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/RailwayCrossing.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 16:11:08,382 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 16:11:08,384 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 16:11:08,401 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 16:11:08,401 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 16:11:08,402 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 16:11:08,403 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 16:11:08,405 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 16:11:08,407 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 16:11:08,408 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 16:11:08,411 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-12-03 16:11:08,443 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 16:11:08,469 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 16:11:08,471 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 16:11:08,472 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 16:11:08,472 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 16:11:08,473 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 16:11:08,473 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 16:11:08,473 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 16:11:08,474 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 16:11:08,474 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 16:11:08,474 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 16:11:08,474 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 16:11:08,474 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 16:11:08,474 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 16:11:08,475 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 16:11:08,475 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 16:11:08,475 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 16:11:08,477 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 16:11:08,477 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 16:11:08,478 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 16:11:08,478 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 16:11:08,478 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 16:11:08,478 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 16:11:08,478 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 16:11:08,478 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 16:11:08,480 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 16:11:08,480 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 16:11:08,480 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 16:11:08,481 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 16:11:08,481 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 16:11:08,481 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 16:11:08,481 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 16:11:08,481 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 16:11:08,482 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 16:11:08,482 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 16:11:08,482 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 16:11:08,482 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 16:11:08,482 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 16:11:08,482 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 16:11:08,483 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 16:11:08,483 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 16:11:08,483 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 16:11:08,518 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 16:11:08,531 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 16:11:08,535 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 16:11:08,537 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 16:11:08,537 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 16:11:08,538 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/RailwayCrossing.bpl [2018-12-03 16:11:08,538 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/RailwayCrossing.bpl' [2018-12-03 16:11:08,573 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 16:11:08,575 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 16:11:08,576 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 16:11:08,576 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 16:11:08,576 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 16:11:08,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:11:08" (1/1) ... [2018-12-03 16:11:08,605 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:11:08" (1/1) ... [2018-12-03 16:11:08,611 WARN L165 Inliner]: Program contained no entry procedure! [2018-12-03 16:11:08,611 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-12-03 16:11:08,611 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-12-03 16:11:08,614 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 16:11:08,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 16:11:08,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 16:11:08,615 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 16:11:08,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:11:08" (1/1) ... [2018-12-03 16:11:08,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:11:08" (1/1) ... [2018-12-03 16:11:08,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:11:08" (1/1) ... [2018-12-03 16:11:08,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:11:08" (1/1) ... [2018-12-03 16:11:08,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:11:08" (1/1) ... [2018-12-03 16:11:08,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:11:08" (1/1) ... [2018-12-03 16:11:08,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:11:08" (1/1) ... [2018-12-03 16:11:08,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 16:11:08,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 16:11:08,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 16:11:08,640 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 16:11:08,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "RailwayCrossing.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 16:11:08,715 INFO L124 BoogieDeclarations]: Specification and implementation of procedure GateController given in one single declaration [2018-12-03 16:11:08,716 INFO L130 BoogieDeclarations]: Found specification of procedure GateController [2018-12-03 16:11:08,716 INFO L138 BoogieDeclarations]: Found implementation of procedure GateController [2018-12-03 16:11:09,009 INFO L272 CfgBuilder]: Using library mode [2018-12-03 16:11:09,009 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-03 16:11:09,009 INFO L202 PluginConnector]: Adding new model RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 04:11:09 BoogieIcfgContainer [2018-12-03 16:11:09,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 16:11:09,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 16:11:09,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 16:11:09,014 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 16:11:09,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:11:08" (1/2) ... [2018-12-03 16:11:09,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69136f42 and model type RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 04:11:09, skipping insertion in model container [2018-12-03 16:11:09,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 04:11:09" (2/2) ... [2018-12-03 16:11:09,018 INFO L112 eAbstractionObserver]: Analyzing ICFG RailwayCrossing.bpl [2018-12-03 16:11:09,030 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 16:11:09,040 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 16:11:09,060 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 16:11:09,094 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 16:11:09,094 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 16:11:09,094 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 16:11:09,094 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 16:11:09,095 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 16:11:09,095 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 16:11:09,095 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 16:11:09,095 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 16:11:09,109 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-12-03 16:11:09,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-03 16:11:09,116 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:09,117 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-03 16:11:09,119 INFO L423 AbstractCegarLoop]: === Iteration 1 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:09,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:09,125 INFO L82 PathProgramCache]: Analyzing trace with hash 30496, now seen corresponding path program 1 times [2018-12-03 16:11:09,127 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:09,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:09,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:09,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:09,179 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:09,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:09,293 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 16:11:09,296 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 16:11:09,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 16:11:09,297 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 16:11:09,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 16:11:09,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 16:11:09,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 16:11:09,339 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-12-03 16:11:09,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:09,433 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-12-03 16:11:09,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 16:11:09,435 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-03 16:11:09,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:09,446 INFO L225 Difference]: With dead ends: 19 [2018-12-03 16:11:09,446 INFO L226 Difference]: Without dead ends: 13 [2018-12-03 16:11:09,450 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 16:11:09,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-03 16:11:09,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 9. [2018-12-03 16:11:09,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-03 16:11:09,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2018-12-03 16:11:09,487 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 3 [2018-12-03 16:11:09,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:09,488 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 12 transitions. [2018-12-03 16:11:09,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 16:11:09,488 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2018-12-03 16:11:09,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-03 16:11:09,489 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:09,489 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-03 16:11:09,489 INFO L423 AbstractCegarLoop]: === Iteration 2 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:09,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:09,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1863215691, now seen corresponding path program 1 times [2018-12-03 16:11:09,490 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:09,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:09,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:09,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:09,491 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:09,557 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 16:11:09,558 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 16:11:09,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 16:11:09,558 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 16:11:09,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 16:11:09,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 16:11:09,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 16:11:09,561 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand 3 states. [2018-12-03 16:11:09,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:09,598 INFO L93 Difference]: Finished difference Result 16 states and 22 transitions. [2018-12-03 16:11:09,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 16:11:09,599 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-12-03 16:11:09,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:09,600 INFO L225 Difference]: With dead ends: 16 [2018-12-03 16:11:09,600 INFO L226 Difference]: Without dead ends: 9 [2018-12-03 16:11:09,601 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 16:11:09,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-12-03 16:11:09,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-12-03 16:11:09,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-03 16:11:09,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2018-12-03 16:11:09,604 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2018-12-03 16:11:09,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:09,605 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2018-12-03 16:11:09,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 16:11:09,605 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2018-12-03 16:11:09,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-03 16:11:09,606 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:09,606 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 16:11:09,606 INFO L423 AbstractCegarLoop]: === Iteration 3 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:09,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:09,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1926837521, now seen corresponding path program 1 times [2018-12-03 16:11:09,607 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:09,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:09,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:09,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:09,609 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:09,798 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 16:11:09,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:09,798 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:09,800 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 9 with the following transitions: [2018-12-03 16:11:09,802 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [13], [16], [20], [22], [23] [2018-12-03 16:11:09,851 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 16:11:09,852 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 16:11:10,089 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 16:11:10,091 INFO L272 AbstractInterpreter]: Visited 8 different actions 27 times. Merged at 7 different actions 18 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-03 16:11:10,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:10,107 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 16:11:10,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:10,108 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:11:10,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:10,118 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:11:10,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:10,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:10,302 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 16:11:10,302 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:10,370 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 16:11:10,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:10,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2018-12-03 16:11:10,390 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:10,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-03 16:11:10,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-03 16:11:10,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2018-12-03 16:11:10,392 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 6 states. [2018-12-03 16:11:10,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:10,486 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2018-12-03 16:11:10,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 16:11:10,487 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2018-12-03 16:11:10,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:10,488 INFO L225 Difference]: With dead ends: 20 [2018-12-03 16:11:10,488 INFO L226 Difference]: Without dead ends: 18 [2018-12-03 16:11:10,489 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2018-12-03 16:11:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-12-03 16:11:10,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2018-12-03 16:11:10,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-03 16:11:10,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2018-12-03 16:11:10,494 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2018-12-03 16:11:10,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:10,495 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2018-12-03 16:11:10,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-03 16:11:10,495 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2018-12-03 16:11:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-03 16:11:10,496 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:10,496 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1] [2018-12-03 16:11:10,497 INFO L423 AbstractCegarLoop]: === Iteration 4 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:10,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:10,497 INFO L82 PathProgramCache]: Analyzing trace with hash 640583104, now seen corresponding path program 2 times [2018-12-03 16:11:10,497 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:10,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:10,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:10,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:10,499 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:10,694 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 16:11:10,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:10,694 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:10,697 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:10,697 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:10,697 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:10,697 INFO 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 16:11:10,715 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:11:10,716 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:11:10,740 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-03 16:11:10,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:10,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:11,068 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 16:11:11,068 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:11,136 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 16:11:11,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:11,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2018-12-03 16:11:11,155 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:11,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 16:11:11,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 16:11:11,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2018-12-03 16:11:11,157 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand 8 states. [2018-12-03 16:11:11,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:11,208 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2018-12-03 16:11:11,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 16:11:11,209 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-12-03 16:11:11,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:11,210 INFO L225 Difference]: With dead ends: 25 [2018-12-03 16:11:11,210 INFO L226 Difference]: Without dead ends: 23 [2018-12-03 16:11:11,211 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2018-12-03 16:11:11,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-03 16:11:11,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-12-03 16:11:11,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-03 16:11:11,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2018-12-03 16:11:11,217 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 13 [2018-12-03 16:11:11,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:11,217 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-12-03 16:11:11,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 16:11:11,217 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2018-12-03 16:11:11,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-03 16:11:11,218 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:11,218 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1] [2018-12-03 16:11:11,218 INFO L423 AbstractCegarLoop]: === Iteration 5 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:11,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:11,219 INFO L82 PathProgramCache]: Analyzing trace with hash -297055631, now seen corresponding path program 3 times [2018-12-03 16:11:11,219 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:11,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:11,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:11,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:11,220 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:11,347 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 16:11:11,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:11,348 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:11,348 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:11,348 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:11,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:11,349 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:11:11,365 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:11:11,366 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:11:11,404 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:11:11,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:11,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:11,614 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 16:11:11,615 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:11,722 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 16:11:11,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:11,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2018-12-03 16:11:11,742 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:11,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-03 16:11:11,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-03 16:11:11,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=97, Unknown=0, NotChecked=0, Total=182 [2018-12-03 16:11:11,743 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 10 states. [2018-12-03 16:11:11,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:11,788 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2018-12-03 16:11:11,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-03 16:11:11,789 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-12-03 16:11:11,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:11,790 INFO L225 Difference]: With dead ends: 30 [2018-12-03 16:11:11,790 INFO L226 Difference]: Without dead ends: 28 [2018-12-03 16:11:11,791 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=97, Unknown=0, NotChecked=0, Total=182 [2018-12-03 16:11:11,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-03 16:11:11,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2018-12-03 16:11:11,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-03 16:11:11,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2018-12-03 16:11:11,797 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 18 [2018-12-03 16:11:11,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:11,798 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2018-12-03 16:11:11,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-03 16:11:11,798 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2018-12-03 16:11:11,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-03 16:11:11,799 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:11,799 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1] [2018-12-03 16:11:11,799 INFO L423 AbstractCegarLoop]: === Iteration 6 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:11,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:11,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2073218144, now seen corresponding path program 4 times [2018-12-03 16:11:11,800 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:11,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:11,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:11,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:11,802 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:11,958 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 16:11:11,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:11,958 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:11,959 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:11,960 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:11,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:11,960 INFO 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 16:11:11,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:11,986 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:11:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:12,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:12,517 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 16:11:12,517 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:12,629 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 16:11:12,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:12,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2018-12-03 16:11:12,652 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:12,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-03 16:11:12,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-03 16:11:12,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2018-12-03 16:11:12,653 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 12 states. [2018-12-03 16:11:12,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:12,921 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2018-12-03 16:11:12,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-03 16:11:12,922 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-12-03 16:11:12,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:12,923 INFO L225 Difference]: With dead ends: 35 [2018-12-03 16:11:12,923 INFO L226 Difference]: Without dead ends: 33 [2018-12-03 16:11:12,926 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2018-12-03 16:11:12,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-03 16:11:12,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2018-12-03 16:11:12,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-03 16:11:12,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2018-12-03 16:11:12,937 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 23 [2018-12-03 16:11:12,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:12,938 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2018-12-03 16:11:12,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-03 16:11:12,939 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2018-12-03 16:11:12,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-03 16:11:12,940 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:12,940 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1] [2018-12-03 16:11:12,940 INFO L423 AbstractCegarLoop]: === Iteration 7 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:12,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:12,941 INFO L82 PathProgramCache]: Analyzing trace with hash -609605679, now seen corresponding path program 5 times [2018-12-03 16:11:12,941 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:12,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:12,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:12,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:12,942 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:13,128 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 16:11:13,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:13,128 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:13,128 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:13,129 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:13,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:13,129 INFO 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 16:11:13,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:11:13,138 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:11:13,154 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-03 16:11:13,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:13,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:13,660 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 16:11:13,660 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:14,001 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 16:11:14,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:14,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2018-12-03 16:11:14,033 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:14,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-03 16:11:14,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-03 16:11:14,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=205, Unknown=0, NotChecked=0, Total=380 [2018-12-03 16:11:14,034 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand 14 states. [2018-12-03 16:11:14,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:14,140 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2018-12-03 16:11:14,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-03 16:11:14,142 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2018-12-03 16:11:14,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:14,143 INFO L225 Difference]: With dead ends: 40 [2018-12-03 16:11:14,146 INFO L226 Difference]: Without dead ends: 38 [2018-12-03 16:11:14,147 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=175, Invalid=205, Unknown=0, NotChecked=0, Total=380 [2018-12-03 16:11:14,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-03 16:11:14,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2018-12-03 16:11:14,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-03 16:11:14,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2018-12-03 16:11:14,155 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 28 [2018-12-03 16:11:14,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:14,155 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2018-12-03 16:11:14,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-03 16:11:14,155 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2018-12-03 16:11:14,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-03 16:11:14,156 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:14,157 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1] [2018-12-03 16:11:14,157 INFO L423 AbstractCegarLoop]: === Iteration 8 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:14,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:14,157 INFO L82 PathProgramCache]: Analyzing trace with hash -70825216, now seen corresponding path program 6 times [2018-12-03 16:11:14,158 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:14,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:14,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:14,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:14,159 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:14,405 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 16:11:14,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:14,406 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:14,406 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:14,406 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:14,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:14,407 INFO 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 16:11:14,427 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:11:14,427 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:11:14,448 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:11:14,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:14,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:15,076 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 16:11:15,076 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:15,205 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 16:11:15,224 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:15,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2018-12-03 16:11:15,225 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:15,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-03 16:11:15,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-03 16:11:15,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=274, Unknown=0, NotChecked=0, Total=506 [2018-12-03 16:11:15,226 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand 16 states. [2018-12-03 16:11:15,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:15,291 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2018-12-03 16:11:15,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-03 16:11:15,292 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2018-12-03 16:11:15,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:15,293 INFO L225 Difference]: With dead ends: 45 [2018-12-03 16:11:15,293 INFO L226 Difference]: Without dead ends: 43 [2018-12-03 16:11:15,294 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=232, Invalid=274, Unknown=0, NotChecked=0, Total=506 [2018-12-03 16:11:15,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-03 16:11:15,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-12-03 16:11:15,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-03 16:11:15,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2018-12-03 16:11:15,302 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 33 [2018-12-03 16:11:15,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:15,302 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2018-12-03 16:11:15,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-03 16:11:15,302 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2018-12-03 16:11:15,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-03 16:11:15,303 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:15,304 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1] [2018-12-03 16:11:15,304 INFO L423 AbstractCegarLoop]: === Iteration 9 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:15,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:15,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1872481585, now seen corresponding path program 7 times [2018-12-03 16:11:15,304 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:15,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:15,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:15,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:15,306 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:15,506 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 16:11:15,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:15,507 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:15,507 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:15,507 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:15,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:15,507 INFO 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 16:11:15,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:15,516 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:11:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:15,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:15,835 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 16:11:15,835 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:16,089 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 16:11:16,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:16,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2018-12-03 16:11:16,110 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:16,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-03 16:11:16,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-03 16:11:16,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=353, Unknown=0, NotChecked=0, Total=650 [2018-12-03 16:11:16,111 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 18 states. [2018-12-03 16:11:16,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:16,181 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2018-12-03 16:11:16,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-03 16:11:16,182 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2018-12-03 16:11:16,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:16,183 INFO L225 Difference]: With dead ends: 50 [2018-12-03 16:11:16,184 INFO L226 Difference]: Without dead ends: 48 [2018-12-03 16:11:16,185 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=297, Invalid=353, Unknown=0, NotChecked=0, Total=650 [2018-12-03 16:11:16,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-03 16:11:16,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2018-12-03 16:11:16,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-03 16:11:16,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-12-03 16:11:16,191 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 38 [2018-12-03 16:11:16,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:16,192 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-12-03 16:11:16,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-03 16:11:16,192 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-12-03 16:11:16,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-03 16:11:16,193 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:16,193 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1] [2018-12-03 16:11:16,193 INFO L423 AbstractCegarLoop]: === Iteration 10 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:16,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:16,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1776681376, now seen corresponding path program 8 times [2018-12-03 16:11:16,194 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:16,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:16,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:16,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:16,195 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:16,347 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 16:11:16,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:16,347 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:16,347 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:16,348 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:16,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:16,348 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:11:16,358 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:11:16,358 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:11:16,381 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-03 16:11:16,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:16,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:16,612 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 16:11:16,613 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:16,877 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 16:11:16,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:16,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2018-12-03 16:11:16,897 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:16,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-03 16:11:16,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-03 16:11:16,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=442, Unknown=0, NotChecked=0, Total=812 [2018-12-03 16:11:16,900 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 20 states. [2018-12-03 16:11:16,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:16,987 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2018-12-03 16:11:16,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-03 16:11:16,988 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2018-12-03 16:11:16,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:16,989 INFO L225 Difference]: With dead ends: 55 [2018-12-03 16:11:16,989 INFO L226 Difference]: Without dead ends: 53 [2018-12-03 16:11:16,990 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=442, Unknown=0, NotChecked=0, Total=812 [2018-12-03 16:11:16,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-03 16:11:16,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2018-12-03 16:11:16,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-03 16:11:16,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2018-12-03 16:11:16,998 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 43 [2018-12-03 16:11:16,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:16,998 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2018-12-03 16:11:16,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-03 16:11:16,998 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2018-12-03 16:11:16,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-12-03 16:11:17,000 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:17,000 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1] [2018-12-03 16:11:17,000 INFO L423 AbstractCegarLoop]: === Iteration 11 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:17,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:17,000 INFO L82 PathProgramCache]: Analyzing trace with hash -951698799, now seen corresponding path program 9 times [2018-12-03 16:11:17,001 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:17,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:17,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:17,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:17,002 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:17,322 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 16:11:17,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:17,323 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:17,323 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:17,323 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:17,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:17,323 INFO 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 16:11:17,334 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:11:17,334 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:11:17,354 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:11:17,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:17,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:18,780 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 16:11:18,781 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:19,136 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 16:11:19,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:19,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2018-12-03 16:11:19,157 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:19,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-03 16:11:19,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-03 16:11:19,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=541, Unknown=0, NotChecked=0, Total=992 [2018-12-03 16:11:19,159 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand 22 states. [2018-12-03 16:11:19,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:19,280 INFO L93 Difference]: Finished difference Result 60 states and 82 transitions. [2018-12-03 16:11:19,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-03 16:11:19,281 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2018-12-03 16:11:19,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:19,282 INFO L225 Difference]: With dead ends: 60 [2018-12-03 16:11:19,282 INFO L226 Difference]: Without dead ends: 58 [2018-12-03 16:11:19,283 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=451, Invalid=541, Unknown=0, NotChecked=0, Total=992 [2018-12-03 16:11:19,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-03 16:11:19,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2018-12-03 16:11:19,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-12-03 16:11:19,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2018-12-03 16:11:19,290 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 48 [2018-12-03 16:11:19,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:19,290 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2018-12-03 16:11:19,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-03 16:11:19,290 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2018-12-03 16:11:19,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-03 16:11:19,292 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:19,292 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1] [2018-12-03 16:11:19,292 INFO L423 AbstractCegarLoop]: === Iteration 12 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:19,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:19,292 INFO L82 PathProgramCache]: Analyzing trace with hash -259461056, now seen corresponding path program 10 times [2018-12-03 16:11:19,293 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:19,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:19,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:19,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:19,294 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:19,537 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 16:11:19,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:19,537 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:19,538 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:19,538 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:19,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:19,538 INFO 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 16:11:19,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:19,552 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:11:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:19,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:19,936 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 16:11:19,936 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:20,290 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 16:11:20,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:20,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2018-12-03 16:11:20,310 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:20,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-03 16:11:20,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-03 16:11:20,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=650, Unknown=0, NotChecked=0, Total=1190 [2018-12-03 16:11:20,312 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 24 states. [2018-12-03 16:11:20,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:20,487 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2018-12-03 16:11:20,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-03 16:11:20,488 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2018-12-03 16:11:20,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:20,489 INFO L225 Difference]: With dead ends: 65 [2018-12-03 16:11:20,489 INFO L226 Difference]: Without dead ends: 63 [2018-12-03 16:11:20,489 