Difference]: With dead ends: 210 [2018-12-03 17:16:49,298 INFO L226 Difference]: Without dead ends: 208 [2018-12-03 17:16:49,300 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32955 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=16078, Invalid=40804, Unknown=0, NotChecked=0, Total=56882 [2018-12-03 17:16:49,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-12-03 17:16:49,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2018-12-03 17:16:49,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-12-03 17:16:49,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 244 transitions. [2018-12-03 17:16:49,305 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 244 transitions. Word has length 198 [2018-12-03 17:16:49,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:16:49,305 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 244 transitions. [2018-12-03 17:16:49,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-12-03 17:16:49,305 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 244 transitions. [2018-12-03 17:16:49,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-12-03 17:16:49,306 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:16:49,306 INFO L402 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1] [2018-12-03 17:16:49,306 INFO L423 AbstractCegarLoop]: === Iteration 42 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:16:49,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:16:49,306 INFO L82 PathProgramCache]: Analyzing trace with hash 392842464, now seen corresponding path program 40 times [2018-12-03 17:16:49,306 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:16:49,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:16:49,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:16:49,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:16:49,307 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:16:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:16:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:52,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:52,194 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:16:52,194 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:16:52,194 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:16:52,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:16:52,194 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:16:52,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:16:52,203 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:16:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:16:52,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:16:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:16:56,317 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:17:02,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:02,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:17:02,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 244 [2018-12-03 17:17:02,581 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:17:02,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-12-03 17:17:02,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-12-03 17:17:02,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16890, Invalid=42890, Unknown=0, NotChecked=0, Total=59780 [2018-12-03 17:17:02,585 INFO L87 Difference]: Start difference. First operand 204 states and 244 transitions. Second operand 164 states. [2018-12-03 17:17:03,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:17:03,866 INFO L93 Difference]: Finished difference Result 215 states and 257 transitions. [2018-12-03 17:17:03,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-12-03 17:17:03,867 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 203 [2018-12-03 17:17:03,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:17:03,868 INFO L225 Difference]: With dead ends: 215 [2018-12-03 17:17:03,868 INFO L226 Difference]: Without dead ends: 213 [2018-12-03 17:17:03,871 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34660 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=16890, Invalid=42890, Unknown=0, NotChecked=0, Total=59780 [2018-12-03 17:17:03,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-12-03 17:17:03,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 209. [2018-12-03 17:17:03,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-12-03 17:17:03,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 250 transitions. [2018-12-03 17:17:03,876 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 250 transitions. Word has length 203 [2018-12-03 17:17:03,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:17:03,876 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 250 transitions. [2018-12-03 17:17:03,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-12-03 17:17:03,876 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 250 transitions. [2018-12-03 17:17:03,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-12-03 17:17:03,877 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:17:03,877 INFO L402 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1] [2018-12-03 17:17:03,877 INFO L423 AbstractCegarLoop]: === Iteration 43 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:17:03,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:17:03,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1010974484, now seen corresponding path program 41 times [2018-12-03 17:17:03,878 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:17:03,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:17:03,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:17:03,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:17:03,878 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:17:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:17:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:06,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:17:06,283 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:17:06,283 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:17:06,283 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:17:06,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:17:06,284 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:17:06,291 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:17:06,292 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:17:06,370 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-12-03 17:17:06,371 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:17:06,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:17:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:12,336 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:17:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:18,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:17:18,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84, 84] total 250 [2018-12-03 17:17:18,806 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:17:18,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-12-03 17:17:18,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-12-03 17:17:18,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17722, Invalid=45028, Unknown=0, NotChecked=0, Total=62750 [2018-12-03 17:17:18,808 INFO L87 Difference]: Start difference. First operand 209 states and 250 transitions. Second operand 168 states. [2018-12-03 17:17:20,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:17:20,131 INFO L93 Difference]: Finished difference Result 220 states and 263 transitions. [2018-12-03 17:17:20,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-12-03 17:17:20,131 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 208 [2018-12-03 17:17:20,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:17:20,132 INFO L225 Difference]: With dead ends: 220 [2018-12-03 17:17:20,133 INFO L226 Difference]: Without dead ends: 218 [2018-12-03 17:17:20,134 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36408 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=17722, Invalid=45028, Unknown=0, NotChecked=0, Total=62750 [2018-12-03 17:17:20,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-12-03 17:17:20,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 214. [2018-12-03 17:17:20,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-12-03 17:17:20,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 256 transitions. [2018-12-03 17:17:20,141 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 256 transitions. Word has length 208 [2018-12-03 17:17:20,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:17:20,142 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 256 transitions. [2018-12-03 17:17:20,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-12-03 17:17:20,142 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 256 transitions. [2018-12-03 17:17:20,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-12-03 17:17:20,143 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:17:20,143 INFO L402 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1] [2018-12-03 17:17:20,143 INFO L423 AbstractCegarLoop]: === Iteration 44 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:17:20,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:17:20,144 INFO L82 PathProgramCache]: Analyzing trace with hash -638782368, now seen corresponding path program 42 times [2018-12-03 17:17:20,144 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:17:20,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:17:20,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:17:20,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:17:20,145 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:17:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:17:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:22,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:17:22,975 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:17:22,975 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:17:22,975 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:17:22,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:17:22,975 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:17:22,987 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:17:22,987 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:17:23,036 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:17:23,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:17:23,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:17:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:27,824 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:17:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:34,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:17:34,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86, 86] total 256 [2018-12-03 17:17:34,150 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:17:34,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-12-03 17:17:34,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-12-03 17:17:34,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18574, Invalid=47218, Unknown=0, NotChecked=0, Total=65792 [2018-12-03 17:17:34,153 INFO L87 Difference]: Start difference. First operand 214 states and 256 transitions. Second operand 172 states. [2018-12-03 17:17:35,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:17:35,532 INFO L93 Difference]: Finished difference Result 225 states and 269 transitions. [2018-12-03 17:17:35,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-12-03 17:17:35,532 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 213 [2018-12-03 17:17:35,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:17:35,534 INFO L225 Difference]: With dead ends: 225 [2018-12-03 17:17:35,534 INFO L226 Difference]: Without dead ends: 223 [2018-12-03 17:17:35,535 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38199 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=18574, Invalid=47218, Unknown=0, NotChecked=0, Total=65792 [2018-12-03 17:17:35,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-12-03 17:17:35,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2018-12-03 17:17:35,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-12-03 17:17:35,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 262 transitions. [2018-12-03 17:17:35,541 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 262 transitions. Word has length 213 [2018-12-03 17:17:35,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:17:35,542 