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_exp_cong.epf -i ../../../trunk/examples/programs/real-life/GateController.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 16:11:08,362 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 16:11:08,364 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 16:11:08,382 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 16:11:08,383 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 16:11:08,385 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 16:11:08,386 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 16:11:08,388 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 16:11:08,391 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 16:11:08,391 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 16:11:08,394 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-12-03 16:11:08,441 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_compound_exp_cong.epf [2018-12-03 16:11:08,465 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 16:11:08,466 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 16:11:08,467 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 16:11:08,467 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 16:11:08,468 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 16:11:08,468 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 16:11:08,468 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 16:11:08,468 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 16:11:08,468 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 16:11:08,469 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 16:11:08,469 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 16:11:08,470 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 16:11:08,470 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 16:11:08,470 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 16:11:08,470 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 16:11:08,472 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 16:11:08,472 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 16:11:08,472 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 16:11:08,473 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 16:11:08,473 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 16:11:08,473 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 16:11:08,473 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 16:11:08,475 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 16:11:08,476 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 16:11:08,476 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 16:11:08,476 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 16:11:08,476 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 16:11:08,477 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 16:11:08,477 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 16:11:08,477 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 16:11:08,477 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 16:11:08,478 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 16:11:08,478 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 16:11:08,478 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 16:11:08,478 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 16:11:08,479 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 16:11:08,479 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 16:11:08,479 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 16:11:08,479 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 16:11:08,480 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 16:11:08,480 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 16:11:08,541 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 16:11:08,554 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 16:11:08,558 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 16:11:08,560 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 16:11:08,561 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 16:11:08,562 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/GateController.bpl [2018-12-03 16:11:08,562 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/GateController.bpl' [2018-12-03 16:11:08,600 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 16:11:08,601 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 16:11:08,602 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 16:11:08,602 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 16:11:08,603 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 16:11:08,621 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 04:11:08" (1/1) ... [2018-12-03 16:11:08,631 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 04:11:08" (1/1) ... [2018-12-03 16:11:08,637 WARN L165 Inliner]: Program contained no entry procedure! [2018-12-03 16:11:08,637 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-12-03 16:11:08,638 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-12-03 16:11:08,640 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 16:11:08,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 16:11:08,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 16:11:08,642 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 16:11:08,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:11:08" (1/1) ... [2018-12-03 16:11:08,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:11:08" (1/1) ... [2018-12-03 16:11:08,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:11:08" (1/1) ... [2018-12-03 16:11:08,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:11:08" (1/1) ... [2018-12-03 16:11:08,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:11:08" (1/1) ... [2018-12-03 16:11:08,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:11:08" (1/1) ... [2018-12-03 16:11:08,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:11:08" (1/1) ... [2018-12-03 16:11:08,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 16:11:08,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 16:11:08,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 16:11:08,667 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 16:11:08,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:11:08" (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 16:11:08,741 INFO L124 BoogieDeclarations]: Specification and implementation of procedure GateController given in one single declaration [2018-12-03 16:11:08,742 INFO L130 BoogieDeclarations]: Found specification of procedure GateController [2018-12-03 16:11:08,742 INFO L138 BoogieDeclarations]: Found implementation of procedure GateController [2018-12-03 16:11:09,051 INFO L272 CfgBuilder]: Using library mode [2018-12-03 16:11:09,051 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-03 16:11:09,052 INFO L202 PluginConnector]: Adding new model GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 04:11:09 BoogieIcfgContainer [2018-12-03 16:11:09,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 16:11:09,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 16:11:09,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 16:11:09,055 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 16:11:09,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:11:08" (1/2) ... [2018-12-03 16:11:09,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b023a1b and model type GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 04:11:09, skipping insertion in model container [2018-12-03 16:11:09,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 04:11:09" (2/2) ... [2018-12-03 16:11:09,059 INFO L112 eAbstractionObserver]: Analyzing ICFG GateController.bpl [2018-12-03 16:11:09,069 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 16:11:09,077 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 16:11:09,095 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 16:11:09,128 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 16:11:09,128 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 16:11:09,128 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 16:11:09,129 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 16:11:09,129 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 16:11:09,129 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 16:11:09,129 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 16:11:09,129 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 16:11:09,145 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-12-03 16:11:09,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-03 16:11:09,151 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:09,152 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-03 16:11:09,155 INFO L423 AbstractCegarLoop]: === Iteration 1 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:09,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:09,161 INFO L82 PathProgramCache]: Analyzing trace with hash 30432, now seen corresponding path program 1 times [2018-12-03 16:11:09,163 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:09,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:09,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:09,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:09,211 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:09,301 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 16:11:09,304 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 16:11:09,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 16:11:09,305 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 16:11:09,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 16:11:09,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 16:11:09,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 16:11:09,328 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-12-03 16:11:09,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:09,405 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2018-12-03 16:11:09,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 16:11:09,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-03 16:11:09,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:09,417 INFO L225 Difference]: With dead ends: 19 [2018-12-03 16:11:09,417 INFO L226 Difference]: Without dead ends: 13 [2018-12-03 16:11:09,421 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 16:11:09,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-03 16:11:09,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 9. [2018-12-03 16:11:09,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-03 16:11:09,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2018-12-03 16:11:09,458 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 3 [2018-12-03 16:11:09,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:09,458 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2018-12-03 16:11:09,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 16:11:09,459 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2018-12-03 16:11:09,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-03 16:11:09,459 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:09,459 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 16:11:09,460 INFO L423 AbstractCegarLoop]: === Iteration 2 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:09,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:09,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1953617644, now seen corresponding path program 1 times [2018-12-03 16:11:09,460 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:09,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:09,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:09,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:09,462 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:09,730 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 16:11:09,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:09,731 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:09,732 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 9 with the following transitions: [2018-12-03 16:11:09,734 INFO L205 CegarAbsIntRunner]: [0], [4], [7], [11], [16], [18], [20], [21] [2018-12-03 16:11:09,779 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 16:11:09,780 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 16:11:10,029 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 16:11:10,030 INFO L272 AbstractInterpreter]: Visited 8 different actions 21 times. Merged at 7 different actions 12 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-03 16:11:10,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:10,087 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 16:11:10,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:10,088 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 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 16:11:10,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:10,105 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:11:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:10,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:10,328 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 16:11:10,328 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:10,464 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 16:11:10,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:10,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2018-12-03 16:11:10,494 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:10,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 16:11:10,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 16:11:10,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-12-03 16:11:10,496 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 8 states. [2018-12-03 16:11:10,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:10,699 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2018-12-03 16:11:10,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 16:11:10,700 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-12-03 16:11:10,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:10,701 INFO L225 Difference]: With dead ends: 21 [2018-12-03 16:11:10,701 INFO L226 Difference]: Without dead ends: 19 [2018-12-03 16:11:10,703 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 16:11:10,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-03 16:11:10,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2018-12-03 16:11:10,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-03 16:11:10,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2018-12-03 16:11:10,708 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2018-12-03 16:11:10,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:10,709 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2018-12-03 16:11:10,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 16:11:10,709 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2018-12-03 16:11:10,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-03 16:11:10,710 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:10,710 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 16:11:10,711 INFO L423 AbstractCegarLoop]: === Iteration 3 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:10,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:10,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1953558062, now seen corresponding path program 1 times [2018-12-03 16:11:10,711 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:10,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:10,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:10,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:10,713 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:10,740 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 16:11:10,741 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 16:11:10,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 16:11:10,741 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 16:11:10,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 16:11:10,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 16:11:10,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 16:11:10,742 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand 3 states. [2018-12-03 16:11:10,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:10,770 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2018-12-03 16:11:10,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 16:11:10,771 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-12-03 16:11:10,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:10,772 INFO L225 Difference]: With dead ends: 21 [2018-12-03 16:11:10,772 INFO L226 Difference]: Without dead ends: 14 [2018-12-03 16:11:10,773 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 16:11:10,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-12-03 16:11:10,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-12-03 16:11:10,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-03 16:11:10,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-12-03 16:11:10,778 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2018-12-03 16:11:10,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:10,778 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-12-03 16:11:10,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 16:11:10,778 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-12-03 16:11:10,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-03 16:11:10,779 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:10,779 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1] [2018-12-03 16:11:10,780 INFO L423 AbstractCegarLoop]: === Iteration 4 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:10,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:10,780 INFO L82 PathProgramCache]: Analyzing trace with hash 72785504, now seen corresponding path program 2 times [2018-12-03 16:11:10,780 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:10,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:10,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:10,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:10,782 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:10,956 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 16:11:10,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:10,956 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:10,957 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:10,957 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:10,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:10,957 INFO 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 16:11:10,968 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:11:10,968 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:11:10,992 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-03 16:11:10,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:10,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:11,394 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 16:11:11,394 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:11,515 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 16:11:11,537 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:11,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2018-12-03 16:11:11,538 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:11,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-03 16:11:11,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-03 16:11:11,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2018-12-03 16:11:11,540 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 12 states. [2018-12-03 16:11:11,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:11,621 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2018-12-03 16:11:11,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-03 16:11:11,621 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2018-12-03 16:11:11,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:11,622 INFO L225 Difference]: With dead ends: 25 [2018-12-03 16:11:11,622 INFO L226 Difference]: Without dead ends: 23 [2018-12-03 16:11:11,623 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2018-12-03 16:11:11,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-03 16:11:11,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-12-03 16:11:11,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-03 16:11:11,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2018-12-03 16:11:11,629 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2018-12-03 16:11:11,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:11,629 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2018-12-03 16:11:11,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-03 16:11:11,630 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2018-12-03 16:11:11,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-03 16:11:11,630 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:11,630 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1] [2018-12-03 16:11:11,631 INFO L423 AbstractCegarLoop]: === Iteration 5 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:11,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:11,631 INFO L82 PathProgramCache]: Analyzing trace with hash 491282284, now seen corresponding path program 3 times [2018-12-03 16:11:11,631 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:11,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:11,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:11,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:11,633 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:11,818 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 16:11:11,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:11,819 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:11,819 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:11,819 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:11,820 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:11,820 INFO 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 16:11:11,833 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:11:11,834 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:11:11,884 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:11:11,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:11,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:12,397 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 16:11:12,397 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:12,575 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 16:11:12,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:12,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2018-12-03 16:11:12,596 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:12,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-03 16:11:12,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-03 16:11:12,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2018-12-03 16:11:12,598 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 16 states. [2018-12-03 16:11:12,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:12,730 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2018-12-03 16:11:12,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-03 16:11:12,733 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-12-03 16:11:12,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:12,734 INFO L225 Difference]: With dead ends: 30 [2018-12-03 16:11:12,734 INFO L226 Difference]: Without dead ends: 28 [2018-12-03 16:11:12,735 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 16:11:12,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-03 16:11:12,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2018-12-03 16:11:12,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-03 16:11:12,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-12-03 16:11:12,740 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 18 [2018-12-03 16:11:12,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:12,741 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-12-03 16:11:12,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-03 16:11:12,741 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-12-03 16:11:12,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-03 16:11:12,742 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:12,742 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1] [2018-12-03 16:11:12,742 INFO L423 AbstractCegarLoop]: === Iteration 6 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:12,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:12,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1589732832, now seen corresponding path program 4 times [2018-12-03 16:11:12,743 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:12,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:12,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:12,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:12,745 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:12,905 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 16:11:12,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:12,906 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:12,906 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:12,907 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:12,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:12,907 INFO 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 16:11:12,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:12,923 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:11:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:12,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:13,326 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 16:11:13,327 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:13,515 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 16:11:13,535 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:13,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2018-12-03 16:11:13,535 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:13,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-03 16:11:13,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-03 16:11:13,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2018-12-03 16:11:13,538 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 20 states. [2018-12-03 16:11:13,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:13,946 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-12-03 16:11:13,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-03 16:11:13,947 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2018-12-03 16:11:13,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:13,948 INFO L225 Difference]: With dead ends: 35 [2018-12-03 16:11:13,948 INFO L226 Difference]: Without dead ends: 33 [2018-12-03 16:11:13,949 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 16:11:13,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-03 16:11:13,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2018-12-03 16:11:13,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-03 16:11:13,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2018-12-03 16:11:13,955 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 23 [2018-12-03 16:11:13,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:13,955 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2018-12-03 16:11:13,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-03 16:11:13,955 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2018-12-03 16:11:13,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-03 16:11:13,956 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:13,956 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1] [2018-12-03 16:11:13,957 INFO L423 AbstractCegarLoop]: === Iteration 7 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:13,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:13,957 INFO L82 PathProgramCache]: Analyzing trace with hash 602818540, now seen corresponding path program 5 times [2018-12-03 16:11:13,957 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:13,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:13,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:13,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:13,959 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:14,254 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 16:11:14,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:14,254 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:14,254 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:14,254 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:14,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:14,255 INFO 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 16:11:14,264 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:11:14,264 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:11:14,278 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-03 16:11:14,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:14,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:14,963 WARN L180 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-12-03 16:11:15,000 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 16:11:15,000 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:15,261 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 16:11:15,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:15,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2018-12-03 16:11:15,283 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:15,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-03 16:11:15,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-03 16:11:15,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=820, Unknown=0, NotChecked=0, Total=1190 [2018-12-03 16:11:15,285 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 24 states. [2018-12-03 16:11:15,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:15,442 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2018-12-03 16:11:15,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-03 16:11:15,443 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2018-12-03 16:11:15,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:15,444 INFO L225 Difference]: With dead ends: 40 [2018-12-03 16:11:15,444 INFO L226 Difference]: Without dead ends: 38 [2018-12-03 16:11:15,445 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 16:11:15,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-03 16:11:15,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2018-12-03 16:11:15,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-03 16:11:15,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2018-12-03 16:11:15,451 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 28 [2018-12-03 16:11:15,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:15,452 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2018-12-03 16:11:15,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-03 16:11:15,452 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2018-12-03 16:11:15,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-03 16:11:15,453 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:15,453 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1] [2018-12-03 16:11:15,453 INFO L423 AbstractCegarLoop]: === Iteration 8 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:15,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:15,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1979239776, now seen corresponding path program 6 times [2018-12-03 16:11:15,454 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:15,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:15,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:15,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:15,455 