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=540, Invalid=650, Unknown=0, NotChecked=0, Total=1190 [2018-12-03 16:11:20,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-03 16:11:20,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-12-03 16:11:20,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-03 16:11:20,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2018-12-03 16:11:20,495 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 53 [2018-12-03 16:11:20,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:20,495 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2018-12-03 16:11:20,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-03 16:11:20,496 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2018-12-03 16:11:20,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-12-03 16:11:20,497 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:20,497 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1] [2018-12-03 16:11:20,497 INFO L423 AbstractCegarLoop]: === Iteration 13 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:20,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:20,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1213165553, now seen corresponding path program 11 times [2018-12-03 16:11:20,497 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:20,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:20,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:20,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:20,499 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:20,712 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 16:11:20,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:20,713 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:20,713 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:20,713 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:20,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:20,713 INFO 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 16:11:20,722 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:11:20,723 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:11:20,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-12-03 16:11:20,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:20,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:21,205 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 16:11:21,205 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:11:21,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:21,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2018-12-03 16:11:21,545 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:21,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-12-03 16:11:21,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-12-03 16:11:21,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=769, Unknown=0, NotChecked=0, Total=1406 [2018-12-03 16:11:21,546 INFO L87 Difference]: Start difference. First operand 59 states and 81 transitions. Second operand 26 states. [2018-12-03 16:11:21,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:21,665 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2018-12-03 16:11:21,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-03 16:11:21,666 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2018-12-03 16:11:21,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:21,666 INFO L225 Difference]: With dead ends: 70 [2018-12-03 16:11:21,667 INFO L226 Difference]: Without dead ends: 68 [2018-12-03 16:11:21,667 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=637, Invalid=769, Unknown=0, NotChecked=0, Total=1406 [2018-12-03 16:11:21,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-03 16:11:21,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2018-12-03 16:11:21,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-03 16:11:21,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2018-12-03 16:11:21,674 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 58 [2018-12-03 16:11:21,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:21,674 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 88 transitions. [2018-12-03 16:11:21,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-12-03 16:11:21,675 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 88 transitions. [2018-12-03 16:11:21,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-03 16:11:21,676 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:21,676 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1] [2018-12-03 16:11:21,676 INFO L423 AbstractCegarLoop]: === Iteration 14 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:21,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:21,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1043720480, now seen corresponding path program 12 times [2018-12-03 16:11:21,677 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:21,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:21,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:21,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:21,678 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:21,869 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 16:11:21,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:21,870 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:21,870 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:21,870 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:21,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:21,870 INFO 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 16:11:21,881 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:11:21,882 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:11:21,924 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:11:21,924 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:21,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:22,308 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 16:11:22,308 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:22,608 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 16:11:22,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:22,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2018-12-03 16:11:22,627 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:22,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-12-03 16:11:22,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-12-03 16:11:22,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=742, Invalid=898, Unknown=0, NotChecked=0, Total=1640 [2018-12-03 16:11:22,629 INFO L87 Difference]: Start difference. First operand 64 states and 88 transitions. Second operand 28 states. [2018-12-03 16:11:22,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:22,753 INFO L93 Difference]: Finished difference Result 75 states and 103 transitions. [2018-12-03 16:11:22,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-03 16:11:22,753 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2018-12-03 16:11:22,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:22,754 INFO L225 Difference]: With dead ends: 75 [2018-12-03 16:11:22,754 INFO L226 Difference]: Without dead ends: 73 [2018-12-03 16:11:22,755 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=742, Invalid=898, Unknown=0, NotChecked=0, Total=1640 [2018-12-03 16:11:22,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-12-03 16:11:22,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2018-12-03 16:11:22,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-12-03 16:11:22,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 95 transitions. [2018-12-03 16:11:22,761 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 95 transitions. Word has length 63 [2018-12-03 16:11:22,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:22,762 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 95 transitions. [2018-12-03 16:11:22,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-12-03 16:11:22,762 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 95 transitions. [2018-12-03 16:11:22,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-12-03 16:11:22,763 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:22,763 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1] [2018-12-03 16:11:22,763 INFO L423 AbstractCegarLoop]: === Iteration 15 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:22,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:22,764 INFO L82 PathProgramCache]: Analyzing trace with hash 14511441, now seen corresponding path program 13 times [2018-12-03 16:11:22,764 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:22,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:22,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:22,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:22,765 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:23,379 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 16:11:23,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:23,380 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:23,380 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:23,380 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:23,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:23,380 INFO 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 16:11:23,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:23,391 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:11:23,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:23,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:23,846 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 16:11:23,846 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:24,751 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 16:11:24,770 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:24,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2018-12-03 16:11:24,770 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:24,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-12-03 16:11:24,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-12-03 16:11:24,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=855, Invalid=1037, Unknown=0, NotChecked=0, Total=1892 [2018-12-03 16:11:24,773 INFO L87 Difference]: Start difference. First operand 69 states and 95 transitions. Second operand 30 states. [2018-12-03 16:11:24,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:24,901 INFO L93 Difference]: Finished difference Result 80 states and 110 transitions. [2018-12-03 16:11:24,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-03 16:11:24,902 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2018-12-03 16:11:24,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:24,903 INFO L225 Difference]: With dead ends: 80 [2018-12-03 16:11:24,903 INFO L226 Difference]: Without dead ends: 78 [2018-12-03 16:11:24,904 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=855, Invalid=1037, Unknown=0, NotChecked=0, Total=1892 [2018-12-03 16:11:24,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-12-03 16:11:24,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2018-12-03 16:11:24,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-12-03 16:11:24,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 102 transitions. [2018-12-03 16:11:24,910 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 102 transitions. Word has length 68 [2018-12-03 16:11:24,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:24,910 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 102 transitions. [2018-12-03 16:11:24,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-12-03 16:11:24,911 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 102 transitions. [2018-12-03 16:11:24,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-03 16:11:24,912 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:24,912 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1] [2018-12-03 16:11:24,912 INFO L423 AbstractCegarLoop]: === Iteration 16 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:24,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:24,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1220315776, now seen corresponding path program 14 times [2018-12-03 16:11:24,913 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:24,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:24,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:24,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:24,914 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:25,377 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 16:11:25,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:25,377 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:25,377 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:25,377 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:25,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:25,378 INFO 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 16:11:25,395 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:11:25,395 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:11:25,483 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-12-03 16:11:25,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:25,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:25,864 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 16:11:25,864 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:26,204 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 16:11:26,224 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:26,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2018-12-03 16:11:26,225 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:26,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-12-03 16:11:26,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-12-03 16:11:26,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=976, Invalid=1186, Unknown=0, NotChecked=0, Total=2162 [2018-12-03 16:11:26,227 INFO L87 Difference]: Start difference. First operand 74 states and 102 transitions. Second operand 32 states. [2018-12-03 16:11:26,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:26,388 INFO L93 Difference]: Finished difference Result 85 states and 117 transitions. [2018-12-03 16:11:26,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-03 16:11:26,389 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 73 [2018-12-03 16:11:26,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:26,390 INFO L225 Difference]: With dead ends: 85 [2018-12-03 16:11:26,390 INFO L226 Difference]: Without dead ends: 83 [2018-12-03 16:11:26,391 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=976, Invalid=1186, Unknown=0, NotChecked=0, Total=2162 [2018-12-03 16:11:26,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-12-03 16:11:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-12-03 16:11:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-12-03 16:11:26,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2018-12-03 16:11:26,399 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 73 [2018-12-03 16:11:26,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:26,399 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2018-12-03 16:11:26,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-12-03 16:11:26,400 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2018-12-03 16:11:26,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-12-03 16:11:26,400 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:26,401 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1] [2018-12-03 16:11:26,401 INFO L423 AbstractCegarLoop]: === Iteration 17 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:26,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:26,401 INFO L82 PathProgramCache]: Analyzing trace with hash 127283889, now seen corresponding path program 15 times [2018-12-03 16:11:26,402 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:26,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:26,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:26,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:26,403 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:27,427 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 16:11:27,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:27,428 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:27,428 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:27,428 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:27,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:27,429 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:11:27,437 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:11:27,438 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:11:27,487 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:11:27,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:27,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:27,993 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 16:11:27,993 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:28,540 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 16:11:28,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:28,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2018-12-03 16:11:28,561 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:28,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-12-03 16:11:28,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-12-03 16:11:28,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1105, Invalid=1345, Unknown=0, NotChecked=0, Total=2450 [2018-12-03 16:11:28,564 INFO L87 Difference]: Start difference. First operand 79 states and 109 transitions. Second operand 34 states. [2018-12-03 16:11:28,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:28,768 INFO L93 Difference]: Finished difference Result 90 states and 124 transitions. [2018-12-03 16:11:28,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-03 16:11:28,768 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2018-12-03 16:11:28,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:28,769 INFO L225 Difference]: With dead ends: 90 [2018-12-03 16:11:28,769 INFO L226 Difference]: Without dead ends: 88 [2018-12-03 16:11:28,771 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1105, Invalid=1345, Unknown=0, NotChecked=0, Total=2450 [2018-12-03 16:11:28,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-12-03 16:11:28,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2018-12-03 16:11:28,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-12-03 16:11:28,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 116 transitions. [2018-12-03 16:11:28,776 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 116 transitions. Word has length 78 [2018-12-03 16:11:28,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:28,776 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 116 transitions. [2018-12-03 16:11:28,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-12-03 16:11:28,776 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 116 transitions. [2018-12-03 16:11:28,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-12-03 16:11:28,777 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:28,777 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1] [2018-12-03 16:11:28,777 INFO L423 AbstractCegarLoop]: === Iteration 18 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:28,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:28,778 INFO L82 PathProgramCache]: Analyzing trace with hash -233894880, now seen corresponding path program 16 times [2018-12-03 16:11:28,778 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:28,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:28,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:28,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:28,779 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:29,020 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 16:11:29,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:29,020 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:29,021 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:29,021 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:29,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:29,021 INFO 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 16:11:29,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:29,031 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:11:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:29,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:29,607 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 16:11:29,607 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:29,970 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 16:11:29,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:29,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2018-12-03 16:11:29,990 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:29,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-03 16:11:29,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-03 16:11:29,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=1514, Unknown=0, NotChecked=0, Total=2756 [2018-12-03 16:11:29,992 INFO L87 Difference]: Start difference. First operand 84 states and 116 transitions. Second operand 36 states. [2018-12-03 16:11:30,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:30,153 INFO L93 Difference]: Finished difference Result 95 states and 131 transitions. [2018-12-03 16:11:30,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-03 16:11:30,153 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 83 [2018-12-03 16:11:30,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:30,155 INFO L225 Difference]: With dead ends: 95 [2018-12-03 16:11:30,155 INFO L226 Difference]: Without dead ends: 93 [2018-12-03 16:11:30,156 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1242, Invalid=1514, Unknown=0, NotChecked=0, Total=2756 [2018-12-03 16:11:30,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-12-03 16:11:30,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2018-12-03 16:11:30,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-03 16:11:30,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 123 transitions. [2018-12-03 16:11:30,160 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 123 transitions. Word has length 83 [2018-12-03 16:11:30,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:30,161 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 123 transitions. [2018-12-03 16:11:30,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-03 16:11:30,161 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 123 transitions. [2018-12-03 16:11:30,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-12-03 16:11:30,162 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:30,162 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1] [2018-12-03 16:11:30,162 INFO L423 AbstractCegarLoop]: === Iteration 19 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:30,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:30,162 INFO L82 PathProgramCache]: Analyzing trace with hash -610287599, now seen corresponding path program 17 times [2018-12-03 16:11:30,163 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:30,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:30,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:30,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:30,164 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:30,396 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 16:11:30,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:30,396 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:30,396 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:30,397 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:30,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:30,397 INFO 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 16:11:30,405 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:11:30,406 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:11:30,442 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-12-03 16:11:30,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:30,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:31,031 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 16:11:31,031 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:31,446 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 16:11:31,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:31,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2018-12-03 16:11:31,466 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:31,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-12-03 16:11:31,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-12-03 16:11:31,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1387, Invalid=1693, Unknown=0, NotChecked=0, Total=3080 [2018-12-03 16:11:31,468 INFO L87 Difference]: Start difference. First operand 89 states and 123 transitions. Second operand 38 states. [2018-12-03 16:11:31,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:31,591 INFO L93 Difference]: Finished difference Result 100 states and 138 transitions. [2018-12-03 16:11:31,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-03 16:11:31,592 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 88 [2018-12-03 16:11:31,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:31,593 INFO L225 Difference]: With dead ends: 100 [2018-12-03 16:11:31,593 INFO L226 Difference]: Without dead ends: 98 [2018-12-03 16:11:31,594 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1387, Invalid=1693, Unknown=0, NotChecked=0, Total=3080 [2018-12-03 16:11:31,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-12-03 16:11:31,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2018-12-03 16:11:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-12-03 16:11:31,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 130 transitions. [2018-12-03 16:11:31,599 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 130 transitions. Word has length 88 [2018-12-03 16:11:31,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:31,599 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 130 transitions. [2018-12-03 16:11:31,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-12-03 16:11:31,600 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 130 transitions. [2018-12-03 16:11:31,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-12-03 16:11:31,600 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:31,600 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1] [2018-12-03 16:11:31,601 INFO L423 AbstractCegarLoop]: === Iteration 20 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:31,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:31,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2059852480, now seen corresponding path program 18 times [2018-12-03 16:11:31,601 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:31,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:31,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:31,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:31,602 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:31,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:31,900 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 16:11:31,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:31,900 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:31,900 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:31,901 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:31,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:31,901 INFO 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 16:11:31,910 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:11:31,910 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:11:31,931 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:11:31,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:31,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:32,470 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 16:11:32,470 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:33,052 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 16:11:33,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:33,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2018-12-03 16:11:33,071 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:33,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-12-03 16:11:33,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-12-03 16:11:33,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1882, Unknown=0, NotChecked=0, Total=3422 [2018-12-03 16:11:33,073 INFO L87 Difference]: Start difference. First operand 94 states and 130 transitions. Second operand 40 states. [2018-12-03 16:11:33,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:33,175 INFO L93 Difference]: Finished difference Result 105 states and 145 transitions. [2018-12-03 16:11:33,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-03 16:11:33,175 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 93 [2018-12-03 16:11:33,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:33,176 INFO L225 Difference]: With dead ends: 105 [2018-12-03 16:11:33,177 INFO L226 Difference]: Without dead ends: 103 [2018-12-03 16:11:33,178 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1540, Invalid=1882, Unknown=0, NotChecked=0, Total=3422 [2018-12-03 16:11:33,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-12-03 16:11:33,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-12-03 16:11:33,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-12-03 16:11:33,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 137 transitions. [2018-12-03 16:11:33,182 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 137 transitions. Word has length 93 [2018-12-03 16:11:33,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:33,182 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 137 transitions. [2018-12-03 16:11:33,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-12-03 16:11:33,183 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 137 transitions. [2018-12-03 16:11:33,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-12-03 16:11:33,183 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:33,184 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1] [2018-12-03 16:11:33,184 INFO L423 AbstractCegarLoop]: === Iteration 21 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:33,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:33,184 INFO L82 PathProgramCache]: Analyzing trace with hash -996141711, now seen corresponding path program 19 times [2018-12-03 16:11:33,184 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:33,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:33,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:33,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:33,185 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:33,469 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 16:11:33,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:33,470 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:33,470 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:33,470 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:33,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:33,470 INFO 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 16:11:33,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:33,479 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:11:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:33,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:33,997 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 16:11:33,997 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:34,821 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 16:11:34,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:34,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2018-12-03 16:11:34,842 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:34,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-12-03 16:11:34,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-12-03 16:11:34,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1701, Invalid=2081, Unknown=0, NotChecked=0, Total=3782 [2018-12-03 16:11:34,844 INFO L87 Difference]: Start difference. First operand 99 states and 137 transitions. Second operand 42 states. [2018-12-03 16:11:34,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:34,984 INFO L93 Difference]: Finished difference Result 110 states and 152 transitions. [2018-12-03 16:11:34,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-03 16:11:34,985 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 98 [2018-12-03 16:11:34,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:34,986 INFO L225 Difference]: With dead ends: 110 [2018-12-03 16:11:34,986 INFO L226 Difference]: Without dead ends: 108 [2018-12-03 16:11:34,987 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1701, Invalid=2081, Unknown=0, NotChecked=0, Total=3782 [2018-12-03 16:11:34,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-12-03 16:11:34,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2018-12-03 16:11:34,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-12-03 16:11:34,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 144 transitions. [2018-12-03 16:11:34,991 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 144 transitions. Word has length 98 [2018-12-03 16:11:34,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:34,992 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 144 transitions. [2018-12-03 16:11:34,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-12-03 16:11:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 144 transitions. [2018-12-03 16:11:34,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-12-03 16:11:34,993 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:34,993 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1] [2018-12-03 16:11:34,993 INFO L423 AbstractCegarLoop]: === Iteration 22 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:34,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:34,994 INFO L82 PathProgramCache]: Analyzing trace with hash -511385248, now seen corresponding path program 20 times [2018-12-03 16:11:34,994 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:34,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:34,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:34,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:34,995 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:35,638 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 16:11:35,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:35,638 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:35,639 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:35,639 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:35,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:35,639 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:11:35,648 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:11:35,648 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:11:35,687 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-12-03 16:11:35,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:35,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:37,812 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 16:11:37,812 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:38,399 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 16:11:38,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:38,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 64 [2018-12-03 16:11:38,418 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:38,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-12-03 16:11:38,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-12-03 16:11:38,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1870, Invalid=2290, Unknown=0, NotChecked=0, Total=4160 [2018-12-03 16:11:38,421 INFO L87 Difference]: Start difference. First operand 104 states and 144 transitions. Second operand 44 states. [2018-12-03 16:11:38,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:38,663 INFO L93 Difference]: Finished difference Result 115 states and 159 transitions. [2018-12-03 16:11:38,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-03 16:11:38,664 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 103 [2018-12-03 16:11:38,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:38,666 INFO L225 Difference]: With dead ends: 115 [2018-12-03 16:11:38,666 INFO L226 Difference]: Without dead ends: 113 [2018-12-03 16:11:38,668 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1870, Invalid=2290, Unknown=0, NotChecked=0, Total=4160 [2018-12-03 16:11:38,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-12-03 16:11:38,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2018-12-03 16:11:38,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-12-03 16:11:38,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 151 transitions. [2018-12-03 16:11:38,673 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 151 transitions. Word has length 103 [2018-12-03 16:11:38,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:38,673 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 151 transitions. [2018-12-03 16:11:38,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-12-03 16:11:38,673 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 151 transitions. [2018-12-03 16:11:38,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-12-03 16:11:38,674 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:38,674 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1] [2018-12-03 16:11:38,674 INFO L423 AbstractCegarLoop]: === Iteration 23 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:38,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:38,675 INFO L82 PathProgramCache]: Analyzing trace with hash 851260113, now seen corresponding path program 21 times [2018-12-03 16:11:38,675 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:38,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:38,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:38,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:38,676 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:39,270 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 16:11:39,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:39,270 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:39,270 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:39,270 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:39,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:39,270 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:11:39,280 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:11:39,280 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:11:39,305 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:11:39,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:39,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:40,042 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 16:11:40,042 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:40,837 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 16:11:40,858 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:40,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 67 [2018-12-03 16:11:40,858 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:40,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-12-03 16:11:40,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-12-03 16:11:40,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2047, Invalid=2509, Unknown=0, NotChecked=0, Total=4556 [2018-12-03 16:11:40,860 INFO L87 Difference]: Start difference. First operand 109 states and 151 transitions. Second operand 46 states. [2018-12-03 16:11:40,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:41,000 INFO L93 Difference]: Finished difference Result 120 states and 166 transitions. [2018-12-03 16:11:41,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-03 16:11:41,000 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 108 [2018-12-03 16:11:41,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:41,001 INFO L225 Difference]: With dead ends: 120 [2018-12-03 16:11:41,001 INFO L226 Difference]: Without dead ends: 118 [2018-12-03 16:11:41,002 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2047, Invalid=2509, Unknown=0, NotChecked=0, Total=4556 [2018-12-03 16:11:41,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-12-03 16:11:41,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2018-12-03 16:11:41,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-12-03 16:11:41,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 158 transitions. [2018-12-03 16:11:41,006 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 158 transitions. Word has length 108 [2018-12-03 16:11:41,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:41,007 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 158 transitions. [2018-12-03 16:11:41,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-12-03 16:11:41,007 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 158 transitions. [2018-12-03 16:11:41,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-12-03 16:11:41,008 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:41,008 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1] [2018-12-03 16:11:41,008 INFO L423 AbstractCegarLoop]: === Iteration 24 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:41,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:41,008 INFO L82 PathProgramCache]: Analyzing trace with hash -572317696, now seen corresponding path program 22 times [2018-12-03 16:11:41,009 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:41,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:41,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:41,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:41,009 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:41,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:41,373 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 16:11:41,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:41,373 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:41,373 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:41,373 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:41,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:41,373 INFO 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 16:11:41,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:41,384 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:11:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:41,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:42,127 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 16:11:42,127 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:42,877 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 16:11:42,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:42,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2018-12-03 16:11:42,896 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:42,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-12-03 16:11:42,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-12-03 16:11:42,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2232, Invalid=2738, Unknown=0, NotChecked=0, Total=4970 [2018-12-03 16:11:42,898 INFO L87 Difference]: Start difference. First operand 114 states and 158 transitions. Second operand 48 states. [2018-12-03 16:11:43,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:43,251 INFO L93 Difference]: Finished difference Result 125 states and 173 transitions. [2018-12-03 16:11:43,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-03 16:11:43,252 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 113 [2018-12-03 16:11:43,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:43,252 INFO L225 Difference]: With dead ends: 125 [2018-12-03 16:11:43,253 INFO L226 Difference]: Without dead ends: 123 [2018-12-03 16:11:43,253 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2232, Invalid=2738, Unknown=0, NotChecked=0, Total=4970 [2018-12-03 16:11:43,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-12-03 16:11:43,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-12-03 16:11:43,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-12-03 16:11:43,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 165 transitions. [2018-12-03 16:11:43,259 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 165 transitions. Word has length 113 [2018-12-03 16:11:43,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:43,260 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 165 transitions. [2018-12-03 16:11:43,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-12-03 16:11:43,260 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 165 transitions. [2018-12-03 16:11:43,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-12-03 16:11:43,260 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:43,261 INFO L402 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1] [2018-12-03 16:11:43,261 INFO L423 AbstractCegarLoop]: === Iteration 25 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:43,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:43,261 INFO L82 PathProgramCache]: Analyzing trace with hash 513611825, now seen corresponding path program 23 times [2018-12-03 16:11:43,261 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:43,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:43,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:43,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:43,262 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:43,705 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 16:11:43,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:43,705 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:43,705 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:43,706 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:43,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:43,706 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:11:43,714 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:11:43,715 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:11:43,769 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-12-03 16:11:43,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:43,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:44,425 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 16:11:44,426 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:45,395 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 16:11:45,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:45,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 73 [2018-12-03 16:11:45,414 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:45,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-12-03 16:11:45,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-12-03 16:11:45,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2425, Invalid=2977, Unknown=0, NotChecked=0, Total=5402 [2018-12-03 16:11:45,416 INFO L87 Difference]: Start difference. First operand 119 states and 165 transitions. Second operand 50 states. [2018-12-03 16:11:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:45,623 INFO L93 Difference]: Finished difference Result 130 states and 180 transitions. [2018-12-03 16:11:45,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-12-03 16:11:45,623 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 118 [2018-12-03 16:11:45,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:45,624 INFO L225 Difference]: With dead ends: 130 [2018-12-03 16:11:45,624 INFO L226 Difference]: Without dead ends: 128 [2018-12-03 16:11:45,625 