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 262 transitions. [2018-12-03 17:17:35,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-12-03 17:17:35,542 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 262 transitions. [2018-12-03 17:17:35,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-12-03 17:17:35,543 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:17:35,543 INFO L402 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1] [2018-12-03 17:17:35,543 INFO L423 AbstractCegarLoop]: === Iteration 45 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:17:35,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:17:35,544 INFO L82 PathProgramCache]: Analyzing trace with hash 372754796, now seen corresponding path program 43 times [2018-12-03 17:17:35,544 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:17:35,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:17:35,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:17:35,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:17:35,545 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:17:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:17:38,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:38,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:17:38,359 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:17:38,359 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:17:38,359 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:17:38,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:17:38,360 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:17:38,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:17:38,368 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:17:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:17:38,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:17:43,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:43,250 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:17:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:50,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:17:50,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88, 88] total 262 [2018-12-03 17:17:50,082 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:17:50,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-12-03 17:17:50,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-12-03 17:17:50,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19446, Invalid=49460, Unknown=0, NotChecked=0, Total=68906 [2018-12-03 17:17:50,085 INFO L87 Difference]: Start difference. First operand 219 states and 262 transitions. Second operand 176 states. [2018-12-03 17:17:51,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:17:51,601 INFO L93 Difference]: Finished difference Result 230 states and 275 transitions. [2018-12-03 17:17:51,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-12-03 17:17:51,602 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 218 [2018-12-03 17:17:51,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:17:51,603 INFO L225 Difference]: With dead ends: 230 [2018-12-03 17:17:51,603 INFO L226 Difference]: Without dead ends: 228 [2018-12-03 17:17:51,605 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40033 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=19446, Invalid=49460, Unknown=0, NotChecked=0, Total=68906 [2018-12-03 17:17:51,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-12-03 17:17:51,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2018-12-03 17:17:51,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-12-03 17:17:51,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 268 transitions. [2018-12-03 17:17:51,610 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 268 transitions. Word has length 218 [2018-12-03 17:17:51,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:17:51,610 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 268 transitions. [2018-12-03 17:17:51,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-12-03 17:17:51,610 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 268 transitions. [2018-12-03 17:17:51,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-12-03 17:17:51,611 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:17:51,611 INFO L402 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1] [2018-12-03 17:17:51,611 INFO L423 AbstractCegarLoop]: === Iteration 46 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:17:51,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:17:51,612 INFO L82 PathProgramCache]: Analyzing trace with hash -2065417248, now seen corresponding path program 44 times [2018-12-03 17:17:51,612 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:17:51,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:17:51,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:17:51,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:17:51,613 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:17:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:17:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:54,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:17:54,674 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:17:54,674 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:17:54,674 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:17:54,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:17:54,674 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:17:54,682 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:17:54,682 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:17:54,758 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-12-03 17:17:54,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:17:54,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:17:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:17:59,799 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:18:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:06,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:18:06,864 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90, 90] total 268 [2018-12-03 17:18:06,864 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:18:06,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-12-03 17:18:06,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-12-03 17:18:06,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20338, Invalid=51754, Unknown=0, NotChecked=0, Total=72092 [2018-12-03 17:18:06,868 INFO L87 Difference]: Start difference. First operand 224 states and 268 transitions. Second operand 180 states. [2018-12-03 17:18:08,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:18:08,584 INFO L93 Difference]: Finished difference Result 235 states and 281 transitions. [2018-12-03 17:18:08,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-12-03 17:18:08,585 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 223 [2018-12-03 17:18:08,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:18:08,586 INFO L225 Difference]: With dead ends: 235 [2018-12-03 17:18:08,586 INFO L226 Difference]: Without dead ends: 233 [2018-12-03 17:18:08,589 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 17:18:08,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-12-03 17:18:08,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2018-12-03 17:18:08,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-12-03 17:18:08,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 274 transitions. [2018-12-03 17:18:08,596 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 274 transitions. Word has length 223 [2018-12-03 17:18:08,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:18:08,596 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 274 transitions. [2018-12-03 17:18:08,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-12-03 17:18:08,596 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 274 transitions. [2018-12-03 17:18:08,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-12-03 17:18:08,597 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:18:08,598 INFO L402 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1] [2018-12-03 17:18:08,598 INFO L423 AbstractCegarLoop]: === Iteration 47 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:18:08,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:18:08,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1340001812, now seen corresponding path program 45 times [2018-12-03 17:18:08,598 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:18:08,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:18:08,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:18:08,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:18:08,599 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:18:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:18:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:11,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:18:11,521 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:18:11,521 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:18:11,521 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:18:11,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:18:11,521 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:18:11,532 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:18:11,533 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:18:11,586 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:18:11,586 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:18:11,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:18:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:16,781 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:18:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:24,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:18:24,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92, 92] total 274 [2018-12-03 17:18:24,290 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:18:24,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 184 states [2018-12-03 17:18:24,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2018-12-03 17:18:24,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21250, Invalid=54100, Unknown=0, NotChecked=0, Total=75350 [2018-12-03 17:18:24,294 INFO L87 Difference]: Start difference. First operand 229 states and 274 transitions. Second operand 184 states. [2018-12-03 17:18:25,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:18:25,992 INFO L93 Difference]: Finished difference Result 240 states and 287 transitions. [2018-12-03 17:18:25,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-12-03 17:18:25,993 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 228 [2018-12-03 17:18:25,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:18:25,994 INFO L225 Difference]: With dead ends: 240 [2018-12-03 17:18:25,994 INFO L226 Difference]: Without dead ends: 238 [2018-12-03 17:18:25,996 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43830 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=21250, Invalid=54100, Unknown=0, NotChecked=0, Total=75350 [2018-12-03 17:18:25,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-12-03 17:18:26,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2018-12-03 17:18:26,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-12-03 17:18:26,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 280 transitions. [2018-12-03 17:18:26,004 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 280 transitions. Word has length 228 [2018-12-03 17:18:26,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:18:26,005 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 280 transitions. [2018-12-03 17:18:26,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 184 states. [2018-12-03 17:18:26,005 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 280 transitions. [2018-12-03 17:18:26,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-12-03 17:18:26,006 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:18:26,006 INFO L402 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1] [2018-12-03 17:18:26,006 INFO L423 AbstractCegarLoop]: === Iteration 48 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:18:26,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:18:26,007 INFO L82 PathProgramCache]: Analyzing trace with hash 117973856, now seen corresponding path program 46 times [2018-12-03 17:18:26,007 