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:15,723 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 16:11:15,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:15,723 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:15,724 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:15,724 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:15,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:15,724 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:11:15,739 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:11:15,739 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:11:15,762 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:11:15,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:15,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:16,214 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 16:11:16,214 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:16,584 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 16:11:16,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:16,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2018-12-03 16:11:16,605 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:16,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-12-03 16:11:16,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-12-03 16:11:16,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=1138, Unknown=0, NotChecked=0, Total=1640 [2018-12-03 16:11:16,609 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 28 states. [2018-12-03 16:11:16,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:16,734 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2018-12-03 16:11:16,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-03 16:11:16,737 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 33 [2018-12-03 16:11:16,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:16,738 INFO L225 Difference]: With dead ends: 45 [2018-12-03 16:11:16,738 INFO L226 Difference]: Without dead ends: 43 [2018-12-03 16:11:16,739 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 16:11:16,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-03 16:11:16,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-12-03 16:11:16,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-03 16:11:16,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2018-12-03 16:11:16,745 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 33 [2018-12-03 16:11:16,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:16,746 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2018-12-03 16:11:16,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-12-03 16:11:16,746 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2018-12-03 16:11:16,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-03 16:11:16,747 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:16,747 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1] [2018-12-03 16:11:16,747 INFO L423 AbstractCegarLoop]: === Iteration 9 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:16,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:16,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1800695700, now seen corresponding path program 7 times [2018-12-03 16:11:16,748 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:16,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:16,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:16,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:16,749 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:16,965 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 16:11:16,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:16,965 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:16,965 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:16,965 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:16,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:16,966 INFO 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 16:11:16,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:16,974 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:11:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:16,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:17,414 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 16:11:17,414 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:17,685 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 16:11:17,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:17,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2018-12-03 16:11:17,706 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:17,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-12-03 16:11:17,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-12-03 16:11:17,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=654, Invalid=1508, Unknown=0, NotChecked=0, Total=2162 [2018-12-03 16:11:17,710 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 32 states. [2018-12-03 16:11:17,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:17,992 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2018-12-03 16:11:17,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-03 16:11:17,993 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 38 [2018-12-03 16:11:17,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:17,994 INFO L225 Difference]: With dead ends: 50 [2018-12-03 16:11:17,994 INFO L226 Difference]: Without dead ends: 48 [2018-12-03 16:11:17,995 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=654, Invalid=1508, Unknown=0, NotChecked=0, Total=2162 [2018-12-03 16:11:17,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-03 16:11:18,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2018-12-03 16:11:18,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-03 16:11:18,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2018-12-03 16:11:18,003 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 38 [2018-12-03 16:11:18,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:18,004 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2018-12-03 16:11:18,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-12-03 16:11:18,004 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2018-12-03 16:11:18,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-03 16:11:18,005 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:18,005 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1] [2018-12-03 16:11:18,005 INFO L423 AbstractCegarLoop]: === Iteration 10 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:18,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:18,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1430989600, now seen corresponding path program 8 times [2018-12-03 16:11:18,006 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:18,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:18,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:18,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:18,007 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:18,259 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 16:11:18,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:18,260 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:18,260 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:18,260 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:18,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:18,261 INFO 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 16:11:18,271 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:11:18,272 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:11:18,297 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-03 16:11:18,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:18,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:18,806 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 16:11:18,807 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:19,815 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 16:11:19,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:19,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2018-12-03 16:11:19,835 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:19,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-03 16:11:19,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-03 16:11:19,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1930, Unknown=0, NotChecked=0, Total=2756 [2018-12-03 16:11:19,838 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 36 states. [2018-12-03 16:11:20,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:20,215 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2018-12-03 16:11:20,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-03 16:11:20,216 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2018-12-03 16:11:20,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:20,217 INFO L225 Difference]: With dead ends: 55 [2018-12-03 16:11:20,217 INFO L226 Difference]: Without dead ends: 53 [2018-12-03 16:11:20,218 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=826, Invalid=1930, Unknown=0, NotChecked=0, Total=2756 [2018-12-03 16:11:20,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-03 16:11:20,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2018-12-03 16:11:20,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-03 16:11:20,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2018-12-03 16:11:20,225 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 43 [2018-12-03 16:11:20,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:20,226 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2018-12-03 16:11:20,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-03 16:11:20,226 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2018-12-03 16:11:20,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-12-03 16:11:20,227 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:20,227 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1] [2018-12-03 16:11:20,228 INFO L423 AbstractCegarLoop]: === Iteration 11 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:20,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:20,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1043842836, now seen corresponding path program 9 times [2018-12-03 16:11:20,228 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:20,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:20,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:20,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:20,229 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:20,629 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 16:11:20,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:20,630 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:20,630 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:20,630 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:20,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:20,630 INFO 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 16:11:20,646 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:11:20,647 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:11:20,664 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:11:20,664 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:20,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:21,186 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 16:11:21,186 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:22,124 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 16:11:22,144 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:22,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2018-12-03 16:11:22,144 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:22,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-12-03 16:11:22,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-12-03 16:11:22,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1018, Invalid=2404, Unknown=0, NotChecked=0, Total=3422 [2018-12-03 16:11:22,147 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 40 states. [2018-12-03 16:11:22,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:22,293 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2018-12-03 16:11:22,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-03 16:11:22,294 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2018-12-03 16:11:22,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:22,295 INFO L225 Difference]: With dead ends: 60 [2018-12-03 16:11:22,296 INFO L226 Difference]: Without dead ends: 58 [2018-12-03 16:11:22,297 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1018, Invalid=2404, Unknown=0, NotChecked=0, Total=3422 [2018-12-03 16:11:22,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-03 16:11:22,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2018-12-03 16:11:22,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-12-03 16:11:22,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2018-12-03 16:11:22,303 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 48 [2018-12-03 16:11:22,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:22,303 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2018-12-03 16:11:22,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-12-03 16:11:22,303 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2018-12-03 16:11:22,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-03 16:11:22,304 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:22,304 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1] [2018-12-03 16:11:22,304 INFO L423 AbstractCegarLoop]: === Iteration 12 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:22,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:22,305 INFO L82 PathProgramCache]: Analyzing trace with hash -676496288, now seen corresponding path program 10 times [2018-12-03 16:11:22,305 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:22,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:22,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:22,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:22,306 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:23,056 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 16:11:23,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:23,057 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:23,057 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:23,057 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:23,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:23,057 INFO 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 16:11:23,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:23,070 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:11:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:23,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:23,811 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 16:11:23,811 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:24,473 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 16:11:24,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:24,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 64 [2018-12-03 16:11:24,492 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:24,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-12-03 16:11:24,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-12-03 16:11:24,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=2930, Unknown=0, NotChecked=0, Total=4160 [2018-12-03 16:11:24,496 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 44 states. [2018-12-03 16:11:24,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:24,727 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2018-12-03 16:11:24,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-03 16:11:24,728 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 53 [2018-12-03 16:11:24,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:24,729 INFO L225 Difference]: With dead ends: 65 [2018-12-03 16:11:24,729 INFO L226 Difference]: Without dead ends: 63 [2018-12-03 16:11:24,731 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2215 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1230, Invalid=2930, Unknown=0, NotChecked=0, Total=4160 [2018-12-03 16:11:24,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-03 16:11:24,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-12-03 16:11:24,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-03 16:11:24,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2018-12-03 16:11:24,737 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 53 [2018-12-03 16:11:24,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:24,737 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2018-12-03 16:11:24,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-12-03 16:11:24,737 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2018-12-03 16:11:24,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-12-03 16:11:24,738 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:24,738 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1] [2018-12-03 16:11:24,739 INFO L423 AbstractCegarLoop]: === Iteration 13 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:24,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:24,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1014218388, now seen corresponding path program 11 times [2018-12-03 16:11:24,739 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:24,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:24,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:24,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:24,740 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:25,034 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 16:11:25,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:25,035 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:25,035 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:25,035 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:25,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:25,036 INFO 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 16:11:25,052 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:11:25,053 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:11:25,076 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-12-03 16:11:25,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:25,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:25,805 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 16:11:25,805 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:26,489 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 16:11:26,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:26,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2018-12-03 16:11:26,509 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:26,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-12-03 16:11:26,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-12-03 16:11:26,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1462, Invalid=3508, Unknown=0, NotChecked=0, Total=4970 [2018-12-03 16:11:26,511 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 48 states. [2018-12-03 16:11:26,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:26,731 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2018-12-03 16:11:26,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-03 16:11:26,732 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 58 [2018-12-03 16:11:26,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:26,733 INFO L225 Difference]: With dead ends: 70 [2018-12-03 16:11:26,733 INFO L226 Difference]: Without dead ends: 68 [2018-12-03 16:11:26,735 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 16:11:26,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-03 16:11:26,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2018-12-03 16:11:26,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-03 16:11:26,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2018-12-03 16:11:26,742 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 58 [2018-12-03 16:11:26,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:26,743 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2018-12-03 16:11:26,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-12-03 16:11:26,743 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2018-12-03 16:11:26,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-03 16:11:26,744 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:26,744 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1] [2018-12-03 16:11:26,744 INFO L423 AbstractCegarLoop]: === Iteration 14 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:26,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:26,745 INFO L82 PathProgramCache]: Analyzing trace with hash -778386464, now seen corresponding path program 12 times [2018-12-03 16:11:26,745 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:26,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:26,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:26,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:26,746 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:27,159 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 16:11:27,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:27,159 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:27,160 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:27,160 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:27,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:27,160 INFO 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 16:11:27,169 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:11:27,169 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:11:27,185 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:11:27,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:27,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:27,951 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 16:11:27,951 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:28,584 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 16:11:28,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:28,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 76 [2018-12-03 16:11:28,603 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:28,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-12-03 16:11:28,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-12-03 16:11:28,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1714, Invalid=4138, Unknown=0, NotChecked=0, Total=5852 [2018-12-03 16:11:28,606 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 52 states. [2018-12-03 16:11:28,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:28,878 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2018-12-03 16:11:28,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-12-03 16:11:28,879 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 63 [2018-12-03 16:11:28,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:28,879 INFO L225 Difference]: With dead ends: 75 [2018-12-03 16:11:28,880 INFO L226 Difference]: Without dead ends: 73 [2018-12-03 16:11:28,881 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3174 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1714, Invalid=4138, Unknown=0, NotChecked=0, Total=5852 [2018-12-03 16:11:28,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-12-03 16:11:28,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2018-12-03 16:11:28,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-12-03 16:11:28,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2018-12-03 16:11:28,890 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 63 [2018-12-03 16:11:28,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:28,891 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2018-12-03 16:11:28,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-12-03 16:11:28,891 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2018-12-03 16:11:28,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-12-03 16:11:28,892 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:28,892 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1] [2018-12-03 16:11:28,893 INFO L423 AbstractCegarLoop]: === Iteration 15 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:28,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:28,893 INFO L82 PathProgramCache]: Analyzing trace with hash -130045460, now seen corresponding path program 13 times [2018-12-03 16:11:28,893 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:28,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:28,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:28,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:28,894 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:29,796 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 16:11:29,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:29,796 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:29,796 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:29,797 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:29,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:29,797 INFO 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 16:11:29,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:29,806 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:11:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:29,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:30,505 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 16:11:30,505 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:31,200 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 16:11:31,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:31,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 82 [2018-12-03 16:11:31,220 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:31,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-12-03 16:11:31,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-12-03 16:11:31,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1986, Invalid=4820, Unknown=0, NotChecked=0, Total=6806 [2018-12-03 16:11:31,223 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 56 states. [2018-12-03 16:11:31,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:31,462 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2018-12-03 16:11:31,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-03 16:11:31,462 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 68 [2018-12-03 16:11:31,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:31,464 INFO L225 Difference]: With dead ends: 80 [2018-12-03 16:11:31,464 INFO L226 Difference]: Without dead ends: 78 [2018-12-03 16:11:31,465 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3718 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1986, Invalid=4820, Unknown=0, NotChecked=0, Total=6806 [2018-12-03 16:11:31,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-12-03 16:11:31,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2018-12-03 16:11:31,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-12-03 16:11:31,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2018-12-03 16:11:31,470 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 68 [2018-12-03 16:11:31,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:31,471 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2018-12-03 16:11:31,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-12-03 16:11:31,471 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2018-12-03 16:11:31,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-03 16:11:31,472 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:31,472 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1] [2018-12-03 16:11:31,472 INFO L423 AbstractCegarLoop]: === Iteration 16 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:31,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:31,473 INFO L82 PathProgramCache]: Analyzing trace with hash -415978656, now seen corresponding path program 14 times [2018-12-03 16:11:31,473 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:31,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:31,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:31,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:31,474 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:32,004 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 16:11:32,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:32,005 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:32,005 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:32,005 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:32,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:32,005 INFO 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 16:11:32,020 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:11:32,020 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:11:32,056 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-12-03 16:11:32,056 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:32,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:32,878 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 16:11:32,879 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:33,942 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 16:11:33,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:33,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 88 [2018-12-03 16:11:33,962 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:33,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-12-03 16:11:33,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-12-03 16:11:33,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=5554, Unknown=0, NotChecked=0, Total=7832 [2018-12-03 16:11:33,963 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 60 states. [2018-12-03 16:11:34,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:34,201 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2018-12-03 16:11:34,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-03 16:11:34,203 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 73 [2018-12-03 16:11:34,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:34,203 INFO L225 Difference]: With dead ends: 85 [2018-12-03 16:11:34,204 INFO L226 Difference]: Without dead ends: 83 [2018-12-03 16:11:34,205 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4305 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2278, Invalid=5554, Unknown=0, NotChecked=0, Total=7832 [2018-12-03 16:11:34,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-12-03 16:11:34,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-12-03 16:11:34,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-12-03 16:11:34,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2018-12-03 16:11:34,211 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 73 [2018-12-03 16:11:34,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:34,214 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2018-12-03 16:11:34,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-12-03 16:11:34,214 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2018-12-03 16:11:34,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-12-03 16:11:34,215 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:34,215 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1] [2018-12-03 16:11:34,215 INFO L423 AbstractCegarLoop]: === Iteration 17 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:34,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:34,216 INFO L82 PathProgramCache]: Analyzing trace with hash -2077592980, now seen corresponding path program 15 times [2018-12-03 16:11:34,216 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:34,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:34,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:34,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:34,217 