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2425, Invalid=2977, Unknown=0, NotChecked=0, Total=5402 [2018-12-03 16:11:45,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-12-03 16:11:45,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2018-12-03 16:11:45,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-12-03 16:11:45,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 172 transitions. [2018-12-03 16:11:45,630 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 172 transitions. Word has length 118 [2018-12-03 16:11:45,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:45,630 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 172 transitions. [2018-12-03 16:11:45,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-12-03 16:11:45,631 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 172 transitions. [2018-12-03 16:11:45,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-12-03 16:11:45,631 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:45,632 INFO L402 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1] [2018-12-03 16:11:45,632 INFO L423 AbstractCegarLoop]: === Iteration 26 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:45,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:45,632 INFO L82 PathProgramCache]: Analyzing trace with hash -285501792, now seen corresponding path program 24 times [2018-12-03 16:11:45,632 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:45,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:45,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:45,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:45,633 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:45,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:46,043 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 16:11:46,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:46,043 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:46,043 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:46,043 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:46,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:46,044 INFO 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 16:11:46,052 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:11:46,053 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:11:46,081 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:11:46,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:46,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:46,927 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 16:11:46,927 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:47,763 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 16:11:47,782 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:47,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 76 [2018-12-03 16:11:47,782 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:47,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-12-03 16:11:47,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-12-03 16:11:47,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2626, Invalid=3226, Unknown=0, NotChecked=0, Total=5852 [2018-12-03 16:11:47,784 INFO L87 Difference]: Start difference. First operand 124 states and 172 transitions. Second operand 52 states. [2018-12-03 16:11:47,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:47,990 INFO L93 Difference]: Finished difference Result 135 states and 187 transitions. [2018-12-03 16:11:47,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-12-03 16:11:47,990 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 123 [2018-12-03 16:11:47,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:47,991 INFO L225 Difference]: With dead ends: 135 [2018-12-03 16:11:47,991 INFO L226 Difference]: Without dead ends: 133 [2018-12-03 16:11:47,992 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2626, Invalid=3226, Unknown=0, NotChecked=0, Total=5852 [2018-12-03 16:11:47,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-12-03 16:11:47,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2018-12-03 16:11:47,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-12-03 16:11:47,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 179 transitions. [2018-12-03 16:11:47,997 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 179 transitions. Word has length 123 [2018-12-03 16:11:47,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:47,998 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 179 transitions. [2018-12-03 16:11:47,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-12-03 16:11:47,998 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 179 transitions. [2018-12-03 16:11:47,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-12-03 16:11:47,999 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:47,999 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1] [2018-12-03 16:11:47,999 INFO L423 AbstractCegarLoop]: === Iteration 27 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:47,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:47,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1768277393, now seen corresponding path program 25 times [2018-12-03 16:11:48,000 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:48,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:48,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:48,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:48,001 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:48,466 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 16:11:48,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:48,466 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:48,466 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:48,466 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:48,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:48,466 INFO 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 16:11:48,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:48,476 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:11:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:48,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:49,147 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 16:11:49,147 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:50,315 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 16:11:50,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:50,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 79 [2018-12-03 16:11:50,334 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:50,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-12-03 16:11:50,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-12-03 16:11:50,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2835, Invalid=3485, Unknown=0, NotChecked=0, Total=6320 [2018-12-03 16:11:50,338 INFO L87 Difference]: Start difference. First operand 129 states and 179 transitions. Second operand 54 states. [2018-12-03 16:11:50,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:50,610 INFO L93 Difference]: Finished difference Result 140 states and 194 transitions. [2018-12-03 16:11:50,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-12-03 16:11:50,611 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 128 [2018-12-03 16:11:50,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:50,612 INFO L225 Difference]: With dead ends: 140 [2018-12-03 16:11:50,612 INFO L226 Difference]: Without dead ends: 138 [2018-12-03 16:11:50,612 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2835, Invalid=3485, Unknown=0, NotChecked=0, Total=6320 [2018-12-03 16:11:50,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-12-03 16:11:50,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2018-12-03 16:11:50,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-12-03 16:11:50,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 186 transitions. [2018-12-03 16:11:50,617 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 186 transitions. Word has length 128 [2018-12-03 16:11:50,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:50,617 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 186 transitions. [2018-12-03 16:11:50,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-12-03 16:11:50,618 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 186 transitions. [2018-12-03 16:11:50,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-12-03 16:11:50,618 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:50,618 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1] [2018-12-03 16:11:50,619 INFO L423 AbstractCegarLoop]: === Iteration 28 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:50,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:50,619 INFO L82 PathProgramCache]: Analyzing trace with hash -77052608, now seen corresponding path program 26 times [2018-12-03 16:11:50,619 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:50,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:50,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:50,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:50,620 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:51,140 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 16:11:51,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:51,140 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:51,140 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:51,140 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:51,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:51,141 INFO 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 16:11:51,149 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:11:51,150 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:11:51,219 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-12-03 16:11:51,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:51,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:52,265 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 16:11:52,265 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:53,371 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 16:11:53,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:53,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 82 [2018-12-03 16:11:53,391 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:53,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-12-03 16:11:53,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-12-03 16:11:53,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3052, Invalid=3754, Unknown=0, NotChecked=0, Total=6806 [2018-12-03 16:11:53,392 INFO L87 Difference]: Start difference. First operand 134 states and 186 transitions. Second operand 56 states. [2018-12-03 16:11:53,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:53,658 INFO L93 Difference]: Finished difference Result 145 states and 201 transitions. [2018-12-03 16:11:53,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-03 16:11:53,658 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 133 [2018-12-03 16:11:53,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:53,659 INFO L225 Difference]: With dead ends: 145 [2018-12-03 16:11:53,660 INFO L226 Difference]: Without dead ends: 143 [2018-12-03 16:11:53,660 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2862 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3052, Invalid=3754, Unknown=0, NotChecked=0, Total=6806 [2018-12-03 16:11:53,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-12-03 16:11:53,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-12-03 16:11:53,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-12-03 16:11:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 193 transitions. [2018-12-03 16:11:53,665 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 193 transitions. Word has length 133 [2018-12-03 16:11:53,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:53,666 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 193 transitions. [2018-12-03 16:11:53,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-12-03 16:11:53,666 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 193 transitions. [2018-12-03 16:11:53,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-12-03 16:11:53,667 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:53,667 INFO L402 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1] [2018-12-03 16:11:53,667 INFO L423 AbstractCegarLoop]: === Iteration 29 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:53,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:53,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1019034353, now seen corresponding path program 27 times [2018-12-03 16:11:53,668 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:53,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:53,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:53,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:53,669 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:54,222 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 16:11:54,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:54,222 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:54,222 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:54,222 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:54,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:54,223 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:11:54,231 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:11:54,232 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:11:54,270 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:11:54,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:11:54,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:55,476 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 16:11:55,476 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:56,459 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 16:11:56,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:56,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 85 [2018-12-03 16:11:56,479 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:56,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-12-03 16:11:56,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-12-03 16:11:56,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3277, Invalid=4033, Unknown=0, NotChecked=0, Total=7310 [2018-12-03 16:11:56,481 INFO L87 Difference]: Start difference. First operand 139 states and 193 transitions. Second operand 58 states. [2018-12-03 16:11:56,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:56,725 INFO L93 Difference]: Finished difference Result 150 states and 208 transitions. [2018-12-03 16:11:56,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-12-03 16:11:56,725 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 138 [2018-12-03 16:11:56,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:56,727 INFO L225 Difference]: With dead ends: 150 [2018-12-03 16:11:56,727 INFO L226 Difference]: Without dead ends: 148 [2018-12-03 16:11:56,727 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3277, Invalid=4033, Unknown=0, NotChecked=0, Total=7310 [2018-12-03 16:11:56,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-12-03 16:11:56,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2018-12-03 16:11:56,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-12-03 16:11:56,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 200 transitions. [2018-12-03 16:11:56,733 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 200 transitions. Word has length 138 [2018-12-03 16:11:56,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:56,733 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 200 transitions. [2018-12-03 16:11:56,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-12-03 16:11:56,734 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 200 transitions. [2018-12-03 16:11:56,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-12-03 16:11:56,734 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:56,735 INFO L402 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1] [2018-12-03 16:11:56,735 INFO L423 AbstractCegarLoop]: === Iteration 30 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:56,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:56,735 INFO L82 PathProgramCache]: Analyzing trace with hash -247256096, now seen corresponding path program 28 times [2018-12-03 16:11:56,735 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:56,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:56,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:11:56,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:56,736 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:57,213 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 16:11:57,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:57,214 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:11:57,214 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:11:57,214 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:11:57,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:11:57,215 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:11:57,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:57,224 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:11:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:11:57,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:11:58,025 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 16:11:58,026 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:11:59,094 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 16:11:59,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:11:59,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 88 [2018-12-03 16:11:59,113 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:11:59,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-12-03 16:11:59,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-12-03 16:11:59,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3510, Invalid=4322, Unknown=0, NotChecked=0, Total=7832 [2018-12-03 16:11:59,115 INFO L87 Difference]: Start difference. First operand 144 states and 200 transitions. Second operand 60 states. [2018-12-03 16:11:59,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:11:59,348 INFO L93 Difference]: Finished difference Result 155 states and 215 transitions. [2018-12-03 16:11:59,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-03 16:11:59,349 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 143 [2018-12-03 16:11:59,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:11:59,350 INFO L225 Difference]: With dead ends: 155 [2018-12-03 16:11:59,350 INFO L226 Difference]: Without dead ends: 153 [2018-12-03 16:11:59,351 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3306 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3510, Invalid=4322, Unknown=0, NotChecked=0, Total=7832 [2018-12-03 16:11:59,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-12-03 16:11:59,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2018-12-03 16:11:59,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-12-03 16:11:59,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 207 transitions. [2018-12-03 16:11:59,358 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 207 transitions. Word has length 143 [2018-12-03 16:11:59,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:11:59,358 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 207 transitions. [2018-12-03 16:11:59,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-12-03 16:11:59,359 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 207 transitions. [2018-12-03 16:11:59,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-12-03 16:11:59,360 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:11:59,360 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1] [2018-12-03 16:11:59,360 INFO L423 AbstractCegarLoop]: === Iteration 31 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:11:59,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:11:59,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1791588433, now seen corresponding path program 29 times [2018-12-03 16:11:59,361 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:11:59,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:59,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:11:59,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:11:59,362 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:11:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:00,665 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 16:12:00,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:00,665 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:12:00,666 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:12:00,666 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:12:00,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:00,666 INFO 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 16:12:00,676 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:12:00,676 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:12:00,739 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-12-03 16:12:00,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:12:00,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:12:01,587 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 16:12:01,587 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:12:02,747 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 16:12:02,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:12:02,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 91 [2018-12-03 16:12:02,767 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:12:02,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-12-03 16:12:02,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-12-03 16:12:02,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3751, Invalid=4621, Unknown=0, NotChecked=0, Total=8372 [2018-12-03 16:12:02,768 INFO L87 Difference]: Start difference. First operand 149 states and 207 transitions. Second operand 62 states. [2018-12-03 16:12:03,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:12:03,036 INFO L93 Difference]: Finished difference Result 160 states and 222 transitions. [2018-12-03 16:12:03,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-12-03 16:12:03,036 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 148 [2018-12-03 16:12:03,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:12:03,037 INFO L225 Difference]: With dead ends: 160 [2018-12-03 16:12:03,038 INFO L226 Difference]: Without dead ends: 158 [2018-12-03 16:12:03,038 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3540 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3751, Invalid=4621, Unknown=0, NotChecked=0, Total=8372 [2018-12-03 16:12:03,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-12-03 16:12:03,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2018-12-03 16:12:03,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-12-03 16:12:03,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 214 transitions. [2018-12-03 16:12:03,044 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 214 transitions. Word has length 148 [2018-12-03 16:12:03,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:12:03,044 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 214 transitions. [2018-12-03 16:12:03,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-12-03 16:12:03,044 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 214 transitions. [2018-12-03 16:12:03,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-12-03 16:12:03,045 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:12:03,045 INFO L402 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1] [2018-12-03 16:12:03,045 INFO L423 AbstractCegarLoop]: === Iteration 32 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:12:03,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:12:03,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1713785472, now seen corresponding path program 30 times [2018-12-03 16:12:03,046 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:12:03,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:03,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:12:03,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:03,047 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:12:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:03,620 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 16:12:03,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:03,621 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:12:03,621 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:12:03,621 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:12:03,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:03,621 INFO 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 16:12:03,630 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:12:03,630 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:12:03,671 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:12:03,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:12:03,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:12:04,622 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 16:12:04,622 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:12:06,200 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 16:12:06,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:12:06,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 94 [2018-12-03 16:12:06,220 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:12:06,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-12-03 16:12:06,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-12-03 16:12:06,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4000, Invalid=4930, Unknown=0, NotChecked=0, Total=8930 [2018-12-03 16:12:06,222 INFO L87 Difference]: Start difference. First operand 154 states and 214 transitions. Second operand 64 states. [2018-12-03 16:12:06,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:12:06,762 INFO L93 Difference]: Finished difference Result 165 states and 229 transitions. [2018-12-03 16:12:06,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-03 16:12:06,762 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 153 [2018-12-03 16:12:06,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:12:06,763 INFO L225 Difference]: With dead ends: 165 [2018-12-03 16:12:06,764 INFO L226 Difference]: Without dead ends: 163 [2018-12-03 16:12:06,764 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4000, Invalid=4930, Unknown=0, NotChecked=0, Total=8930 [2018-12-03 16:12:06,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-12-03 16:12:06,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-12-03 16:12:06,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-12-03 16:12:06,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 221 transitions. [2018-12-03 16:12:06,771 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 221 transitions. Word has length 153 [2018-12-03 16:12:06,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:12:06,771 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 221 transitions. [2018-12-03 16:12:06,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-12-03 16:12:06,772 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 221 transitions. [2018-12-03 16:12:06,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-12-03 16:12:06,772 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:12:06,773 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1] [2018-12-03 16:12:06,773 INFO L423 AbstractCegarLoop]: === Iteration 33 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:12:06,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:12:06,773 INFO L82 PathProgramCache]: Analyzing trace with hash -835682895, now seen corresponding path program 31 times [2018-12-03 16:12:06,773 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:12:06,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:06,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:12:06,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:06,775 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:12:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:07,430 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 16:12:07,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:07,430 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:12:07,430 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:12:07,431 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:12:07,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:07,431 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:12:07,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:12:07,440 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:12:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:07,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:12:08,538 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 16:12:08,538 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:12:09,843 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 16:12:09,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:12:09,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 97 [2018-12-03 16:12:09,862 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:12:09,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-12-03 16:12:09,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-12-03 16:12:09,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4257, Invalid=5249, Unknown=0, NotChecked=0, Total=9506 [2018-12-03 16:12:09,865 INFO L87 Difference]: Start difference. First operand 159 states and 221 transitions. Second operand 66 states. [2018-12-03 16:12:10,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:12:10,826 INFO L93 Difference]: Finished difference Result 170 states and 236 transitions. [2018-12-03 16:12:10,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-12-03 16:12:10,826 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 158 [2018-12-03 16:12:10,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:12:10,828 INFO L225 Difference]: With dead ends: 170 [2018-12-03 16:12:10,828 INFO L226 Difference]: Without dead ends: 168 [2018-12-03 16:12:10,829 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4032 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4257, Invalid=5249, Unknown=0, NotChecked=0, Total=9506 [2018-12-03 16:12:10,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-12-03 16:12:10,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2018-12-03 16:12:10,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-12-03 16:12:10,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 228 transitions. [2018-12-03 16:12:10,836 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 228 transitions. Word has length 158 [2018-12-03 16:12:10,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:12:10,836 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 228 transitions. [2018-12-03 16:12:10,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-12-03 16:12:10,836 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 228 transitions. [2018-12-03 16:12:10,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-12-03 16:12:10,837 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:12:10,837 INFO L402 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1] [2018-12-03 16:12:10,837 INFO L423 AbstractCegarLoop]: === Iteration 34 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:12:10,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:12:10,838 INFO L82 PathProgramCache]: Analyzing trace with hash 925606176, now seen corresponding path program 32 times [2018-12-03 16:12:10,838 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:12:10,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:10,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:12:10,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:10,839 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:12:10,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:11,538 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 16:12:11,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:11,539 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:12:11,539 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:12:11,539 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:12:11,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:11,539 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:12:11,547 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:12:11,547 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:12:11,622 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-12-03 16:12:11,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:12:11,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:12:12,586 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 16:12:12,586 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:12:13,953 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 16:12:13,972 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:12:13,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 100 [2018-12-03 16:12:13,973 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:12:13,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-12-03 16:12:13,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-12-03 16:12:13,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4522, Invalid=5578, Unknown=0, NotChecked=0, Total=10100 [2018-12-03 16:12:13,975 INFO L87 Difference]: Start difference. First operand 164 states and 228 transitions. Second operand 68 states. [2018-12-03 16:12:14,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:12:14,283 INFO L93 Difference]: Finished difference Result 175 states and 243 transitions. [2018-12-03 16:12:14,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-12-03 16:12:14,289 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 163 [2018-12-03 16:12:14,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:12:14,291 INFO L225 Difference]: With dead ends: 175 [2018-12-03 16:12:14,291 INFO L226 Difference]: Without dead ends: 173 [2018-12-03 16:12:14,292 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4290 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4522, Invalid=5578, Unknown=0, NotChecked=0, Total=10100 [2018-12-03 16:12:14,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-12-03 16:12:14,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2018-12-03 16:12:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-12-03 16:12:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 235 transitions. [2018-12-03 16:12:14,299 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 235 transitions. Word has length 163 [2018-12-03 16:12:14,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:12:14,299 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 235 transitions. [2018-12-03 16:12:14,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-12-03 16:12:14,300 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 235 transitions. [2018-12-03 16:12:14,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-12-03 16:12:14,300 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:12:14,301 INFO L402 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1] [2018-12-03 16:12:14,301 INFO L423 AbstractCegarLoop]: === Iteration 35 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:12:14,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:12:14,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1441248495, now seen corresponding path program 33 times [2018-12-03 16:12:14,301 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:12:14,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:14,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:12:14,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:14,303 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:12:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:15,156 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 16:12:15,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:15,156 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:12:15,157 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:12:15,157 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:12:15,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:15,157 INFO 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 16:12:15,165 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:12:15,165 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:12:15,225 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:12:15,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:12:15,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:12:16,619 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 16:12:16,620 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:12:18,289 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 16:12:18,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:12:18,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 103 [2018-12-03 16:12:18,318 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:12:18,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-12-03 16:12:18,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-12-03 16:12:18,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4795, Invalid=5917, Unknown=0, NotChecked=0, Total=10712 [2018-12-03 16:12:18,321 INFO L87 Difference]: Start difference. First operand 169 states and 235 transitions. Second operand 70 states. [2018-12-03 16:12:18,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:12:18,809 INFO L93 Difference]: Finished difference Result 180 states and 250 transitions. [2018-12-03 16:12:18,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-12-03 16:12:18,809 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 168 [2018-12-03 16:12:18,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:12:18,811 INFO L225 Difference]: With dead ends: 180 [2018-12-03 16:12:18,811 INFO L226 Difference]: Without dead ends: 178 [2018-12-03 16:12:18,811 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4556 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4795, Invalid=5917, Unknown=0, NotChecked=0, Total=10712 [2018-12-03 16:12:18,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-12-03 16:12:18,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2018-12-03 16:12:18,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-12-03 16:12:18,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 242 transitions. [2018-12-03 16:12:18,818 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 242 transitions. Word has length 168 [2018-12-03 16:12:18,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:12:18,818 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 242 transitions. [2018-12-03 16:12:18,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-12-03 16:12:18,819 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 242 transitions. [2018-12-03 16:12:18,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-12-03 16:12:18,819 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:12:18,820 INFO L402 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1] [2018-12-03 16:12:18,820 INFO L423 AbstractCegarLoop]: === Iteration 36 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:12:18,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:12:18,820 INFO L82 PathProgramCache]: Analyzing trace with hash 686632896, now seen corresponding path program 34 times [2018-12-03 16:12:18,820 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:12:18,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:18,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:12:18,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:18,821 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:12:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:19,723 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 16:12:19,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:19,724 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:12:19,724 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:12:19,724 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:12:19,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:19,724 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 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 16:12:19,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:12:19,734 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:12:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:19,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:12:21,079 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 16:12:21,079 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:12:22,609 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 16:12:22,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:12:22,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 106 [2018-12-03 16:12:22,635 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:12:22,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-12-03 16:12:22,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-12-03 16:12:22,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5076, Invalid=6266, Unknown=0, NotChecked=0, Total=11342 [2018-12-03 16:12:22,639 INFO L87 Difference]: Start difference. First operand 174 states and 242 transitions. Second operand 72 states. [2018-12-03 16:12:23,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:12:23,098 INFO L93 Difference]: Finished difference Result 185 states and 257 transitions. [2018-12-03 16:12:23,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-12-03 16:12:23,099 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 173 [2018-12-03 16:12:23,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:12:23,100 INFO L225 Difference]: With dead ends: 185 [2018-12-03 16:12:23,100 INFO L226 Difference]: Without dead ends: 183 [2018-12-03 16:12:23,101 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4830 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5076, Invalid=6266, Unknown=0, NotChecked=0, Total=11342 [2018-12-03 16:12:23,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-12-03 16:12:23,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-12-03 16:12:23,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-12-03 16:12:23,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 249 transitions. [2018-12-03 16:12:23,108 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 249 transitions. Word has length 173 [2018-12-03 16:12:23,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:12:23,109 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 249 transitions. [2018-12-03 16:12:23,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-12-03 16:12:23,109 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 249 transitions. [2018-12-03 16:12:23,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-12-03 16:12:23,110 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:12:23,110 INFO L402 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1] [2018-12-03 16:12:23,110 INFO L423 AbstractCegarLoop]: === Iteration 37 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:12:23,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:12:23,111 INFO L82 PathProgramCache]: Analyzing trace with hash 170319985, now seen corresponding path program 35 times [2018-12-03 16:12:23,111 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:12:23,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:23,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:12:23,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:23,112 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:12:23,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:24,159 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 16:12:24,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:24,159 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:12:24,160 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:12:24,160 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:12:24,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:24,160 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 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 16:12:24,168 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:12:24,168 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:12:24,248 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-12-03 16:12:24,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:12:24,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:12:26,790 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 16:12:26,790 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:12:28,383 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 16:12:28,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:12:28,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 109 [2018-12-03 16:12:28,402 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:12:28,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-12-03 16:12:28,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-12-03 16:12:28,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5365, Invalid=6625, Unknown=0, NotChecked=0, Total=11990 [2018-12-03 16:12:28,404 INFO L87 Difference]: Start difference. First operand 179 states and 249 transitions. Second operand 74 states. [2018-12-03 16:12:28,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:12:28,757 INFO L93 Difference]: Finished difference Result 190 states and 264 transitions. [2018-12-03 16:12:28,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-12-03 16:12:28,758 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 178 [2018-12-03 16:12:28,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:12:28,759 INFO L225 Difference]: With dead ends: 190 [2018-12-03 16:12:28,759 INFO L226 Difference]: Without dead ends: 188 [2018-12-03 16:12:28,760 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5112 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5365, Invalid=6625, Unknown=0, NotChecked=0, Total=11990 [2018-12-03 16:12:28,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-12-03 16:12:28,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2018-12-03 16:12:28,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-12-03 16:12:28,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 256 transitions. [2018-12-03 16:12:28,767 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 256 transitions. Word has length 178 [2018-12-03 16:12:28,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:12:28,767 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 256 transitions. [2018-12-03 16:12:28,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-12-03 16:12:28,767 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 256 transitions. [2018-12-03 16:12:28,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-12-03 16:12:28,768 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:12:28,768 INFO L402 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1] [2018-12-03 16:12:28,769 INFO L423 AbstractCegarLoop]: === Iteration 38 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:12:28,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:12:28,769 INFO L82 PathProgramCache]: Analyzing trace with hash -2021329312, now seen corresponding path program 36 times [2018-12-03 16:12:28,769 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:12:28,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:28,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:12:28,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:28,770 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:12:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:29,548 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 16:12:29,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:29,549 