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:18:26,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:18:26,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:18:26,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:18:26,008 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:18:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:18:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:29,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:18:29,291 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:18:29,292 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:18:29,292 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:18:29,292 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:18:29,292 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:18:29,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:18:29,300 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:18:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:18:29,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:18:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:35,167 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:18:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:42,819 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:18:42,819 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94, 94] total 280 [2018-12-03 17:18:42,819 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:18:42,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 188 states [2018-12-03 17:18:42,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2018-12-03 17:18:42,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22182, Invalid=56498, Unknown=0, NotChecked=0, Total=78680 [2018-12-03 17:18:42,824 INFO L87 Difference]: Start difference. First operand 234 states and 280 transitions. Second operand 188 states. [2018-12-03 17:18:44,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:18:44,653 INFO L93 Difference]: Finished difference Result 245 states and 293 transitions. [2018-12-03 17:18:44,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-12-03 17:18:44,653 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 233 [2018-12-03 17:18:44,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:18:44,655 INFO L225 Difference]: With dead ends: 245 [2018-12-03 17:18:44,655 INFO L226 Difference]: Without dead ends: 243 [2018-12-03 17:18:44,658 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45793 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=22182, Invalid=56498, Unknown=0, NotChecked=0, Total=78680 [2018-12-03 17:18:44,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-12-03 17:18:44,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2018-12-03 17:18:44,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-12-03 17:18:44,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 286 transitions. [2018-12-03 17:18:44,665 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 286 transitions. Word has length 233 [2018-12-03 17:18:44,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:18:44,666 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 286 transitions. [2018-12-03 17:18:44,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 188 states. [2018-12-03 17:18:44,666 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 286 transitions. [2018-12-03 17:18:44,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-12-03 17:18:44,667 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:18:44,667 INFO L402 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1] [2018-12-03 17:18:44,667 INFO L423 AbstractCegarLoop]: === Iteration 49 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:18:44,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:18:44,668 INFO L82 PathProgramCache]: Analyzing trace with hash 365034092, now seen corresponding path program 47 times [2018-12-03 17:18:44,668 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:18:44,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:18:44,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:18:44,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:18:44,669 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:18:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:18:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:47,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:18:47,812 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:18:47,812 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:18:47,812 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:18:47,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:18:47,812 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:18:47,821 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:18:47,822 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:18:47,917 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-12-03 17:18:47,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:18:47,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:18:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:18:53,511 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:19:01,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:19:01,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:19:01,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 286 [2018-12-03 17:19:01,707 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:19:01,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2018-12-03 17:19:01,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2018-12-03 17:19:01,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23134, Invalid=58948, Unknown=0, NotChecked=0, Total=82082 [2018-12-03 17:19:01,711 INFO L87 Difference]: Start difference. First operand 239 states and 286 transitions. Second operand 192 states. [2018-12-03 17:19:03,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:19:03,644 INFO L93 Difference]: Finished difference Result 250 states and 299 transitions. [2018-12-03 17:19:03,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-12-03 17:19:03,644 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 238 [2018-12-03 17:19:03,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:19:03,645 INFO L225 Difference]: With dead ends: 250 [2018-12-03 17:19:03,645 INFO L226 Difference]: Without dead ends: 248 [2018-12-03 17:19:03,648 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47799 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=23134, Invalid=58948, Unknown=0, NotChecked=0, Total=82082 [2018-12-03 17:19:03,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-12-03 17:19:03,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2018-12-03 17:19:03,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-12-03 17:19:03,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 292 transitions. [2018-12-03 17:19:03,653 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 292 transitions. Word has length 238 [2018-12-03 17:19:03,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:19:03,654 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 292 transitions. [2018-12-03 17:19:03,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 192 states. [2018-12-03 17:19:03,654 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 292 transitions. [2018-12-03 17:19:03,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-12-03 17:19:03,655 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:19:03,655 INFO L402 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1] [2018-12-03 17:19:03,655 INFO L423 AbstractCegarLoop]: === Iteration 50 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:19:03,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:19:03,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1225829088, now seen corresponding path program 48 times [2018-12-03 17:19:03,655 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:19:03,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:19:03,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:19:03,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:19:03,656 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:19:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:19:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:19:07,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:19:07,105 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:19:07,106 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:19:07,106 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:19:07,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:19:07,106 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:19:07,116 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:19:07,116 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:19:07,171 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:19:07,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:19:07,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:19:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:19:13,068 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:19:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:19:21,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:19:21,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 292 [2018-12-03 17:19:21,645 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:19:21,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 196 states [2018-12-03 17:19:21,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2018-12-03 17:19:21,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24106, Invalid=61450, Unknown=0, NotChecked=0, Total=85556 [2018-12-03 17:19:21,649 INFO L87 Difference]: Start difference. First operand 244 states and 292 transitions. Second operand 196 states. [2018-12-03 17:19:23,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:19:23,522 INFO L93 Difference]: Finished difference Result 255 states and 305 transitions. [2018-12-03 17:19:23,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-12-03 17:19:23,523 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 243 [2018-12-03 17:19:23,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:19:23,524 INFO L225 Difference]: With dead ends: 255 [2018-12-03 17:19:23,524 INFO L226 Difference]: Without dead ends: 253 [2018-12-03 17:19:23,525 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49848 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=24106, Invalid=61450, Unknown=0, NotChecked=0, Total=85556 [2018-12-03 17:19:23,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-12-03 17:19:23,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2018-12-03 17:19:23,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-12-03 17:19:23,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 298 transitions. [2018-12-03 17:19:23,533 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 298 transitions. Word has length 243 [2018-12-03 17:19:23,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:19:23,533 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 298 transitions. [2018-12-03 17:19:23,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 196 states. [2018-12-03 17:19:23,534 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 298 transitions. [2018-12-03 17:19:23,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-12-03 17:19:23,535 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:19:23,535 INFO L402 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1] [2018-12-03 17:19:23,535 INFO L423 AbstractCegarLoop]: === Iteration 51 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:19:23,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:19:23,536 INFO L82 PathProgramCache]: Analyzing trace with hash 291644140, now seen corresponding path program 49 times [2018-12-03 17:19:23,536 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:19:23,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:19:23,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:19:23,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:19:23,537 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:19:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:19:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:19:27,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:19:27,242 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:19:27,243 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:19:27,243 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:19:27,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:19:27,243 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:19:27,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:19:27,252 