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:35,273 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 16:11:35,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:35,273 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:35,273 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:35,273 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:35,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:35,274 INFO 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 16:11:35,282 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:11:35,283 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:11:35,300 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:11:35,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:35,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:36,112 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 16:11:36,112 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:37,021 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 16:11:37,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:37,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 94 [2018-12-03 16:11:37,040 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:37,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-12-03 16:11:37,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-12-03 16:11:37,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2590, Invalid=6340, Unknown=0, NotChecked=0, Total=8930 [2018-12-03 16:11:37,043 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 64 states. [2018-12-03 16:11:37,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:37,462 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2018-12-03 16:11:37,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-03 16:11:37,473 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 78 [2018-12-03 16:11:37,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:37,474 INFO L225 Difference]: With dead ends: 90 [2018-12-03 16:11:37,474 INFO L226 Difference]: Without dead ends: 88 [2018-12-03 16:11:37,475 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4935 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2590, Invalid=6340, Unknown=0, NotChecked=0, Total=8930 [2018-12-03 16:11:37,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-12-03 16:11:37,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2018-12-03 16:11:37,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-12-03 16:11:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2018-12-03 16:11:37,481 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 78 [2018-12-03 16:11:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:37,486 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2018-12-03 16:11:37,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-12-03 16:11:37,486 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2018-12-03 16:11:37,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-12-03 16:11:37,487 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:37,487 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1] [2018-12-03 16:11:37,488 INFO L423 AbstractCegarLoop]: === Iteration 18 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:37,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:37,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1630745312, now seen corresponding path program 16 times [2018-12-03 16:11:37,488 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:37,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:37,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:37,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:37,489 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:38,092 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 16:11:38,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:38,093 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:38,093 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:38,093 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:38,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:38,093 INFO 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 16:11:38,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:38,102 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:11:38,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:38,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:39,112 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 16:11:39,113 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:40,421 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 16:11:40,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:40,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 100 [2018-12-03 16:11:40,440 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:40,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-12-03 16:11:40,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-12-03 16:11:40,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2922, Invalid=7178, Unknown=0, NotChecked=0, Total=10100 [2018-12-03 16:11:40,442 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 68 states. [2018-12-03 16:11:40,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:40,888 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2018-12-03 16:11:40,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-12-03 16:11:40,889 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 83 [2018-12-03 16:11:40,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:40,890 INFO L225 Difference]: With dead ends: 95 [2018-12-03 16:11:40,890 INFO L226 Difference]: Without dead ends: 93 [2018-12-03 16:11:40,890 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5608 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2922, Invalid=7178, Unknown=0, NotChecked=0, Total=10100 [2018-12-03 16:11:40,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-12-03 16:11:40,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2018-12-03 16:11:40,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-03 16:11:40,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2018-12-03 16:11:40,895 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 83 [2018-12-03 16:11:40,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:40,897 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2018-12-03 16:11:40,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-12-03 16:11:40,897 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2018-12-03 16:11:40,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-12-03 16:11:40,898 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:40,898 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1] [2018-12-03 16:11:40,898 INFO L423 AbstractCegarLoop]: === Iteration 19 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:40,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:40,899 INFO L82 PathProgramCache]: Analyzing trace with hash -778790164, now seen corresponding path program 17 times [2018-12-03 16:11:40,899 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:40,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:40,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:40,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:40,900 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:42,059 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 16:11:42,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:42,059 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:42,059 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:42,059 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:42,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:42,059 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:11:42,069 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:11:42,069 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:11:42,096 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-12-03 16:11:42,096 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:42,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:43,250 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 16:11:43,251 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:44,460 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 16:11:44,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:44,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 106 [2018-12-03 16:11:44,479 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:44,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-12-03 16:11:44,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-12-03 16:11:44,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3274, Invalid=8068, Unknown=0, NotChecked=0, Total=11342 [2018-12-03 16:11:44,481 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand 72 states. [2018-12-03 16:11:44,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:44,848 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2018-12-03 16:11:44,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-12-03 16:11:44,849 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 88 [2018-12-03 16:11:44,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:44,850 INFO L225 Difference]: With dead ends: 100 [2018-12-03 16:11:44,850 INFO L226 Difference]: Without dead ends: 98 [2018-12-03 16:11:44,852 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6324 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3274, Invalid=8068, Unknown=0, NotChecked=0, Total=11342 [2018-12-03 16:11:44,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-12-03 16:11:44,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2018-12-03 16:11:44,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-12-03 16:11:44,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2018-12-03 16:11:44,857 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 88 [2018-12-03 16:11:44,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:44,858 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2018-12-03 16:11:44,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-12-03 16:11:44,858 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2018-12-03 16:11:44,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-12-03 16:11:44,859 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:44,859 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1] [2018-12-03 16:11:44,859 INFO L423 AbstractCegarLoop]: === Iteration 20 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:44,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:44,860 INFO L82 PathProgramCache]: Analyzing trace with hash 38689376, now seen corresponding path program 18 times [2018-12-03 16:11:44,860 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:44,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:44,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:44,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:44,861 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:45,573 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 16:11:45,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:45,573 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:45,573 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:45,574 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:45,574 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:45,574 INFO 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 16:11:45,582 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:11:45,583 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:11:45,602 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:11:45,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:45,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:46,651 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 16:11:46,651 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:47,869 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 16:11:47,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:47,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 112 [2018-12-03 16:11:47,888 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:47,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-12-03 16:11:47,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-12-03 16:11:47,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3646, Invalid=9010, Unknown=0, NotChecked=0, Total=12656 [2018-12-03 16:11:47,890 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand 76 states. [2018-12-03 16:11:48,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:48,196 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2018-12-03 16:11:48,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-12-03 16:11:48,196 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 93 [2018-12-03 16:11:48,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:48,197 INFO L225 Difference]: With dead ends: 105 [2018-12-03 16:11:48,197 INFO L226 Difference]: Without dead ends: 103 [2018-12-03 16:11:48,198 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 16:11:48,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-12-03 16:11:48,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-12-03 16:11:48,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-12-03 16:11:48,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2018-12-03 16:11:48,202 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 93 [2018-12-03 16:11:48,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:48,202 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2018-12-03 16:11:48,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-12-03 16:11:48,202 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2018-12-03 16:11:48,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-12-03 16:11:48,203 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:48,203 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1] [2018-12-03 16:11:48,203 INFO L423 AbstractCegarLoop]: === Iteration 21 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:48,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:48,203 INFO L82 PathProgramCache]: Analyzing trace with hash 281420652, now seen corresponding path program 19 times [2018-12-03 16:11:48,203 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:48,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:48,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:48,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:48,204 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:48,988 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 16:11:48,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:48,989 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:48,989 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:48,989 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:48,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:48,989 INFO 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 16:11:48,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:48,998 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:11:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:49,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:50,621 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 16:11:50,621 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:51,964 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 16:11:51,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:51,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 118 [2018-12-03 16:11:51,983 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:51,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-12-03 16:11:51,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-12-03 16:11:51,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4038, Invalid=10004, Unknown=0, NotChecked=0, Total=14042 [2018-12-03 16:11:51,985 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand 80 states. [2018-12-03 16:11:52,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:52,303 INFO L93 Difference]: Finished difference Result 110 states and 131 transitions. [2018-12-03 16:11:52,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-12-03 16:11:52,303 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 98 [2018-12-03 16:11:52,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:52,304 INFO L225 Difference]: With dead ends: 110 [2018-12-03 16:11:52,304 INFO L226 Difference]: Without dead ends: 108 [2018-12-03 16:11:52,305 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7885 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4038, Invalid=10004, Unknown=0, NotChecked=0, Total=14042 [2018-12-03 16:11:52,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-12-03 16:11:52,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2018-12-03 16:11:52,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-12-03 16:11:52,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2018-12-03 16:11:52,310 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 98 [2018-12-03 16:11:52,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:52,310 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2018-12-03 16:11:52,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-12-03 16:11:52,310 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2018-12-03 16:11:52,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-12-03 16:11:52,311 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:52,311 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1] [2018-12-03 16:11:52,311 INFO L423 AbstractCegarLoop]: === Iteration 22 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:52,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:52,312 INFO L82 PathProgramCache]: Analyzing trace with hash -2025971232, now seen corresponding path program 20 times [2018-12-03 16:11:52,312 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:52,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:52,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:52,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:52,313 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:53,029 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 16:11:53,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:53,030 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:53,030 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:53,030 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:53,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:53,030 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:11:53,040 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:11:53,040 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:11:53,072 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-12-03 16:11:53,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:53,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:55,607 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 16:11:55,608 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:57,221 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 16:11:57,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:57,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 124 [2018-12-03 16:11:57,242 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:57,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-12-03 16:11:57,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-12-03 16:11:57,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4450, Invalid=11050, Unknown=0, NotChecked=0, Total=15500 [2018-12-03 16:11:57,244 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand 84 states. [2018-12-03 16:11:57,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:57,602 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2018-12-03 16:11:57,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-12-03 16:11:57,605 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 103 [2018-12-03 16:11:57,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:57,606 INFO L225 Difference]: With dead ends: 115 [2018-12-03 16:11:57,606 INFO L226 Difference]: Without dead ends: 113 [2018-12-03 16:11:57,607 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 16:11:57,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-12-03 16:11:57,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2018-12-03 16:11:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-12-03 16:11:57,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2018-12-03 16:11:57,611 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 103 [2018-12-03 16:11:57,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:57,612 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2018-12-03 16:11:57,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-12-03 16:11:57,612 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2018-12-03 16:11:57,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-12-03 16:11:57,613 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:57,613 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1] [2018-12-03 16:11:57,613 INFO L423 AbstractCegarLoop]: === Iteration 23 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:57,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:57,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1207497748, now seen corresponding path program 21 times [2018-12-03 16:11:57,613 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:57,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:57,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:57,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:57,614 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:58,466 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 16:11:58,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:58,467 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:58,467 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:58,467 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:58,467 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:58,467 INFO 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 16:11:58,477 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:11:58,478 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:11:58,501 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:11:58,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:58,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:59,823 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 16:11:59,823 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:12:01,682 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 16:12:01,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:12:01,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 130 [2018-12-03 16:12:01,701 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:12:01,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-12-03 16:12:01,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-12-03 16:12:01,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4882, Invalid=12148, Unknown=0, NotChecked=0, Total=17030 [2018-12-03 16:12:01,704 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand 88 states. [2018-12-03 16:12:02,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:12:02,119 INFO L93 Difference]: Finished difference Result 120 states and 143 transitions. [2018-12-03 16:12:02,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-12-03 16:12:02,120 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 108 [2018-12-03 16:12:02,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:12:02,120 INFO L225 Difference]: With dead ends: 120 [2018-12-03 16:12:02,121 INFO L226 Difference]: Without dead ends: 118 [2018-12-03 16:12:02,122 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9618 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4882, Invalid=12148, Unknown=0, NotChecked=0, Total=17030 [2018-12-03 16:12:02,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-12-03 16:12:02,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2018-12-03 16:12:02,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-12-03 16:12:02,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2018-12-03 16:12:02,127 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 108 [2018-12-03 16:12:02,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:12:02,127 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2018-12-03 16:12:02,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-12-03 16:12:02,128 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2018-12-03 16:12:02,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-12-03 16:12:02,128 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:12:02,128 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1] [2018-12-03 16:12:02,129 INFO L423 AbstractCegarLoop]: === Iteration 24 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:12:02,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:12:02,129 INFO L82 PathProgramCache]: Analyzing trace with hash 649759072, now seen corresponding path program 22 times [2018-12-03 16:12:02,129 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:12:02,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:02,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:12:02,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:02,130 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:12:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:03,155 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 16:12:03,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:03,156 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:12:03,156 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:12:03,156 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:12:03,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:03,156 INFO 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 16:12:03,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:12:03,165 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:12:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:03,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:12:04,721 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 16:12:04,721 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:12:06,709 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 16:12:06,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:12:06,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 136 [2018-12-03 16:12:06,728 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:12:06,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-12-03 16:12:06,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-12-03 16:12:06,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5334, Invalid=13298, Unknown=0, NotChecked=0, Total=18632 [2018-12-03 16:12:06,731 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand 92 states. [2018-12-03 16:12:07,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:12:07,079 INFO L93 Difference]: Finished difference Result 125 states and 149 transitions. [2018-12-03 16:12:07,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-12-03 16:12:07,079 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 113 [2018-12-03 16:12:07,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:12:07,080 INFO L225 Difference]: With dead ends: 125 [2018-12-03 16:12:07,080 INFO L226 Difference]: Without dead ends: 123 [2018-12-03 16:12:07,082 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10549 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5334, Invalid=13298, Unknown=0, NotChecked=0, Total=18632 [2018-12-03 16:12:07,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-12-03 16:12:07,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-12-03 16:12:07,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-12-03 16:12:07,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2018-12-03 16:12:07,087 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 113 [2018-12-03 16:12:07,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:12:07,087 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2018-12-03 16:12:07,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-12-03 16:12:07,088 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2018-12-03 16:12:07,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-12-03 16:12:07,088 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:12:07,088 INFO L402 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1] [2018-12-03 16:12:07,088 INFO L423 AbstractCegarLoop]: === Iteration 25 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:12:07,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:12:07,089 INFO L82 PathProgramCache]: Analyzing trace with hash 60773484, now seen corresponding path program 23 times [2018-12-03 16:12:07,089 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:12:07,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:07,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:12:07,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:07,090 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:12:07,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:08,010 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 16:12:08,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:08,011 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:12:08,011 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:12:08,011 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:12:08,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:08,011 INFO 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 16:12:08,020 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:12:08,020 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:12:08,058 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-12-03 16:12:08,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:12:08,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:12:09,666 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 16:12:09,666 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:12:11,762 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 16:12:11,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:12:11,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 142 [2018-12-03 16:12:11,781 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:12:11,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-12-03 16:12:11,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-12-03 16:12:11,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5806, Invalid=14500, Unknown=0, NotChecked=0, Total=20306 [2018-12-03 16:12:11,783 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand 96 states. [2018-12-03 16:12:12,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:12:12,259 INFO L93 Difference]: Finished difference Result 130 states and 155 transitions. [2018-12-03 16:12:12,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-12-03 16:12:12,259 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 118 [2018-12-03 16:12:12,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:12:12,260 INFO L225 Difference]: With dead ends: 130 [2018-12-03 16:12:12,260 INFO L226 Difference]: Without dead ends: 128 [2018-12-03 16:12:12,262 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11523 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5806, Invalid=14500, Unknown=0, NotChecked=0, Total=20306 [2018-12-03 16:12:12,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-12-03 16:12:12,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2018-12-03 16:12:12,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-12-03 16:12:12,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2018-12-03 16:12:12,266 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 118 [2018-12-03 16:12:12,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:12:12,266 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2018-12-03 16:12:12,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-12-03 16:12:12,266 