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:12:29,549 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:12:29,549 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:12:29,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:29,549 INFO 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 16:12:29,559 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:12:29,559 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:12:29,604 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:12:29,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:12:29,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:12:30,817 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 16:12:30,818 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:12:32,789 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 16:12:32,808 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:12:32,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 112 [2018-12-03 16:12:32,808 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:12:32,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-12-03 16:12:32,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-12-03 16:12:32,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5662, Invalid=6994, Unknown=0, NotChecked=0, Total=12656 [2018-12-03 16:12:32,810 INFO L87 Difference]: Start difference. First operand 184 states and 256 transitions. Second operand 76 states. [2018-12-03 16:12:33,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:12:33,398 INFO L93 Difference]: Finished difference Result 195 states and 271 transitions. [2018-12-03 16:12:33,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-12-03 16:12:33,398 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 183 [2018-12-03 16:12:33,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:12:33,399 INFO L225 Difference]: With dead ends: 195 [2018-12-03 16:12:33,399 INFO L226 Difference]: Without dead ends: 193 [2018-12-03 16:12:33,403 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5402 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5662, Invalid=6994, Unknown=0, NotChecked=0, Total=12656 [2018-12-03 16:12:33,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-12-03 16:12:33,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2018-12-03 16:12:33,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-12-03 16:12:33,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 263 transitions. [2018-12-03 16:12:33,410 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 263 transitions. Word has length 183 [2018-12-03 16:12:33,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:12:33,411 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 263 transitions. [2018-12-03 16:12:33,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-12-03 16:12:33,411 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 263 transitions. [2018-12-03 16:12:33,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-12-03 16:12:33,412 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:12:33,412 INFO L402 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1] [2018-12-03 16:12:33,413 INFO L423 AbstractCegarLoop]: === Iteration 39 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:12:33,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:12:33,413 INFO L82 PathProgramCache]: Analyzing trace with hash 578960849, now seen corresponding path program 37 times [2018-12-03 16:12:33,413 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:12:33,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:33,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:12:33,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:33,414 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:12:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:34,779 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 16:12:34,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:34,780 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:12:34,780 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:12:34,780 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:12:34,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:34,780 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:12:34,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:12:34,789 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:12:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:34,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:12:36,318 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 16:12:36,318 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:12:38,161 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 16:12:38,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:12:38,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 115 [2018-12-03 16:12:38,180 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:12:38,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-12-03 16:12:38,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-12-03 16:12:38,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5967, Invalid=7373, Unknown=0, NotChecked=0, Total=13340 [2018-12-03 16:12:38,182 INFO L87 Difference]: Start difference. First operand 189 states and 263 transitions. Second operand 78 states. [2018-12-03 16:12:38,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:12:38,582 INFO L93 Difference]: Finished difference Result 200 states and 278 transitions. [2018-12-03 16:12:38,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-12-03 16:12:38,582 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 188 [2018-12-03 16:12:38,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:12:38,584 INFO L225 Difference]: With dead ends: 200 [2018-12-03 16:12:38,584 INFO L226 Difference]: Without dead ends: 198 [2018-12-03 16:12:38,585 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5700 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5967, Invalid=7373, Unknown=0, NotChecked=0, Total=13340 [2018-12-03 16:12:38,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-12-03 16:12:38,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2018-12-03 16:12:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-12-03 16:12:38,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 270 transitions. [2018-12-03 16:12:38,590 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 270 transitions. Word has length 188 [2018-12-03 16:12:38,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:12:38,590 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 270 transitions. [2018-12-03 16:12:38,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-12-03 16:12:38,591 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 270 transitions. [2018-12-03 16:12:38,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-12-03 16:12:38,591 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:12:38,591 INFO L402 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1] [2018-12-03 16:12:38,592 INFO L423 AbstractCegarLoop]: === Iteration 40 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:12:38,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:12:38,592 INFO L82 PathProgramCache]: Analyzing trace with hash -963840768, now seen corresponding path program 38 times [2018-12-03 16:12:38,592 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:12:38,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:38,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:12:38,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:38,593 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:12:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:39,449 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 16:12:39,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:39,450 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:12:39,450 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:12:39,450 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:12:39,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:39,450 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:12:39,460 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:12:39,460 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:12:39,778 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-12-03 16:12:39,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:12:39,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:12:41,096 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 16:12:41,096 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:12:43,067 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 16:12:43,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:12:43,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 118 [2018-12-03 16:12:43,087 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:12:43,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-12-03 16:12:43,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-12-03 16:12:43,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6280, Invalid=7762, Unknown=0, NotChecked=0, Total=14042 [2018-12-03 16:12:43,089 INFO L87 Difference]: Start difference. First operand 194 states and 270 transitions. Second operand 80 states. [2018-12-03 16:12:43,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:12:43,498 INFO L93 Difference]: Finished difference Result 205 states and 285 transitions. [2018-12-03 16:12:43,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-12-03 16:12:43,498 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 193 [2018-12-03 16:12:43,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:12:43,499 INFO L225 Difference]: With dead ends: 205 [2018-12-03 16:12:43,499 INFO L226 Difference]: Without dead ends: 203 [2018-12-03 16:12:43,500 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6006 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6280, Invalid=7762, Unknown=0, NotChecked=0, Total=14042 [2018-12-03 16:12:43,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-12-03 16:12:43,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-12-03 16:12:43,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-12-03 16:12:43,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 277 transitions. [2018-12-03 16:12:43,507 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 277 transitions. Word has length 193 [2018-12-03 16:12:43,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:12:43,508 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 277 transitions. [2018-12-03 16:12:43,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-12-03 16:12:43,508 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 277 transitions. [2018-12-03 16:12:43,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-12-03 16:12:43,509 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:12:43,509 INFO L402 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1] [2018-12-03 16:12:43,509 INFO L423 AbstractCegarLoop]: === Iteration 41 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:12:43,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:12:43,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1345297615, now seen corresponding path program 39 times [2018-12-03 16:12:43,510 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:12:43,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:43,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:12:43,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:43,510 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:12:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:45,018 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 16:12:45,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:45,019 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:12:45,019 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:12:45,019 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:12:45,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:45,019 INFO 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 16:12:45,028 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:12:45,028 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:12:45,075 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:12:45,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:12:45,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:12:46,661 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 16:12:46,661 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:12:48,626 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 16:12:48,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:12:48,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 121 [2018-12-03 16:12:48,646 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:12:48,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-12-03 16:12:48,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-12-03 16:12:48,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6601, Invalid=8161, Unknown=0, NotChecked=0, Total=14762 [2018-12-03 16:12:48,648 INFO L87 Difference]: Start difference. First operand 199 states and 277 transitions. Second operand 82 states. [2018-12-03 16:12:49,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:12:49,130 INFO L93 Difference]: Finished difference Result 210 states and 292 transitions. [2018-12-03 16:12:49,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-12-03 16:12:49,130 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 198 [2018-12-03 16:12:49,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:12:49,131 INFO L225 Difference]: With dead ends: 210 [2018-12-03 16:12:49,131 INFO L226 Difference]: Without dead ends: 208 [2018-12-03 16:12:49,132 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6320 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6601, Invalid=8161, Unknown=0, NotChecked=0, Total=14762 [2018-12-03 16:12:49,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-12-03 16:12:49,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2018-12-03 16:12:49,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-12-03 16:12:49,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 284 transitions. [2018-12-03 16:12:49,137 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 284 transitions. Word has length 198 [2018-12-03 16:12:49,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:12:49,137 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 284 transitions. [2018-12-03 16:12:49,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-12-03 16:12:49,138 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 284 transitions. [2018-12-03 16:12:49,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-12-03 16:12:49,138 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:12:49,138 INFO L402 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1] [2018-12-03 16:12:49,139 INFO L423 AbstractCegarLoop]: === Iteration 42 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:12:49,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:12:49,139 INFO L82 PathProgramCache]: Analyzing trace with hash 555690912, now seen corresponding path program 40 times [2018-12-03 16:12:49,139 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:12:49,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:49,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:12:49,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:49,140 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:12:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:50,578 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 16:12:50,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:50,578 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:12:50,578 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:12:50,578 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:12:50,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:50,578 INFO 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 16:12:50,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:12:50,586 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:12:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:50,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:12:52,243 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 16:12:52,243 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:12:54,314 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 16:12:54,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:12:54,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 124 [2018-12-03 16:12:54,333 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:12:54,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-12-03 16:12:54,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-12-03 16:12:54,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6930, Invalid=8570, Unknown=0, NotChecked=0, Total=15500 [2018-12-03 16:12:54,335 INFO L87 Difference]: Start difference. First operand 204 states and 284 transitions. Second operand 84 states. [2018-12-03 16:12:54,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:12:54,816 INFO L93 Difference]: Finished difference Result 215 states and 299 transitions. [2018-12-03 16:12:54,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-12-03 16:12:54,816 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 203 [2018-12-03 16:12:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:12:54,817 INFO L225 Difference]: With dead ends: 215 [2018-12-03 16:12:54,817 INFO L226 Difference]: Without dead ends: 213 [2018-12-03 16:12:54,818 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6642 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6930, Invalid=8570, Unknown=0, NotChecked=0, Total=15500 [2018-12-03 16:12:54,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-12-03 16:12:54,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 209. [2018-12-03 16:12:54,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-12-03 16:12:54,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 291 transitions. [2018-12-03 16:12:54,825 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 291 transitions. Word has length 203 [2018-12-03 16:12:54,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:12:54,825 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 291 transitions. [2018-12-03 16:12:54,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-12-03 16:12:54,825 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 291 transitions. [2018-12-03 16:12:54,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-12-03 16:12:54,826 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:12:54,827 INFO L402 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1] [2018-12-03 16:12:54,827 INFO L423 AbstractCegarLoop]: === Iteration 43 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:12:54,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:12:54,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1463242897, now seen corresponding path program 41 times [2018-12-03 16:12:54,827 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:12:54,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:54,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:12:54,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:12:54,828 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:12:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:12:57,302 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 16:12:57,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:57,303 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:12:57,303 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:12:57,303 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:12:57,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:12:57,303 INFO 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 16:12:57,313 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:12:57,313 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:12:57,399 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-12-03 16:12:57,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:12:57,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:13:00,531 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 16:13:00,531 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:13:03,248 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 16:13:03,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:13:03,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 127 [2018-12-03 16:13:03,268 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:13:03,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-12-03 16:13:03,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-12-03 16:13:03,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7267, Invalid=8989, Unknown=0, NotChecked=0, Total=16256 [2018-12-03 16:13:03,270 INFO L87 Difference]: Start difference. First operand 209 states and 291 transitions. Second operand 86 states. [2018-12-03 16:13:03,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:13:03,735 INFO L93 Difference]: Finished difference Result 220 states and 306 transitions. [2018-12-03 16:13:03,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-12-03 16:13:03,735 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 208 [2018-12-03 16:13:03,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:13:03,736 INFO L225 Difference]: With dead ends: 220 [2018-12-03 16:13:03,736 INFO L226 Difference]: Without dead ends: 218 [2018-12-03 16:13:03,737 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6972 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=7267, Invalid=8989, Unknown=0, NotChecked=0, Total=16256 [2018-12-03 16:13:03,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-12-03 16:13:03,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 214. [2018-12-03 16:13:03,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-12-03 16:13:03,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 298 transitions. [2018-12-03 16:13:03,743 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 298 transitions. Word has length 208 [2018-12-03 16:13:03,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:13:03,744 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 298 transitions. [2018-12-03 16:13:03,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-12-03 16:13:03,744 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 298 transitions. [2018-12-03 16:13:03,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-12-03 16:13:03,745 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:13:03,745 INFO L402 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1] [2018-12-03 16:13:03,745 INFO L423 AbstractCegarLoop]: === Iteration 44 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:13:03,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:13:03,745 INFO L82 PathProgramCache]: Analyzing trace with hash 970299968, now seen corresponding path program 42 times [2018-12-03 16:13:03,745 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:13:03,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:03,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:13:03,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:03,746 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:13:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:13:04,693 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 16:13:04,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:04,693 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:13:04,693 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:13:04,694 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:13:04,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:04,694 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:13:04,703 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:13:04,703 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:13:04,758 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:13:04,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:13:04,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:13:06,417 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 16:13:06,418 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:13:08,965 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 16:13:08,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:13:08,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 130 [2018-12-03 16:13:08,984 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:13:08,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-12-03 16:13:08,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-12-03 16:13:08,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7612, Invalid=9418, Unknown=0, NotChecked=0, Total=17030 [2018-12-03 16:13:08,986 INFO L87 Difference]: Start difference. First operand 214 states and 298 transitions. Second operand 88 states. [2018-12-03 16:13:09,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:13:09,483 INFO L93 Difference]: Finished difference Result 225 states and 313 transitions. [2018-12-03 16:13:09,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-12-03 16:13:09,484 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 213 [2018-12-03 16:13:09,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:13:09,485 INFO L225 Difference]: With dead ends: 225 [2018-12-03 16:13:09,485 INFO L226 Difference]: Without dead ends: 223 [2018-12-03 16:13:09,486 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7310 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7612, Invalid=9418, Unknown=0, NotChecked=0, Total=17030 [2018-12-03 16:13:09,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-12-03 16:13:09,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2018-12-03 16:13:09,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-12-03 16:13:09,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 305 transitions. [2018-12-03 16:13:09,491 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 305 transitions. Word has length 213 [2018-12-03 16:13:09,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:13:09,491 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 305 transitions. [2018-12-03 16:13:09,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-12-03 16:13:09,491 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 305 transitions. [2018-12-03 16:13:09,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-12-03 16:13:09,492 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:13:09,493 INFO L402 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1] [2018-12-03 16:13:09,493 INFO L423 AbstractCegarLoop]: === Iteration 45 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:13:09,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:13:09,493 INFO L82 PathProgramCache]: Analyzing trace with hash 106759665, now seen corresponding path program 43 times [2018-12-03 16:13:09,493 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:13:09,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:09,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:13:09,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:09,494 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:13:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:13:10,556 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 16:13:10,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:10,557 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:13:10,557 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:13:10,557 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:13:10,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:10,557 INFO 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 16:13:10,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:13:10,566 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:13:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:13:10,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:13:12,324 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 16:13:12,324 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:13:14,767 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 16:13:14,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:13:14,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 133 [2018-12-03 16:13:14,786 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:13:14,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-12-03 16:13:14,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-12-03 16:13:14,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7965, Invalid=9857, Unknown=0, NotChecked=0, Total=17822 [2018-12-03 16:13:14,788 INFO L87 Difference]: Start difference. First operand 219 states and 305 transitions. Second operand 90 states. [2018-12-03 16:13:15,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:13:15,300 INFO L93 Difference]: Finished difference Result 230 states and 320 transitions. [2018-12-03 16:13:15,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-12-03 16:13:15,300 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 218 [2018-12-03 16:13:15,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:13:15,301 INFO L225 Difference]: With dead ends: 230 [2018-12-03 16:13:15,301 INFO L226 Difference]: Without dead ends: 228 [2018-12-03 16:13:15,302 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7656 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7965, Invalid=9857, Unknown=0, NotChecked=0, Total=17822 [2018-12-03 16:13:15,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-12-03 16:13:15,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2018-12-03 16:13:15,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-12-03 16:13:15,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 312 transitions. [2018-12-03 16:13:15,307 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 312 transitions. Word has length 218 [2018-12-03 16:13:15,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:13:15,307 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 312 transitions. [2018-12-03 16:13:15,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-12-03 16:13:15,307 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 312 transitions. [2018-12-03 16:13:15,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-12-03 16:13:15,308 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:13:15,309 INFO L402 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1] [2018-12-03 16:13:15,309 INFO L423 AbstractCegarLoop]: === Iteration 46 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:13:15,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:13:15,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1161150240, now seen corresponding path program 44 times [2018-12-03 16:13:15,309 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:13:15,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:15,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:13:15,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:15,310 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:13:15,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:13:16,304 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 16:13:16,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:16,304 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:13:16,304 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:13:16,304 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:13:16,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:16,305 INFO 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 16:13:16,314 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:13:16,314 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:13:16,409 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-12-03 16:13:16,410 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:13:16,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:13:18,232 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 16:13:18,232 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:13:20,750 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 16:13:20,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:13:20,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 136 [2018-12-03 16:13:20,769 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:13:20,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-12-03 16:13:20,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-12-03 16:13:20,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8326, Invalid=10306, Unknown=0, NotChecked=0, Total=18632 [2018-12-03 16:13:20,770 INFO L87 Difference]: Start difference. First operand 224 states and 312 transitions. Second operand 92 states. [2018-12-03 16:13:21,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:13:21,367 INFO L93 Difference]: Finished difference Result 235 states and 327 transitions. [2018-12-03 16:13:21,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-12-03 16:13:21,367 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 223 [2018-12-03 16:13:21,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:13:21,368 INFO L225 Difference]: With dead ends: 235 [2018-12-03 16:13:21,368 INFO L226 Difference]: Without dead ends: 233 [2018-12-03 16:13:21,369 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8010 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=8326, Invalid=10306, Unknown=0, NotChecked=0, Total=18632 [2018-12-03 16:13:21,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-12-03 16:13:21,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2018-12-03 16:13:21,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-12-03 16:13:21,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 319 transitions. [2018-12-03 16:13:21,375 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 319 transitions. Word has length 223 [2018-12-03 16:13:21,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:13:21,376 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 319 transitions. [2018-12-03 16:13:21,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-12-03 16:13:21,376 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 319 transitions. [2018-12-03 16:13:21,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-12-03 16:13:21,377 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:13:21,377 INFO L402 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1] [2018-12-03 16:13:21,377 INFO L423 AbstractCegarLoop]: === Iteration 47 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:13:21,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:13:21,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1399292753, now seen corresponding path program 45 times [2018-12-03 16:13:21,377 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:13:21,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:21,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:13:21,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:21,378 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:13:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:13:22,772 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 16:13:22,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:22,773 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:13:22,773 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:13:22,773 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:13:22,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:22,773 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:13:22,784 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:13:22,784 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:13:22,841 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:13:22,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:13:22,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:13:24,505 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 16:13:24,506 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:13:27,227 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 16:13:27,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:13:27,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 139 [2018-12-03 16:13:27,247 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:13:27,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-12-03 16:13:27,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-12-03 16:13:27,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8695, Invalid=10765, Unknown=0, NotChecked=0, Total=19460 [2018-12-03 16:13:27,249 INFO L87 Difference]: Start difference. First operand 229 states and 319 transitions. Second operand 94 states. [2018-12-03 16:13:27,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:13:27,874 INFO L93 Difference]: Finished difference Result 240 states and 334 transitions. [2018-12-03 16:13:27,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-12-03 16:13:27,874 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 228 [2018-12-03 16:13:27,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:13:27,875 INFO L225 Difference]: With dead ends: 240 [2018-12-03 16:13:27,875 INFO L226 Difference]: Without dead ends: 238 [2018-12-03 16:13:27,876 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8372 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8695, Invalid=10765, Unknown=0, NotChecked=0, Total=19460 [2018-12-03 16:13:27,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-12-03 16:13:27,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2018-12-03 16:13:27,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-12-03 16:13:27,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 326 transitions. [2018-12-03 16:13:27,884 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 326 transitions. Word has length 228 [2018-12-03 16:13:27,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:13:27,884 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 326 transitions. [2018-12-03 16:13:27,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-12-03 16:13:27,884 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 326 transitions. [2018-12-03 16:13:27,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-12-03 16:13:27,886 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:13:27,886 INFO L402 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1] [2018-12-03 16:13:27,886 INFO L423 AbstractCegarLoop]: === Iteration 48 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:13:27,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:13:27,886 INFO L82 PathProgramCache]: Analyzing trace with hash -174645376, now seen corresponding path program 46 times [2018-12-03 16:13:27,887 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:13:27,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:27,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:13:27,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:27,887 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:13:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:13:29,377 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 16:13:29,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:29,377 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:13:29,378 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:13:29,378 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:13:29,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:29,378 INFO 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 16:13:29,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:13:29,386 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:13:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:13:29,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:13:31,489 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 16:13:31,489 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:13:34,569 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 16:13:34,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:13:34,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 142 [2018-12-03 16:13:34,588 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:13:34,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-12-03 16:13:34,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-12-03 16:13:34,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9072, Invalid=11234, Unknown=0, NotChecked=0, Total=20306 [2018-12-03 16:13:34,590 INFO L87 Difference]: Start difference. First operand 234 states and 326 transitions. Second operand 96 states. [2018-12-03 16:13:35,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:13:35,261 INFO L93 Difference]: Finished difference Result 245 states and 341 transitions. [2018-12-03 16:13:35,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-12-03 16:13:35,261 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 233 [2018-12-03 16:13:35,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:13:35,262 INFO L225 Difference]: With dead ends: 245 [2018-12-03 16:13:35,262 INFO L226 Difference]: Without dead ends: 243 [2018-12-03 16:13:35,264 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8742 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=9072, Invalid=11234, Unknown=0, NotChecked=0, Total=20306 [2018-12-03 16:13:35,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-12-03 16:13:35,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2018-12-03 16:13:35,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-12-03 16:13:35,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 333 transitions. [2018-12-03 16:13:35,271 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 333 transitions. Word has length 233 [2018-12-03 16:13:35,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:13:35,272 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 333 transitions. [2018-12-03 16:13:35,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-12-03 16:13:35,272 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 333 transitions. [2018-12-03 16:13:35,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-12-03 16:13:35,273 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:13:35,273 INFO L402 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1] [2018-12-03 16:13:35,273 INFO L423 AbstractCegarLoop]: === Iteration 49 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:13:35,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:13:35,274 INFO L82 PathProgramCache]: Analyzing trace with hash -587413327, now seen corresponding path program 47 times [2018-12-03 16:13:35,274 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:13:35,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:35,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:13:35,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:35,275 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:13:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:13:36,393 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 16:13:36,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:36,394 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:13:36,394 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:13:36,394 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:13:36,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:36,394 INFO 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 16:13:36,403 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:13:36,403 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:13:36,505 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-12-03 16:13:36,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:13:36,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:13:38,560 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 16:13:38,560 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:13:41,412 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 16:13:41,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:13:41,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 145 [2018-12-03 16:13:41,431 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:13:41,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-12-03 16:13:41,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-12-03 16:13:41,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9457, Invalid=11713, Unknown=0, NotChecked=0, Total=21170 [2018-12-03 16:13:41,434 INFO L87 Difference]: Start difference. First operand 239 states and 333 transitions. Second operand 98 states. [2018-12-03 16:13:42,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:13:42,141 INFO L93 Difference]: Finished difference Result 250 states and 348 transitions. [2018-12-03 16:13:42,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-12-03 16:13:42,141 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 238 [2018-12-03 16:13:42,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:13:42,142 INFO L225 Difference]: With dead ends: 250 [2018-12-03 16:13:42,143 INFO L226 Difference]: Without dead ends: 248 [2018-12-03 16:13:42,144 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9120 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=9457, Invalid=11713, Unknown=0, NotChecked=0, Total=21170 [2018-12-03 16:13:42,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-12-03 16:13:42,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2018-12-03 16:13:42,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-12-03 16:13:42,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 340 transitions. [2018-12-03 16:13:42,152 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 340 transitions. Word has length 238 [2018-12-03 16:13:42,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:13:42,152 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 340 transitions. [2018-12-03 16:13:42,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-12-03 16:13:42,152 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 340 transitions. [2018-12-03 16:13:42,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-12-03 16:13:42,153 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:13:42,154 INFO L402 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1] [2018-12-03 16:13:42,154 INFO L423 AbstractCegarLoop]: === Iteration 50 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:13:42,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:13:42,154 INFO L82 PathProgramCache]: Analyzing trace with hash -2091502048, now seen corresponding path program 48 times [2018-12-03 16:13:42,154 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:13:42,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:42,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:13:42,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:42,155 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:13:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:13:43,554 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 16:13:43,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:43,554 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:13:43,554 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:13:43,554 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:13:43,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:43,554 INFO 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 16:13:43,566 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:13:43,566 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:13:43,625 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:13:43,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:13:43,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:13:45,480 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 16:13:45,481 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:13:48,690 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 16:13:48,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:13:48,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 148 [2018-12-03 16:13:48,709 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:13:48,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-12-03 16:13:48,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-12-03 