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:19:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:19:27,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:19:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:19:33,341 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:19:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:19:42,299 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:19:42,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100, 100] total 298 [2018-12-03 17:19:42,299 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:19:42,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 200 states [2018-12-03 17:19:42,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2018-12-03 17:19:42,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25098, Invalid=64004, Unknown=0, NotChecked=0, Total=89102 [2018-12-03 17:19:42,303 INFO L87 Difference]: Start difference. First operand 249 states and 298 transitions. Second operand 200 states. [2018-12-03 17:19:44,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:19:44,373 INFO L93 Difference]: Finished difference Result 260 states and 311 transitions. [2018-12-03 17:19:44,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-12-03 17:19:44,374 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 248 [2018-12-03 17:19:44,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:19:44,375 INFO L225 Difference]: With dead ends: 260 [2018-12-03 17:19:44,375 INFO L226 Difference]: Without dead ends: 258 [2018-12-03 17:19:44,377 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51940 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=25098, Invalid=64004, Unknown=0, NotChecked=0, Total=89102 [2018-12-03 17:19:44,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-12-03 17:19:44,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 254. [2018-12-03 17:19:44,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-12-03 17:19:44,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 304 transitions. [2018-12-03 17:19:44,385 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 304 transitions. Word has length 248 [2018-12-03 17:19:44,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:19:44,386 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 304 transitions. [2018-12-03 17:19:44,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 200 states. [2018-12-03 17:19:44,386 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 304 transitions. [2018-12-03 17:19:44,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-12-03 17:19:44,387 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:19:44,387 INFO L402 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1] [2018-12-03 17:19:44,388 INFO L423 AbstractCegarLoop]: === Iteration 52 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:19:44,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:19:44,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1380593056, now seen corresponding path program 50 times [2018-12-03 17:19:44,388 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:19:44,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:19:44,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:19:44,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:19:44,389 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:19:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:19:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 0 proven. 6175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:19:48,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:19:48,134 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:19:48,135 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:19:48,135 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:19:48,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:19:48,135 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:19:48,145 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:19:48,145 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:19:48,232 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-12-03 17:19:48,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:19:48,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:19:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 0 proven. 6175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:19:54,576 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:20:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 0 proven. 6175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:20:03,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:20:03,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 304 [2018-12-03 17:20:03,665 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:20:03,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 204 states [2018-12-03 17:20:03,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2018-12-03 17:20:03,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26109, Invalid=66611, Unknown=0, NotChecked=0, Total=92720 [2018-12-03 17:20:03,670 INFO L87 Difference]: Start difference. First operand 254 states and 304 transitions. Second operand 204 states. [2018-12-03 17:20:05,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:20:05,923 INFO L93 Difference]: Finished difference Result 265 states and 317 transitions. [2018-12-03 17:20:05,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-12-03 17:20:05,923 INFO L78 Accepts]: Start accepts. Automaton has 204 states. Word has length 253 [2018-12-03 17:20:05,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:20:05,925 INFO L225 Difference]: With dead ends: 265 [2018-12-03 17:20:05,925 INFO L226 Difference]: Without dead ends: 263 [2018-12-03 17:20:05,926 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54173 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=26109, Invalid=66611, Unknown=0, NotChecked=0, Total=92720 [2018-12-03 17:20:05,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-12-03 17:20:05,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 259. [2018-12-03 17:20:05,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-12-03 17:20:05,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 310 transitions. [2018-12-03 17:20:05,934 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 310 transitions. Word has length 253 [2018-12-03 17:20:05,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:20:05,934 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 310 transitions. [2018-12-03 17:20:05,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 204 states. [2018-12-03 17:20:05,934 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 310 transitions. [2018-12-03 17:20:05,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-12-03 17:20:05,936 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:20:05,936 INFO L402 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1] [2018-12-03 17:20:05,936 INFO L423 AbstractCegarLoop]: === Iteration 53 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:20:05,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:20:05,936 INFO L82 PathProgramCache]: Analyzing trace with hash 860466028, now seen corresponding path program 51 times [2018-12-03 17:20:05,936 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:20:05,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:20:05,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:20:05,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:20:05,937 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:20:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:20:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 0 proven. 6426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:20:09,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:20:09,746 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:20:09,746 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:20:09,746 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:20:09,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:20:09,746 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:20:09,757 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:20:09,758 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:20:09,817 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:20:09,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:20:09,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:20:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 0 proven. 6426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:20:16,678 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:20:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 0 proven. 6426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:20:25,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:20:25,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104, 104] total 310 [2018-12-03 17:20:25,789 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:20:25,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 208 states [2018-12-03 17:20:25,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 208 interpolants. [2018-12-03 17:20:25,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27130, Invalid=69280, Unknown=0, NotChecked=0, Total=96410 [2018-12-03 17:20:25,794 INFO L87 Difference]: Start difference. First operand 259 states and 310 transitions. Second operand 208 states. [2018-12-03 17:20:28,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:20:28,062 INFO L93 Difference]: Finished difference Result 270 states and 323 transitions. [2018-12-03 17:20:28,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-12-03 17:20:28,063 INFO L78 Accepts]: Start accepts. Automaton has 208 states. Word has length 258 [2018-12-03 17:20:28,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:20:28,064 INFO L225 Difference]: With dead ends: 270 [2018-12-03 17:20:28,064 INFO L226 Difference]: Without dead ends: 268 [2018-12-03 17:20:28,067 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56746 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=27130, Invalid=69280, Unknown=0, NotChecked=0, Total=96410 [2018-12-03 17:20:28,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-12-03 17:20:28,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2018-12-03 17:20:28,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-12-03 17:20:28,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 316 transitions. [2018-12-03 17:20:28,072 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 316 transitions. Word has length 258 [2018-12-03 17:20:28,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:20:28,073 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 316 transitions. [2018-12-03 17:20:28,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 208 states. [2018-12-03 17:20:28,073 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 316 transitions. [2018-12-03 17:20:28,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-12-03 17:20:28,074 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:20:28,074 INFO L402 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1] [2018-12-03 17:20:28,075 INFO L423 AbstractCegarLoop]: === Iteration 54 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:20:28,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:20:28,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1850762784, now seen corresponding path program 52 times [2018-12-03 17:20:28,075 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:20:28,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:20:28,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:20:28,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:20:28,076 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:20:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:20:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 0 proven. 6682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:20:32,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:20:32,079 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:20:32,079 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:20:32,079 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:20:32,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:20:32,079 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:20:32,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:20:32,088 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:20:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:20:32,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:20:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 0 proven. 