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2018-12-03 16:12:12,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-12-03 16:12:12,267 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:12:12,267 INFO L402 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1] [2018-12-03 16:12:12,267 INFO L423 AbstractCegarLoop]: === Iteration 26 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:12:12,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:12:12,268 INFO L82 PathProgramCache]: Analyzing trace with hash 293310688, now seen corresponding path program 24 times [2018-12-03 16:12:12,268 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:12:12,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:12,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:12:12,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:12,269 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:12:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:13,280 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 16:12:13,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:13,280 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:12:13,280 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:12:13,280 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:12:13,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:13,281 INFO 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 16:12:13,289 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:12:13,289 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:12:13,316 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:12:13,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:12:13,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:12:15,150 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 16:12:15,151 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:12:17,529 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 16:12:17,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:12:17,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 148 [2018-12-03 16:12:17,548 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:12:17,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-12-03 16:12:17,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-12-03 16:12:17,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6298, Invalid=15754, Unknown=0, NotChecked=0, Total=22052 [2018-12-03 16:12:17,551 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand 100 states. [2018-12-03 16:12:18,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:12:18,169 INFO L93 Difference]: Finished difference Result 135 states and 161 transitions. [2018-12-03 16:12:18,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-12-03 16:12:18,169 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 123 [2018-12-03 16:12:18,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:12:18,170 INFO L225 Difference]: With dead ends: 135 [2018-12-03 16:12:18,170 INFO L226 Difference]: Without dead ends: 133 [2018-12-03 16:12:18,172 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 16:12:18,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-12-03 16:12:18,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2018-12-03 16:12:18,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-12-03 16:12:18,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2018-12-03 16:12:18,177 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 123 [2018-12-03 16:12:18,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:12:18,177 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2018-12-03 16:12:18,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-12-03 16:12:18,177 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2018-12-03 16:12:18,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-12-03 16:12:18,178 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:12:18,178 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1] [2018-12-03 16:12:18,178 INFO L423 AbstractCegarLoop]: === Iteration 27 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:12:18,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:12:18,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1977023724, now seen corresponding path program 25 times [2018-12-03 16:12:18,179 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:12:18,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:18,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:12:18,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:18,180 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:12:18,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:19,183 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 16:12:19,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:19,184 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:12:19,184 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:12:19,184 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:12:19,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:19,184 INFO 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 16:12:19,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:12:19,193 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:12:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:19,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:12:21,203 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 16:12:21,203 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:12:23,544 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 16:12:23,565 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:12:23,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 154 [2018-12-03 16:12:23,565 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:12:23,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-12-03 16:12:23,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-12-03 16:12:23,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6810, Invalid=17060, Unknown=0, NotChecked=0, Total=23870 [2018-12-03 16:12:23,567 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand 104 states. [2018-12-03 16:12:23,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:12:23,947 INFO L93 Difference]: Finished difference Result 140 states and 167 transitions. [2018-12-03 16:12:23,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-12-03 16:12:23,947 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 128 [2018-12-03 16:12:23,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:12:23,948 INFO L225 Difference]: With dead ends: 140 [2018-12-03 16:12:23,948 INFO L226 Difference]: Without dead ends: 138 [2018-12-03 16:12:23,949 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13600 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6810, Invalid=17060, Unknown=0, NotChecked=0, Total=23870 [2018-12-03 16:12:23,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-12-03 16:12:23,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2018-12-03 16:12:23,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-12-03 16:12:23,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 160 transitions. [2018-12-03 16:12:23,955 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 160 transitions. Word has length 128 [2018-12-03 16:12:23,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:12:23,955 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 160 transitions. [2018-12-03 16:12:23,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-12-03 16:12:23,955 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 160 transitions. [2018-12-03 16:12:23,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-12-03 16:12:23,955 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:12:23,956 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1] [2018-12-03 16:12:23,956 INFO L423 AbstractCegarLoop]: === Iteration 28 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:12:23,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:12:23,956 INFO L82 PathProgramCache]: Analyzing trace with hash -231131040, now seen corresponding path program 26 times [2018-12-03 16:12:23,956 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:12:23,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:23,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:12:23,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:23,957 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:12:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:25,144 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 16:12:25,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:25,145 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:12:25,145 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:12:25,145 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:12:25,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:25,145 INFO 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 16:12:25,153 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:12:25,154 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:12:25,198 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-12-03 16:12:25,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:12:25,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:12:27,296 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 16:12:27,297 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:12:29,959 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 16:12:29,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:12:29,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 160 [2018-12-03 16:12:29,978 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:12:29,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-12-03 16:12:29,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-12-03 16:12:29,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7342, Invalid=18418, Unknown=0, NotChecked=0, Total=25760 [2018-12-03 16:12:29,980 INFO L87 Difference]: Start difference. First operand 134 states and 160 transitions. Second operand 108 states. [2018-12-03 16:12:30,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:12:30,883 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2018-12-03 16:12:30,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-12-03 16:12:30,884 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 133 [2018-12-03 16:12:30,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:12:30,884 INFO L225 Difference]: With dead ends: 145 [2018-12-03 16:12:30,885 INFO L226 Difference]: Without dead ends: 143 [2018-12-03 16:12:30,885 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14703 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=7342, Invalid=18418, Unknown=0, NotChecked=0, Total=25760 [2018-12-03 16:12:30,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-12-03 16:12:30,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-12-03 16:12:30,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-12-03 16:12:30,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2018-12-03 16:12:30,891 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 133 [2018-12-03 16:12:30,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:12:30,891 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2018-12-03 16:12:30,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-12-03 16:12:30,891 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2018-12-03 16:12:30,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-12-03 16:12:30,892 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:12:30,892 INFO L402 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1] [2018-12-03 16:12:30,892 INFO L423 AbstractCegarLoop]: === Iteration 29 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:12:30,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:12:30,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1458963820, now seen corresponding path program 27 times [2018-12-03 16:12:30,893 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:12:30,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:30,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:12:30,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:30,894 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:12:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:32,143 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 16:12:32,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:32,143 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:12:32,143 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:12:32,144 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:12:32,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:32,144 INFO 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 16:12:32,154 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:12:32,154 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:12:32,188 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:12:32,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:12:32,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:12:34,765 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 16:12:34,765 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:12:37,747 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 16:12:37,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:12:37,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 166 [2018-12-03 16:12:37,766 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:12:37,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-12-03 16:12:37,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-12-03 16:12:37,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7894, Invalid=19828, Unknown=0, NotChecked=0, Total=27722 [2018-12-03 16:12:37,768 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand 112 states. [2018-12-03 16:12:38,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:12:38,328 INFO L93 Difference]: Finished difference Result 150 states and 179 transitions. [2018-12-03 16:12:38,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-12-03 16:12:38,329 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 138 [2018-12-03 16:12:38,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:12:38,330 INFO L225 Difference]: With dead ends: 150 [2018-12-03 16:12:38,330 INFO L226 Difference]: Without dead ends: 148 [2018-12-03 16:12:38,331 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15849 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=7894, Invalid=19828, Unknown=0, NotChecked=0, Total=27722 [2018-12-03 16:12:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-12-03 16:12:38,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2018-12-03 16:12:38,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-12-03 16:12:38,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 172 transitions. [2018-12-03 16:12:38,336 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 172 transitions. Word has length 138 [2018-12-03 16:12:38,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:12:38,337 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 172 transitions. [2018-12-03 16:12:38,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-12-03 16:12:38,337 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 172 transitions. [2018-12-03 16:12:38,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-12-03 16:12:38,338 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:12:38,338 INFO L402 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1] [2018-12-03 16:12:38,338 INFO L423 AbstractCegarLoop]: === Iteration 30 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:12:38,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:12:38,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1839955936, now seen corresponding path program 28 times [2018-12-03 16:12:38,339 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:12:38,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:38,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:12:38,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:38,340 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:12:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:39,865 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 16:12:39,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:39,865 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:12:39,865 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:12:39,866 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:12:39,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:39,866 INFO 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 16:12:39,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:12:39,875 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:12:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:39,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:12:42,222 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 16:12:42,222 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:12:45,040 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 16:12:45,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:12:45,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 172 [2018-12-03 16:12:45,060 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:12:45,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-12-03 16:12:45,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-12-03 16:12:45,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8466, Invalid=21290, Unknown=0, NotChecked=0, Total=29756 [2018-12-03 16:12:45,064 INFO L87 Difference]: Start difference. First operand 144 states and 172 transitions. Second operand 116 states. [2018-12-03 16:12:45,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:12:45,692 INFO L93 Difference]: Finished difference Result 155 states and 185 transitions. [2018-12-03 16:12:45,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-12-03 16:12:45,693 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 143 [2018-12-03 16:12:45,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:12:45,694 INFO L225 Difference]: With dead ends: 155 [2018-12-03 16:12:45,694 INFO L226 Difference]: Without dead ends: 153 [2018-12-03 16:12:45,695 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17038 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=8466, Invalid=21290, Unknown=0, NotChecked=0, Total=29756 [2018-12-03 16:12:45,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-12-03 16:12:45,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2018-12-03 16:12:45,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-12-03 16:12:45,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 178 transitions. [2018-12-03 16:12:45,700 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 178 transitions. Word has length 143 [2018-12-03 16:12:45,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:12:45,700 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 178 transitions. [2018-12-03 16:12:45,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-12-03 16:12:45,700 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 178 transitions. [2018-12-03 16:12:45,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-12-03 16:12:45,701 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:12:45,701 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1] [2018-12-03 16:12:45,701 INFO L423 AbstractCegarLoop]: === Iteration 31 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:12:45,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:12:45,702 INFO L82 PathProgramCache]: Analyzing trace with hash 893677036, now seen corresponding path program 29 times [2018-12-03 16:12:45,702 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:12:45,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:45,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:12:45,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:45,703 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:12:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:47,675 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 16:12:47,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:47,676 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:12:47,676 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:12:47,676 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:12:47,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:47,676 INFO 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 16:12:47,685 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:12:47,685 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:12:47,745 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-12-03 16:12:47,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:12:47,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:12:49,991 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 16:12:49,991 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:12:53,476 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 16:12:53,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:12:53,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 178 [2018-12-03 16:12:53,496 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:12:53,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-12-03 16:12:53,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-12-03 16:12:53,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9058, Invalid=22804, Unknown=0, NotChecked=0, Total=31862 [2018-12-03 16:12:53,498 INFO L87 Difference]: Start difference. First operand 149 states and 178 transitions. Second operand 120 states. [2018-12-03 16:12:54,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:12:54,326 INFO L93 Difference]: Finished difference Result 160 states and 191 transitions. [2018-12-03 16:12:54,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-12-03 16:12:54,327 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 148 [2018-12-03 16:12:54,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:12:54,328 INFO L225 Difference]: With dead ends: 160 [2018-12-03 16:12:54,328 INFO L226 Difference]: Without dead ends: 158 [2018-12-03 16:12:54,329 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18270 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=9058, Invalid=22804, Unknown=0, NotChecked=0, Total=31862 [2018-12-03 16:12:54,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-12-03 16:12:54,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2018-12-03 16:12:54,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-12-03 16:12:54,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 184 transitions. [2018-12-03 16:12:54,336 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 184 transitions. Word has length 148 [2018-12-03 16:12:54,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:12:54,336 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 184 transitions. [2018-12-03 16:12:54,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-12-03 16:12:54,336 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 184 transitions. [2018-12-03 16:12:54,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-12-03 16:12:54,337 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:12:54,337 INFO L402 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1] [2018-12-03 16:12:54,337 INFO L423 AbstractCegarLoop]: === Iteration 32 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:12:54,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:12:54,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1567987872, now seen corresponding path program 30 times [2018-12-03 16:12:54,338 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:12:54,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:54,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:12:54,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:54,339 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:12:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:55,728 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 16:12:55,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:55,728 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:12:55,728 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:12:55,729 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:12:55,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:55,729 INFO 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 16:12:55,737 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:12:55,737 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:12:55,770 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:12:55,770 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:12:55,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:12:58,405 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 16:12:58,406 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:13:01,812 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 16:13:01,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:13:01,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 184 [2018-12-03 16:13:01,831 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:13:01,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-12-03 16:13:01,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-12-03 16:13:01,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9670, Invalid=24370, Unknown=0, NotChecked=0, Total=34040 [2018-12-03 16:13:01,834 INFO L87 Difference]: Start difference. First operand 154 states and 184 transitions. Second operand 124 states. [2018-12-03 16:13:02,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:13:02,496 INFO L93 Difference]: Finished difference Result 165 states and 197 transitions. [2018-12-03 16:13:02,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-12-03 16:13:02,496 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 153 [2018-12-03 16:13:02,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:13:02,497 INFO L225 Difference]: With dead ends: 165 [2018-12-03 16:13:02,498 INFO L226 Difference]: Without dead ends: 163 [2018-12-03 16:13:02,499 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19545 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=9670, Invalid=24370, Unknown=0, NotChecked=0, Total=34040 [2018-12-03 16:13:02,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-12-03 16:13:02,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-12-03 16:13:02,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-12-03 16:13:02,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 190 transitions. [2018-12-03 16:13:02,506 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 190 transitions. Word has length 153 [2018-12-03 16:13:02,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:13:02,506 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 190 transitions. [2018-12-03 16:13:02,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-12-03 16:13:02,506 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 190 transitions. [2018-12-03 16:13:02,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-12-03 16:13:02,507 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:13:02,507 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1] [2018-12-03 16:13:02,507 INFO L423 AbstractCegarLoop]: === Iteration 33 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:13:02,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:13:02,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1695168108, now seen corresponding path program 31 times [2018-12-03 16:13:02,508 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:13:02,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:02,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:13:02,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:02,509 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:13:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:13:04,484 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 16:13:04,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:04,484 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:13:04,484 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:13:04,484 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:13:04,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:04,485 INFO 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 16:13:04,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:13:04,494 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:13:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:13:04,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:13:07,314 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 16:13:07,314 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:13:10,853 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 16:13:10,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:13:10,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 190 [2018-12-03 16:13:10,874 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:13:10,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-12-03 16:13:10,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-12-03 16:13:10,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10302, Invalid=25988, Unknown=0, NotChecked=0, Total=36290 [2018-12-03 16:13:10,877 INFO L87 Difference]: Start difference. First operand 159 states and 190 transitions. Second operand 128 states. [2018-12-03 16:13:11,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:13:11,572 INFO L93 Difference]: Finished difference Result 170 states and 203 transitions. [2018-12-03 16:13:11,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-12-03 16:13:11,572 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 158 [2018-12-03 16:13:11,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:13:11,573 INFO L225 Difference]: With dead ends: 170 [2018-12-03 16:13:11,573 INFO L226 Difference]: Without dead ends: 168 [2018-12-03 16:13:11,575 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20863 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=10302, Invalid=25988, Unknown=0, NotChecked=0, Total=36290 [2018-12-03 16:13:11,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-12-03 16:13:11,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2018-12-03 16:13:11,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-12-03 16:13:11,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 196 transitions. [2018-12-03 16:13:11,581 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 196 transitions. Word has length 158 [2018-12-03 16:13:11,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:13:11,581 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 196 transitions. [2018-12-03 16:13:11,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-12-03 16:13:11,582 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 196 transitions. [2018-12-03 16:13:11,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-12-03 16:13:11,582 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:13:11,583 INFO L402 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1] [2018-12-03 16:13:11,583 INFO L423 AbstractCegarLoop]: === Iteration 34 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:13:11,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:13:11,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1450316064, now seen corresponding path program 32 times [2018-12-03 16:13:11,583 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:13:11,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:11,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:13:11,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:11,584 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:13:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:13:14,545 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 16:13:14,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:14,546 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:13:14,546 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:13:14,546 