16:13:48,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9850, Invalid=12202, Unknown=0, NotChecked=0, Total=22052 [2018-12-03 16:13:48,711 INFO L87 Difference]: Start difference. First operand 244 states and 340 transitions. Second operand 100 states. [2018-12-03 16:13:49,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:13:49,382 INFO L93 Difference]: Finished difference Result 255 states and 355 transitions. [2018-12-03 16:13:49,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-12-03 16:13:49,382 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 243 [2018-12-03 16:13:49,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:13:49,384 INFO L225 Difference]: With dead ends: 255 [2018-12-03 16:13:49,384 INFO L226 Difference]: Without dead ends: 253 [2018-12-03 16:13:49,384 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9506 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9850, Invalid=12202, Unknown=0, NotChecked=0, Total=22052 [2018-12-03 16:13:49,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-12-03 16:13:49,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2018-12-03 16:13:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-12-03 16:13:49,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 347 transitions. [2018-12-03 16:13:49,390 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 347 transitions. Word has length 243 [2018-12-03 16:13:49,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:13:49,391 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 347 transitions. [2018-12-03 16:13:49,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-12-03 16:13:49,391 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 347 transitions. [2018-12-03 16:13:49,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-12-03 16:13:49,392 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:13:49,392 INFO L402 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1] [2018-12-03 16:13:49,392 INFO L423 AbstractCegarLoop]: === Iteration 51 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:13:49,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:13:49,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1438460399, now seen corresponding path program 49 times [2018-12-03 16:13:49,393 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:13:49,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:49,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:13:49,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:49,394 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:13:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:13:51,041 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 16:13:51,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:51,041 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:13:51,042 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:13:51,042 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:13:51,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:51,042 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:13:51,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:13:51,051 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:13:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:13:51,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:13:53,289 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 16:13:53,289 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:13:56,369 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 16:13:56,387 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:13:56,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 151 [2018-12-03 16:13:56,388 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:13:56,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-12-03 16:13:56,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-12-03 16:13:56,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10251, Invalid=12701, Unknown=0, NotChecked=0, Total=22952 [2018-12-03 16:13:56,390 INFO L87 Difference]: Start difference. First operand 249 states and 347 transitions. Second operand 102 states. [2018-12-03 16:13:57,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:13:57,434 INFO L93 Difference]: Finished difference Result 260 states and 362 transitions. [2018-12-03 16:13:57,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-12-03 16:13:57,435 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 248 [2018-12-03 16:13:57,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:13:57,436 INFO L225 Difference]: With dead ends: 260 [2018-12-03 16:13:57,437 INFO L226 Difference]: Without dead ends: 258 [2018-12-03 16:13:57,438 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9900 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=10251, Invalid=12701, Unknown=0, NotChecked=0, Total=22952 [2018-12-03 16:13:57,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-12-03 16:13:57,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 254. [2018-12-03 16:13:57,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-12-03 16:13:57,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 354 transitions. [2018-12-03 16:13:57,447 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 354 transitions. Word has length 248 [2018-12-03 16:13:57,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:13:57,447 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 354 transitions. [2018-12-03 16:13:57,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-12-03 16:13:57,447 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 354 transitions. [2018-12-03 16:13:57,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-12-03 16:13:57,448 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:13:57,449 INFO L402 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1] [2018-12-03 16:13:57,449 INFO L423 AbstractCegarLoop]: === Iteration 52 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:13:57,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:13:57,449 INFO L82 PathProgramCache]: Analyzing trace with hash -459176768, now seen corresponding path program 50 times [2018-12-03 16:13:57,449 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:13:57,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:57,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:13:57,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:13:57,450 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:13:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:13:59,050 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 16:13:59,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:59,051 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:13:59,051 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:13:59,051 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:13:59,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:13:59,051 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 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 16:13:59,077 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:13:59,077 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:13:59,193 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-12-03 16:13:59,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:13:59,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:14:01,217 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 16:14:01,217 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:14:04,692 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 16:14:04,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:14:04,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 154 [2018-12-03 16:14:04,711 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:14:04,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-12-03 16:14:04,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-12-03 16:14:04,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10660, Invalid=13210, Unknown=0, NotChecked=0, Total=23870 [2018-12-03 16:14:04,714 INFO L87 Difference]: Start difference. First operand 254 states and 354 transitions. Second operand 104 states. [2018-12-03 16:14:05,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:14:05,480 INFO L93 Difference]: Finished difference Result 265 states and 369 transitions. [2018-12-03 16:14:05,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-12-03 16:14:05,480 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 253 [2018-12-03 16:14:05,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:14:05,481 INFO L225 Difference]: With dead ends: 265 [2018-12-03 16:14:05,481 INFO L226 Difference]: Without dead ends: 263 [2018-12-03 16:14:05,482 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10302 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=10660, Invalid=13210, Unknown=0, NotChecked=0, Total=23870 [2018-12-03 16:14:05,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-12-03 16:14:05,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 259. [2018-12-03 16:14:05,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-12-03 16:14:05,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 361 transitions. [2018-12-03 16:14:05,490 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 361 transitions. Word has length 253 [2018-12-03 16:14:05,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:14:05,490 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 361 transitions. [2018-12-03 16:14:05,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-12-03 16:14:05,490 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 361 transitions. [2018-12-03 16:14:05,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-12-03 16:14:05,492 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:14:05,492 INFO L402 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1] [2018-12-03 16:14:05,492 INFO L423 AbstractCegarLoop]: === Iteration 53 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:14:05,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:14:05,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1965053071, now seen corresponding path program 51 times [2018-12-03 16:14:05,492 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:14:05,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:05,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:14:05,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:05,493 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:14:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:14:06,811 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 16:14:06,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:14:06,812 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:14:06,812 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:14:06,812 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:14:06,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:14:06,812 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:14:06,822 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:14:06,823 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:14:06,886 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:14:06,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:14:06,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:14:09,305 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 16:14:09,305 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:14:12,595 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 16:14:12,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:14:12,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 157 [2018-12-03 16:14:12,614 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:14:12,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-12-03 16:14:12,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-12-03 16:14:12,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11077, Invalid=13729, Unknown=0, NotChecked=0, Total=24806 [2018-12-03 16:14:12,617 INFO L87 Difference]: Start difference. First operand 259 states and 361 transitions. Second operand 106 states. [2018-12-03 16:14:13,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:14:13,441 INFO L93 Difference]: Finished difference Result 270 states and 376 transitions. [2018-12-03 16:14:13,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-12-03 16:14:13,441 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 258 [2018-12-03 16:14:13,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:14:13,443 INFO L225 Difference]: With dead ends: 270 [2018-12-03 16:14:13,443 INFO L226 Difference]: Without dead ends: 268 [2018-12-03 16:14:13,444 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10712 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=11077, Invalid=13729, Unknown=0, NotChecked=0, Total=24806 [2018-12-03 16:14:13,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-12-03 16:14:13,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2018-12-03 16:14:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-12-03 16:14:13,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 368 transitions. [2018-12-03 16:14:13,449 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 368 transitions. Word has length 258 [2018-12-03 16:14:13,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:14:13,450 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 368 transitions. [2018-12-03 16:14:13,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-12-03 16:14:13,450 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 368 transitions. [2018-12-03 16:14:13,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-12-03 16:14:13,452 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:14:13,453 INFO L402 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1] [2018-12-03 16:14:13,453 INFO L423 AbstractCegarLoop]: === Iteration 54 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:14:13,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:14:13,453 INFO L82 PathProgramCache]: Analyzing trace with hash 563284832, now seen corresponding path program 52 times [2018-12-03 16:14:13,453 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:14:13,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:13,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:14:13,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:13,454 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:14:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:14:14,768 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 16:14:14,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:14:14,769 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:14:14,769 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:14:14,769 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:14:14,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:14:14,769 INFO 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 16:14:14,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:14:14,778 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:14:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:14:14,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:14:16,998 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 16:14:16,999 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:14:20,740 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 16:14:20,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:14:20,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 160 [2018-12-03 16:14:20,759 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:14:20,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-12-03 16:14:20,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-12-03 16:14:20,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11502, Invalid=14258, Unknown=0, NotChecked=0, Total=25760 [2018-12-03 16:14:20,761 INFO L87 Difference]: Start difference. First operand 264 states and 368 transitions. Second operand 108 states. [2018-12-03 16:14:21,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:14:21,605 INFO L93 Difference]: Finished difference Result 275 states and 383 transitions. [2018-12-03 16:14:21,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-12-03 16:14:21,606 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 263 [2018-12-03 16:14:21,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:14:21,607 INFO L225 Difference]: With dead ends: 275 [2018-12-03 16:14:21,607 INFO L226 Difference]: Without dead ends: 273 [2018-12-03 16:14:21,608 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11130 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=11502, Invalid=14258, Unknown=0, NotChecked=0, Total=25760 [2018-12-03 16:14:21,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-12-03 16:14:21,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 269. [2018-12-03 16:14:21,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-12-03 16:14:21,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 375 transitions. [2018-12-03 16:14:21,614 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 375 transitions. Word has length 263 [2018-12-03 16:14:21,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:14:21,614 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 375 transitions. [2018-12-03 16:14:21,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-12-03 16:14:21,614 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 375 transitions. [2018-12-03 16:14:21,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-12-03 16:14:21,615 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:14:21,615 INFO L402 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1] [2018-12-03 16:14:21,615 INFO L423 AbstractCegarLoop]: === Iteration 55 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:14:21,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:14:21,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1996048593, now seen corresponding path program 53 times [2018-12-03 16:14:21,616 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:14:21,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:21,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:14:21,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:21,616 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:14:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:14:23,009 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 16:14:23,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:14:23,010 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:14:23,010 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:14:23,010 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:14:23,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:14:23,010 INFO 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 16:14:23,019 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:14:23,019 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:14:23,140 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-12-03 16:14:23,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:14:23,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:14:25,563 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 16:14:25,563 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:14:29,444 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 16:14:29,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:14:29,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 163 [2018-12-03 16:14:29,463 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:14:29,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-12-03 16:14:29,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-12-03 16:14:29,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11935, Invalid=14797, Unknown=0, NotChecked=0, Total=26732 [2018-12-03 16:14:29,466 INFO L87 Difference]: Start difference. First operand 269 states and 375 transitions. Second operand 110 states. [2018-12-03 16:14:30,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:14:30,427 INFO L93 Difference]: Finished difference Result 280 states and 390 transitions. [2018-12-03 16:14:30,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-12-03 16:14:30,427 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 268 [2018-12-03 16:14:30,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:14:30,429 INFO L225 Difference]: With dead ends: 280 [2018-12-03 16:14:30,429 INFO L226 Difference]: Without dead ends: 278 [2018-12-03 16:14:30,430 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11556 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=11935, Invalid=14797, Unknown=0, NotChecked=0, Total=26732 [2018-12-03 16:14:30,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-12-03 16:14:30,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 274. [2018-12-03 16:14:30,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-12-03 16:14:30,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 382 transitions. [2018-12-03 16:14:30,439 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 382 transitions. Word has length 268 [2018-12-03 16:14:30,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:14:30,439 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 382 transitions. [2018-12-03 16:14:30,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-12-03 16:14:30,439 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 382 transitions. [2018-12-03 16:14:30,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-12-03 16:14:30,441 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:14:30,441 INFO L402 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1] [2018-12-03 16:14:30,441 INFO L423 AbstractCegarLoop]: === Iteration 56 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:14:30,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:14:30,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1774504448, now seen corresponding path program 54 times [2018-12-03 16:14:30,442 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:14:30,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:30,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:14:30,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:30,443 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:14:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:14:32,107 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 16:14:32,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:14:32,107 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:14:32,107 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:14:32,107 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:14:32,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:14:32,107 INFO 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 16:14:32,116 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:14:32,117 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:14:32,183 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:14:32,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:14:32,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:14:34,731 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 16:14:34,732 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:14:38,403 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 16:14:38,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:14:38,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 166 [2018-12-03 16:14:38,422 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:14:38,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-12-03 16:14:38,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-12-03 16:14:38,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12376, Invalid=15346, Unknown=0, NotChecked=0, Total=27722 [2018-12-03 16:14:38,425 INFO L87 Difference]: Start difference. First operand 274 states and 382 transitions. Second operand 112 states. [2018-12-03 16:14:39,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:14:39,506 INFO L93 Difference]: Finished difference Result 285 states and 397 transitions. [2018-12-03 16:14:39,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-12-03 16:14:39,506 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 273 [2018-12-03 16:14:39,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:14:39,507 INFO L225 Difference]: With dead ends: 285 [2018-12-03 16:14:39,507 INFO L226 Difference]: Without dead ends: 283 [2018-12-03 16:14:39,508 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11990 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=12376, Invalid=15346, Unknown=0, NotChecked=0, Total=27722 [2018-12-03 16:14:39,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-12-03 16:14:39,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 279. [2018-12-03 16:14:39,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-12-03 16:14:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 389 transitions. [2018-12-03 16:14:39,516 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 389 transitions. Word has length 273 [2018-12-03 16:14:39,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:14:39,517 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 389 transitions. [2018-12-03 16:14:39,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-12-03 16:14:39,517 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 389 transitions. [2018-12-03 16:14:39,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-12-03 16:14:39,518 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:14:39,518 INFO L402 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1] [2018-12-03 16:14:39,519 INFO L423 AbstractCegarLoop]: === Iteration 57 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:14:39,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:14:39,519 INFO L82 PathProgramCache]: Analyzing trace with hash -281694671, now seen corresponding path program 55 times [2018-12-03 16:14:39,519 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:14:39,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:39,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:14:39,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:39,520 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:14:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:14:41,133 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 16:14:41,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:14:41,134 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:14:41,134 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:14:41,134 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:14:41,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:14:41,134 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 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 16:14:41,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:14:41,143 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:14:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:14:41,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:14:43,658 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 16:14:43,659 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:14:47,766 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 16:14:47,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:14:47,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 169 [2018-12-03 16:14:47,785 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:14:47,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-12-03 16:14:47,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-12-03 16:14:47,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12825, Invalid=15905, Unknown=0, NotChecked=0, Total=28730 [2018-12-03 16:14:47,787 INFO L87 Difference]: Start difference. First operand 279 states and 389 transitions. Second operand 114 states. [2018-12-03 16:14:48,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:14:48,701 INFO L93 Difference]: Finished difference Result 290 states and 404 transitions. [2018-12-03 16:14:48,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-12-03 16:14:48,701 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 278 [2018-12-03 16:14:48,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:14:48,702 INFO L225 Difference]: With dead ends: 290 [2018-12-03 16:14:48,702 INFO L226 Difference]: Without dead ends: 288 [2018-12-03 16:14:48,703 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12432 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=12825, Invalid=15905, Unknown=0, NotChecked=0, Total=28730 [2018-12-03 16:14:48,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-12-03 16:14:48,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 284. [2018-12-03 16:14:48,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-12-03 16:14:48,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 396 transitions. [2018-12-03 16:14:48,709 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 396 transitions. Word has length 278 [2018-12-03 16:14:48,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:14:48,709 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 396 transitions. [2018-12-03 16:14:48,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-12-03 16:14:48,709 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 396 transitions. [2018-12-03 16:14:48,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-12-03 16:14:48,710 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:14:48,710 INFO L402 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1] [2018-12-03 16:14:48,710 INFO L423 AbstractCegarLoop]: === Iteration 58 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:14:48,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:14:48,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1269776224, now seen corresponding path program 56 times [2018-12-03 16:14:48,711 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:14:48,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:48,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:14:48,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:48,711 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:14:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:14:50,570 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 16:14:50,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:14:50,570 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:14:50,570 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:14:50,570 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:14:50,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:14:50,571 INFO 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 16:14:50,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:14:50,579 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:14:50,724 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-12-03 16:14:50,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:14:50,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:14:53,195 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 16:14:53,195 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:14:57,328 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 16:14:57,346 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:14:57,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 170 [2018-12-03 16:14:57,347 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:14:57,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-12-03 16:14:57,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-12-03 16:14:57,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12939, Invalid=16131, Unknown=0, NotChecked=0, Total=29070 [2018-12-03 16:14:57,349 INFO L87 Difference]: Start difference. First operand 284 states and 396 transitions. Second operand 116 states. [2018-12-03 16:14:58,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:14:58,402 INFO L93 Difference]: Finished difference Result 295 states and 411 transitions. [2018-12-03 16:14:58,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-12-03 16:14:58,402 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 283 [2018-12-03 16:14:58,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:14:58,403 INFO L225 Difference]: With dead ends: 295 [2018-12-03 16:14:58,403 INFO L226 Difference]: Without dead ends: 293 [2018-12-03 16:14:58,404 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 451 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12989 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=12939, Invalid=16131, Unknown=0, NotChecked=0, Total=29070 [2018-12-03 16:14:58,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-12-03 16:14:58,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 289. [2018-12-03 16:14:58,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-12-03 16:14:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 403 transitions. [2018-12-03 16:14:58,410 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 403 transitions. Word has length 283 [2018-12-03 16:14:58,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:14:58,410 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 403 transitions. [2018-12-03 16:14:58,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-12-03 16:14:58,410 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 403 transitions. [2018-12-03 16:14:58,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-12-03 16:14:58,411 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:14:58,411 INFO L402 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1] [2018-12-03 16:14:58,412 INFO L423 AbstractCegarLoop]: === Iteration 59 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:14:58,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:14:58,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1555749777, now seen corresponding path program 57 times [2018-12-03 16:14:58,412 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:14:58,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:58,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:14:58,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:14:58,413 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:14:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:15:00,630 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 16:15:00,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:15:00,631 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:15:00,631 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:15:00,631 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:15:00,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:15:00,631 INFO 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 16:15:00,639 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:15:00,639 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:15:00,709 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:15:00,709 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:15:00,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:15:03,351 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 16:15:03,351 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:15:07,541 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 16:15:07,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:15:07,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 171 [2018-12-03 16:15:07,560 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:15:07,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-12-03 16:15:07,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-12-03 16:15:07,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13053, Invalid=16359, Unknown=0, NotChecked=0, Total=29412 [2018-12-03 16:15:07,563 INFO L87 Difference]: Start difference. First operand 289 states and 403 transitions. Second operand 118 states. [2018-12-03 16:15:08,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:15:08,615 INFO L93 Difference]: Finished difference Result 300 states and 418 transitions. [2018-12-03 16:15:08,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-12-03 16:15:08,615 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 288 [2018-12-03 16:15:08,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:15:08,616 INFO L225 Difference]: With dead ends: 300 [2018-12-03 16:15:08,616 INFO L226 Difference]: Without dead ends: 298 [2018-12-03 16:15:08,617 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 459 SyntacticMatches, 4 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13546 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=13053, Invalid=16359, Unknown=0, NotChecked=0, Total=29412 [2018-12-03 16:15:08,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-12-03 16:15:08,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2018-12-03 16:15:08,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-12-03 16:15:08,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 410 transitions. [2018-12-03 16:15:08,625 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 410 transitions. Word has length 288 [2018-12-03 16:15:08,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:15:08,625 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 410 transitions. [2018-12-03 16:15:08,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-12-03 16:15:08,625 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 410 transitions. [2018-12-03 16:15:08,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-12-03 16:15:08,627 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:15:08,627 INFO L402 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1] [2018-12-03 16:15:08,627 INFO L423 AbstractCegarLoop]: === Iteration 60 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:15:08,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:15:08,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1607528256, now seen corresponding path program 58 times [2018-12-03 16:15:08,628 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:15:08,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:15:08,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:15:08,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:15:08,629 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:15:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:15:10,588 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 16:15:10,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:15:10,589 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:15:10,589 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:15:10,589 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:15:10,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:15:10,589 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 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 16:15:10,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:15:10,600 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:15:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:15:10,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:15:13,474 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 16:15:13,475 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:15:17,813 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 16:15:17,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:15:17,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 172 [2018-12-03 16:15:17,832 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:15:17,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-12-03 16:15:17,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-12-03 16:15:17,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13167, Invalid=16589, Unknown=0, NotChecked=0, Total=29756 [2018-12-03 16:15:17,834 INFO L87 Difference]: Start difference. First operand 294 states and 410 transitions. Second operand 120 states. [2018-12-03 16:15:18,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:15:18,850 INFO L93 Difference]: Finished difference Result 305 states and 425 transitions. [2018-12-03 16:15:18,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-12-03 16:15:18,851 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 293 [2018-12-03 16:15:18,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:15:18,852 INFO L225 Difference]: With dead ends: 305 [2018-12-03 16:15:18,852 INFO L226 Difference]: Without dead ends: 303 [2018-12-03 16:15:18,853 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 467 SyntacticMatches, 6 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14103 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=13167, Invalid=16589, Unknown=0, NotChecked=0, Total=29756 [2018-12-03 16:15:18,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-12-03 16:15:18,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 299. [2018-12-03 16:15:18,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-12-03 16:15:18,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 417 transitions. [2018-12-03 16:15:18,861 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 417 transitions. Word has length 293 [2018-12-03 16:15:18,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:15:18,861 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 417 transitions. [2018-12-03 16:15:18,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-12-03 16:15:18,861 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 417 transitions. [2018-12-03 16:15:18,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-12-03 16:15:18,863 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:15:18,863 INFO L402 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1] [2018-12-03 16:15:18,863 INFO L423 AbstractCegarLoop]: === Iteration 61 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:15:18,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:15:18,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1898893553, now seen corresponding path program 59 times [2018-12-03 16:15:18,864 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:15:18,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:15:18,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:15:18,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:15:18,864 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:15:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:15:20,807 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 16:15:20,807 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:15:20,807 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:15:20,807 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:15:20,808 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:15:20,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:15:20,808 INFO 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 16:15:20,816 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:15:20,816 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:15:20,950 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-12-03 16:15:20,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:15:20,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:15:23,697 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 16:15:23,698 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:15:27,859 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 16:15:27,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:15:27,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 173 [2018-12-03 16:15:27,878 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:15:27,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-12-03 16:15:27,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-12-03 16:15:27,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13281, Invalid=16821, Unknown=0, NotChecked=0, Total=30102 [2018-12-03 16:15:27,880 INFO L87 Difference]: Start difference. First operand 299 states and 417 transitions. Second operand 122 states. [2018-12-03 16:15:28,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:15:28,943 INFO L93 Difference]: Finished difference Result 310 states and 432 transitions. [2018-12-03 16:15:28,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-12-03 16:15:28,944 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 298 [2018-12-03 16:15:28,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:15:28,945 INFO L225 Difference]: With dead ends: 310 [2018-12-03 16:15:28,945 INFO L226 Difference]: Without dead ends: 308 [2018-12-03 16:15:28,946 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 475 SyntacticMatches, 8 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14660 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=13281, Invalid=16821, Unknown=0, NotChecked=0, Total=30102 [2018-12-03 16:15:28,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-12-03 16:15:28,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 304. [2018-12-03 16:15:28,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-12-03 16:15:28,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 424 transitions. [2018-12-03 16:15:28,951 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 424 transitions. Word has length 298 [2018-12-03 16:15:28,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:15:28,952 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 424 transitions. [2018-12-03 16:15:28,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-12-03 16:15:28,952 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 424 transitions. [2018-12-03 16:15:28,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-12-03 16:15:28,953 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:15:28,953 INFO L402 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 1, 1, 1] [2018-12-03 16:15:28,953 INFO L423 AbstractCegarLoop]: === Iteration 62 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:15:28,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:15:28,953 INFO L82 PathProgramCache]: Analyzing trace with hash -765504032, now seen corresponding path program 60 times [2018-12-03 16:15:28,954 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:15:28,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:15:28,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:15:28,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:15:28,954 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:15:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:15:30,924 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 16:15:30,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:15:30,924 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:15:30,925 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:15:30,925 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:15:30,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:15:30,925 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:15:30,933 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:15:30,933 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:15:31,010 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:15:31,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:15:31,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:15:33,876 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 16:15:33,876 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:15:38,200 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 16:15:38,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:15:38,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 174 [2018-12-03 16:15:38,220 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:15:38,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-12-03 16:15:38,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-12-03 16:15:38,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13395, Invalid=17055, Unknown=0, NotChecked=0, Total=30450 [2018-12-03 16:15:38,222 INFO L87 Difference]: Start difference. First operand 304 states and 424 transitions. Second operand 124 states. [2018-12-03 16:15:39,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:15:39,422 INFO L93 Difference]: Finished difference Result 315 states and 439 transitions. [2018-12-03 