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_compound_exp_cong.epf -i ../../../trunk/examples/programs/real-life/RailwayCrossing.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 15:07:33,056 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 15:07:33,058 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 15:07:33,074 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 15:07:33,074 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 15:07:33,076 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 15:07:33,077 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 15:07:33,080 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 15:07:33,083 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 15:07:33,084 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 15:07:33,092 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-12-03 15:07:33,118 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2018-12-03 15:07:33,131 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 15:07:33,131 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 15:07:33,132 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 15:07:33,132 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 15:07:33,132 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 15:07:33,132 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 15:07:33,133 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 15:07:33,133 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 15:07:33,133 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 15:07:33,133 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 15:07:33,133 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 15:07:33,134 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 15:07:33,134 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 15:07:33,134 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 15:07:33,134 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 15:07:33,135 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 15:07:33,135 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 15:07:33,135 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 15:07:33,136 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 15:07:33,136 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 15:07:33,136 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 15:07:33,136 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 15:07:33,136 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 15:07:33,136 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 15:07:33,137 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 15:07:33,137 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 15:07:33,137 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 15:07:33,137 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 15:07:33,137 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 15:07:33,138 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 15:07:33,138 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 15:07:33,138 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 15:07:33,138 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 15:07:33,139 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 15:07:33,139 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 15:07:33,139 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 15:07:33,139 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 15:07:33,139 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 15:07:33,140 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 15:07:33,140 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 15:07:33,140 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 15:07:33,172 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 15:07:33,185 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 15:07:33,189 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 15:07:33,191 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 15:07:33,191 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 15:07:33,192 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/RailwayCrossing.bpl [2018-12-03 15:07:33,192 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/RailwayCrossing.bpl' [2018-12-03 15:07:33,234 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 15:07:33,236 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 15:07:33,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 15:07:33,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 15:07:33,237 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 15:07:33,256 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 03:07:33" (1/1) ... [2018-12-03 15:07:33,266 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 03:07:33" (1/1) ... [2018-12-03 15:07:33,274 WARN L165 Inliner]: Program contained no entry procedure! [2018-12-03 15:07:33,275 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-12-03 15:07:33,275 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-12-03 15:07:33,278 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 15:07:33,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 15:07:33,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 15:07:33,280 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 15:07:33,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:07:33" (1/1) ... [2018-12-03 15:07:33,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:07:33" (1/1) ... [2018-12-03 15:07:33,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:07:33" (1/1) ... [2018-12-03 15:07:33,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:07:33" (1/1) ... [2018-12-03 15:07:33,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:07:33" (1/1) ... [2018-12-03 15:07:33,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:07:33" (1/1) ... [2018-12-03 15:07:33,300 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:07:33" (1/1) ... [2018-12-03 15:07:33,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 15:07:33,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 15:07:33,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 15:07:33,303 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 15:07:33,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:07:33" (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 15:07:33,374 INFO L124 BoogieDeclarations]: Specification and implementation of procedure GateController given in one single declaration [2018-12-03 15:07:33,374 INFO L130 BoogieDeclarations]: Found specification of procedure GateController [2018-12-03 15:07:33,374 INFO L138 BoogieDeclarations]: Found implementation of procedure GateController [2018-12-03 15:07:33,706 INFO L272 CfgBuilder]: Using library mode [2018-12-03 15:07:33,706 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-03 15:07:33,707 INFO L202 PluginConnector]: Adding new model RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:07:33 BoogieIcfgContainer [2018-12-03 15:07:33,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 15:07:33,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 15:07:33,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 15:07:33,714 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 15:07:33,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:07:33" (1/2) ... [2018-12-03 15:07:33,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a303e46 and model type RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 03:07:33, skipping insertion in model container [2018-12-03 15:07:33,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:07:33" (2/2) ... [2018-12-03 15:07:33,719 INFO L112 eAbstractionObserver]: Analyzing ICFG RailwayCrossing.bpl [2018-12-03 15:07:33,729 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 15:07:33,740 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 15:07:33,761 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 15:07:33,807 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 15:07:33,807 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 15:07:33,808 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 15:07:33,808 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 15:07:33,808 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 15:07:33,808 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 15:07:33,808 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 15:07:33,808 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 15:07:33,827 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-12-03 15:07:33,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-03 15:07:33,842 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:33,843 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-03 15:07:33,849 INFO L423 AbstractCegarLoop]: === Iteration 1 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:33,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:33,856 INFO L82 PathProgramCache]: Analyzing trace with hash 30496, now seen corresponding path program 1 times [2018-12-03 15:07:33,860 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:33,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:33,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:33,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:33,921 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:33,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:34,017 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 15:07:34,020 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 15:07:34,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 15:07:34,021 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 15:07:34,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 15:07:34,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 15:07:34,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 15:07:34,048 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-12-03 15:07:34,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:34,147 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-12-03 15:07:34,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 15:07:34,149 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-03 15:07:34,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:34,162 INFO L225 Difference]: With dead ends: 19 [2018-12-03 15:07:34,162 INFO L226 Difference]: Without dead ends: 13 [2018-12-03 15:07:34,167 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 15:07:34,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-03 15:07:34,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 9. [2018-12-03 15:07:34,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-03 15:07:34,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2018-12-03 15:07:34,207 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 3 [2018-12-03 15:07:34,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:34,207 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 12 transitions. [2018-12-03 15:07:34,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 15:07:34,207 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2018-12-03 15:07:34,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-03 15:07:34,208 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:34,208 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-03 15:07:34,208 INFO L423 AbstractCegarLoop]: === Iteration 2 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:34,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:34,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1863215691, now seen corresponding path program 1 times [2018-12-03 15:07:34,209 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:34,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:34,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:34,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:34,211 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:34,242 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 15:07:34,243 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 15:07:34,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 15:07:34,243 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 15:07:34,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 15:07:34,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 15:07:34,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 15:07:34,246 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand 3 states. [2018-12-03 15:07:34,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:34,263 INFO L93 Difference]: Finished difference Result 16 states and 22 transitions. [2018-12-03 15:07:34,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 15:07:34,264 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-12-03 15:07:34,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:34,265 INFO L225 Difference]: With dead ends: 16 [2018-12-03 15:07:34,265 INFO L226 Difference]: Without dead ends: 9 [2018-12-03 15:07:34,266 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 15:07:34,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-12-03 15:07:34,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-12-03 15:07:34,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-03 15:07:34,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2018-12-03 15:07:34,269 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2018-12-03 15:07:34,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:34,270 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2018-12-03 15:07:34,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 15:07:34,270 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2018-12-03 15:07:34,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-03 15:07:34,271 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:34,271 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 15:07:34,271 INFO L423 AbstractCegarLoop]: === Iteration 3 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:34,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:34,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1926837521, now seen corresponding path program 1 times [2018-12-03 15:07:34,272 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:34,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:34,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:34,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:34,273 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:34,336 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 15:07:34,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:34,336 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:34,337 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 9 with the following transitions: [2018-12-03 15:07:34,341 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [13], [16], [20], [22], [23] [2018-12-03 15:07:34,385 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 15:07:34,385 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 15:07:34,598 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 15:07:34,599 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 15:07:34,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:34,642 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 15:07:34,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:34,642 INFO 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 15:07:34,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:34,656 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:07:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:34,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:35,014 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 15:07:35,015 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:35,101 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 15:07:35,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:35,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2018-12-03 15:07:35,120 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:35,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-03 15:07:35,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-03 15:07:35,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2018-12-03 15:07:35,122 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 6 states. [2018-12-03 15:07:35,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:35,170 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2018-12-03 15:07:35,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 15:07:35,171 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2018-12-03 15:07:35,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:35,172 INFO L225 Difference]: With dead ends: 20 [2018-12-03 15:07:35,172 INFO L226 Difference]: Without dead ends: 18 [2018-12-03 15:07:35,173 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 15:07:35,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-12-03 15:07:35,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2018-12-03 15:07:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-03 15:07:35,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2018-12-03 15:07:35,180 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2018-12-03 15:07:35,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:35,180 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2018-12-03 15:07:35,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-03 15:07:35,181 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2018-12-03 15:07:35,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-03 15:07:35,182 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:35,182 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1] [2018-12-03 15:07:35,182 INFO L423 AbstractCegarLoop]: === Iteration 4 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:35,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:35,183 INFO L82 PathProgramCache]: Analyzing trace with hash 640583104, now seen corresponding path program 2 times [2018-12-03 15:07:35,183 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:35,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:35,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:35,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:35,185 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:35,355 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 15:07:35,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:35,358 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:35,358 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:35,359 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:35,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:35,359 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:07:35,372 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:07:35,373 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:07:35,386 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-03 15:07:35,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:07:35,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:35,741 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 15:07:35,742 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:35,836 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 15:07:35,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:35,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2018-12-03 15:07:35,863 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:35,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 15:07:35,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 15:07:35,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2018-12-03 15:07:35,865 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand 8 states. [2018-12-03 15:07:35,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:35,924 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2018-12-03 15:07:35,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 15:07:35,925 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-12-03 15:07:35,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:35,926 INFO L225 Difference]: With dead ends: 25 [2018-12-03 15:07:35,927 INFO L226 Difference]: Without dead ends: 23 [2018-12-03 15:07:35,928 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 15:07:35,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-03 15:07:35,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-12-03 15:07:35,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-03 15:07:35,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2018-12-03 15:07:35,934 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 13 [2018-12-03 15:07:35,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:35,935 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-12-03 15:07:35,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 15:07:35,935 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2018-12-03 15:07:35,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-03 15:07:35,936 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:35,936 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1] [2018-12-03 15:07:35,936 INFO L423 AbstractCegarLoop]: === Iteration 5 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:35,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:35,937 INFO L82 PathProgramCache]: Analyzing trace with hash -297055631, now seen corresponding path program 3 times [2018-12-03 15:07:35,937 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:35,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:35,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:07:35,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:35,939 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:35,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:36,049 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 15:07:36,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:36,049 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:36,050 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:36,050 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:36,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:36,050 INFO 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 15:07:36,063 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:07:36,063 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:07:36,093 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:07:36,093 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:07:36,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:36,368 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 15:07:36,369 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:36,499 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 15:07:36,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:36,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2018-12-03 15:07:36,519 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:36,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-03 15:07:36,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-03 15:07:36,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=97, Unknown=0, NotChecked=0, Total=182 [2018-12-03 15:07:36,520 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 10 states. [2018-12-03 15:07:36,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:36,563 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2018-12-03 15:07:36,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-03 15:07:36,564 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-12-03 15:07:36,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:36,565 INFO L225 Difference]: With dead ends: 30 [2018-12-03 15:07:36,565 INFO L226 Difference]: Without dead ends: 28 [2018-12-03 15:07:36,566 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=97, Unknown=0, NotChecked=0, Total=182 [2018-12-03 15:07:36,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-03 15:07:36,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2018-12-03 15:07:36,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-03 15:07:36,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2018-12-03 15:07:36,572 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 18 [2018-12-03 15:07:36,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:36,573 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2018-12-03 15:07:36,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-03 15:07:36,573 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2018-12-03 15:07:36,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-03 15:07:36,574 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:36,574 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1] [2018-12-03 15:07:36,575 INFO L423 AbstractCegarLoop]: === Iteration 6 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:36,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:36,575 INFO L82 PathProgramCache]: Analyzing trace with hash 2073218144, now seen corresponding path program 4 times [2018-12-03 15:07:36,575 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:36,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:36,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:07:36,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:36,577 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:36,733 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 15:07:36,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:36,733 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:36,734 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:36,734 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:36,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:36,734 INFO 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 15:07:36,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:36,761 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:07:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:36,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:37,230 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 15:07:37,230 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:37,364 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 15:07:37,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:37,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2018-12-03 15:07:37,386 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:37,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-03 15:07:37,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-03 15:07:37,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2018-12-03 15:07:37,387 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 12 states. [2018-12-03 15:07:37,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:37,654 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2018-12-03 15:07:37,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-03 