6682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:20:38,876 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:20:48,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 0 proven. 6682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:20:48,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:20:48,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 316 [2018-12-03 17:20:48,383 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:20:48,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 212 states [2018-12-03 17:20:48,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2018-12-03 17:20:48,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28159, Invalid=72013, Unknown=0, NotChecked=0, Total=100172 [2018-12-03 17:20:48,387 INFO L87 Difference]: Start difference. First operand 264 states and 316 transitions. Second operand 212 states. [2018-12-03 17:20:50,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:20:50,804 INFO L93 Difference]: Finished difference Result 275 states and 329 transitions. [2018-12-03 17:20:50,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-12-03 17:20:50,805 INFO L78 Accepts]: Start accepts. Automaton has 212 states. Word has length 263 [2018-12-03 17:20:50,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:20:50,806 INFO L225 Difference]: With dead ends: 275 [2018-12-03 17:20:50,806 INFO L226 Difference]: Without dead ends: 273 [2018-12-03 17:20:50,808 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59374 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=28159, Invalid=72013, Unknown=0, NotChecked=0, Total=100172 [2018-12-03 17:20:50,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-12-03 17:20:50,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 269. [2018-12-03 17:20:50,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-12-03 17:20:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 322 transitions. [2018-12-03 17:20:50,816 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 322 transitions. Word has length 263 [2018-12-03 17:20:50,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:20:50,816 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 322 transitions. [2018-12-03 17:20:50,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 212 states. [2018-12-03 17:20:50,816 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 322 transitions. [2018-12-03 17:20:50,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-12-03 17:20:50,817 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:20:50,817 INFO L402 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1] [2018-12-03 17:20:50,818 INFO L423 AbstractCegarLoop]: === Iteration 55 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:20:50,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:20:50,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1371575276, now seen corresponding path program 53 times [2018-12-03 17:20:50,818 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:20:50,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:20:50,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:20:50,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:20:50,819 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:20:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:20:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 0 proven. 6943 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:20:55,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:20:55,026 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:20:55,026 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:20:55,026 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:20:55,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:20:55,027 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:20:55,036 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:20:55,036 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:20:55,142 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-12-03 17:20:55,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:20:55,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:21:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 0 proven. 6943 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:21:02,026 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:21:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 0 proven. 6943 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:21:11,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:21:11,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108, 108] total 322 [2018-12-03 17:21:11,633 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:21:11,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 216 states [2018-12-03 17:21:11,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2018-12-03 17:21:11,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29196, Invalid=74810, Unknown=0, NotChecked=0, Total=104006 [2018-12-03 17:21:11,639 INFO L87 Difference]: Start difference. First operand 269 states and 322 transitions. Second operand 216 states. [2018-12-03 17:21:14,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:21:14,235 INFO L93 Difference]: Finished difference Result 280 states and 335 transitions. [2018-12-03 17:21:14,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-12-03 17:21:14,235 INFO L78 Accepts]: Start accepts. Automaton has 216 states. Word has length 268 [2018-12-03 17:21:14,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:21:14,236 INFO L225 Difference]: With dead ends: 280 [2018-12-03 17:21:14,236 INFO L226 Difference]: Without dead ends: 278 [2018-12-03 17:21:14,239 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 17:21:14,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-12-03 17:21:14,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 274. [2018-12-03 17:21:14,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-12-03 17:21:14,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 328 transitions. [2018-12-03 17:21:14,245 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 328 transitions. Word has length 268 [2018-12-03 17:21:14,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:21:14,245 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 328 transitions. [2018-12-03 17:21:14,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 216 states. [2018-12-03 17:21:14,246 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 328 transitions. [2018-12-03 17:21:14,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-12-03 17:21:14,247 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:21:14,247 INFO L402 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1] [2018-12-03 17:21:14,247 INFO L423 AbstractCegarLoop]: === Iteration 56 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:21:14,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:21:14,248 INFO L82 PathProgramCache]: Analyzing trace with hash -877264544, now seen corresponding path program 54 times [2018-12-03 17:21:14,248 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:21:14,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:21:14,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:21:14,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:21:14,249 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:21:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:21:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 0 proven. 7209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:21:18,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:21:18,594 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:21:18,594 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:21:18,594 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:21:18,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:21:18,594 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:21:18,604 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:21:18,604 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:21:18,663 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:21:18,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:21:18,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:21:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 0 proven. 7209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:21:25,921 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:21:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 0 proven. 7209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:21:35,830 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:21:35,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110, 110] total 328 [2018-12-03 17:21:35,830 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:21:35,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 220 states [2018-12-03 17:21:35,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 220 interpolants. [2018-12-03 17:21:35,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30241, Invalid=77671, Unknown=0, NotChecked=0, Total=107912 [2018-12-03 17:21:35,834 INFO L87 Difference]: Start difference. First operand 274 states and 328 transitions. Second operand 220 states. [2018-12-03 17:21:38,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:21:38,417 INFO L93 Difference]: Finished difference Result 285 states and 341 transitions. [2018-12-03 17:21:38,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-12-03 17:21:38,417 INFO L78 Accepts]: Start accepts. Automaton has 220 states. Word has length 273 [2018-12-03 17:21:38,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:21:38,418 INFO L225 Difference]: With dead ends: 285 [2018-12-03 17:21:38,419 INFO L226 Difference]: Without dead ends: 283 [2018-12-03 17:21:38,420 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 17:21:38,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-12-03 17:21:38,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 279. [2018-12-03 17:21:38,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-12-03 17:21:38,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 334 transitions. [2018-12-03 17:21:38,429 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 334 transitions. Word has length 273 [2018-12-03 17:21:38,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:21:38,429 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 334 transitions. [2018-12-03 17:21:38,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 220 states. [2018-12-03 17:21:38,430 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 334 transitions. [2018-12-03 17:21:38,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-12-03 17:21:38,431 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:21:38,431 INFO L402 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1] [2018-12-03 17:21:38,431 INFO L423 AbstractCegarLoop]: === Iteration 57 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:21:38,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:21:38,432 INFO L82 PathProgramCache]: Analyzing trace with hash 151968876, now seen corresponding path program 55 times [2018-12-03 17:21:38,432 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:21:38,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:21:38,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:21:38,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:21:38,433 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:21:38,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:21:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7480 backedges. 0 proven. 7480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:21:42,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:21:42,650 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:21:42,650 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:21:42,650 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:21:42,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:21:42,650 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:21:42,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:21:42,659 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:21:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:21:42,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:21:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7480 backedges. 0 proven. 