16:15:39,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-12-03 16:15:39,423 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 303 [2018-12-03 16:15:39,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:15:39,424 INFO L225 Difference]: With dead ends: 315 [2018-12-03 16:15:39,424 INFO L226 Difference]: Without dead ends: 313 [2018-12-03 16:15:39,425 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 483 SyntacticMatches, 10 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15217 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=13395, Invalid=17055, Unknown=0, NotChecked=0, Total=30450 [2018-12-03 16:15:39,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-12-03 16:15:39,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 309. [2018-12-03 16:15:39,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-12-03 16:15:39,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 431 transitions. [2018-12-03 16:15:39,430 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 431 transitions. Word has length 303 [2018-12-03 16:15:39,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:15:39,431 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 431 transitions. [2018-12-03 16:15:39,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-12-03 16:15:39,431 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 431 transitions. [2018-12-03 16:15:39,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-12-03 16:15:39,432 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:15:39,432 INFO L402 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 1, 1, 1] [2018-12-03 16:15:39,432 INFO L423 AbstractCegarLoop]: === Iteration 63 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:15:39,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:15:39,433 INFO L82 PathProgramCache]: Analyzing trace with hash -2034790831, now seen corresponding path program 61 times [2018-12-03 16:15:39,433 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:15:39,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:15:39,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:15:39,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:15:39,433 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:15:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:15:41,423 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 16:15:41,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:15:41,424 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:15:41,424 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:15:41,424 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:15:41,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:15:41,424 INFO 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 16:15:41,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:15:41,433 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:15:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:15:41,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:15:44,423 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 16:15:44,423 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:15:48,798 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 16:15:48,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:15:48,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 175 [2018-12-03 16:15:48,817 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:15:48,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-12-03 16:15:48,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-12-03 16:15:48,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13509, Invalid=17291, Unknown=0, NotChecked=0, Total=30800 [2018-12-03 16:15:48,820 INFO L87 Difference]: Start difference. First operand 309 states and 431 transitions. Second operand 126 states. [2018-12-03 16:15:50,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:15:50,036 INFO L93 Difference]: Finished difference Result 320 states and 446 transitions. [2018-12-03 16:15:50,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-12-03 16:15:50,036 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 308 [2018-12-03 16:15:50,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:15:50,037 INFO L225 Difference]: With dead ends: 320 [2018-12-03 16:15:50,037 INFO L226 Difference]: Without dead ends: 318 [2018-12-03 16:15:50,038 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 491 SyntacticMatches, 12 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15774 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=13509, Invalid=17291, Unknown=0, NotChecked=0, Total=30800 [2018-12-03 16:15:50,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-12-03 16:15:50,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 314. [2018-12-03 16:15:50,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-12-03 16:15:50,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 438 transitions. [2018-12-03 16:15:50,047 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 438 transitions. Word has length 308 [2018-12-03 16:15:50,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:15:50,048 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 438 transitions. [2018-12-03 16:15:50,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-12-03 16:15:50,048 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 438 transitions. [2018-12-03 16:15:50,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-12-03 16:15:50,049 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:15:50,049 INFO L402 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1] [2018-12-03 16:15:50,050 INFO L423 AbstractCegarLoop]: === Iteration 64 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:15:50,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:15:50,050 INFO L82 PathProgramCache]: Analyzing trace with hash 429257856, now seen corresponding path program 62 times [2018-12-03 16:15:50,050 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:15:50,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:15:50,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:15:50,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:15:50,051 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:15:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:15:52,187 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 16:15:52,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:15:52,188 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:15:52,188 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:15:52,188 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:15:52,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:15:52,188 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:15:52,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:15:52,197 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:15:52,349 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-12-03 16:15:52,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:15:52,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:15:55,361 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 16:15:55,362 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:15:59,881 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 16:15:59,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:15:59,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 176 [2018-12-03 16:15:59,901 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:15:59,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-12-03 16:15:59,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-12-03 16:15:59,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13623, Invalid=17529, Unknown=0, NotChecked=0, Total=31152 [2018-12-03 16:15:59,904 INFO L87 Difference]: Start difference. First operand 314 states and 438 transitions. Second operand 128 states. [2018-12-03 16:16:01,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:16:01,122 INFO L93 Difference]: Finished difference Result 325 states and 453 transitions. [2018-12-03 16:16:01,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-12-03 16:16:01,122 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 313 [2018-12-03 16:16:01,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:16:01,124 INFO L225 Difference]: With dead ends: 325 [2018-12-03 16:16:01,124 INFO L226 Difference]: Without dead ends: 323 [2018-12-03 16:16:01,125 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 499 SyntacticMatches, 14 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16331 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=13623, Invalid=17529, Unknown=0, NotChecked=0, Total=31152 [2018-12-03 16:16:01,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-12-03 16:16:01,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 319. [2018-12-03 16:16:01,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-03 16:16:01,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 445 transitions. [2018-12-03 16:16:01,131 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 445 transitions. Word has length 313 [2018-12-03 16:16:01,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:16:01,131 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 445 transitions. [2018-12-03 16:16:01,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-12-03 16:16:01,131 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 445 transitions. [2018-12-03 16:16:01,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-12-03 16:16:01,133 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:16:01,133 INFO L402 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1] [2018-12-03 16:16:01,133 INFO L423 AbstractCegarLoop]: === Iteration 65 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:16:01,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:16:01,133 INFO L82 PathProgramCache]: Analyzing trace with hash -322639, now seen corresponding path program 63 times [2018-12-03 16:16:01,133 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:16:01,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:16:01,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:16:01,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:16:01,134 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:16:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:16:03,009 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 16:16:03,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:16:03,009 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:16:03,010 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:16:03,010 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:16:03,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:16:03,010 INFO 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 16:16:03,020 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:16:03,021 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:16:03,098 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:16:03,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:16:03,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:16:06,381 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 16:16:06,382 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:16:10,527 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 16:16:10,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:16:10,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 177 [2018-12-03 16:16:10,546 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:16:10,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-12-03 16:16:10,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-12-03 16:16:10,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13737, Invalid=17769, Unknown=0, NotChecked=0, Total=31506 [2018-12-03 16:16:10,548 INFO L87 Difference]: Start difference. First operand 319 states and 445 transitions. Second operand 130 states. [2018-12-03 16:16:11,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:16:11,740 INFO L93 Difference]: Finished difference Result 330 states and 460 transitions. [2018-12-03 16:16:11,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-12-03 16:16:11,741 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 318 [2018-12-03 16:16:11,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:16:11,742 INFO L225 Difference]: With dead ends: 330 [2018-12-03 16:16:11,742 INFO L226 Difference]: Without dead ends: 328 [2018-12-03 16:16:11,743 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 507 SyntacticMatches, 16 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16888 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=13737, Invalid=17769, Unknown=0, NotChecked=0, Total=31506 [2018-12-03 16:16:11,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-12-03 16:16:11,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2018-12-03 16:16:11,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2018-12-03 16:16:11,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 452 transitions. [2018-12-03 16:16:11,749 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 452 transitions. Word has length 318 [2018-12-03 16:16:11,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:16:11,750 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 452 transitions. [2018-12-03 16:16:11,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-12-03 16:16:11,750 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 452 transitions. [2018-12-03 16:16:11,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2018-12-03 16:16:11,751 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:16:11,751 INFO L402 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 1, 1, 1] [2018-12-03 16:16:11,751 INFO L423 AbstractCegarLoop]: === Iteration 66 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:16:11,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:16:11,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1970353376, now seen corresponding path program 64 times [2018-12-03 16:16:11,752 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:16:11,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:16:11,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:16:11,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:16:11,752 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:16:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:16:13,707 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 16:16:13,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:16:13,707 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:16:13,707 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:16:13,707 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:16:13,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:16:13,708 INFO 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 16:16:13,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:16:13,717 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:16:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:16:13,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:16:17,295 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 16:16:17,295 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:16:21,896 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 16:16:21,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:16:21,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 178 [2018-12-03 16:16:21,915 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:16:21,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-12-03 16:16:21,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-12-03 16:16:21,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13851, Invalid=18011, Unknown=0, NotChecked=0, Total=31862 [2018-12-03 16:16:21,917 INFO L87 Difference]: Start difference. First operand 324 states and 452 transitions. Second operand 132 states. [2018-12-03 16:16:23,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:16:23,260 INFO L93 Difference]: Finished difference Result 335 states and 467 transitions. [2018-12-03 16:16:23,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-12-03 16:16:23,261 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 323 [2018-12-03 16:16:23,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:16:23,262 INFO L225 Difference]: With dead ends: 335 [2018-12-03 16:16:23,262 INFO L226 Difference]: Without dead ends: 333 [2018-12-03 16:16:23,263 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 515 SyntacticMatches, 18 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17445 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=13851, Invalid=18011, Unknown=0, NotChecked=0, Total=31862 [2018-12-03 16:16:23,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2018-12-03 16:16:23,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 329. [2018-12-03 16:16:23,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-12-03 16:16:23,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 459 transitions. [2018-12-03 16:16:23,272 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 459 transitions. Word has length 323 [2018-12-03 16:16:23,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:16:23,272 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 459 transitions. [2018-12-03 16:16:23,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-12-03 16:16:23,272 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 459 transitions. [2018-12-03 16:16:23,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-12-03 16:16:23,274 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:16:23,274 INFO L402 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 1, 1, 1] [2018-12-03 16:16:23,274 INFO L423 AbstractCegarLoop]: === Iteration 67 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:16:23,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:16:23,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1474338543, now seen corresponding path program 65 times [2018-12-03 16:16:23,275 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:16:23,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:16:23,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:16:23,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:16:23,276 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:16:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:16:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10465 backedges. 0 proven. 10465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:16:25,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:16:25,281 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:16:25,281 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:16:25,281 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:16:25,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:16:25,282 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:16:25,290 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:16:25,290 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:16:25,449 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-12-03 16:16:25,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:16:25,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:16:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 10465 backedges. 0 proven. 10465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:16:28,946 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:16:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10465 backedges. 0 proven. 10465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:16:33,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:16:33,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 179 [2018-12-03 16:16:33,551 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:16:33,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-12-03 16:16:33,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-12-03 16:16:33,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13965, Invalid=18255, Unknown=0, NotChecked=0, Total=32220 [2018-12-03 16:16:33,553 INFO L87 Difference]: Start difference. First operand 329 states and 459 transitions. Second operand 134 states. [2018-12-03 16:16:34,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:16:34,870 INFO L93 Difference]: Finished difference Result 340 states and 474 transitions. [2018-12-03 16:16:34,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-12-03 16:16:34,871 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 328 [2018-12-03 16:16:34,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:16:34,872 INFO L225 Difference]: With dead ends: 340 [2018-12-03 16:16:34,872 INFO L226 Difference]: Without dead ends: 338 [2018-12-03 16:16:34,873 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 721 GetRequests, 523 SyntacticMatches, 20 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18002 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=13965, Invalid=18255, Unknown=0, NotChecked=0, Total=32220 [2018-12-03 16:16:34,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-12-03 16:16:34,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 334. [2018-12-03 16:16:34,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2018-12-03 16:16:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 466 transitions. [2018-12-03 16:16:34,882 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 466 transitions. Word has length 328 [2018-12-03 16:16:34,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:16:34,882 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 466 transitions. [2018-12-03 16:16:34,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-12-03 16:16:34,882 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 466 transitions. [2018-12-03 16:16:34,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-12-03 16:16:34,884 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:16:34,884 INFO L402 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 1, 1, 1] [2018-12-03 16:16:34,884 INFO L423 AbstractCegarLoop]: === Iteration 68 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:16:34,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:16:34,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1642322368, now seen corresponding path program 66 times [2018-12-03 16:16:34,885 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:16:34,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:16:34,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:16:34,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:16:34,886 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:16:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:16:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 10791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:16:37,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:16:37,305 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:16:37,305 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:16:37,305 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:16:37,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:16:37,305 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:16:37,337 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:16:37,337 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:16:37,416 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:16:37,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:16:37,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:16:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 10791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:16:40,760 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:16:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 10791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:16:45,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:16:45,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 180 [2018-12-03 16:16:45,315 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:16:45,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-12-03 16:16:45,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-12-03 16:16:45,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14079, Invalid=18501, Unknown=0, NotChecked=0, Total=32580 [2018-12-03 16:16:45,317 INFO L87 Difference]: Start difference. First operand 334 states and 466 transitions. Second operand 136 states. [2018-12-03 16:16:46,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:16:46,773 INFO L93 Difference]: Finished difference Result 345 states and 481 transitions. [2018-12-03 16:16:46,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-12-03 16:16:46,773 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 333 [2018-12-03 16:16:46,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:16:46,775 INFO L225 Difference]: With dead ends: 345 [2018-12-03 16:16:46,775 INFO L226 Difference]: Without dead ends: 343 [2018-12-03 16:16:46,776 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 531 SyntacticMatches, 22 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18559 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=14079, Invalid=18501, Unknown=0, NotChecked=0, Total=32580 [2018-12-03 16:16:46,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-12-03 16:16:46,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 339. [2018-12-03 16:16:46,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-12-03 16:16:46,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 473 transitions. [2018-12-03 16:16:46,782 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 473 transitions. Word has length 333 [2018-12-03 16:16:46,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:16:46,782 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 473 transitions. [2018-12-03 16:16:46,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-12-03 16:16:46,782 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 473 transitions. [2018-12-03 16:16:46,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-12-03 16:16:46,784 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:16:46,784 INFO L402 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 1, 1, 1] [2018-12-03 16:16:46,784 INFO L423 AbstractCegarLoop]: === Iteration 69 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:16:46,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:16:46,784 INFO L82 PathProgramCache]: Analyzing trace with hash 315258481, now seen corresponding path program 67 times [2018-12-03 16:16:46,784 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:16:46,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:16:46,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:16:46,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:16:46,785 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:16:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:16:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11122 backedges. 0 proven. 11122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:16:48,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:16:48,992 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:16:48,992 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:16:48,992 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:16:48,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:16:48,992 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:16:49,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:16:49,000 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:16:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:16:49,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:16:52,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11122 backedges. 0 proven. 11122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:16:52,819 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:16:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11122 backedges. 0 proven. 11122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:16:57,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:16:57,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 181 [2018-12-03 16:16:57,330 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:16:57,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-12-03 16:16:57,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-12-03 16:16:57,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14193, Invalid=18749, Unknown=0, NotChecked=0, Total=32942 [2018-12-03 16:16:57,332 INFO L87 Difference]: Start difference. First operand 339 states and 473 transitions. Second operand 138 states. [2018-12-03 16:16:58,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:16:58,714 INFO L93 Difference]: Finished difference Result 350 states and 488 transitions. [2018-12-03 16:16:58,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-12-03 16:16:58,714 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 338 [2018-12-03 16:16:58,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:16:58,715 INFO L225 Difference]: With dead ends: 350 [2018-12-03 16:16:58,715 INFO L226 Difference]: Without dead ends: 348 [2018-12-03 16:16:58,716 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 539 SyntacticMatches, 24 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19116 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=14193, Invalid=18749, Unknown=0, NotChecked=0, Total=32942 [2018-12-03 16:16:58,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2018-12-03 16:16:58,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2018-12-03 16:16:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2018-12-03 16:16:58,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 480 transitions. [2018-12-03 16:16:58,723 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 480 transitions. Word has length 338 [2018-12-03 16:16:58,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:16:58,723 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 480 transitions. [2018-12-03 16:16:58,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-12-03 16:16:58,723 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 480 transitions. [2018-12-03 16:16:58,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2018-12-03 16:16:58,724 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:16:58,724 INFO L402 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 1, 1, 1] [2018-12-03 16:16:58,725 INFO L423 AbstractCegarLoop]: === Iteration 70 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:16:58,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:16:58,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1672421472, now seen corresponding path program 68 times [2018-12-03 16:16:58,725 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:16:58,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:16:58,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:16:58,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:16:58,726 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:16:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:17:00,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11458 backedges. 0 proven. 11458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:17:00,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:17:00,886 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:17:00,886 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:17:00,886 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:17:00,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:17:00,886 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:17:00,896 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:17:00,896 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:17:01,071 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-12-03 16:17:01,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:17:01,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:17:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11458 backedges. 0 proven. 11458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:17:04,824 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:17:09,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11458 backedges. 0 proven. 11458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:17:09,565 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:17:09,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 182 [2018-12-03 16:17:09,565 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:17:09,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-12-03 16:17:09,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-12-03 16:17:09,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14307, Invalid=18999, Unknown=0, NotChecked=0, Total=33306 [2018-12-03 16:17:09,567 INFO L87 Difference]: Start difference. First operand 344 states and 480 transitions. Second operand 140 states. [2018-12-03 16:17:10,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:17:10,996 INFO L93 Difference]: Finished difference Result 355 states and 495 transitions. [2018-12-03 16:17:10,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-12-03 16:17:10,996 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 343 [2018-12-03 16:17:10,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:17:10,997 INFO L225 Difference]: With dead ends: 355 [2018-12-03 16:17:10,998 INFO L226 Difference]: Without dead ends: 353 [2018-12-03 16:17:10,998 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 547 SyntacticMatches, 26 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19673 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=14307, Invalid=18999, Unknown=0, NotChecked=0, Total=33306 [2018-12-03 16:17:10,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2018-12-03 16:17:11,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 349. [2018-12-03 16:17:11,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2018-12-03 16:17:11,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 487 transitions. [2018-12-03 16:17:11,005 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 487 transitions. Word has length 343 [2018-12-03 16:17:11,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:17:11,005 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 487 transitions. [2018-12-03 16:17:11,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-12-03 16:17:11,005 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 487 transitions. [2018-12-03 16:17:11,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-12-03 16:17:11,006 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:17:11,006 INFO L402 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 1, 1, 1] [2018-12-03 16:17:11,007 INFO L423 AbstractCegarLoop]: === Iteration 71 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:17:11,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:17:11,007 INFO L82 PathProgramCache]: Analyzing trace with hash -64859183, now seen corresponding path program 69 times [2018-12-03 16:17:11,007 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:17:11,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:17:11,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:17:11,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:17:11,008 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:17:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:17:13,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11799 backedges. 0 proven. 11799 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:17:13,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:17:13,531 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:17:13,531 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:17:13,531 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:17:13,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:17:13,532 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:17:13,539 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:17:13,539 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:17:13,621 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:17:13,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:17:13,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:17:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11799 backedges. 0 proven. 11799 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:17:17,282 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:17:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11799 backedges. 0 proven. 11799 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:17:21,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:17:21,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 183 [2018-12-03 16:17:21,897 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:17:21,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-12-03 16:17:21,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-12-03 16:17:21,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14421, Invalid=19251, Unknown=0, NotChecked=0, Total=33672 [2018-12-03 16:17:21,900 INFO L87 Difference]: Start difference. First operand 349 states and 487 transitions. Second operand 142 states. [2018-12-03 16:17:23,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:17:23,383 INFO L93 Difference]: Finished difference Result 360 states and 502 transitions. [2018-12-03 16:17:23,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-12-03 16:17:23,384 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 348 [2018-12-03 16:17:23,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:17:23,385 INFO L225 Difference]: With dead ends: 360 [2018-12-03 16:17:23,385 INFO L226 Difference]: Without dead ends: 358 [2018-12-03 16:17:23,386 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 555 SyntacticMatches, 28 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20230 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=14421, Invalid=19251, Unknown=0, NotChecked=0, Total=33672 [2018-12-03 16:17:23,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2018-12-03 16:17:23,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 354. [2018-12-03 16:17:23,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2018-12-03 16:17:23,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 494 transitions. [2018-12-03 16:17:23,393 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 494 transitions. Word has length 348 [2018-12-03 16:17:23,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:17:23,393 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 494 transitions. [2018-12-03 16:17:23,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-12-03 16:17:23,393 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 494 transitions. [2018-12-03 16:17:23,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2018-12-03 16:17:23,394 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:17:23,394 INFO L402 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 1, 1, 1] [2018-12-03 16:17:23,395 INFO L423 AbstractCegarLoop]: === Iteration 72 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:17:23,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:17:23,395 INFO L82 PathProgramCache]: Analyzing trace with hash 2072682240, now seen corresponding path program 70 times [2018-12-03 16:17:23,395 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:17:23,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:17:23,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:17:23,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:17:23,396 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:17:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:17:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12145 backedges. 0 proven. 12145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:17:25,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:17:25,676 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:17:25,676 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:17:25,677 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:17:25,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:17:25,677 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:17:25,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:17:25,686 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:17:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:17:25,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:17:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12145 backedges. 0 proven. 12145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:17:29,761 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:17:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12145 backedges. 0 proven. 12145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:17:34,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:17:34,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 184 [2018-12-03 16:17:34,554 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:17:34,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-12-03 16:17:34,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-12-03 16:17:34,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14535, Invalid=19505, Unknown=0, NotChecked=0, Total=34040 [2018-12-03 16:17:34,557 INFO L87 Difference]: Start difference. First operand 354 states and 494 transitions. Second operand 144 states. [2018-12-03 16:17:36,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:17:36,170 INFO L93 Difference]: Finished difference Result 365 states and 509 transitions. [2018-12-03 16:17:36,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-12-03 16:17:36,171 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 353 [2018-12-03 16:17:36,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:17:36,172 INFO L225 Difference]: With dead ends: 365 [2018-12-03 16:17:36,172 INFO L226 Difference]: Without dead ends: 363 [2018-12-03 16:17:36,173 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 776 GetRequests, 563 SyntacticMatches, 30 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20787 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=14535, Invalid=19505, Unknown=0, NotChecked=0, Total=34040 [2018-12-03 16:17:36,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-12-03 16:17:36,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 359. [2018-12-03 16:17:36,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-12-03 16:17:36,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 501 transitions. [2018-12-03 16:17:36,179 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 501 transitions. Word has length 353 [2018-12-03 16:17:36,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:17:36,180 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 501 transitions. [2018-12-03 16:17:36,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-12-03 16:17:36,180 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 501 transitions. [2018-12-03 16:17:36,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-12-03 16:17:36,181 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:17:36,181 INFO L402 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 1, 1, 1] [2018-12-03 16:17:36,181 INFO L423 AbstractCegarLoop]: === Iteration 73 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:17:36,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:17:36,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1462961871, now seen corresponding path program 71 times [2018-12-03 16:17:36,182 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:17:36,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:17:36,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:17:36,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:17:36,183 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:17:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:17:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12496 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:17:38,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:17:38,775 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:17:38,775 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:17:38,775 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:17:38,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:17:38,776 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:17:38,786 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:17:38,786 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:17:38,964 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2018-12-03 16:17:38,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:17:38,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:17:42,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12496 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:17:42,790 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:17:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12496 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:17:47,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:17:47,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 185 [2018-12-03 16:17:47,531 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:17:47,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-12-03 16:17:47,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-12-03 16:17:47,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14649, Invalid=19761, Unknown=0, NotChecked=0, Total=34410 [2018-12-03 16:17:47,534 INFO L87 Difference]: Start difference. First operand 359 states and 501 transitions. Second operand 146 states. [2018-12-03 16:17:49,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:17:49,145 INFO L93 Difference]: Finished difference Result 370 states and 516 transitions. [2018-12-03 16:17:49,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-12-03 16:17:49,146 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 358 [2018-12-03 16:17:49,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:17:49,147 INFO L225 Difference]: With dead ends: 370 [2018-12-03 16:17:49,148 INFO L226 Difference]: Without dead ends: 368 [2018-12-03 16:17:49,149 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 571 SyntacticMatches, 32 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21344 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=14649, Invalid=19761, Unknown=0, NotChecked=0, Total=34410 [2018-12-03 16:17:49,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2018-12-03 16:17:49,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 364. [2018-12-03 16:17:49,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-12-03 16:17:49,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 508 transitions. [2018-12-03 16:17:49,155 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 508 transitions. Word has length 358 [2018-12-03 16:17:49,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:17:49,156 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 508 transitions. [2018-12-03 16:17:49,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-12-03 16:17:49,156 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 508 transitions. [2018-12-03 16:17:49,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-12-03 16:17:49,157 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:17:49,157 INFO L402 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 1, 1, 1] [2018-12-03 16:17:49,158 INFO L423 AbstractCegarLoop]: === Iteration 74 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:17:49,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:17:49,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1552962976, now seen corresponding path program 72 times [2018-12-03 16:17:49,158 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:17:49,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:17:49,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:17:49,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:17:49,159 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:17:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:17:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12852 backedges. 0 proven. 