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:13:14,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:14,546 INFO 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 16:13:14,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:13:14,556 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:13:14,646 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-12-03 16:13:14,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:13:14,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:13:17,736 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 16:13:17,737 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:13:21,375 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 16:13:21,394 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:13:21,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 196 [2018-12-03 16:13:21,394 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:13:21,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-12-03 16:13:21,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-12-03 16:13:21,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10954, Invalid=27658, Unknown=0, NotChecked=0, Total=38612 [2018-12-03 16:13:21,399 INFO L87 Difference]: Start difference. First operand 164 states and 196 transitions. Second operand 132 states. [2018-12-03 16:13:22,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:13:22,140 INFO L93 Difference]: Finished difference Result 175 states and 209 transitions. [2018-12-03 16:13:22,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-12-03 16:13:22,140 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 163 [2018-12-03 16:13:22,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:13:22,141 INFO L225 Difference]: With dead ends: 175 [2018-12-03 16:13:22,142 INFO L226 Difference]: Without dead ends: 173 [2018-12-03 16:13:22,144 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22224 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=10954, Invalid=27658, Unknown=0, NotChecked=0, Total=38612 [2018-12-03 16:13:22,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-12-03 16:13:22,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2018-12-03 16:13:22,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-12-03 16:13:22,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 202 transitions. [2018-12-03 16:13:22,150 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 202 transitions. Word has length 163 [2018-12-03 16:13:22,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:13:22,151 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 202 transitions. [2018-12-03 16:13:22,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-12-03 16:13:22,151 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 202 transitions. [2018-12-03 16:13:22,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-12-03 16:13:22,152 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:13:22,152 INFO L402 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1] [2018-12-03 16:13:22,152 INFO L423 AbstractCegarLoop]: === Iteration 35 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:13:22,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:13:22,152 INFO L82 PathProgramCache]: Analyzing trace with hash -2138087700, now seen corresponding path program 33 times [2018-12-03 16:13:22,152 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:13:22,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:22,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:13:22,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:22,153 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:13:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:13:24,315 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 16:13:24,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:24,315 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:13:24,315 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:13:24,315 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:13:24,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:24,315 INFO 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 16:13:24,324 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:13:24,324 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:13:24,365 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:13:24,365 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:13:24,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:13:27,538 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 16:13:27,539 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:13:31,267 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 16:13:31,299 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:13:31,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 202 [2018-12-03 16:13:31,300 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:13:31,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-12-03 16:13:31,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-12-03 16:13:31,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11626, Invalid=29380, Unknown=0, NotChecked=0, Total=41006 [2018-12-03 16:13:31,305 INFO L87 Difference]: Start difference. First operand 169 states and 202 transitions. Second operand 136 states. [2018-12-03 16:13:32,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:13:32,317 INFO L93 Difference]: Finished difference Result 180 states and 215 transitions. [2018-12-03 16:13:32,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-12-03 16:13:32,317 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 168 [2018-12-03 16:13:32,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:13:32,318 INFO L225 Difference]: With dead ends: 180 [2018-12-03 16:13:32,319 INFO L226 Difference]: Without dead ends: 178 [2018-12-03 16:13:32,321 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23628 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=11626, Invalid=29380, Unknown=0, NotChecked=0, Total=41006 [2018-12-03 16:13:32,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-12-03 16:13:32,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2018-12-03 16:13:32,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-12-03 16:13:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 208 transitions. [2018-12-03 16:13:32,328 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 208 transitions. Word has length 168 [2018-12-03 16:13:32,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:13:32,328 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 208 transitions. [2018-12-03 16:13:32,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-12-03 16:13:32,329 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 208 transitions. [2018-12-03 16:13:32,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-12-03 16:13:32,329 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:13:32,330 INFO L402 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1] [2018-12-03 16:13:32,330 INFO L423 AbstractCegarLoop]: === Iteration 36 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:13:32,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:13:32,330 INFO L82 PathProgramCache]: Analyzing trace with hash 359536224, now seen corresponding path program 34 times [2018-12-03 16:13:32,330 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:13:32,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:32,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:13:32,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:32,331 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:13:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:13:34,133 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 16:13:34,133 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:34,133 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:13:34,133 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:13:34,133 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:13:34,133 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:34,134 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 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 16:13:34,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:13:34,142 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:13:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:13:34,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:13:38,513 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 16:13:38,514 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:13:42,823 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 16:13:42,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:13:42,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 208 [2018-12-03 16:13:42,851 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:13:42,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-12-03 16:13:42,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-12-03 16:13:42,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12318, Invalid=31154, Unknown=0, NotChecked=0, Total=43472 [2018-12-03 16:13:42,855 INFO L87 Difference]: Start difference. First operand 174 states and 208 transitions. Second operand 140 states. [2018-12-03 16:13:43,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:13:43,796 INFO L93 Difference]: Finished difference Result 185 states and 221 transitions. [2018-12-03 16:13:43,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-12-03 16:13:43,796 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 173 [2018-12-03 16:13:43,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:13:43,797 INFO L225 Difference]: With dead ends: 185 [2018-12-03 16:13:43,797 INFO L226 Difference]: Without dead ends: 183 [2018-12-03 16:13:43,799 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25075 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=12318, Invalid=31154, Unknown=0, NotChecked=0, Total=43472 [2018-12-03 16:13:43,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-12-03 16:13:43,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-12-03 16:13:43,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-12-03 16:13:43,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 214 transitions. [2018-12-03 16:13:43,806 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 214 transitions. Word has length 173 [2018-12-03 16:13:43,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:13:43,807 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 214 transitions. [2018-12-03 16:13:43,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-12-03 16:13:43,807 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 214 transitions. [2018-12-03 16:13:43,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-12-03 16:13:43,808 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:13:43,808 INFO L402 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1] [2018-12-03 16:13:43,808 INFO L423 AbstractCegarLoop]: === Iteration 37 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:13:43,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:13:43,809 INFO L82 PathProgramCache]: Analyzing trace with hash -400824468, now seen corresponding path program 35 times [2018-12-03 16:13:43,809 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:13:43,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:43,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:13:43,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:43,810 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:13:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:13:45,989 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 16:13:45,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:45,989 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:13:45,989 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:13:45,989 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:13:45,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:45,990 INFO 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 16:13:46,000 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:13:46,000 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:13:46,073 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-12-03 16:13:46,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:13:46,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:13:49,844 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 16:13:49,844 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:13:54,254 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 16:13:54,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:13:54,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 214 [2018-12-03 16:13:54,274 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:13:54,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-12-03 16:13:54,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-12-03 16:13:54,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13030, Invalid=32980, Unknown=0, NotChecked=0, Total=46010 [2018-12-03 16:13:54,279 INFO L87 Difference]: Start difference. First operand 179 states and 214 transitions. Second operand 144 states. [2018-12-03 16:13:55,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:13:55,143 INFO L93 Difference]: Finished difference Result 190 states and 227 transitions. [2018-12-03 16:13:55,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-12-03 16:13:55,143 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 178 [2018-12-03 16:13:55,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:13:55,144 INFO L225 Difference]: With dead ends: 190 [2018-12-03 16:13:55,144 INFO L226 Difference]: Without dead ends: 188 [2018-12-03 16:13:55,145 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26565 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=13030, Invalid=32980, Unknown=0, NotChecked=0, Total=46010 [2018-12-03 16:13:55,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-12-03 16:13:55,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2018-12-03 16:13:55,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-12-03 16:13:55,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2018-12-03 16:13:55,152 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 178 [2018-12-03 16:13:55,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:13:55,152 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2018-12-03 16:13:55,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-12-03 16:13:55,152 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2018-12-03 16:13:55,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-12-03 16:13:55,153 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:13:55,153 INFO L402 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1] [2018-12-03 16:13:55,154 INFO L423 AbstractCegarLoop]: === Iteration 38 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:13:55,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:13:55,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1927470560, now seen corresponding path program 36 times [2018-12-03 16:13:55,154 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:13:55,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:55,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:13:55,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:55,155 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:13:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:13:57,204 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 16:13:57,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:57,204 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:13:57,205 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:13:57,205 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:13:57,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:57,205 INFO 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 16:13:57,214 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:13:57,215 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:13:57,257 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:13:57,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:13:57,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:14:00,723 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 16:14:00,723 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:14:05,508 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 16:14:05,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:14:05,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 220 [2018-12-03 16:14:05,527 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:14:05,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-12-03 16:14:05,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-12-03 16:14:05,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13762, Invalid=34858, Unknown=0, NotChecked=0, Total=48620 [2018-12-03 16:14:05,531 INFO L87 Difference]: Start difference. First operand 184 states and 220 transitions. Second operand 148 states. [2018-12-03 16:14:06,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:14:06,593 INFO L93 Difference]: Finished difference Result 195 states and 233 transitions. [2018-12-03 16:14:06,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-12-03 16:14:06,593 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 183 [2018-12-03 16:14:06,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:14:06,594 INFO L225 Difference]: With dead ends: 195 [2018-12-03 16:14:06,595 INFO L226 Difference]: Without dead ends: 193 [2018-12-03 16:14:06,597 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28098 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=13762, Invalid=34858, Unknown=0, NotChecked=0, Total=48620 [2018-12-03 16:14:06,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-12-03 16:14:06,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2018-12-03 16:14:06,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-12-03 16:14:06,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 226 transitions. [2018-12-03 16:14:06,605 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 226 transitions. Word has length 183 [2018-12-03 16:14:06,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:14:06,605 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 226 transitions. [2018-12-03 16:14:06,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-12-03 16:14:06,605 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 226 transitions. [2018-12-03 16:14:06,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-12-03 16:14:06,606 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:14:06,606 INFO L402 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1] [2018-12-03 16:14:06,606 INFO L423 AbstractCegarLoop]: === Iteration 39 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:14:06,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:14:06,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1106759660, now seen corresponding path program 37 times [2018-12-03 16:14:06,607 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:14:06,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:06,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:14:06,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:06,608 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:14:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:14:09,233 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 16:14:09,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:14:09,233 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:14:09,234 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:14:09,234 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:14:09,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:14:09,234 INFO 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 16:14:09,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:14:09,244 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:14:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:14:09,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:14:12,770 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 16:14:12,770 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:14:17,790 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 16:14:17,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:14:17,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 226 [2018-12-03 16:14:17,809 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:14:17,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-12-03 16:14:17,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-12-03 16:14:17,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14514, Invalid=36788, Unknown=0, NotChecked=0, Total=51302 [2018-12-03 16:14:17,813 INFO L87 Difference]: Start difference. First operand 189 states and 226 transitions. Second operand 152 states. [2018-12-03 16:14:19,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:14:19,087 INFO L93 Difference]: Finished difference Result 200 states and 239 transitions. [2018-12-03 16:14:19,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-12-03 16:14:19,087 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 188 [2018-12-03 16:14:19,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:14:19,088 INFO L225 Difference]: With dead ends: 200 [2018-12-03 16:14:19,088 INFO L226 Difference]: Without dead ends: 198 [2018-12-03 16:14:19,093 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29674 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=14514, Invalid=36788, Unknown=0, NotChecked=0, Total=51302 [2018-12-03 16:14:19,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-12-03 16:14:19,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2018-12-03 16:14:19,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-12-03 16:14:19,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 232 transitions. [2018-12-03 16:14:19,099 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 232 transitions. Word has length 188 [2018-12-03 16:14:19,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:14:19,100 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 232 transitions. [2018-12-03 16:14:19,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-12-03 16:14:19,100 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 232 transitions. [2018-12-03 16:14:19,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-12-03 16:14:19,101 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:14:19,101 INFO L402 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1] [2018-12-03 16:14:19,101 INFO L423 AbstractCegarLoop]: === Iteration 40 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:14:19,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:14:19,101 INFO L82 PathProgramCache]: Analyzing trace with hash -928758432, now seen corresponding path program 38 times [2018-12-03 16:14:19,101 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:14:19,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:19,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:14:19,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:19,102 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:14:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:14:21,335 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 16:14:21,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:14:21,336 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:14:21,336 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:14:21,336 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:14:21,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:14:21,336 INFO 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 16:14:21,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:14:21,345 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:14:21,760 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-12-03 16:14:21,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:14:21,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:14:25,618 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 16:14:25,618 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:14:30,973 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 16:14:30,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:14:30,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 232 [2018-12-03 16:14:30,994 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:14:30,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-12-03 16:14:30,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-12-03 16:14:30,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15286, Invalid=38770, Unknown=0, NotChecked=0, Total=54056 [2018-12-03 16:14:30,997 INFO L87 Difference]: Start difference. First operand 194 states and 232 transitions. Second operand 156 states. [2018-12-03 16:14:32,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:14:32,199 INFO L93 Difference]: Finished difference Result 205 states and 245 transitions. [2018-12-03 16:14:32,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-12-03 16:14:32,200 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 193 [2018-12-03 16:14:32,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:14:32,201 INFO L225 Difference]: With dead ends: 205 [2018-12-03 16:14:32,201 INFO L226 Difference]: Without dead ends: 203 [2018-12-03 16:14:32,203 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31293 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=15286, Invalid=38770, Unknown=0, NotChecked=0, Total=54056 [2018-12-03 16:14:32,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-12-03 16:14:32,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-12-03 16:14:32,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-12-03 16:14:32,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 238 transitions. [2018-12-03 16:14:32,209 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 238 transitions. Word has length 193 [2018-12-03 16:14:32,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:14:32,210 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 238 transitions. [2018-12-03 16:14:32,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-12-03 16:14:32,210 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 238 transitions. [2018-12-03 16:14:32,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-12-03 16:14:32,211 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:14:32,211 INFO L402 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1] [2018-12-03 16:14:32,211 INFO L423 AbstractCegarLoop]: === Iteration 41 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:14:32,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:14:32,212 INFO L82 PathProgramCache]: Analyzing trace with hash -93644692, now seen corresponding path program 39 times [2018-12-03 16:14:32,212 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:14:32,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:32,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:14:32,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:32,213 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:14:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:14:35,549 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 16:14:35,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:14:35,550 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:14:35,550 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:14:35,550 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:14:35,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:14:35,550 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 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 16:14:35,560 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:14:35,560 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:14:35,601 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:14:35,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:14:35,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:14:39,693 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 16:14:39,693 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:14:45,143 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 16:14:45,163 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:14:45,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 238 [2018-12-03 16:14:45,163 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:14:45,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-12-03 16:14:45,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-12-03 16:14:45,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16078, Invalid=40804, Unknown=0, NotChecked=0, Total=56882 [2018-12-03 16:14:45,166 INFO L87 Difference]: Start difference. First operand 199 states and 238 transitions. Second operand 160 states. [2018-12-03 16:14:46,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:14:46,318 INFO L93 Difference]: Finished difference Result 210 states and 251 transitions. [2018-12-03 16:14:46,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-12-03 16:14:46,319 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 198 [2018-12-03 16:14:46,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:14:46,320 INFO L225 Difference]: With dead ends: 210 [2018-12-03 16:14:46,320 INFO L226 Difference]: Without dead ends: 208 [2018-12-03 16:14:46,321 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32955 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=16078, Invalid=40804, Unknown=0, NotChecked=0, Total=56882 [2018-12-03 16:14:46,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-12-03 16:14:46,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2018-12-03 16:14:46,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-12-03 16:14:46,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 244 transitions. [2018-12-03 16:14:46,328 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 244 transitions. Word has length 198 [2018-12-03 16:14:46,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:14:46,328 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 244 transitions. [2018-12-03 16:14:46,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-12-03 16:14:46,328 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 244 transitions. [2018-12-03 16:14:46,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-12-03 16:14:46,329 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:14:46,329 INFO L402 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1] [2018-12-03 16:14:46,330 INFO L423 AbstractCegarLoop]: === Iteration 42 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:14:46,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:14:46,330 INFO L82 PathProgramCache]: Analyzing trace with hash 392842464, now seen corresponding path program 40 times [2018-12-03 16:14:46,330 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:14:46,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:46,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:14:46,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:46,331 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:14:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:14:48,677 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 16:14:48,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:14:48,677 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:14:48,677 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:14:48,677 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:14:48,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:14:48,678 INFO 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 16:14:48,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:14:48,686 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:14:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:14:48,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:14:52,899 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 