7480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:21:50,491 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:22:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7480 backedges. 0 proven. 7480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:22:00,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:22:00,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112, 112] total 334 [2018-12-03 17:22:00,702 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:22:00,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 224 states [2018-12-03 17:22:00,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2018-12-03 17:22:00,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31294, Invalid=80596, Unknown=0, NotChecked=0, Total=111890 [2018-12-03 17:22:00,707 INFO L87 Difference]: Start difference. First operand 279 states and 334 transitions. Second operand 224 states. [2018-12-03 17:22:03,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:22:03,690 INFO L93 Difference]: Finished difference Result 290 states and 347 transitions. [2018-12-03 17:22:03,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-12-03 17:22:03,691 INFO L78 Accepts]: Start accepts. Automaton has 224 states. Word has length 278 [2018-12-03 17:22:03,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:22:03,692 INFO L225 Difference]: With dead ends: 290 [2018-12-03 17:22:03,692 INFO L226 Difference]: Without dead ends: 288 [2018-12-03 17:22:03,694 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67588 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=31294, Invalid=80596, Unknown=0, NotChecked=0, Total=111890 [2018-12-03 17:22:03,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-12-03 17:22:03,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 284. [2018-12-03 17:22:03,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-12-03 17:22:03,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 340 transitions. [2018-12-03 17:22:03,700 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 340 transitions. Word has length 278 [2018-12-03 17:22:03,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:22:03,700 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 340 transitions. [2018-12-03 17:22:03,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 224 states. [2018-12-03 17:22:03,700 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 340 transitions. [2018-12-03 17:22:03,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-12-03 17:22:03,701 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:22:03,701 INFO L402 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1] [2018-12-03 17:22:03,701 INFO L423 AbstractCegarLoop]: === Iteration 58 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:22:03,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:22:03,702 INFO L82 PathProgramCache]: Analyzing trace with hash 746653920, now seen corresponding path program 56 times [2018-12-03 17:22:03,702 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:22:03,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:22:03,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:22:03,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:22:03,703 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:22:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:22:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 0 proven. 7756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:22:08,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:22:08,083 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:22:08,083 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:22:08,083 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:22:08,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:22:08,083 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:22:08,092 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:22:08,092 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:22:08,243 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-12-03 17:22:08,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:22:08,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:22:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 0 proven. 7756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:22:16,218 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:22:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 0 proven. 7756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:22:26,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:22:26,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114, 114] total 340 [2018-12-03 17:22:26,426 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:22:26,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 228 states [2018-12-03 17:22:26,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2018-12-03 17:22:26,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32355, Invalid=83585, Unknown=0, NotChecked=0, Total=115940 [2018-12-03 17:22:26,432 INFO L87 Difference]: Start difference. First operand 284 states and 340 transitions. Second operand 228 states. [2018-12-03 17:22:29,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:22:29,480 INFO L93 Difference]: Finished difference Result 295 states and 353 transitions. [2018-12-03 17:22:29,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-12-03 17:22:29,481 INFO L78 Accepts]: Start accepts. Automaton has 228 states. Word has length 283 [2018-12-03 17:22:29,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:22:29,482 INFO L225 Difference]: With dead ends: 295 [2018-12-03 17:22:29,482 INFO L226 Difference]: Without dead ends: 293 [2018-12-03 17:22:29,485 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70436 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=32355, Invalid=83585, Unknown=0, NotChecked=0, Total=115940 [2018-12-03 17:22:29,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-12-03 17:22:29,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 289. [2018-12-03 17:22:29,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-12-03 17:22:29,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 346 transitions. [2018-12-03 17:22:29,491 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 346 transitions. Word has length 283 [2018-12-03 17:22:29,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:22:29,491 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 346 transitions. [2018-12-03 17:22:29,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 228 states. [2018-12-03 17:22:29,491 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 346 transitions. [2018-12-03 17:22:29,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-12-03 17:22:29,492 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:22:29,492 INFO L402 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1] [2018-12-03 17:22:29,492 INFO L423 AbstractCegarLoop]: === Iteration 59 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:22:29,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:22:29,493 INFO L82 PathProgramCache]: Analyzing trace with hash 998016236, now seen corresponding path program 57 times [2018-12-03 17:22:29,493 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:22:29,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:22:29,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:22:29,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:22:29,493 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:22:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:22:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8037 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:22:34,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:22:34,000 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:22:34,000 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:22:34,001 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:22:34,001 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:22:34,001 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:22:34,009 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:22:34,010 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:22:34,076 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:22:34,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:22:34,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:22:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8037 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:22:42,251 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:22:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8037 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:22:53,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:22:53,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116, 116] total 346 [2018-12-03 17:22:53,029 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:22:53,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 232 states [2018-12-03 17:22:53,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 232 interpolants. [2018-12-03 17:22:53,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33424, Invalid=86638, Unknown=0, NotChecked=0, Total=120062 [2018-12-03 17:22:53,034 INFO L87 Difference]: Start difference. First operand 289 states and 346 transitions. Second operand 232 states. [2018-12-03 17:22:56,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:22:56,064 INFO L93 Difference]: Finished difference Result 300 states and 359 transitions. [2018-12-03 17:22:56,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-12-03 17:22:56,065 INFO L78 Accepts]: Start accepts. Automaton has 232 states. Word has length 288 [2018-12-03 17:22:56,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:22:56,066 INFO L225 Difference]: With dead ends: 300 [2018-12-03 17:22:56,066 INFO L226 Difference]: Without dead ends: 298 [2018-12-03 17:22:56,068 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 345 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73339 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=33424, Invalid=86638, Unknown=0, NotChecked=0, Total=120062 [2018-12-03 17:22:56,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-12-03 17:22:56,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2018-12-03 17:22:56,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-12-03 17:22:56,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 352 transitions. [2018-12-03 17:22:56,076 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 352 transitions. Word has length 288 [2018-12-03 17:22:56,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:22:56,076 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 352 transitions. [2018-12-03 17:22:56,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 232 states. [2018-12-03 17:22:56,077 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 352 transitions. [2018-12-03 17:22:56,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-12-03 17:22:56,078 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:22:56,078 INFO L402 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1] [2018-12-03 17:22:56,078 INFO L423 AbstractCegarLoop]: === Iteration 60 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:22:56,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:22:56,079 INFO L82 PathProgramCache]: Analyzing trace with hash -20402080, now seen corresponding path program 58 times [2018-12-03 17:22:56,079 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:22:56,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:22:56,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:22:56,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:22:56,080 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:22:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:23:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8323 backedges. 0 proven. 8323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:23:00,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:23:00,884 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:23:00,884 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:23:00,885 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:23:00,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:23:00,885 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:23:00,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:23:00,894 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:23:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:23:00,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:23:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8323 backedges. 