12852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:17:51,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:17:51,592 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:17:51,592 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:17:51,592 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:17:51,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:17:51,592 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:17:51,600 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:17:51,600 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:17:51,691 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:17:51,691 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:17:51,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:17:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12852 backedges. 0 proven. 12852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:17:55,864 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:18:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12852 backedges. 0 proven. 12852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:18:00,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:18:00,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 186 [2018-12-03 16:18:00,737 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:18:00,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-12-03 16:18:00,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-12-03 16:18:00,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14763, Invalid=20019, Unknown=0, NotChecked=0, Total=34782 [2018-12-03 16:18:00,740 INFO L87 Difference]: Start difference. First operand 364 states and 508 transitions. Second operand 148 states. [2018-12-03 16:18:02,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:18:02,320 INFO L93 Difference]: Finished difference Result 375 states and 523 transitions. [2018-12-03 16:18:02,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-12-03 16:18:02,321 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 363 [2018-12-03 16:18:02,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:18:02,322 INFO L225 Difference]: With dead ends: 375 [2018-12-03 16:18:02,322 INFO L226 Difference]: Without dead ends: 373 [2018-12-03 16:18:02,323 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 798 GetRequests, 579 SyntacticMatches, 34 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21901 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=14763, Invalid=20019, Unknown=0, NotChecked=0, Total=34782 [2018-12-03 16:18:02,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2018-12-03 16:18:02,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 369. [2018-12-03 16:18:02,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2018-12-03 16:18:02,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 515 transitions. [2018-12-03 16:18:02,330 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 515 transitions. Word has length 363 [2018-12-03 16:18:02,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:18:02,330 INFO L480 AbstractCegarLoop]: Abstraction has 369 states and 515 transitions. [2018-12-03 16:18:02,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-12-03 16:18:02,330 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 515 transitions. [2018-12-03 16:18:02,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-12-03 16:18:02,331 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:18:02,332 INFO L402 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 1, 1, 1] [2018-12-03 16:18:02,332 INFO L423 AbstractCegarLoop]: === Iteration 75 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:18:02,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:18:02,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1173382801, now seen corresponding path program 73 times [2018-12-03 16:18:02,332 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:18:02,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:18:02,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:18:02,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:18:02,333 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:18:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:18:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 0 proven. 13213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:18:05,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:18:05,129 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:18:05,129 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:18:05,129 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:18:05,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:18:05,129 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:18:05,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:18:05,138 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:18:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:18:05,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:18:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 0 proven. 13213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:18:09,548 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:18:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 0 proven. 13213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:18:14,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:18:14,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 187 [2018-12-03 16:18:14,461 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:18:14,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-12-03 16:18:14,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-12-03 16:18:14,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14877, Invalid=20279, Unknown=0, NotChecked=0, Total=35156 [2018-12-03 16:18:14,464 INFO L87 Difference]: Start difference. First operand 369 states and 515 transitions. Second operand 150 states. [2018-12-03 16:18:16,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:18:16,184 INFO L93 Difference]: Finished difference Result 380 states and 530 transitions. [2018-12-03 16:18:16,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-12-03 16:18:16,184 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 368 [2018-12-03 16:18:16,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:18:16,186 INFO L225 Difference]: With dead ends: 380 [2018-12-03 16:18:16,186 INFO L226 Difference]: Without dead ends: 378 [2018-12-03 16:18:16,186 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 587 SyntacticMatches, 36 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22458 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=14877, Invalid=20279, Unknown=0, NotChecked=0, Total=35156 [2018-12-03 16:18:16,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2018-12-03 16:18:16,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 374. [2018-12-03 16:18:16,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2018-12-03 16:18:16,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 522 transitions. [2018-12-03 16:18:16,194 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 522 transitions. Word has length 368 [2018-12-03 16:18:16,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:18:16,194 INFO L480 AbstractCegarLoop]: Abstraction has 374 states and 522 transitions. [2018-12-03 16:18:16,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-12-03 16:18:16,194 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 522 transitions. [2018-12-03 16:18:16,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-12-03 16:18:16,196 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:18:16,196 INFO L402 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 1, 1, 1] [2018-12-03 16:18:16,197 INFO L423 AbstractCegarLoop]: === Iteration 76 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:18:16,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:18:16,197 INFO L82 PathProgramCache]: Analyzing trace with hash 559563840, now seen corresponding path program 74 times [2018-12-03 16:18:16,197 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:18:16,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:18:16,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:18:16,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:18:16,198 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:18:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:18:18,750 INFO L134 CoverageAnalysis]: Checked inductivity of 13579 backedges. 0 proven. 13579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:18:18,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:18:18,750 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:18:18,750 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:18:18,750 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:18:18,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:18:18,751 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:18:18,759 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:18:18,759 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:18:18,948 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2018-12-03 16:18:18,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:18:18,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:18:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 13579 backedges. 0 proven. 13579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:18:23,311 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:18:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 13579 backedges. 0 proven. 13579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:18:28,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:18:28,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 188 [2018-12-03 16:18:28,160 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:18:28,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-12-03 16:18:28,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-12-03 16:18:28,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14991, Invalid=20541, Unknown=0, NotChecked=0, Total=35532 [2018-12-03 16:18:28,163 INFO L87 Difference]: Start difference. First operand 374 states and 522 transitions. Second operand 152 states. [2018-12-03 16:18:29,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:18:29,941 INFO L93 Difference]: Finished difference Result 385 states and 537 transitions. [2018-12-03 16:18:29,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-12-03 16:18:29,941 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 373 [2018-12-03 16:18:29,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:18:29,943 INFO L225 Difference]: With dead ends: 385 [2018-12-03 16:18:29,943 INFO L226 Difference]: Without dead ends: 383 [2018-12-03 16:18:29,944 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 820 GetRequests, 595 SyntacticMatches, 38 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23015 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=14991, Invalid=20541, Unknown=0, NotChecked=0, Total=35532 [2018-12-03 16:18:29,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-12-03 16:18:29,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 379. [2018-12-03 16:18:29,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2018-12-03 16:18:29,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 529 transitions. [2018-12-03 16:18:29,951 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 529 transitions. Word has length 373 [2018-12-03 16:18:29,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:18:29,951 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 529 transitions. [2018-12-03 16:18:29,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-12-03 16:18:29,951 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 529 transitions. [2018-12-03 16:18:29,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2018-12-03 16:18:29,952 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:18:29,953 INFO L402 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 1, 1, 1] [2018-12-03 16:18:29,953 INFO L423 AbstractCegarLoop]: === Iteration 77 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:18:29,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:18:29,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1228053489, now seen corresponding path program 75 times [2018-12-03 16:18:29,953 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:18:29,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:18:29,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:18:29,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:18:29,954 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:18:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:18:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 13950 backedges. 0 proven. 13950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:18:32,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:18:32,545 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:18:32,545 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:18:32,545 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:18:32,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:18:32,545 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:18:32,553 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:18:32,553 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:18:32,646 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:18:32,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:18:32,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:18:37,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13950 backedges. 0 proven. 13950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:18:37,217 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:18:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 13950 backedges. 0 proven. 13950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:18:42,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:18:42,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 189 [2018-12-03 16:18:42,231 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:18:42,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-12-03 16:18:42,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-12-03 16:18:42,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15105, Invalid=20805, Unknown=0, NotChecked=0, Total=35910 [2018-12-03 16:18:42,234 INFO L87 Difference]: Start difference. First operand 379 states and 529 transitions. Second operand 154 states. [2018-12-03 16:18:44,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:18:44,142 INFO L93 Difference]: Finished difference Result 390 states and 544 transitions. [2018-12-03 16:18:44,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-12-03 16:18:44,142 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 378 [2018-12-03 16:18:44,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:18:44,144 INFO L225 Difference]: With dead ends: 390 [2018-12-03 16:18:44,144 INFO L226 Difference]: Without dead ends: 388 [2018-12-03 16:18:44,145 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 831 GetRequests, 603 SyntacticMatches, 40 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23572 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=15105, Invalid=20805, Unknown=0, NotChecked=0, Total=35910 [2018-12-03 16:18:44,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2018-12-03 16:18:44,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 384. [2018-12-03 16:18:44,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2018-12-03 16:18:44,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 536 transitions. [2018-12-03 16:18:44,152 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 536 transitions. Word has length 378 [2018-12-03 16:18:44,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:18:44,152 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 536 transitions. [2018-12-03 16:18:44,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-12-03 16:18:44,153 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 536 transitions. [2018-12-03 16:18:44,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2018-12-03 16:18:44,154 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:18:44,154 INFO L402 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 1, 1, 1] [2018-12-03 16:18:44,154 INFO L423 AbstractCegarLoop]: === Iteration 78 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:18:44,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:18:44,154 INFO L82 PathProgramCache]: Analyzing trace with hash -335385888, now seen corresponding path program 76 times [2018-12-03 16:18:44,155 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:18:44,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:18:44,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:18:44,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:18:44,155 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:18:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:18:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 14326 backedges. 0 proven. 14326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:18:47,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:18:47,117 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:18:47,117 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:18:47,118 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:18:47,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:18:47,118 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:18:47,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:18:47,126 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:18:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:18:47,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:18:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 14326 backedges. 0 proven. 14326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:18:51,867 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:18:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 14326 backedges. 0 proven. 14326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:18:56,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:18:56,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 190 [2018-12-03 16:18:56,832 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:18:56,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-12-03 16:18:56,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-12-03 16:18:56,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15219, Invalid=21071, Unknown=0, NotChecked=0, Total=36290 [2018-12-03 16:18:56,835 INFO L87 Difference]: Start difference. First operand 384 states and 536 transitions. Second operand 156 states. [2018-12-03 16:18:58,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:18:58,743 INFO L93 Difference]: Finished difference Result 395 states and 551 transitions. [2018-12-03 16:18:58,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-12-03 16:18:58,743 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 383 [2018-12-03 16:18:58,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:18:58,745 INFO L225 Difference]: With dead ends: 395 [2018-12-03 16:18:58,745 INFO L226 Difference]: Without dead ends: 393 [2018-12-03 16:18:58,746 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 842 GetRequests, 611 SyntacticMatches, 42 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24129 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=15219, Invalid=21071, Unknown=0, NotChecked=0, Total=36290 [2018-12-03 16:18:58,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-12-03 16:18:58,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 389. [2018-12-03 16:18:58,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2018-12-03 16:18:58,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 543 transitions. [2018-12-03 16:18:58,754 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 543 transitions. Word has length 383 [2018-12-03 16:18:58,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:18:58,754 INFO L480 AbstractCegarLoop]: Abstraction has 389 states and 543 transitions. [2018-12-03 16:18:58,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-12-03 16:18:58,754 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 543 transitions. [2018-12-03 16:18:58,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2018-12-03 16:18:58,756 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:18:58,756 INFO L402 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 1, 1, 1] [2018-12-03 16:18:58,756 INFO L423 AbstractCegarLoop]: === Iteration 79 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:18:58,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:18:58,756 INFO L82 PathProgramCache]: Analyzing trace with hash -793142959, now seen corresponding path program 77 times [2018-12-03 16:18:58,757 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:18:58,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:18:58,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:18:58,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:18:58,757 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:18:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:19:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14707 backedges. 0 proven. 14707 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:19:01,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:19:01,785 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:19:01,785 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:19:01,785 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:19:01,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:19:01,785 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:19:01,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:19:01,794 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:19:01,993 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 78 check-sat command(s) [2018-12-03 16:19:01,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:19:02,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:19:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 14707 backedges. 0 proven. 14707 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:19:06,727 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:19:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 14707 backedges. 0 proven. 14707 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:19:11,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:19:11,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 191 [2018-12-03 16:19:11,710 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:19:11,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-12-03 16:19:11,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-12-03 16:19:11,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15333, Invalid=21339, Unknown=0, NotChecked=0, Total=36672 [2018-12-03 16:19:11,713 INFO L87 Difference]: Start difference. First operand 389 states and 543 transitions. Second operand 158 states. [2018-12-03 16:19:13,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:19:13,734 INFO L93 Difference]: Finished difference Result 400 states and 558 transitions. [2018-12-03 16:19:13,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-12-03 16:19:13,734 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 388 [2018-12-03 16:19:13,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:19:13,736 INFO L225 Difference]: With dead ends: 400 [2018-12-03 16:19:13,736 INFO L226 Difference]: Without dead ends: 398 [2018-12-03 16:19:13,737 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 853 GetRequests, 619 SyntacticMatches, 44 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24686 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=15333, Invalid=21339, Unknown=0, NotChecked=0, Total=36672 [2018-12-03 16:19:13,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-12-03 16:19:13,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 394. [2018-12-03 16:19:13,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2018-12-03 16:19:13,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 550 transitions. [2018-12-03 16:19:13,745 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 550 transitions. Word has length 388 [2018-12-03 16:19:13,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:19:13,746 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 550 transitions. [2018-12-03 16:19:13,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-12-03 16:19:13,746 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 550 transitions. [2018-12-03 16:19:13,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2018-12-03 16:19:13,747 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:19:13,747 INFO L402 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 1, 1, 1] [2018-12-03 16:19:13,748 INFO L423 AbstractCegarLoop]: === Iteration 80 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:19:13,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:19:13,748 INFO L82 PathProgramCache]: Analyzing trace with hash -2044540544, now seen corresponding path program 78 times [2018-12-03 16:19:13,748 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:19:13,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:19:13,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:19:13,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:19:13,749 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:19:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:19:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 15093 backedges. 0 proven. 15093 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:19:16,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:19:16,892 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:19:16,892 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:19:16,892 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:19:16,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:19:16,892 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:19:16,901 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:19:16,901 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:19:16,999 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:19:16,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:19:17,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:19:21,964 INFO L134 CoverageAnalysis]: Checked inductivity of 15093 backedges. 0 proven. 15093 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:19:21,964 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:19:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 15093 backedges. 0 proven. 15093 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:19:27,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:19:27,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 192 [2018-12-03 16:19:27,026 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:19:27,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-12-03 16:19:27,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-12-03 16:19:27,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15447, Invalid=21609, Unknown=0, NotChecked=0, Total=37056 [2018-12-03 16:19:27,029 INFO L87 Difference]: Start difference. First operand 394 states and 550 transitions. Second operand 160 states. [2018-12-03 16:19:29,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:19:29,004 INFO L93 Difference]: Finished difference Result 405 states and 565 transitions. [2018-12-03 16:19:29,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-12-03 16:19:29,005 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 393 [2018-12-03 16:19:29,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:19:29,006 INFO L225 Difference]: With dead ends: 405 [2018-12-03 16:19:29,006 INFO L226 Difference]: Without dead ends: 403 [2018-12-03 16:19:29,007 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 627 SyntacticMatches, 46 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25243 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=15447, Invalid=21609, Unknown=0, NotChecked=0, Total=37056 [2018-12-03 16:19:29,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2018-12-03 16:19:29,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 399. [2018-12-03 16:19:29,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2018-12-03 16:19:29,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 557 transitions. [2018-12-03 16:19:29,015 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 557 transitions. Word has length 393 [2018-12-03 16:19:29,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:19:29,015 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 557 transitions. [2018-12-03 16:19:29,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-12-03 16:19:29,015 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 557 transitions. [2018-12-03 16:19:29,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2018-12-03 16:19:29,016 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:19:29,017 INFO L402 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 1, 1, 1] [2018-12-03 16:19:29,017 INFO L423 AbstractCegarLoop]: === Iteration 81 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:19:29,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:19:29,017 INFO L82 PathProgramCache]: Analyzing trace with hash 53173937, now seen corresponding path program 79 times [2018-12-03 16:19:29,017 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:19:29,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:19:29,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:19:29,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:19:29,018 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:19:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:19:32,138 INFO L134 CoverageAnalysis]: Checked inductivity of 15484 backedges. 0 proven. 15484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:19:32,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:19:32,139 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:19:32,139 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:19:32,139 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:19:32,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:19:32,139 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:19:32,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:19:32,147 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:19:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:19:32,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:19:37,284 INFO L134 CoverageAnalysis]: Checked inductivity of 15484 backedges. 0 proven. 15484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:19:37,284 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:19:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 15484 backedges. 0 proven. 15484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:19:42,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:19:42,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 193 [2018-12-03 16:19:42,318 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:19:42,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-12-03 16:19:42,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-12-03 16:19:42,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15561, Invalid=21881, Unknown=0, NotChecked=0, Total=37442 [2018-12-03 16:19:42,322 INFO L87 Difference]: Start difference. First operand 399 states and 557 transitions. Second operand 162 states. [2018-12-03 16:19:44,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:19:44,430 INFO L93 Difference]: Finished difference Result 410 states and 572 transitions. [2018-12-03 16:19:44,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-12-03 16:19:44,431 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 398 [2018-12-03 16:19:44,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:19:44,432 INFO L225 Difference]: With dead ends: 410 [2018-12-03 16:19:44,433 INFO L226 Difference]: Without dead ends: 408 [2018-12-03 16:19:44,434 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 635 SyntacticMatches, 48 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25800 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=15561, Invalid=21881, Unknown=0, NotChecked=0, Total=37442 [2018-12-03 16:19:44,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2018-12-03 16:19:44,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 404. [2018-12-03 16:19:44,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2018-12-03 16:19:44,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 564 transitions. [2018-12-03 16:19:44,441 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 564 transitions. Word has length 398 [2018-12-03 16:19:44,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:19:44,441 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 564 transitions. [2018-12-03 16:19:44,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-12-03 16:19:44,442 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 564 transitions. [2018-12-03 16:19:44,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2018-12-03 16:19:44,443 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:19:44,443 INFO L402 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 1, 1, 1] [2018-12-03 16:19:44,443 INFO L423 AbstractCegarLoop]: === Iteration 82 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:19:44,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:19:44,444 INFO L82 PathProgramCache]: Analyzing trace with hash 13983776, now seen corresponding path program 80 times [2018-12-03 16:19:44,444 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:19:44,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:19:44,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:19:44,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:19:44,445 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:19:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:19:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 15880 backedges. 0 proven. 15880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:19:47,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:19:47,625 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:19:47,625 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:19:47,626 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:19:47,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:19:47,626 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:19:47,634 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:19:47,634 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:19:47,844 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2018-12-03 16:19:47,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:19:47,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:19:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 15880 backedges. 0 proven. 15880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:19:52,962 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:19:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 15880 backedges. 0 proven. 15880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:19:58,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:19:58,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 194 [2018-12-03 16:19:58,079 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:19:58,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-12-03 16:19:58,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-12-03 16:19:58,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15675, Invalid=22155, Unknown=0, NotChecked=0, Total=37830 [2018-12-03 16:19:58,082 INFO L87 Difference]: Start difference. First operand 404 states and 564 transitions. Second operand 164 states. [2018-12-03 16:20:00,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:20:00,268 INFO L93 Difference]: Finished difference Result 415 states and 579 transitions. [2018-12-03 16:20:00,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-12-03 16:20:00,268 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 403 [2018-12-03 16:20:00,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:20:00,270 INFO L225 Difference]: With dead ends: 415 [2018-12-03 16:20:00,270 INFO L226 Difference]: Without dead ends: 413 [2018-12-03 16:20:00,271 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 886 GetRequests, 643 SyntacticMatches, 50 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26357 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=15675, Invalid=22155, Unknown=0, NotChecked=0, Total=37830 [2018-12-03 16:20:00,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2018-12-03 16:20:00,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 409. [2018-12-03 16:20:00,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2018-12-03 16:20:00,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 571 transitions. [2018-12-03 16:20:00,278 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 571 transitions. Word has length 403 [2018-12-03 16:20:00,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:20:00,279 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 571 transitions. [2018-12-03 16:20:00,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-12-03 16:20:00,279 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 571 transitions. [2018-12-03 16:20:00,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2018-12-03 16:20:00,280 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:20:00,281 INFO L402 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 81, 1, 1, 1] [2018-12-03 16:20:00,281 INFO L423 AbstractCegarLoop]: === Iteration 83 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:20:00,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:20:00,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1873669137, now seen corresponding path program 81 times [2018-12-03 16:20:00,281 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:20:00,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:20:00,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:20:00,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:20:00,282 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:20:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:20:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16281 backedges. 0 proven. 16281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:20:03,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:20:03,658 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:20:03,658 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:20:03,658 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:20:03,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:20:03,658 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:20:03,666 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:20:03,666 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:20:03,769 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:20:03,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:20:03,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:20:09,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16281 backedges. 0 proven. 16281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:20:09,009 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:20:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16281 backedges. 0 proven. 16281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:20:14,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:20:14,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 195 [2018-12-03 16:20:14,235 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:20:14,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-12-03 16:20:14,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-12-03 16:20:14,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15789, Invalid=22431, Unknown=0, NotChecked=0, Total=38220 [2018-12-03 16:20:14,240 INFO L87 Difference]: Start difference. First operand 409 states and 571 transitions. Second operand 166 states. [2018-12-03 16:20:16,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:20:16,505 INFO L93 Difference]: Finished difference Result 420 states and 586 transitions. [2018-12-03 16:20:16,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-12-03 16:20:16,505 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 408 [2018-12-03 16:20:16,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:20:16,507 INFO L225 Difference]: With dead ends: 420 [2018-12-03 16:20:16,507 INFO L226 Difference]: Without dead ends: 418 [2018-12-03 16:20:16,508 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 897 GetRequests, 651 SyntacticMatches, 52 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26914 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=15789, Invalid=22431, Unknown=0, NotChecked=0, Total=38220 [2018-12-03 16:20:16,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2018-12-03 16:20:16,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 414. [2018-12-03 16:20:16,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2018-12-03 16:20:16,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 578 transitions. [2018-12-03 16:20:16,515 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 578 transitions. Word has length 408 [2018-12-03 16:20:16,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:20:16,516 INFO L480 AbstractCegarLoop]: Abstraction has 414 states and 578 transitions. [2018-12-03 16:20:16,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-12-03 16:20:16,516 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 578 transitions. [2018-12-03 16:20:16,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2018-12-03 16:20:16,517 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:20:16,518 INFO L402 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 82, 1, 1, 1] [2018-12-03 16:20:16,518 INFO L423 AbstractCegarLoop]: === Iteration 84 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:20:16,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:20:16,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1421094592, now seen corresponding path program 82 times [2018-12-03 16:20:16,518 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:20:16,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:20:16,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:20:16,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:20:16,519 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:20:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:20:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16687 backedges. 0 proven. 16687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:20:19,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:20:19,912 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:20:19,912 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:20:19,912 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:20:19,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:20:19,912 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:20:19,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:20:19,921 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:20:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:20:20,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:20:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16687 backedges. 0 proven. 16687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:20:25,350 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:20:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16687 backedges. 0 proven. 16687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:20:30,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:20:30,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84, 84] total 196 [2018-12-03 16:20:30,459 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:20:30,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-12-03 16:20:30,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-12-03 16:20:30,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15903, Invalid=22709, Unknown=0, NotChecked=0, Total=38612 [2018-12-03 16:20:30,463 INFO L87 Difference]: Start difference. First operand 414 states and 578 transitions. Second operand 168 states. [2018-12-03 16:20:32,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:20:32,783 INFO L93 Difference]: Finished difference Result 425 states and 593 transitions. [2018-12-03 16:20:32,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-12-03 16:20:32,784 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 413 [2018-12-03 16:20:32,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:20:32,786 INFO L225 Difference]: With dead ends: 425 [2018-12-03 16:20:32,786 INFO L226 Difference]: Without dead ends: 423 [2018-12-03 16:20:32,787 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 659 SyntacticMatches, 54 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27471 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=15903, Invalid=22709, Unknown=0, NotChecked=0, Total=38612 [2018-12-03 16:20:32,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-12-03 16:20:32,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 419. [2018-12-03 16:20:32,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2018-12-03 16:20:32,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 585 transitions. [2018-12-03 16:20:32,794 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 585 transitions. Word has length 413 [2018-12-03 16:20:32,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:20:32,795 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 585 transitions. [2018-12-03 16:20:32,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-12-03 16:20:32,795 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 585 transitions. [2018-12-03 16:20:32,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2018-12-03 16:20:32,796 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:20:32,797 INFO L402 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 83, 1, 1, 1] [2018-12-03 16:20:32,797 INFO L423 AbstractCegarLoop]: === Iteration 85 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:20:32,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:20:32,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1843872113, now seen corresponding path program 83 times [2018-12-03 16:20:32,797 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:20:32,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:20:32,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:20:32,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:20:32,798 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:20:32,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:20:35,996 INFO L134 CoverageAnalysis]: Checked inductivity of 17098 backedges. 0 proven. 17098 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:20:35,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:20:35,996 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:20:35,996 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:20:35,996 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:20:35,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:20:35,996 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:20:36,005 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:20:36,005 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:20:36,231 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2018-12-03 16:20:36,231 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:20:36,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:20:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 17098 backedges. 0 proven. 17098 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:20:41,691 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:20:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 17098 backedges. 0 proven. 