16:14:52,899 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:14:58,644 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 16:14:58,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:14:58,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 244 [2018-12-03 16:14:58,664 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:14:58,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-12-03 16:14:58,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-12-03 16:14:58,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16890, Invalid=42890, Unknown=0, NotChecked=0, Total=59780 [2018-12-03 16:14:58,668 INFO L87 Difference]: Start difference. First operand 204 states and 244 transitions. Second operand 164 states. [2018-12-03 16:14:59,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:14:59,939 INFO L93 Difference]: Finished difference Result 215 states and 257 transitions. [2018-12-03 16:14:59,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-12-03 16:14:59,940 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 203 [2018-12-03 16:14:59,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:14:59,941 INFO L225 Difference]: With dead ends: 215 [2018-12-03 16:14:59,941 INFO L226 Difference]: Without dead ends: 213 [2018-12-03 16:14:59,943 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34660 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=16890, Invalid=42890, Unknown=0, NotChecked=0, Total=59780 [2018-12-03 16:14:59,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-12-03 16:14:59,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 209. [2018-12-03 16:14:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-12-03 16:14:59,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 250 transitions. [2018-12-03 16:14:59,949 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 250 transitions. Word has length 203 [2018-12-03 16:14:59,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:14:59,949 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 250 transitions. [2018-12-03 16:14:59,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-12-03 16:14:59,949 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 250 transitions. [2018-12-03 16:14:59,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-12-03 16:14:59,950 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:14:59,951 INFO L402 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1] [2018-12-03 16:14:59,951 INFO L423 AbstractCegarLoop]: === Iteration 43 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:14:59,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:14:59,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1010974484, now seen corresponding path program 41 times [2018-12-03 16:14:59,951 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:14:59,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:59,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:14:59,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:59,952 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:14:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:15:02,494 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 16:15:02,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:15:02,494 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:15:02,495 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:15:02,495 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:15:02,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:15:02,495 INFO 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 16:15:02,506 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:15:02,506 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:15:02,575 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-12-03 16:15:02,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:15:02,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:15:07,546 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 16:15:07,547 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:15:13,824 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 16:15:13,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:15:13,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84, 84] total 250 [2018-12-03 16:15:13,843 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:15:13,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-12-03 16:15:13,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-12-03 16:15:13,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17722, Invalid=45028, Unknown=0, NotChecked=0, Total=62750 [2018-12-03 16:15:13,847 INFO L87 Difference]: Start difference. First operand 209 states and 250 transitions. Second operand 168 states. [2018-12-03 16:15:15,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:15:15,183 INFO L93 Difference]: Finished difference Result 220 states and 263 transitions. [2018-12-03 16:15:15,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-12-03 16:15:15,184 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 208 [2018-12-03 16:15:15,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:15:15,185 INFO L225 Difference]: With dead ends: 220 [2018-12-03 16:15:15,185 INFO L226 Difference]: Without dead ends: 218 [2018-12-03 16:15:15,187 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36408 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=17722, Invalid=45028, Unknown=0, NotChecked=0, Total=62750 [2018-12-03 16:15:15,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-12-03 16:15:15,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 214. [2018-12-03 16:15:15,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-12-03 16:15:15,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 256 transitions. [2018-12-03 16:15:15,194 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 256 transitions. Word has length 208 [2018-12-03 16:15:15,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:15:15,195 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 256 transitions. [2018-12-03 16:15:15,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-12-03 16:15:15,195 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 256 transitions. [2018-12-03 16:15:15,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-12-03 16:15:15,196 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:15:15,196 INFO L402 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1] [2018-12-03 16:15:15,196 INFO L423 AbstractCegarLoop]: === Iteration 44 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:15:15,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:15:15,196 INFO L82 PathProgramCache]: Analyzing trace with hash -638782368, now seen corresponding path program 42 times [2018-12-03 16:15:15,197 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:15:15,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:15:15,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:15:15,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:15:15,198 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:15:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:15:17,895 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 16:15:17,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:15:17,896 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:15:17,896 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:15:17,896 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:15:17,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:15:17,896 INFO 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 16:15:17,905 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:15:17,905 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:15:17,954 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:15:17,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:15:17,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:15:22,550 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 16:15:22,550 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:15:28,930 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 16:15:28,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:15:28,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86, 86] total 256 [2018-12-03 16:15:28,950 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:15:28,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-12-03 16:15:28,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-12-03 16:15:28,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18574, Invalid=47218, Unknown=0, NotChecked=0, Total=65792 [2018-12-03 16:15:28,953 INFO L87 Difference]: Start difference. First operand 214 states and 256 transitions. Second operand 172 states. [2018-12-03 16:15:30,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:15:30,342 INFO L93 Difference]: Finished difference Result 225 states and 269 transitions. [2018-12-03 16:15:30,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-12-03 16:15:30,342 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 213 [2018-12-03 16:15:30,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:15:30,343 INFO L225 Difference]: With dead ends: 225 [2018-12-03 16:15:30,343 INFO L226 Difference]: Without dead ends: 223 [2018-12-03 16:15:30,345 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38199 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=18574, Invalid=47218, Unknown=0, NotChecked=0, Total=65792 [2018-12-03 16:15:30,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-12-03 16:15:30,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2018-12-03 16:15:30,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-12-03 16:15:30,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 262 transitions. [2018-12-03 16:15:30,350 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 262 transitions. Word has length 213 [2018-12-03 16:15:30,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:15:30,350 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 262 transitions. [2018-12-03 16:15:30,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-12-03 16:15:30,350 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 262 transitions. [2018-12-03 16:15:30,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-12-03 16:15:30,351 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:15:30,351 INFO L402 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1] [2018-12-03 16:15:30,351 INFO L423 AbstractCegarLoop]: === Iteration 45 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:15:30,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:15:30,352 INFO L82 PathProgramCache]: Analyzing trace with hash 372754796, now seen corresponding path program 43 times [2018-12-03 16:15:30,352 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:15:30,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:15:30,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:15:30,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:15:30,353 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:15:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:15:33,050 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 16:15:33,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:15:33,051 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:15:33,051 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:15:33,051 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:15:33,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:15:33,051 INFO 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 16:15:33,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:15:33,061 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:15:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:15:33,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:15:37,923 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 16:15:37,924 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:15:44,653 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 16:15:44,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:15:44,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88, 88] total 262 [2018-12-03 16:15:44,673 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:15:44,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-12-03 16:15:44,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-12-03 16:15:44,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19446, Invalid=49460, Unknown=0, NotChecked=0, Total=68906 [2018-12-03 16:15:44,677 INFO L87 Difference]: Start difference. First operand 219 states and 262 transitions. Second operand 176 states. [2018-12-03 16:15:46,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:15:46,171 INFO L93 Difference]: Finished difference Result 230 states and 275 transitions. [2018-12-03 16:15:46,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-12-03 16:15:46,171 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 218 [2018-12-03 16:15:46,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:15:46,173 INFO L225 Difference]: With dead ends: 230 [2018-12-03 16:15:46,173 INFO L226 Difference]: Without dead ends: 228 [2018-12-03 16:15:46,175 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40033 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=19446, Invalid=49460, Unknown=0, NotChecked=0, Total=68906 [2018-12-03 16:15:46,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-12-03 16:15:46,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2018-12-03 16:15:46,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-12-03 16:15:46,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 268 transitions. [2018-12-03 16:15:46,180 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 268 transitions. Word has length 218 [2018-12-03 16:15:46,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:15:46,180 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 268 transitions. [2018-12-03 16:15:46,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-12-03 16:15:46,180 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 268 transitions. [2018-12-03 16:15:46,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-12-03 16:15:46,181 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:15:46,181 INFO L402 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1] [2018-12-03 16:15:46,181 INFO L423 AbstractCegarLoop]: === Iteration 46 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:15:46,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:15:46,182 INFO L82 PathProgramCache]: Analyzing trace with hash -2065417248, now seen corresponding path program 44 times [2018-12-03 16:15:46,182 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:15:46,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:15:46,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:15:46,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:15:46,182 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:15:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:15:48,867 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 16:15:48,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:15:48,867 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:15:48,868 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:15:48,868 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:15:48,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:15:48,868 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:15:48,916 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:15:48,917 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:15:48,992 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-12-03 16:15:48,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:15:48,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:15:53,912 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 16:15:53,913 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:16:00,882 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 16:16:00,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:16:00,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90, 90] total 268 [2018-12-03 16:16:00,903 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:16:00,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-12-03 16:16:00,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-12-03 16:16:00,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20338, Invalid=51754, Unknown=0, NotChecked=0, Total=72092 [2018-12-03 16:16:00,908 INFO L87 Difference]: Start difference. First operand 224 states and 268 transitions. Second operand 180 states. [2018-12-03 16:16:02,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:16:02,691 INFO L93 Difference]: Finished difference Result 235 states and 281 transitions. [2018-12-03 16:16:02,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-12-03 16:16:02,692 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 223 [2018-12-03 16:16:02,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:16:02,693 INFO L225 Difference]: With dead ends: 235 [2018-12-03 16:16:02,693 INFO L226 Difference]: Without dead ends: 233 [2018-12-03 16:16:02,695 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41910 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=20338, Invalid=51754, Unknown=0, NotChecked=0, Total=72092 [2018-12-03 16:16:02,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-12-03 16:16:02,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2018-12-03 16:16:02,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-12-03 16:16:02,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 274 transitions. [2018-12-03 16:16:02,702 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 274 transitions. Word has length 223 [2018-12-03 16:16:02,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:16:02,702 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 274 transitions. [2018-12-03 16:16:02,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-12-03 16:16:02,702 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 274 transitions. [2018-12-03 16:16:02,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-12-03 16:16:02,703 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:16:02,703 INFO L402 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1] [2018-12-03 16:16:02,704 INFO L423 AbstractCegarLoop]: === Iteration 47 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:16:02,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:16:02,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1340001812, now seen corresponding path program 45 times [2018-12-03 16:16:02,704 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:16:02,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:16:02,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:16:02,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:16:02,705 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:16:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:16:05,588 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 16:16:05,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:16:05,588 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:16:05,588 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:16:05,588 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:16:05,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:16:05,589 INFO 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 16:16:05,602 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:16:05,602 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:16:05,653 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:16:05,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:16:05,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:16:10,853 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 16:16:10,854 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:16:18,271 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 16:16:18,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:16:18,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92, 92] total 274 [2018-12-03 16:16:18,290 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:16:18,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 184 states [2018-12-03 16:16:18,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2018-12-03 16:16:18,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21250, Invalid=54100, Unknown=0, NotChecked=0, Total=75350 [2018-12-03 16:16:18,295 INFO L87 Difference]: Start difference. First operand 229 states and 274 transitions. Second operand 184 states. [2018-12-03 16:16:20,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:16:20,053 INFO L93 Difference]: Finished difference Result 240 states and 287 transitions. [2018-12-03 16:16:20,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-12-03 16:16:20,054 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 228 [2018-12-03 16:16:20,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:16:20,055 INFO L225 Difference]: With dead ends: 240 [2018-12-03 16:16:20,055 INFO L226 Difference]: Without dead ends: 238 [2018-12-03 16:16:20,057 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43830 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=21250, Invalid=54100, Unknown=0, NotChecked=0, Total=75350 [2018-12-03 16:16:20,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-12-03 16:16:20,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2018-12-03 16:16:20,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-12-03 16:16:20,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 280 transitions. [2018-12-03 16:16:20,065 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 280 transitions. Word has length 228 [2018-12-03 16:16:20,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:16:20,065 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 280 transitions. [2018-12-03 16:16:20,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 184 states. [2018-12-03 16:16:20,065 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 280 transitions. [2018-12-03 16:16:20,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-12-03 16:16:20,066 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:16:20,067 INFO L402 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1] [2018-12-03 16:16:20,067 INFO L423 AbstractCegarLoop]: === Iteration 48 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:16:20,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:16:20,067 INFO L82 PathProgramCache]: Analyzing trace with hash 117973856, now seen corresponding path program 46 times [2018-12-03 16:16:20,067 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:16:20,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:16:20,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:16:20,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:16:20,068 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:16:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:16:23,401 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 16:16:23,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:16:23,401 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:16:23,401 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:16:23,401 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:16:23,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:16:23,402 INFO 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 16:16:23,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:16:23,411 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:16:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:16:23,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:16:29,288 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 16:16:29,289 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:16:37,217 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 16:16:37,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:16:37,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94, 94] total 280 [2018-12-03 16:16:37,236 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:16:37,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 188 states [2018-12-03 16:16:37,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2018-12-03 16:16:37,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22182, Invalid=56498, Unknown=0, NotChecked=0, Total=78680 [2018-12-03 16:16:37,240 INFO L87 Difference]: Start difference. First operand 234 states and 280 transitions. Second operand 188 states. [2018-12-03 16:16:39,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:16:39,119 INFO L93 Difference]: Finished difference Result 245 states and 293 transitions. [2018-12-03 16:16:39,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-12-03 16:16:39,119 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 233 [2018-12-03 16:16:39,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:16:39,121 INFO L225 Difference]: With dead ends: 245 [2018-12-03 16:16:39,121 INFO L226 Difference]: Without dead ends: 243 [2018-12-03 16:16:39,124 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45793 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=22182, Invalid=56498, Unknown=0, NotChecked=0, Total=78680 [2018-12-03 16:16:39,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-12-03 16:16:39,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2018-12-03 16:16:39,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-12-03 16:16:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 286 transitions. [2018-12-03 16:16:39,131 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 286 transitions. Word has length 233 [2018-12-03 16:16:39,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:16:39,132 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 286 transitions. [2018-12-03 16:16:39,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 188 states. [2018-12-03 16:16:39,132 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 286 transitions. [2018-12-03 16:16:39,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-12-03 16:16:39,133 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:16:39,133 INFO L402 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1] [2018-12-03 16:16:39,134 INFO L423 AbstractCegarLoop]: === Iteration 49 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:16:39,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:16:39,134 INFO L82 PathProgramCache]: Analyzing trace with hash 365034092, now seen corresponding path program 47 times [2018-12-03 16:16:39,134 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:16:39,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:16:39,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:16:39,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:16:39,135 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:16:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:16:42,518 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 16:16:42,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:16:42,518 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:16:42,518 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:16:42,518 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:16:42,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:16:42,518 INFO 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 16:16:42,527 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:16:42,527 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:16:42,623 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-12-03 16:16:42,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:16:42,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:16:48,207 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 16:16:48,208 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:16:56,081 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 16:16:56,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:16:56,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 286 [2018-12-03 16:16:56,101 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:16:56,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2018-12-03 16:16:56,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2018-12-03 16:16:56,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23134, Invalid=58948, Unknown=0, NotChecked=0, Total=82082 [2018-12-03 16:16:56,106 INFO L87 Difference]: Start difference. First operand 239 states and 286 transitions. Second operand 192 states. [2018-12-03 16:16:57,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:16:57,922 INFO L93 Difference]: Finished difference Result 250 states and 299 transitions. [2018-12-03 16:16:57,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-12-03 16:16:57,923 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 238 [2018-12-03 16:16:57,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:16:57,924 INFO L225 Difference]: With dead ends: 250 [2018-12-03 16:16:57,924 INFO L226 Difference]: Without dead ends: 248 [2018-12-03 16:16:57,926 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 16:16:57,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-12-03 16:16:57,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2018-12-03 16:16:57,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-12-03 16:16:57,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 292 transitions. [2018-12-03 16:16:57,932 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 292 transitions. Word has length 238 [2018-12-03 16:16:57,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:16:57,932 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 292 transitions. [2018-12-03 16:16:57,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 192 states. [2018-12-03 16:16:57,932 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 292 transitions. [2018-12-03 16:16:57,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-12-03 16:16:57,933 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:16:57,933 INFO L402 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1] [2018-12-03 16:16:57,933 INFO L423 AbstractCegarLoop]: === Iteration 50 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:16:57,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:16:57,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1225829088, now seen corresponding path program 48 times [2018-12-03 16:16:57,934 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:16:57,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:16:57,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:16:57,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:16:57,934 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:16:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:17:01,069 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 16:17:01,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:17:01,070 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:17:01,070 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:17:01,070 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:17:01,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:17:01,070 INFO 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 16:17:01,082 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:17:01,082 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:17:01,137 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:17:01,138 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:17:01,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:17:06,950 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 16:17:06,950 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:17:15,516 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 16:17:15,535 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:17:15,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 292 [2018-12-03 16:17:15,536 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:17:15,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 