0 proven. 8323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:23:09,276 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:23:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8323 backedges. 0 proven. 8323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:23:19,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:23:19,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118, 118] total 352 [2018-12-03 17:23:19,909 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:23:19,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 236 states [2018-12-03 17:23:19,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 236 interpolants. [2018-12-03 17:23:19,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34501, Invalid=89755, Unknown=0, NotChecked=0, Total=124256 [2018-12-03 17:23:19,914 INFO L87 Difference]: Start difference. First operand 294 states and 352 transitions. Second operand 236 states. [2018-12-03 17:23:23,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:23:23,093 INFO L93 Difference]: Finished difference Result 305 states and 365 transitions. [2018-12-03 17:23:23,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-12-03 17:23:23,093 INFO L78 Accepts]: Start accepts. Automaton has 236 states. Word has length 293 [2018-12-03 17:23:23,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:23:23,094 INFO L225 Difference]: With dead ends: 305 [2018-12-03 17:23:23,095 INFO L226 Difference]: Without dead ends: 303 [2018-12-03 17:23:23,097 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 351 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76297 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=34501, Invalid=89755, Unknown=0, NotChecked=0, Total=124256 [2018-12-03 17:23:23,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-12-03 17:23:23,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 299. [2018-12-03 17:23:23,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-12-03 17:23:23,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 358 transitions. [2018-12-03 17:23:23,106 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 358 transitions. Word has length 293 [2018-12-03 17:23:23,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:23:23,106 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 358 transitions. [2018-12-03 17:23:23,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 236 states. [2018-12-03 17:23:23,106 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 358 transitions. [2018-12-03 17:23:23,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-12-03 17:23:23,108 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:23:23,108 INFO L402 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1] [2018-12-03 17:23:23,108 INFO L423 AbstractCegarLoop]: === Iteration 61 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:23:23,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:23:23,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1856926356, now seen corresponding path program 59 times [2018-12-03 17:23:23,108 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:23:23,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:23:23,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:23:23,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:23:23,109 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:23:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:23:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8614 backedges. 0 proven. 8614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:23:28,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:23:28,088 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:23:28,088 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:23:28,088 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:23:28,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:23:28,088 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:23:28,097 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:23:28,097 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:23:28,207 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-12-03 17:23:28,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:23:28,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:23:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8614 backedges. 0 proven. 8614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:23:36,990 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:23:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8614 backedges. 0 proven. 8614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:23:47,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:23:47,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120, 120] total 358 [2018-12-03 17:23:47,891 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:23:47,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 240 states [2018-12-03 17:23:47,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 240 interpolants. [2018-12-03 17:23:47,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35586, Invalid=92936, Unknown=0, NotChecked=0, Total=128522 [2018-12-03 17:23:47,897 INFO L87 Difference]: Start difference. First operand 299 states and 358 transitions. Second operand 240 states. [2018-12-03 17:23:51,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:23:51,398 INFO L93 Difference]: Finished difference Result 310 states and 371 transitions. [2018-12-03 17:23:51,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-12-03 17:23:51,398 INFO L78 Accepts]: Start accepts. Automaton has 240 states. Word has length 298 [2018-12-03 17:23:51,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:23:51,400 INFO L225 Difference]: With dead ends: 310 [2018-12-03 17:23:51,400 INFO L226 Difference]: Without dead ends: 308 [2018-12-03 17:23:51,403 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 357 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79310 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=35586, Invalid=92936, Unknown=0, NotChecked=0, Total=128522 [2018-12-03 17:23:51,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-12-03 17:23:51,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 304. [2018-12-03 17:23:51,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-12-03 17:23:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 364 transitions. [2018-12-03 17:23:51,409 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 364 transitions. Word has length 298 [2018-12-03 17:23:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:23:51,409 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 364 transitions. [2018-12-03 17:23:51,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 240 states. [2018-12-03 17:23:51,409 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 364 transitions. [2018-12-03 17:23:51,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-12-03 17:23:51,410 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:23:51,410 INFO L402 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 1, 1, 1] [2018-12-03 17:23:51,410 INFO L423 AbstractCegarLoop]: === Iteration 62 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:23:51,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:23:51,411 INFO L82 PathProgramCache]: Analyzing trace with hash -2025523232, now seen corresponding path program 60 times [2018-12-03 17:23:51,411 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:23:51,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:23:51,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:23:51,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:23:51,412 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:23:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:23:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8910 backedges. 0 proven. 8910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:23:56,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:23:56,430 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:23:56,431 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:23:56,431 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:23:56,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:23:56,431 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:23:56,440 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:23:56,440 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:23:56,507 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:23:56,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:23:56,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:24:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8910 backedges. 0 proven. 8910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:24:05,207 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:24:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8910 backedges. 0 proven. 8910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:24:16,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:24:16,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122, 122] total 364 [2018-12-03 17:24:16,404 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:24:16,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 244 states [2018-12-03 17:24:16,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 244 interpolants. [2018-12-03 17:24:16,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36679, Invalid=96181, Unknown=0, NotChecked=0, Total=132860 [2018-12-03 17:24:16,410 INFO L87 Difference]: Start difference. First operand 304 states and 364 transitions. Second operand 244 states. [2018-12-03 17:24:19,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:24:19,895 INFO L93 Difference]: Finished difference Result 315 states and 377 transitions. [2018-12-03 17:24:19,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-12-03 17:24:19,896 INFO L78 Accepts]: Start accepts. Automaton has 244 states. Word has length 303 [2018-12-03 17:24:19,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:24:19,897 INFO L225 Difference]: With dead ends: 315 [2018-12-03 17:24:19,897 INFO L226 Difference]: Without dead ends: 313 [2018-12-03 17:24:19,900 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 363 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82378 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=36679, Invalid=96181, Unknown=0, NotChecked=0, Total=132860 [2018-12-03 17:24:19,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-12-03 17:24:19,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 309. [2018-12-03 17:24:19,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-12-03 17:24:19,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 370 transitions. [2018-12-03 17:24:19,906 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 370 transitions. Word has length 303 [2018-12-03 17:24:19,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:24:19,906 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 370 transitions. [2018-12-03 17:24:19,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 244 states. [2018-12-03 17:24:19,906 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 370 transitions. [2018-12-03 17:24:19,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-12-03 17:24:19,907 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:24:19,907 INFO L402 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 1, 1, 1] [2018-12-03 17:24:19,907 INFO L423 AbstractCegarLoop]: === Iteration 63 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:24:19,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:24:19,908 INFO L82 PathProgramCache]: Analyzing trace with hash -120195604, now seen corresponding path program 61 times [2018-12-03 17:24:19,908 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:24:19,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:24:19,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:24:19,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:24:19,909 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:24:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:24:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9211 backedges. 0 proven. 