17098 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:20:46,853 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:20:46,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 197 [2018-12-03 16:20:46,853 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:20:46,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-12-03 16:20:46,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-12-03 16:20:46,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16017, Invalid=22989, Unknown=0, NotChecked=0, Total=39006 [2018-12-03 16:20:46,857 INFO L87 Difference]: Start difference. First operand 419 states and 585 transitions. Second operand 170 states. [2018-12-03 16:20:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:20:49,155 INFO L93 Difference]: Finished difference Result 430 states and 600 transitions. [2018-12-03 16:20:49,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-12-03 16:20:49,155 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 418 [2018-12-03 16:20:49,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:20:49,157 INFO L225 Difference]: With dead ends: 430 [2018-12-03 16:20:49,157 INFO L226 Difference]: Without dead ends: 428 [2018-12-03 16:20:49,158 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 667 SyntacticMatches, 56 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28028 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=16017, Invalid=22989, Unknown=0, NotChecked=0, Total=39006 [2018-12-03 16:20:49,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2018-12-03 16:20:49,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 424. [2018-12-03 16:20:49,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-12-03 16:20:49,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 592 transitions. [2018-12-03 16:20:49,167 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 592 transitions. Word has length 418 [2018-12-03 16:20:49,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:20:49,167 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 592 transitions. [2018-12-03 16:20:49,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-12-03 16:20:49,167 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 592 transitions. [2018-12-03 16:20:49,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-12-03 16:20:49,169 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:20:49,169 INFO L402 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 84, 1, 1, 1] [2018-12-03 16:20:49,170 INFO L423 AbstractCegarLoop]: === Iteration 86 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:20:49,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:20:49,170 INFO L82 PathProgramCache]: Analyzing trace with hash 31012192, now seen corresponding path program 84 times [2018-12-03 16:20:49,170 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:20:49,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:20:49,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:20:49,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:20:49,171 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:20:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:20:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 17514 backedges. 0 proven. 17514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:20:52,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:20:52,415 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:20:52,415 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:20:52,415 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:20:52,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:20:52,415 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:20:52,424 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:20:52,424 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:20:52,528 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:20:52,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:20:52,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:20:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 17514 backedges. 0 proven. 17514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:20:57,968 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:21:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 17514 backedges. 0 proven. 17514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:21:02,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:21:02,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86, 86] total 198 [2018-12-03 16:21:02,903 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:21:02,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-12-03 16:21:02,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-12-03 16:21:02,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16131, Invalid=23271, Unknown=0, NotChecked=0, Total=39402 [2018-12-03 16:21:02,907 INFO L87 Difference]: Start difference. First operand 424 states and 592 transitions. Second operand 172 states. [2018-12-03 16:21:05,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:21:05,361 INFO L93 Difference]: Finished difference Result 435 states and 607 transitions. [2018-12-03 16:21:05,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-12-03 16:21:05,361 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 423 [2018-12-03 16:21:05,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:21:05,363 INFO L225 Difference]: With dead ends: 435 [2018-12-03 16:21:05,363 INFO L226 Difference]: Without dead ends: 433 [2018-12-03 16:21:05,364 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 675 SyntacticMatches, 58 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28585 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=16131, Invalid=23271, Unknown=0, NotChecked=0, Total=39402 [2018-12-03 16:21:05,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2018-12-03 16:21:05,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 429. [2018-12-03 16:21:05,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2018-12-03 16:21:05,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 599 transitions. [2018-12-03 16:21:05,372 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 599 transitions. Word has length 423 [2018-12-03 16:21:05,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:21:05,373 INFO L480 AbstractCegarLoop]: Abstraction has 429 states and 599 transitions. [2018-12-03 16:21:05,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-12-03 16:21:05,373 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 599 transitions. [2018-12-03 16:21:05,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2018-12-03 16:21:05,375 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:21:05,375 INFO L402 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 85, 1, 1, 1] [2018-12-03 16:21:05,375 INFO L423 AbstractCegarLoop]: === Iteration 87 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:21:05,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:21:05,375 INFO L82 PathProgramCache]: Analyzing trace with hash 2113756881, now seen corresponding path program 85 times [2018-12-03 16:21:05,375 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:21:05,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:21:05,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:21:05,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:21:05,376 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:21:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:21:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 17935 backedges. 0 proven. 17935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:21:08,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:21:08,940 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:21:08,940 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:21:08,940 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:21:08,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:21:08,940 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:21:08,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:21:08,949 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:21:09,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:21:09,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:21:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 17935 backedges. 0 proven. 17935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:21:14,791 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:21:20,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17935 backedges. 0 proven. 17935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:21:20,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:21:20,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87, 87] total 199 [2018-12-03 16:21:20,037 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:21:20,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-12-03 16:21:20,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-12-03 16:21:20,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16245, Invalid=23555, Unknown=0, NotChecked=0, Total=39800 [2018-12-03 16:21:20,040 INFO L87 Difference]: Start difference. First operand 429 states and 599 transitions. Second operand 174 states. [2018-12-03 16:21:22,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:21:22,558 INFO L93 Difference]: Finished difference Result 440 states and 614 transitions. [2018-12-03 16:21:22,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-12-03 16:21:22,558 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 428 [2018-12-03 16:21:22,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:21:22,560 INFO L225 Difference]: With dead ends: 440 [2018-12-03 16:21:22,560 INFO L226 Difference]: Without dead ends: 438 [2018-12-03 16:21:22,561 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 941 GetRequests, 683 SyntacticMatches, 60 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29142 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=16245, Invalid=23555, Unknown=0, NotChecked=0, Total=39800 [2018-12-03 16:21:22,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2018-12-03 16:21:22,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 434. [2018-12-03 16:21:22,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-12-03 16:21:22,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 606 transitions. [2018-12-03 16:21:22,568 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 606 transitions. Word has length 428 [2018-12-03 16:21:22,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:21:22,569 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 606 transitions. [2018-12-03 16:21:22,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-12-03 16:21:22,569 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 606 transitions. [2018-12-03 16:21:22,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2018-12-03 16:21:22,570 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:21:22,571 INFO L402 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 86, 1, 1, 1] [2018-12-03 16:21:22,571 INFO L423 AbstractCegarLoop]: === Iteration 88 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:21:22,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:21:22,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1344375808, now seen corresponding path program 86 times [2018-12-03 16:21:22,571 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:21:22,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:21:22,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:21:22,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:21:22,572 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:21:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:21:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18361 backedges. 0 proven. 18361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:21:26,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:21:26,186 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:21:26,186 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:21:26,186 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:21:26,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:21:26,186 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:21:26,195 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:21:26,195 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:21:26,432 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 87 check-sat command(s) [2018-12-03 16:21:26,432 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:21:26,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:21:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 18361 backedges. 0 proven. 18361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:21:32,290 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:21:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18361 backedges. 0 proven. 18361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:21:37,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:21:37,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88, 88] total 200 [2018-12-03 16:21:37,524 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:21:37,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-12-03 16:21:37,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-12-03 16:21:37,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16359, Invalid=23841, Unknown=0, NotChecked=0, Total=40200 [2018-12-03 16:21:37,529 INFO L87 Difference]: Start difference. First operand 434 states and 606 transitions. Second operand 176 states. [2018-12-03 16:21:40,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:21:40,145 INFO L93 Difference]: Finished difference Result 445 states and 621 transitions. [2018-12-03 16:21:40,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-12-03 16:21:40,146 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 433 [2018-12-03 16:21:40,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:21:40,147 INFO L225 Difference]: With dead ends: 445 [2018-12-03 16:21:40,147 INFO L226 Difference]: Without dead ends: 443 [2018-12-03 16:21:40,149 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 952 GetRequests, 691 SyntacticMatches, 62 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29699 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=16359, Invalid=23841, Unknown=0, NotChecked=0, Total=40200 [2018-12-03 16:21:40,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2018-12-03 16:21:40,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 439. [2018-12-03 16:21:40,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2018-12-03 16:21:40,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 613 transitions. [2018-12-03 16:21:40,156 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 613 transitions. Word has length 433 [2018-12-03 16:21:40,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:21:40,157 INFO L480 AbstractCegarLoop]: Abstraction has 439 states and 613 transitions. [2018-12-03 16:21:40,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-12-03 16:21:40,157 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 613 transitions. [2018-12-03 16:21:40,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2018-12-03 16:21:40,159 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:21:40,159 INFO L402 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 87, 1, 1, 1] [2018-12-03 16:21:40,159 INFO L423 AbstractCegarLoop]: === Iteration 89 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:21:40,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:21:40,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1466547151, now seen corresponding path program 87 times [2018-12-03 16:21:40,159 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:21:40,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:21:40,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:21:40,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:21:40,160 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:21:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:21:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 18792 backedges. 0 proven. 18792 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:21:43,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:21:43,632 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:21:43,632 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:21:43,632 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:21:43,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:21:43,632 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:21:43,642 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:21:43,642 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:21:43,747 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:21:43,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:21:43,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:21:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 18792 backedges. 0 proven. 18792 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:21:49,631 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:21:54,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18792 backedges. 0 proven. 18792 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:21:54,856 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:21:54,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 201 [2018-12-03 16:21:54,856 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:21:54,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 178 states [2018-12-03 16:21:54,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2018-12-03 16:21:54,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16473, Invalid=24129, Unknown=0, NotChecked=0, Total=40602 [2018-12-03 16:21:54,860 INFO L87 Difference]: Start difference. First operand 439 states and 613 transitions. Second operand 178 states. [2018-12-03 16:21:57,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:21:57,365 INFO L93 Difference]: Finished difference Result 450 states and 628 transitions. [2018-12-03 16:21:57,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-12-03 16:21:57,365 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 438 [2018-12-03 16:21:57,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:21:57,367 INFO L225 Difference]: With dead ends: 450 [2018-12-03 16:21:57,367 INFO L226 Difference]: Without dead ends: 448 [2018-12-03 16:21:57,368 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 963 GetRequests, 699 SyntacticMatches, 64 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30256 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=16473, Invalid=24129, Unknown=0, NotChecked=0, Total=40602 [2018-12-03 16:21:57,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2018-12-03 16:21:57,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 444. [2018-12-03 16:21:57,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2018-12-03 16:21:57,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 620 transitions. [2018-12-03 16:21:57,376 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 620 transitions. Word has length 438 [2018-12-03 16:21:57,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:21:57,376 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 620 transitions. [2018-12-03 16:21:57,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 178 states. [2018-12-03 16:21:57,376 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 620 transitions. [2018-12-03 16:21:57,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2018-12-03 16:21:57,378 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:21:57,378 INFO L402 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 88, 1, 1, 1] [2018-12-03 16:21:57,378 INFO L423 AbstractCegarLoop]: === Iteration 90 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:21:57,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:21:57,379 INFO L82 PathProgramCache]: Analyzing trace with hash -841094496, now seen corresponding path program 88 times [2018-12-03 16:21:57,379 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:21:57,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:21:57,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:21:57,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:21:57,379 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:21:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:22:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 19228 backedges. 0 proven. 19228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:22:01,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:22:01,118 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:22:01,118 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:22:01,118 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:22:01,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:22:01,118 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:22:01,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:22:01,127 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:22:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:22:01,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:22:07,312 INFO L134 CoverageAnalysis]: Checked inductivity of 19228 backedges. 0 proven. 19228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:22:07,312 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:22:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 19228 backedges. 0 proven. 19228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:22:12,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:22:12,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90, 90] total 202 [2018-12-03 16:22:12,579 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:22:12,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-12-03 16:22:12,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-12-03 16:22:12,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16587, Invalid=24419, Unknown=0, NotChecked=0, Total=41006 [2018-12-03 16:22:12,582 INFO L87 Difference]: Start difference. First operand 444 states and 620 transitions. Second operand 180 states. [2018-12-03 16:22:15,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:22:15,304 INFO L93 Difference]: Finished difference Result 455 states and 635 transitions. [2018-12-03 16:22:15,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-12-03 16:22:15,305 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 443 [2018-12-03 16:22:15,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:22:15,307 INFO L225 Difference]: With dead ends: 455 [2018-12-03 16:22:15,307 INFO L226 Difference]: Without dead ends: 453 [2018-12-03 16:22:15,308 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 974 GetRequests, 707 SyntacticMatches, 66 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30813 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=16587, Invalid=24419, Unknown=0, NotChecked=0, Total=41006 [2018-12-03 16:22:15,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2018-12-03 16:22:15,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 449. [2018-12-03 16:22:15,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2018-12-03 16:22:15,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 627 transitions. [2018-12-03 16:22:15,315 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 627 transitions. Word has length 443 [2018-12-03 16:22:15,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:22:15,316 INFO L480 AbstractCegarLoop]: Abstraction has 449 states and 627 transitions. [2018-12-03 16:22:15,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-12-03 16:22:15,316 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 627 transitions. [2018-12-03 16:22:15,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2018-12-03 16:22:15,317 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:22:15,318 INFO L402 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 89, 1, 1, 1] [2018-12-03 16:22:15,318 INFO L423 AbstractCegarLoop]: === Iteration 91 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:22:15,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:22:15,318 INFO L82 PathProgramCache]: Analyzing trace with hash -556273263, now seen corresponding path program 89 times [2018-12-03 16:22:15,318 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:22:15,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:22:15,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:22:15,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:22:15,319 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:22:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:22:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 19669 backedges. 0 proven. 19669 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:22:18,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:22:18,983 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:22:18,983 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:22:18,983 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:22:18,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:22:18,983 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:22:18,991 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:22:18,991 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:22:19,236 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 90 check-sat command(s) [2018-12-03 16:22:19,236 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:22:19,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:22:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 19669 backedges. 0 proven. 19669 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:22:25,595 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:22:30,965 INFO L134 CoverageAnalysis]: Checked inductivity of 19669 backedges. 0 proven. 19669 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:22:30,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:22:30,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91, 91] total 203 [2018-12-03 16:22:30,985 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:22:30,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 182 states [2018-12-03 16:22:30,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2018-12-03 16:22:30,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16701, Invalid=24711, Unknown=0, NotChecked=0, Total=41412 [2018-12-03 16:22:30,988 INFO L87 Difference]: Start difference. First operand 449 states and 627 transitions. Second operand 182 states. [2018-12-03 16:22:33,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:22:33,861 INFO L93 Difference]: Finished difference Result 460 states and 642 transitions. [2018-12-03 16:22:33,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-12-03 16:22:33,862 INFO L78 Accepts]: Start accepts. Automaton has 182 states. Word has length 448 [2018-12-03 16:22:33,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:22:33,863 INFO L225 Difference]: With dead ends: 460 [2018-12-03 16:22:33,863 INFO L226 Difference]: Without dead ends: 458 [2018-12-03 16:22:33,864 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 985 GetRequests, 715 SyntacticMatches, 68 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31370 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=16701, Invalid=24711, Unknown=0, NotChecked=0, Total=41412 [2018-12-03 16:22:33,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2018-12-03 16:22:33,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 454. [2018-12-03 16:22:33,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2018-12-03 16:22:33,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 634 transitions. [2018-12-03 16:22:33,872 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 634 transitions. Word has length 448 [2018-12-03 16:22:33,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:22:33,872 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 634 transitions. [2018-12-03 16:22:33,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 182 states. [2018-12-03 16:22:33,872 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 634 transitions. [2018-12-03 16:22:33,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2018-12-03 16:22:33,874 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:22:33,874 INFO L402 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 90, 1, 1, 1] [2018-12-03 16:22:33,874 INFO L423 AbstractCegarLoop]: === Iteration 92 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:22:33,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:22:33,874 INFO L82 PathProgramCache]: Analyzing trace with hash 846305600, now seen corresponding path program 90 times [2018-12-03 16:22:33,874 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:22:33,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:22:33,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:22:33,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:22:33,875 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:22:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:22:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 20115 backedges. 0 proven. 20115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:22:37,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:22:37,827 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:22:37,827 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:22:37,827 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:22:37,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:22:37,827 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:22:37,836 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:22:37,837 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:22:37,950 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:22:37,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:22:37,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:22:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20115 backedges. 0 proven. 20115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:22:44,286 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:22:49,667 INFO L134 CoverageAnalysis]: Checked inductivity of 20115 backedges. 0 proven. 20115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:22:49,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:22:49,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92, 92] total 204 [2018-12-03 16:22:49,687 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:22:49,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 184 states [2018-12-03 16:22:49,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2018-12-03 16:22:49,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16815, Invalid=25005, Unknown=0, NotChecked=0, Total=41820 [2018-12-03 16:22:49,691 INFO L87 Difference]: Start difference. First operand 454 states and 634 transitions. Second operand 184 states. [2018-12-03 16:22:52,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:22:52,698 INFO L93 Difference]: Finished difference Result 465 states and 649 transitions. [2018-12-03 16:22:52,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-12-03 16:22:52,698 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 453 [2018-12-03 16:22:52,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:22:52,700 INFO L225 Difference]: With dead ends: 465 [2018-12-03 16:22:52,700 INFO L226 Difference]: Without dead ends: 463 [2018-12-03 16:22:52,701 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 723 SyntacticMatches, 70 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31927 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=16815, Invalid=25005, Unknown=0, NotChecked=0, Total=41820 [2018-12-03 16:22:52,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2018-12-03 16:22:52,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 459. [2018-12-03 16:22:52,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2018-12-03 16:22:52,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 641 transitions. [2018-12-03 16:22:52,709 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 641 transitions. Word has length 453 [2018-12-03 16:22:52,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:22:52,710 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 641 transitions. [2018-12-03 16:22:52,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 184 states. [2018-12-03 16:22:52,710 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 641 transitions. [2018-12-03 16:22:52,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2018-12-03 16:22:52,712 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:22:52,712 INFO L402 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 91, 1, 1, 1] [2018-12-03 16:22:52,712 INFO L423 AbstractCegarLoop]: === Iteration 93 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:22:52,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:22:52,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1516791537, now seen corresponding path program 91 times [2018-12-03 16:22:52,713 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:22:52,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:22:52,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:22:52,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:22:52,713 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:22:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:22:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20566 backedges. 0 proven. 20566 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:22:56,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:22:56,854 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:22:56,854 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:22:56,854 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:22:56,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:22:56,854 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:22:56,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:22:56,863 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:22:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:22:56,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:23:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 20566 backedges. 0 proven. 20566 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:23:03,370 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:23:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 20566 backedges. 0 proven. 20566 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:23:08,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:23:08,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93, 93] total 205 [2018-12-03 16:23:08,721 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:23:08,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 186 states [2018-12-03 16:23:08,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2018-12-03 16:23:08,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16929, Invalid=25301, Unknown=0, NotChecked=0, Total=42230 [2018-12-03 16:23:08,725 INFO L87 Difference]: Start difference. First operand 459 states and 641 transitions. Second operand 186 states. [2018-12-03 16:23:11,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:23:11,704 INFO L93 Difference]: Finished difference Result 470 states and 656 transitions. [2018-12-03 16:23:11,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-12-03 16:23:11,704 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 458 [2018-12-03 16:23:11,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:23:11,706 INFO L225 Difference]: With dead ends: 470 [2018-12-03 16:23:11,706 INFO L226 Difference]: Without dead ends: 468 [2018-12-03 16:23:11,707 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1007 GetRequests, 731 SyntacticMatches, 72 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32484 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=16929, Invalid=25301, Unknown=0, NotChecked=0, Total=42230 [2018-12-03 16:23:11,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2018-12-03 16:23:11,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 464. [2018-12-03 16:23:11,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2018-12-03 16:23:11,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 648 transitions. [2018-12-03 16:23:11,715 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 648 transitions. Word has length 458 [2018-12-03 16:23:11,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:23:11,716 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 648 transitions. [2018-12-03 16:23:11,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 186 states. [2018-12-03 16:23:11,716 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 648 transitions. [2018-12-03 16:23:11,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2018-12-03 16:23:11,718 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:23:11,718 INFO L402 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 92, 1, 1, 1] [2018-12-03 16:23:11,718 INFO L423 AbstractCegarLoop]: === Iteration 94 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:23:11,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:23:11,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1145864224, now seen corresponding path program 92 times [2018-12-03 16:23:11,718 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:23:11,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:23:11,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:23:11,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:23:11,719 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:23:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:23:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 21022 backedges. 0 proven. 21022 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:23:15,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:23:15,608 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:23:15,609 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:23:15,609 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:23:15,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:23:15,609 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:23:15,617 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:23:15,618 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:23:15,885 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 93 check-sat command(s) [2018-12-03 16:23:15,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:23:15,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:23:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 21022 backedges. 0 proven. 21022 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:23:22,567 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:23:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 21022 backedges. 0 proven. 21022 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:23:28,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:23:28,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94, 94] total 206 [2018-12-03 16:23:28,047 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:23:28,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 188 states [2018-12-03 16:23:28,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2018-12-03 16:23:28,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17043, Invalid=25599, Unknown=0, NotChecked=0, Total=42642 [2018-12-03 16:23:28,050 INFO L87 Difference]: Start difference. First operand 464 states and 648 transitions. Second operand 188 states. [2018-12-03 16:23:31,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:23:31,133 INFO L93 Difference]: Finished difference Result 475 states and 663 transitions. [2018-12-03 16:23:31,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-12-03 16:23:31,134 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 463 [2018-12-03 16:23:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:23:31,135 INFO L225 Difference]: With dead ends: 475 [2018-12-03 16:23:31,136 INFO L226 Difference]: Without dead ends: 473 [2018-12-03 16:23:31,137 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1018 GetRequests, 739 SyntacticMatches, 74 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33041 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=17043, Invalid=25599, Unknown=0, NotChecked=0, Total=42642 [2018-12-03 16:23:31,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2018-12-03 16:23:31,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 469. [2018-12-03 16:23:31,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2018-12-03 16:23:31,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 655 transitions. [2018-12-03 16:23:31,145 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 655 transitions. Word has length 463 [2018-12-03 16:23:31,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:23:31,145 INFO L480 AbstractCegarLoop]: Abstraction has 469 states and 655 transitions. [2018-12-03 16:23:31,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 188 states. [2018-12-03 16:23:31,146 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 655 transitions. [2018-12-03 16:23:31,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2018-12-03 16:23:31,147 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:23:31,148 INFO L402 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 93, 1, 1, 1] [2018-12-03 16:23:31,148 INFO L423 AbstractCegarLoop]: === Iteration 95 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:23:31,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:23:31,148 INFO L82 PathProgramCache]: Analyzing trace with hash -43146159, now seen corresponding path program 93 times [2018-12-03 16:23:31,148 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:23:31,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:23:31,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:23:31,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:23:31,149 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:23:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:23:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 21483 backedges. 0 proven. 21483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:23:35,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:23:35,390 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:23:35,390 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:23:35,390 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:23:35,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:23:35,390 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:23:35,397 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:23:35,398 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:23:35,524 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:23:35,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:23:35,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:23:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 21483 backedges. 0 proven. 21483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:23:42,403 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:23:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 21483 backedges. 0 proven. 21483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:23:47,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:23:47,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 207 [2018-12-03 16:23:47,758 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:23:47,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 190 states [2018-12-03 16:23:47,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2018-12-03 16:23:47,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17157, Invalid=25899, Unknown=0, NotChecked=0, Total=43056 [2018-12-03 16:23:47,761 INFO L87 Difference]: Start difference. First operand 469 states and 655 transitions. Second operand 190 states. [2018-12-03 16:23:50,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:23:50,609 INFO L93 Difference]: Finished difference Result 480 states and 670 transitions. [2018-12-03 16:23:50,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-12-03 16:23:50,609 INFO L78 Accepts]: Start accepts. Automaton has 190 states. Word has length 468 [2018-12-03 16:23:50,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:23:50,611 INFO L225 Difference]: With dead ends: 480 [2018-12-03 16:23:50,612 INFO L226 Difference]: Without dead ends: 478 [2018-12-03 16:23:50,613 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1029 GetRequests, 747 SyntacticMatches, 76 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33598 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=17157, Invalid=25899, Unknown=0, NotChecked=0, Total=43056 [2018-12-03 16:23:50,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2018-12-03 16:23:50,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 474. [2018-12-03 16:23:50,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 474 states. [2018-12-03 16:23:50,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 662 transitions. [2018-12-03 16:23:50,624 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 662 transitions. Word has length 468 [2018-12-03 16:23:50,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:23:50,624 INFO L480 AbstractCegarLoop]: Abstraction has 474 states and 662 transitions. [2018-12-03 16:23:50,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 190 states. [2018-12-03 16:23:50,625 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 662 transitions. [2018-12-03 16:23:50,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2018-12-03 16:23:50,626 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:23:50,627 INFO L402 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 1, 1, 1] [2018-12-03 16:23:50,627 INFO L423 AbstractCegarLoop]: === Iteration 96 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:23:50,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:23:50,627 INFO L82 PathProgramCache]: Analyzing trace with hash -281174400, now seen corresponding path program 94 times [2018-12-03 16:23:50,627 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:23:50,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:23:50,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:23:50,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:23:50,628 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:23:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:23:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 21949 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:23:54,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:23:54,842 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:23:54,842 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:23:54,843 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:23:54,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:23:54,843 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:23:54,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:23:54,852 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:23:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:23:54,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:24:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 21949 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:24:01,778 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:24:07,164 INFO L134 CoverageAnalysis]: Checked inductivity of 21949 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:24:07,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:24:07,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 208 [2018-12-03 16:24:07,183 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:24:07,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2018-12-03 16:24:07,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2018-12-03 16:24:07,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17271, Invalid=26201, Unknown=0, NotChecked=0, Total=43472 [2018-12-03 16:24:07,187 INFO L87 Difference]: Start difference. First operand 474 states and 662 transitions. Second operand 192 states.