196 states [2018-12-03 16:17:15,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2018-12-03 16:17:15,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24106, Invalid=61450, Unknown=0, NotChecked=0, Total=85556 [2018-12-03 16:17:15,540 INFO L87 Difference]: Start difference. First operand 244 states and 292 transitions. Second operand 196 states. [2018-12-03 16:17:17,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:17:17,494 INFO L93 Difference]: Finished difference Result 255 states and 305 transitions. [2018-12-03 16:17:17,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-12-03 16:17:17,495 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 243 [2018-12-03 16:17:17,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:17:17,496 INFO L225 Difference]: With dead ends: 255 [2018-12-03 16:17:17,496 INFO L226 Difference]: Without dead ends: 253 [2018-12-03 16:17:17,498 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49848 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=24106, Invalid=61450, Unknown=0, NotChecked=0, Total=85556 [2018-12-03 16:17:17,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-12-03 16:17:17,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2018-12-03 16:17:17,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-12-03 16:17:17,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 298 transitions. [2018-12-03 16:17:17,503 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 298 transitions. Word has length 243 [2018-12-03 16:17:17,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:17:17,504 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 298 transitions. [2018-12-03 16:17:17,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 196 states. [2018-12-03 16:17:17,504 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 298 transitions. [2018-12-03 16:17:17,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-12-03 16:17:17,505 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:17:17,505 INFO L402 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1] [2018-12-03 16:17:17,505 INFO L423 AbstractCegarLoop]: === Iteration 51 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:17:17,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:17:17,505 INFO L82 PathProgramCache]: Analyzing trace with hash 291644140, now seen corresponding path program 49 times [2018-12-03 16:17:17,506 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:17:17,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:17:17,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:17:17,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:17:17,506 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:17:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:17:20,988 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 16:17:20,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:17:20,989 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:17:20,989 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:17:20,989 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:17:20,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:17:20,989 INFO 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 16:17:20,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:17:20,997 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:17:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:17:21,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:17:26,993 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 16:17:26,993 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:17:35,687 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 16:17:35,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:17:35,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100, 100] total 298 [2018-12-03 16:17:35,706 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:17:35,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 200 states [2018-12-03 16:17:35,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2018-12-03 16:17:35,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25098, Invalid=64004, Unknown=0, NotChecked=0, Total=89102 [2018-12-03 16:17:35,711 INFO L87 Difference]: Start difference. First operand 249 states and 298 transitions. Second operand 200 states. [2018-12-03 16:17:37,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:17:37,858 INFO L93 Difference]: Finished difference Result 260 states and 311 transitions. [2018-12-03 16:17:37,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-12-03 16:17:37,858 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 248 [2018-12-03 16:17:37,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:17:37,859 INFO L225 Difference]: With dead ends: 260 [2018-12-03 16:17:37,860 INFO L226 Difference]: Without dead ends: 258 [2018-12-03 16:17:37,861 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51940 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=25098, Invalid=64004, Unknown=0, NotChecked=0, Total=89102 [2018-12-03 16:17:37,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-12-03 16:17:37,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 254. [2018-12-03 16:17:37,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-12-03 16:17:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 304 transitions. [2018-12-03 16:17:37,869 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 304 transitions. Word has length 248 [2018-12-03 16:17:37,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:17:37,869 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 304 transitions. [2018-12-03 16:17:37,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 200 states. [2018-12-03 16:17:37,870 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 304 transitions. [2018-12-03 16:17:37,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-12-03 16:17:37,871 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:17:37,871 INFO L402 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1] [2018-12-03 16:17:37,871 INFO L423 AbstractCegarLoop]: === Iteration 52 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:17:37,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:17:37,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1380593056, now seen corresponding path program 50 times [2018-12-03 16:17:37,872 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:17:37,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:17:37,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:17:37,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:17:37,873 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:17:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:17:41,531 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 16:17:41,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:17:41,531 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:17:41,531 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:17:41,531 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:17:41,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:17:41,531 INFO 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 16:17:41,541 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:17:41,541 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:17:41,626 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-12-03 16:17:41,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:17:41,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:17:47,863 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 16:17:47,863 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:17:57,035 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 16:17:57,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:17:57,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 304 [2018-12-03 16:17:57,055 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:17:57,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 204 states [2018-12-03 16:17:57,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2018-12-03 16:17:57,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26109, Invalid=66611, Unknown=0, NotChecked=0, Total=92720 [2018-12-03 16:17:57,060 INFO L87 Difference]: Start difference. First operand 254 states and 304 transitions. Second operand 204 states. [2018-12-03 16:17:59,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:17:59,305 INFO L93 Difference]: Finished difference Result 265 states and 317 transitions. [2018-12-03 16:17:59,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-12-03 16:17:59,306 INFO L78 Accepts]: Start accepts. Automaton has 204 states. Word has length 253 [2018-12-03 16:17:59,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:17:59,307 INFO L225 Difference]: With dead ends: 265 [2018-12-03 16:17:59,307 INFO L226 Difference]: Without dead ends: 263 [2018-12-03 16:17:59,309 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54173 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=26109, Invalid=66611, Unknown=0, NotChecked=0, Total=92720 [2018-12-03 16:17:59,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-12-03 16:17:59,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 259. [2018-12-03 16:17:59,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-12-03 16:17:59,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 310 transitions. [2018-12-03 16:17:59,317 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 310 transitions. Word has length 253 [2018-12-03 16:17:59,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:17:59,317 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 310 transitions. [2018-12-03 16:17:59,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 204 states. [2018-12-03 16:17:59,317 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 310 transitions. [2018-12-03 16:17:59,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-12-03 16:17:59,319 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:17:59,319 INFO L402 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1] [2018-12-03 16:17:59,319 INFO L423 AbstractCegarLoop]: === Iteration 53 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:17:59,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:17:59,319 INFO L82 PathProgramCache]: Analyzing trace with hash 860466028, now seen corresponding path program 51 times [2018-12-03 16:17:59,319 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:17:59,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:17:59,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:17:59,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:17:59,320 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:17:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:18:02,922 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 16:18:02,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:18:02,922 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:18:02,923 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:18:02,923 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:18:02,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:18:02,923 INFO 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 16:18:02,965 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:18:02,965 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:18:03,021 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:18:03,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:18:03,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:18:09,733 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 16:18:09,734 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:18:18,764 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 16:18:18,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:18:18,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104, 104] total 310 [2018-12-03 16:18:18,783 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:18:18,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 208 states [2018-12-03 16:18:18,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 208 interpolants. [2018-12-03 16:18:18,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27130, Invalid=69280, Unknown=0, NotChecked=0, Total=96410 [2018-12-03 16:18:18,788 INFO L87 Difference]: Start difference. First operand 259 states and 310 transitions. Second operand 208 states. [2018-12-03 16:18:21,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:18:21,147 INFO L93 Difference]: Finished difference Result 270 states and 323 transitions. [2018-12-03 16:18:21,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-12-03 16:18:21,147 INFO L78 Accepts]: Start accepts. Automaton has 208 states. Word has length 258 [2018-12-03 16:18:21,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:18:21,148 INFO L225 Difference]: With dead ends: 270 [2018-12-03 16:18:21,148 INFO L226 Difference]: Without dead ends: 268 [2018-12-03 16:18:21,150 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56746 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=27130, Invalid=69280, Unknown=0, NotChecked=0, Total=96410 [2018-12-03 16:18:21,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-12-03 16:18:21,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2018-12-03 16:18:21,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-12-03 16:18:21,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 316 transitions. [2018-12-03 16:18:21,159 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 316 transitions. Word has length 258 [2018-12-03 16:18:21,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:18:21,159 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 316 transitions. [2018-12-03 16:18:21,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 208 states. [2018-12-03 16:18:21,159 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 316 transitions. [2018-12-03 16:18:21,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-12-03 16:18:21,161 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:18:21,161 INFO L402 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1] [2018-12-03 16:18:21,161 INFO L423 AbstractCegarLoop]: === Iteration 54 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:18:21,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:18:21,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1850762784, now seen corresponding path program 52 times [2018-12-03 16:18:21,161 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:18:21,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:18:21,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:18:21,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:18:21,162 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:18:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:18:25,135 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 16:18:25,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:18:25,136 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:18:25,136 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:18:25,136 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:18:25,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:18:25,136 INFO 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 16:18:25,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:18:25,145 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:18:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:18:25,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:18:31,956 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 16:18:31,956 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:18:41,482 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 16:18:41,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:18:41,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 316 [2018-12-03 16:18:41,501 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:18:41,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 212 states [2018-12-03 16:18:41,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2018-12-03 16:18:41,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28159, Invalid=72013, Unknown=0, NotChecked=0, Total=100172 [2018-12-03 16:18:41,507 INFO L87 Difference]: Start difference. First operand 264 states and 316 transitions. Second operand 212 states. [2018-12-03 16:18:44,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:18:44,016 INFO L93 Difference]: Finished difference Result 275 states and 329 transitions. [2018-12-03 16:18:44,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-12-03 16:18:44,016 INFO L78 Accepts]: Start accepts. Automaton has 212 states. Word has length 263 [2018-12-03 16:18:44,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:18:44,017 INFO L225 Difference]: With dead ends: 275 [2018-12-03 16:18:44,017 INFO L226 Difference]: Without dead ends: 273 [2018-12-03 16:18:44,020 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59374 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=28159, Invalid=72013, Unknown=0, NotChecked=0, Total=100172 [2018-12-03 16:18:44,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-12-03 16:18:44,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 269. [2018-12-03 16:18:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-12-03 16:18:44,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 322 transitions. [2018-12-03 16:18:44,026 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 322 transitions. Word has length 263 [2018-12-03 16:18:44,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:18:44,026 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 322 transitions. [2018-12-03 16:18:44,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 212 states. [2018-12-03 16:18:44,026 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 322 transitions. [2018-12-03 16:18:44,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-12-03 16:18:44,027 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:18:44,027 INFO L402 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1] [2018-12-03 16:18:44,028 INFO L423 AbstractCegarLoop]: === Iteration 55 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:18:44,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:18:44,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1371575276, now seen corresponding path program 53 times [2018-12-03 16:18:44,028 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:18:44,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:18:44,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:18:44,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:18:44,029 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:18:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:18:48,203 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 16:18:48,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:18:48,203 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:18:48,203 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:18:48,203 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:18:48,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:18:48,203 INFO 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 16:18:48,249 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:18:48,249 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:18:48,346 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-12-03 16:18:48,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:18:48,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:18:55,512 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 16:18:55,513 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:19:04,896 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 16:19:04,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:19:04,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108, 108] total 322 [2018-12-03 16:19:04,916 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:19:04,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 216 states [2018-12-03 16:19:04,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2018-12-03 16:19:04,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29196, Invalid=74810, Unknown=0, NotChecked=0, Total=104006 [2018-12-03 16:19:04,922 INFO L87 Difference]: Start difference. First operand 269 states and 322 transitions. Second operand 216 states. [2018-12-03 16:19:07,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:19:07,626 INFO L93 Difference]: Finished difference Result 280 states and 335 transitions. [2018-12-03 16:19:07,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-12-03 16:19:07,626 INFO L78 Accepts]: Start accepts. Automaton has 216 states. Word has length 268 [2018-12-03 16:19:07,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:19:07,628 INFO L225 Difference]: With dead ends: 280 [2018-12-03 16:19:07,628 INFO L226 Difference]: Without dead ends: 278 [2018-12-03 16:19:07,630 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62057 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=29196, Invalid=74810, Unknown=0, NotChecked=0, Total=104006 [2018-12-03 16:19:07,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-12-03 16:19:07,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 274. [2018-12-03 16:19:07,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-12-03 16:19:07,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 328 transitions. [2018-12-03 16:19:07,638 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 328 transitions. Word has length 268 [2018-12-03 16:19:07,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:19:07,638 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 328 transitions. [2018-12-03 16:19:07,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 216 states. [2018-12-03 16:19:07,638 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 328 transitions. [2018-12-03 16:19:07,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-12-03 16:19:07,639 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:19:07,640 INFO L402 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1] [2018-12-03 16:19:07,640 INFO L423 AbstractCegarLoop]: === Iteration 56 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:19:07,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:19:07,640 INFO L82 PathProgramCache]: Analyzing trace with hash -877264544, now seen corresponding path program 54 times [2018-12-03 16:19:07,640 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:19:07,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:19:07,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:19:07,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:19:07,641 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:19:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:19:11,914 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 16:19:11,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:19:11,914 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:19:11,914 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:19:11,915 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:19:11,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:19:11,915 INFO 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 16:19:11,924 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:19:11,925 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:19:11,984 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:19:11,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:19:11,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:19:19,288 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 16:19:19,288 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:19:29,178 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 16:19:29,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:19:29,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110, 110] total 328 [2018-12-03 16:19:29,197 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:19:29,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 220 states [2018-12-03 16:19:29,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 220 interpolants. [2018-12-03 16:19:29,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30241, Invalid=77671, Unknown=0, NotChecked=0, Total=107912 [2018-12-03 16:19:29,202 INFO L87 Difference]: Start difference. First operand 274 states and 328 transitions. Second operand 220 states. [2018-12-03 16:19:31,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:19:31,871 INFO L93 Difference]: Finished difference Result 285 states and 341 transitions. [2018-12-03 16:19:31,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-12-03 16:19:31,872 INFO L78 Accepts]: Start accepts. Automaton has 220 states. Word has length 273 [2018-12-03 16:19:31,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:19:31,873 INFO L225 Difference]: With dead ends: 285 [2018-12-03 16:19:31,873 INFO L226 Difference]: Without dead ends: 283 [2018-12-03 16:19:31,876 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64795 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=30241, Invalid=77671, Unknown=0, NotChecked=0, Total=107912 [2018-12-03 16:19:31,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-12-03 16:19:31,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 279. [2018-12-03 16:19:31,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-12-03 16:19:31,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 334 transitions. [2018-12-03 16:19:31,884 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 334 transitions. Word has length 273 [2018-12-03 16:19:31,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:19:31,884 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 334 transitions. [2018-12-03 16:19:31,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 220 states. [2018-12-03 16:19:31,884 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 334 transitions. [2018-12-03 16:19:31,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-12-03 16:19:31,886 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:19:31,886 INFO L402 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1] [2018-12-03 16:19:31,886 INFO L423 AbstractCegarLoop]: === Iteration 57 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:19:31,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:19:31,887 INFO L82 PathProgramCache]: Analyzing trace with hash 151968876, now seen corresponding path program 55 times [2018-12-03 16:19:31,887 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:19:31,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:19:31,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:19:31,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:19:31,888 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:19:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:19:36,238 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 16:19:36,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:19:36,239 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:19:36,239 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:19:36,239 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:19:36,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:19:36,239 INFO 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 16:19:36,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:19:36,248 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:19:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:19:36,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:19:43,712 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 16:19:43,712 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:19:53,847 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 16:19:53,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:19:53,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112, 112] total 334 [2018-12-03 16:19:53,868 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:19:53,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 224 states [2018-12-03 16:19:53,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2018-12-03 16:19:53,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31294, Invalid=80596, Unknown=0, NotChecked=0, Total=111890 [2018-12-03 16:19:53,872 INFO L87 Difference]: Start difference. First operand 279 states and 334 transitions. Second operand 224 states. [2018-12-03 16:19:56,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:19:56,775 INFO L93 Difference]: Finished difference Result 290 states and 347 transitions. [2018-12-03 16:19:56,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-12-03 16:19:56,775 INFO L78 Accepts]: Start accepts. Automaton has 224 states. Word has length 278 [2018-12-03 16:19:56,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:19:56,777 INFO L225 Difference]: With dead ends: 290 [2018-12-03 16:19:56,777 INFO L226 Difference]: Without dead ends: 288 [2018-12-03 16:19:56,778 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67588 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=31294, Invalid=80596, Unknown=0, NotChecked=0, Total=111890 [2018-12-03 16:19:56,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-12-03 16:19:56,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 284. [2018-12-03 16:19:56,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-12-03 16:19:56,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 340 transitions. [2018-12-03 16:19:56,784 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 340 transitions. Word has length 278 [2018-12-03 16:19:56,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:19:56,784 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 340 transitions. [2018-12-03 16:19:56,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 224 states. [2018-12-03 16:19:56,784 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 340 transitions. [2018-12-03 16:19:56,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-12-03 16:19:56,785 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:19:56,785 INFO L402 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1] [2018-12-03 16:19:56,786 INFO L423 AbstractCegarLoop]: === Iteration 58 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:19:56,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:19:56,786 INFO L82 PathProgramCache]: Analyzing trace with hash 746653920, now seen corresponding path program 56 times [2018-12-03 16:19:56,786 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:19:56,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:19:56,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:19:56,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:19:56,787 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:19:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:20:01,105 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 16:20:01,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:20:01,106 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:20:01,106 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:20:01,106 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:20:01,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:20:01,106 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 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 16:20:01,116 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:20:01,116 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:20:01,254 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-12-03 16:20:01,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:20:01,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:20:09,222 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 16:20:09,222 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:20:19,455 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 16:20:19,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:20:19,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114, 