9211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:24:25,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:24:25,190 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:24:25,191 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:24:25,191 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:24:25,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:24:25,191 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:24:25,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:24:25,202 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:24:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:24:25,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:24:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9211 backedges. 0 proven. 9211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:24:34,472 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:24:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9211 backedges. 0 proven. 9211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:24:45,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:24:45,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124, 124] total 370 [2018-12-03 17:24:45,812 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:24:45,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 248 states [2018-12-03 17:24:45,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 248 interpolants. [2018-12-03 17:24:45,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37780, Invalid=99490, Unknown=0, NotChecked=0, Total=137270 [2018-12-03 17:24:45,818 INFO L87 Difference]: Start difference. First operand 309 states and 370 transitions. Second operand 248 states. [2018-12-03 17:24:49,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:24:49,375 INFO L93 Difference]: Finished difference Result 320 states and 383 transitions. [2018-12-03 17:24:49,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-12-03 17:24:49,376 INFO L78 Accepts]: Start accepts. Automaton has 248 states. Word has length 308 [2018-12-03 17:24:49,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:24:49,377 INFO L225 Difference]: With dead ends: 320 [2018-12-03 17:24:49,377 INFO L226 Difference]: Without dead ends: 318 [2018-12-03 17:24:49,380 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 17:24:49,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-12-03 17:24:49,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 314. [2018-12-03 17:24:49,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-12-03 17:24:49,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 376 transitions. [2018-12-03 17:24:49,388 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 376 transitions. Word has length 308 [2018-12-03 17:24:49,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:24:49,388 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 376 transitions. [2018-12-03 17:24:49,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 248 states. [2018-12-03 17:24:49,389 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 376 transitions. [2018-12-03 17:24:49,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-12-03 17:24:49,390 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:24:49,390 INFO L402 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1] [2018-12-03 17:24:49,390 INFO L423 AbstractCegarLoop]: === Iteration 64 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:24:49,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:24:49,391 INFO L82 PathProgramCache]: Analyzing trace with hash -2068979872, now seen corresponding path program 62 times [2018-12-03 17:24:49,391 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:24:49,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:24:49,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:24:49,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:24:49,392 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:24:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:24:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:24:54,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:24:54,865 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:24:54,865 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:24:54,865 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:24:54,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:24:54,865 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:24:54,875 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:24:54,875 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:24:54,992 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-12-03 17:24:54,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:24:55,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:25:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:25:04,886 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:25:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:25:16,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:25:16,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126, 126] total 376 [2018-12-03 17:25:16,439 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:25:16,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 252 states [2018-12-03 17:25:16,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 252 interpolants. [2018-12-03 17:25:16,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38889, Invalid=102863, Unknown=0, NotChecked=0, Total=141752 [2018-12-03 17:25:16,444 INFO L87 Difference]: Start difference. First operand 314 states and 376 transitions. Second operand 252 states. [2018-12-03 17:25:20,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:25:20,080 INFO L93 Difference]: Finished difference Result 325 states and 389 transitions. [2018-12-03 17:25:20,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-12-03 17:25:20,080 INFO L78 Accepts]: Start accepts. Automaton has 252 states. Word has length 313 [2018-12-03 17:25:20,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:25:20,081 INFO L225 Difference]: With dead ends: 325 [2018-12-03 17:25:20,082 INFO L226 Difference]: Without dead ends: 323 [2018-12-03 17:25:20,084 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 750 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 375 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88679 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=38889, Invalid=102863, Unknown=0, NotChecked=0, Total=141752 [2018-12-03 17:25:20,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-12-03 17:25:20,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 319. [2018-12-03 17:25:20,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-03 17:25:20,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 382 transitions. [2018-12-03 17:25:20,091 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 382 transitions. Word has length 313 [2018-12-03 17:25:20,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:25:20,092 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 382 transitions. [2018-12-03 17:25:20,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 252 states. [2018-12-03 17:25:20,092 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 382 transitions. [2018-12-03 17:25:20,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-12-03 17:25:20,093 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:25:20,093 INFO L402 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1] [2018-12-03 17:25:20,094 INFO L423 AbstractCegarLoop]: === Iteration 65 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:25:20,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:25:20,094 INFO L82 PathProgramCache]: Analyzing trace with hash 642891372, now seen corresponding path program 63 times [2018-12-03 17:25:20,094 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:25:20,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:25:20,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:25:20,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:25:20,095 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:25:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:25:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:25:25,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:25:25,807 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:25:25,807 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:25:25,807 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:25:25,807 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:25:25,807 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:25:25,820 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:25:25,820 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:25:25,890 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:25:25,890 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:25:25,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:25:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:25:35,683 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:25:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:25:47,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 17:25:47,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128, 128] total 382 [2018-12-03 17:25:47,322 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:25:47,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 256 states [2018-12-03 17:25:47,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 256 interpolants. [2018-12-03 17:25:47,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40006, Invalid=106300, Unknown=0, NotChecked=0, Total=146306 [2018-12-03 17:25:47,329 INFO L87 Difference]: Start difference. First operand 319 states and 382 transitions. Second operand 256 states. [2018-12-03 17:25:51,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:25:51,447 INFO L93 Difference]: Finished difference Result 330 states and 395 transitions. [2018-12-03 17:25:51,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-12-03 17:25:51,447 INFO L78 Accepts]: Start accepts. Automaton has 256 states. Word has length 318 [2018-12-03 17:25:51,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:25:51,449 INFO L225 Difference]: With dead ends: 330 [2018-12-03 17:25:51,449 INFO L226 Difference]: Without dead ends: 328 [2018-12-03 17:25:51,452 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 17:25:51,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-12-03 17:25:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2018-12-03 17:25:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2018-12-03 17:25:51,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 388 transitions. [2018-12-03 17:25:51,459 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 388 transitions. Word has length 318 [2018-12-03 17:25:51,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:25:51,459 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 388 transitions. [2018-12-03 17:25:51,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 256 states. [2018-12-03 17:25:51,459 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 388 transitions. [2018-12-03 17:25:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2018-12-03 17:25:51,460 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:25:51,460 INFO L402 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 1, 1, 1] [2018-12-03 17:25:51,461 INFO L423 AbstractCegarLoop]: === Iteration 66 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:25:51,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:25:51,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1346672928, now seen corresponding path program 64 times [2018-12-03 17:25:51,461 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:25:51,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:25:51,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:25:51,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:25:51,462 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:25:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:25:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 0 proven. 10144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:25:57,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:25:57,376 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:25:57,376 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:25:57,376 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:25:57,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:25:57,376 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:25:57,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:25:57,387 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:25:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:25:57,465 INFO L273 TraceCheckSpWp]: Computing forward predicates...