114] total 340 [2018-12-03 16:20:19,475 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:20:19,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 228 states [2018-12-03 16:20:19,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2018-12-03 16:20:19,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32355, Invalid=83585, Unknown=0, NotChecked=0, Total=115940 [2018-12-03 16:20:19,480 INFO L87 Difference]: Start difference. First operand 284 states and 340 transitions. Second operand 228 states. [2018-12-03 16:20:22,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:20:22,468 INFO L93 Difference]: Finished difference Result 295 states and 353 transitions. [2018-12-03 16:20:22,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-12-03 16:20:22,468 INFO L78 Accepts]: Start accepts. Automaton has 228 states. Word has length 283 [2018-12-03 16:20:22,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:20:22,469 INFO L225 Difference]: With dead ends: 295 [2018-12-03 16:20:22,469 INFO L226 Difference]: Without dead ends: 293 [2018-12-03 16:20:22,472 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70436 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=32355, Invalid=83585, Unknown=0, NotChecked=0, Total=115940 [2018-12-03 16:20:22,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-12-03 16:20:22,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 289. [2018-12-03 16:20:22,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-12-03 16:20:22,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 346 transitions. [2018-12-03 16:20:22,477 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 346 transitions. Word has length 283 [2018-12-03 16:20:22,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:20:22,477 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 346 transitions. [2018-12-03 16:20:22,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 228 states. [2018-12-03 16:20:22,477 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 346 transitions. [2018-12-03 16:20:22,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-12-03 16:20:22,478 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:20:22,478 INFO L402 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1] [2018-12-03 16:20:22,479 INFO L423 AbstractCegarLoop]: === Iteration 59 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:20:22,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:20:22,479 INFO L82 PathProgramCache]: Analyzing trace with hash 998016236, now seen corresponding path program 57 times [2018-12-03 16:20:22,479 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:20:22,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:20:22,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:20:22,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:20:22,480 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:20:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:20:27,496 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 16:20:27,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:20:27,496 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:20:27,497 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:20:27,497 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:20:27,497 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:20:27,497 INFO 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 16:20:27,507 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:20:27,507 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:20:27,604 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:20:27,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:20:27,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:20:35,412 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 16:20:35,412 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:20:45,803 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 16:20:45,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:20:45,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116, 116] total 346 [2018-12-03 16:20:45,823 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:20:45,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 232 states [2018-12-03 16:20:45,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 232 interpolants. [2018-12-03 16:20:45,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33424, Invalid=86638, Unknown=0, NotChecked=0, Total=120062 [2018-12-03 16:20:45,828 INFO L87 Difference]: Start difference. First operand 289 states and 346 transitions. Second operand 232 states. [2018-12-03 16:20:48,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:20:48,991 INFO L93 Difference]: Finished difference Result 300 states and 359 transitions. [2018-12-03 16:20:48,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-12-03 16:20:48,991 INFO L78 Accepts]: Start accepts. Automaton has 232 states. Word has length 288 [2018-12-03 16:20:48,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:20:48,992 INFO L225 Difference]: With dead ends: 300 [2018-12-03 16:20:48,992 INFO L226 Difference]: Without dead ends: 298 [2018-12-03 16:20:48,995 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 345 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73339 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=33424, Invalid=86638, Unknown=0, NotChecked=0, Total=120062 [2018-12-03 16:20:48,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-12-03 16:20:49,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2018-12-03 16:20:49,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-12-03 16:20:49,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 352 transitions. [2018-12-03 16:20:49,003 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 352 transitions. Word has length 288 [2018-12-03 16:20:49,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:20:49,003 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 352 transitions. [2018-12-03 16:20:49,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 232 states. [2018-12-03 16:20:49,003 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 352 transitions. [2018-12-03 16:20:49,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-12-03 16:20:49,004 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:20:49,005 INFO L402 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1] [2018-12-03 16:20:49,005 INFO L423 AbstractCegarLoop]: === Iteration 60 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:20:49,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:20:49,005 INFO L82 PathProgramCache]: Analyzing trace with hash -20402080, now seen corresponding path program 58 times [2018-12-03 16:20:49,005 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:20:49,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:20:49,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:20:49,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:20:49,006 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:20:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:20:53,923 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 16:20:53,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:20:53,923 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:20:53,923 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:20:53,923 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:20:53,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:20:53,924 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:20:53,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:20:53,935 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:20:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:20:54,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:21:02,097 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 16:21:02,097 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:21:12,573 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 16:21:12,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:21:12,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118, 118] total 352 [2018-12-03 16:21:12,593 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:21:12,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 236 states [2018-12-03 16:21:12,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 236 interpolants. [2018-12-03 16:21:12,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34501, Invalid=89755, Unknown=0, NotChecked=0, Total=124256 [2018-12-03 16:21:12,598 INFO L87 Difference]: Start difference. First operand 294 states and 352 transitions. Second operand 236 states. [2018-12-03 16:21:15,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:21:15,799 INFO L93 Difference]: Finished difference Result 305 states and 365 transitions. [2018-12-03 16:21:15,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-12-03 16:21:15,799 INFO L78 Accepts]: Start accepts. Automaton has 236 states. Word has length 293 [2018-12-03 16:21:15,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:21:15,800 INFO L225 Difference]: With dead ends: 305 [2018-12-03 16:21:15,800 INFO L226 Difference]: Without dead ends: 303 [2018-12-03 16:21:15,803 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 351 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76297 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=34501, Invalid=89755, Unknown=0, NotChecked=0, Total=124256 [2018-12-03 16:21:15,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-12-03 16:21:15,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 299. [2018-12-03 16:21:15,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-12-03 16:21:15,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 358 transitions. [2018-12-03 16:21:15,812 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 358 transitions. Word has length 293 [2018-12-03 16:21:15,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:21:15,812 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 358 transitions. [2018-12-03 16:21:15,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 236 states. [2018-12-03 16:21:15,812 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 358 transitions. [2018-12-03 16:21:15,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-12-03 16:21:15,813 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:21:15,814 INFO L402 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1] [2018-12-03 16:21:15,814 INFO L423 AbstractCegarLoop]: === Iteration 61 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:21:15,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:21:15,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1856926356, now seen corresponding path program 59 times [2018-12-03 16:21:15,814 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:21:15,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:21:15,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:21:15,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:21:15,815 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:21:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:21:20,780 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 16:21:20,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:21:20,780 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:21:20,780 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:21:20,780 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:21:20,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:21:20,781 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:21:20,788 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:21:20,789 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:21:20,916 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-12-03 16:21:20,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:21:20,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:21:29,651 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 16:21:29,651 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:21:40,577 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 16:21:40,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:21:40,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120, 120] total 358 [2018-12-03 16:21:40,597 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:21:40,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 240 states [2018-12-03 16:21:40,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 240 interpolants. [2018-12-03 16:21:40,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35586, Invalid=92936, Unknown=0, NotChecked=0, Total=128522 [2018-12-03 16:21:40,603 INFO L87 Difference]: Start difference. First operand 299 states and 358 transitions. Second operand 240 states. [2018-12-03 16:21:44,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:21:44,073 INFO L93 Difference]: Finished difference Result 310 states and 371 transitions. [2018-12-03 16:21:44,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-12-03 16:21:44,073 INFO L78 Accepts]: Start accepts. Automaton has 240 states. Word has length 298 [2018-12-03 16:21:44,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:21:44,075 INFO L225 Difference]: With dead ends: 310 [2018-12-03 16:21:44,075 INFO L226 Difference]: Without dead ends: 308 [2018-12-03 16:21:44,078 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 16:21:44,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-12-03 16:21:44,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 304. [2018-12-03 16:21:44,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-12-03 16:21:44,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 364 transitions. [2018-12-03 16:21:44,084 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 364 transitions. Word has length 298 [2018-12-03 16:21:44,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:21:44,084 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 364 transitions. [2018-12-03 16:21:44,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 240 states. [2018-12-03 16:21:44,084 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 364 transitions. [2018-12-03 16:21:44,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-12-03 16:21:44,085 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:21:44,085 INFO L402 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 1, 1, 1] [2018-12-03 16:21:44,086 INFO L423 AbstractCegarLoop]: === Iteration 62 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:21:44,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:21:44,086 INFO L82 PathProgramCache]: Analyzing trace with hash -2025523232, now seen corresponding path program 60 times [2018-12-03 16:21:44,086 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:21:44,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:21:44,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:21:44,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:21:44,087 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:21:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:21:49,330 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 16:21:49,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:21:49,331 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:21:49,331 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:21:49,331 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:21:49,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:21:49,331 INFO 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 16:21:49,340 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:21:49,341 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:21:49,409 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:21:49,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:21:49,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:21:58,000 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 16:21:58,001 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:22:09,107 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 16:22:09,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:22:09,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122, 122] total 364 [2018-12-03 16:22:09,127 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:22:09,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 244 states [2018-12-03 16:22:09,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 244 interpolants. [2018-12-03 16:22:09,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36679, Invalid=96181, Unknown=0, NotChecked=0, Total=132860 [2018-12-03 16:22:09,132 INFO L87 Difference]: Start difference. First operand 304 states and 364 transitions. Second operand 244 states. [2018-12-03 16:22:12,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:22:12,791 INFO L93 Difference]: Finished difference Result 315 states and 377 transitions. [2018-12-03 16:22:12,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-12-03 16:22:12,792 INFO L78 Accepts]: Start accepts. Automaton has 244 states. Word has length 303 [2018-12-03 16:22:12,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:22:12,793 INFO L225 Difference]: With dead ends: 315 [2018-12-03 16:22:12,793 INFO L226 Difference]: Without dead ends: 313 [2018-12-03 16:22:12,797 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 16:22:12,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-12-03 16:22:12,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 309. [2018-12-03 16:22:12,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-12-03 16:22:12,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 370 transitions. [2018-12-03 16:22:12,803 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 370 transitions. Word has length 303 [2018-12-03 16:22:12,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:22:12,803 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 370 transitions. [2018-12-03 16:22:12,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 244 states. [2018-12-03 16:22:12,803 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 370 transitions. [2018-12-03 16:22:12,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-12-03 16:22:12,804 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:22:12,804 INFO L402 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 1, 1, 1] [2018-12-03 16:22:12,804 INFO L423 AbstractCegarLoop]: === Iteration 63 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:22:12,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:22:12,805 INFO L82 PathProgramCache]: Analyzing trace with hash -120195604, now seen corresponding path program 61 times [2018-12-03 16:22:12,805 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:22:12,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:22:12,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:22:12,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:22:12,806 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:22:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:22:18,123 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 16:22:18,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:22:18,123 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:22:18,123 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:22:18,123 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:22:18,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:22:18,123 INFO 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 16:22:18,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:22:18,135 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:22:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:22:18,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:22:27,343 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 16:22:27,343 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:22:38,723 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 16:22:38,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:22:38,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124, 124] total 370 [2018-12-03 16:22:38,743 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:22:38,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 248 states [2018-12-03 16:22:38,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 248 interpolants. [2018-12-03 16:22:38,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37780, Invalid=99490, Unknown=0, NotChecked=0, Total=137270 [2018-12-03 16:22:38,748 INFO L87 Difference]: Start difference. First operand 309 states and 370 transitions. Second operand 248 states. [2018-12-03 16:22:42,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:22:42,314 INFO L93 Difference]: Finished difference Result 320 states and 383 transitions. [2018-12-03 16:22:42,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-12-03 16:22:42,314 INFO L78 Accepts]: Start accepts. Automaton has 248 states. Word has length 308 [2018-12-03 16:22:42,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:22:42,316 INFO L225 Difference]: With dead ends: 320 [2018-12-03 16:22:42,316 INFO L226 Difference]: Without dead ends: 318 [2018-12-03 16:22:42,318 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 16:22:42,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-12-03 16:22:42,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 314. [2018-12-03 16:22:42,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-12-03 16:22:42,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 376 transitions. [2018-12-03 16:22:42,327 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 376 transitions. Word has length 308 [2018-12-03 16:22:42,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:22:42,328 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 376 transitions. [2018-12-03 16:22:42,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 248 states. [2018-12-03 16:22:42,328 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 376 transitions. [2018-12-03 16:22:42,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-12-03 16:22:42,329 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:22:42,329 INFO L402 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1] [2018-12-03 16:22:42,330 INFO L423 AbstractCegarLoop]: === Iteration 64 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:22:42,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:22:42,330 INFO L82 PathProgramCache]: Analyzing trace with hash -2068979872, now seen corresponding path program 62 times [2018-12-03 16:22:42,330 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:22:42,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:22:42,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:22:42,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:22:42,331 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:22:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:22:47,843 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 16:22:47,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:22:47,844 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:22:47,844 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:22:47,844 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:22:47,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:22:47,844 INFO 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 16:22:47,853 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:22:47,853 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:22:47,971 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-12-03 16:22:47,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:22:47,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:22:57,459 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 16:22:57,460 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:23:08,821 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 16:23:08,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:23:08,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126, 126] total 376 [2018-12-03 16:23:08,840 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:23:08,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 252 states [2018-12-03 16:23:08,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 252 interpolants. [2018-12-03 16:23:08,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38889, Invalid=102863, Unknown=0, NotChecked=0, Total=141752 [2018-12-03 16:23:08,847 INFO L87 Difference]: Start difference. First operand 314 states and 376 transitions. Second operand 252 states. [2018-12-03 16:23:12,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:23:12,540 INFO L93 Difference]: Finished difference Result 325 states and 389 transitions. [2018-12-03 16:23:12,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-12-03 16:23:12,541 INFO L78 Accepts]: Start accepts. Automaton has 252 states. Word has length 313 [2018-12-03 16:23:12,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:23:12,542 INFO L225 Difference]: With dead ends: 325 [2018-12-03 16:23:12,542 INFO L226 Difference]: Without dead ends: 323 [2018-12-03 16:23:12,545 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 750 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 375 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88679 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=38889, Invalid=102863, Unknown=0, NotChecked=0, Total=141752 [2018-12-03 16:23:12,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-12-03 16:23:12,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 319. [2018-12-03 16:23:12,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-03 16:23:12,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 382 transitions. [2018-12-03 16:23:12,552 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 382 transitions. Word has length 313 [2018-12-03 16:23:12,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:23:12,553 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 382 transitions. [2018-12-03 16:23:12,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 252 states. [2018-12-03 16:23:12,553 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 382 transitions. [2018-12-03 16:23:12,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-12-03 16:23:12,554 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:23:12,555 INFO L402 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1] [2018-12-03 16:23:12,555 INFO L423 AbstractCegarLoop]: === Iteration 65 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:23:12,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:23:12,555 INFO L82 PathProgramCache]: Analyzing trace with hash 642891372, now seen corresponding path program 63 times [2018-12-03 16:23:12,555 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:23:12,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:23:12,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:23:12,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:23:12,556 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:23:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:23:18,190 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 16:23:18,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:23:18,190 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:23:18,191 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:23:18,191 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:23:18,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:23:18,191 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 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 16:23:18,201 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:23:18,202 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:23:18,272 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:23:18,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:23:18,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:23:28,160 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 16:23:28,161 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:23:39,820 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 16:23:39,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:23:39,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128, 128] total 382 [2018-12-03 16:23:39,882 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:23:39,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 256 states [2018-12-03 16:23:39,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 256 interpolants. [2018-12-03 16:23:39,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40006, Invalid=106300, Unknown=0, NotChecked=0, Total=146306 [2018-12-03 16:23:39,888 INFO L87 Difference]: Start difference. First operand 319 states and 382 transitions. Second operand 256 states. [2018-12-03 16:23:43,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:23:43,921 INFO L93 Difference]: Finished difference Result 330 states and 395 transitions. [2018-12-03 16:23:43,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-12-03 16:23:43,922 INFO L78 Accepts]: Start accepts. Automaton has 256 states. Word has length 318 [2018-12-03 16:23:43,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:23:43,923 INFO L225 Difference]: With dead ends: 330 [2018-12-03 16:23:43,923 INFO L226 Difference]: Without dead ends: 328 [2018-12-03 16:23:43,925 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91912 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=40006, Invalid=106300, Unknown=0, NotChecked=0, Total=146306 [2018-12-03 16:23:43,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-12-03 16:23:43,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2018-12-03 16:23:43,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2018-12-03 16:23:43,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 388 transitions. [2018-12-03 16:23:43,932 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 388 transitions. Word has length 318 [2018-12-03 16:23:43,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:23:43,932 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 388 transitions. [2018-12-03 16:23:43,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 256 states. [2018-12-03 16:23:43,932 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 388 transitions. [2018-12-03 16:23:43,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2018-12-03 16:23:43,933 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:23:43,933 INFO L402 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 1, 1, 1] [2018-12-03 16:23:43,934 INFO L423 AbstractCegarLoop]: === Iteration 66 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:23:43,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:23:43,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1346672928, now seen corresponding path program 64 times [2018-12-03 16:23:43,934 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:23:43,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:23:43,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:23:43,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:23:43,935 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:23:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:23:49,781 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 16:23:49,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:23:49,782 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:23:49,782 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:23:49,782 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:23:49,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:23:49,782 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:23:49,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:23:49,792 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:23:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:23:49,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:24:00,031 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 16:24:00,031 INFO L316 TraceCheckSpWp]: Computing backward predicates...