15:07:37,654 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-12-03 15:07:37,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:37,655 INFO L225 Difference]: With dead ends: 35 [2018-12-03 15:07:37,655 INFO L226 Difference]: Without dead ends: 33 [2018-12-03 15:07:37,656 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 15:07:37,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-03 15:07:37,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2018-12-03 15:07:37,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-03 15:07:37,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2018-12-03 15:07:37,662 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 23 [2018-12-03 15:07:37,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:37,662 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2018-12-03 15:07:37,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-03 15:07:37,663 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2018-12-03 15:07:37,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-03 15:07:37,664 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:37,664 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1] [2018-12-03 15:07:37,664 INFO L423 AbstractCegarLoop]: === Iteration 7 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:37,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:37,664 INFO L82 PathProgramCache]: Analyzing trace with hash -609605679, now seen corresponding path program 5 times [2018-12-03 15:07:37,665 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:37,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:37,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:37,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:37,666 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:37,860 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 15:07:37,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:37,861 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:37,861 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:37,861 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:37,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:37,862 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 15:07:37,870 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:07:37,870 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:07:37,886 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-03 15:07:37,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:07:37,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:38,355 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 15:07:38,356 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:38,808 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 15:07:38,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:38,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2018-12-03 15:07:38,838 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:38,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-03 15:07:38,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-03 15:07:38,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=205, Unknown=0, NotChecked=0, Total=380 [2018-12-03 15:07:38,839 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand 14 states. [2018-12-03 15:07:38,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:38,970 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2018-12-03 15:07:38,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-03 15:07:38,971 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2018-12-03 15:07:38,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:38,973 INFO L225 Difference]: With dead ends: 40 [2018-12-03 15:07:38,973 INFO L226 Difference]: Without dead ends: 38 [2018-12-03 15:07:38,974 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 15:07:38,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-03 15:07:38,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2018-12-03 15:07:38,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-03 15:07:38,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2018-12-03 15:07:38,982 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 28 [2018-12-03 15:07:38,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:38,982 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2018-12-03 15:07:38,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-03 15:07:38,982 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2018-12-03 15:07:38,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-03 15:07:38,983 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:38,983 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1] [2018-12-03 15:07:38,984 INFO L423 AbstractCegarLoop]: === Iteration 8 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:38,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:38,984 INFO L82 PathProgramCache]: Analyzing trace with hash -70825216, now seen corresponding path program 6 times [2018-12-03 15:07:38,984 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:38,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:38,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:07:38,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:38,986 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:39,177 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 15:07:39,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:39,177 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:39,178 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:39,178 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:39,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:39,178 INFO 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 15:07:39,198 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:07:39,198 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:07:39,299 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:07:39,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:07:39,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:39,607 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 15:07:39,607 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:39,881 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 15:07:39,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:39,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2018-12-03 15:07:39,901 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:39,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-03 15:07:39,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-03 15:07:39,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=274, Unknown=0, NotChecked=0, Total=506 [2018-12-03 15:07:39,903 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand 16 states. [2018-12-03 15:07:39,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:39,986 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2018-12-03 15:07:39,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-03 15:07:39,987 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2018-12-03 15:07:39,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:39,988 INFO L225 Difference]: With dead ends: 45 [2018-12-03 15:07:39,988 INFO L226 Difference]: Without dead ends: 43 [2018-12-03 15:07:39,989 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=232, Invalid=274, Unknown=0, NotChecked=0, Total=506 [2018-12-03 15:07:39,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-03 15:07:39,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-12-03 15:07:39,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-03 15:07:39,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2018-12-03 15:07:39,996 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 33 [2018-12-03 15:07:39,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:39,996 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2018-12-03 15:07:39,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-03 15:07:39,996 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2018-12-03 15:07:39,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-03 15:07:39,997 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:39,997 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1] [2018-12-03 15:07:39,998 INFO L423 AbstractCegarLoop]: === Iteration 9 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:39,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:39,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1872481585, now seen corresponding path program 7 times [2018-12-03 15:07:39,998 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:39,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:39,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:07:39,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:40,000 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:40,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:40,249 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 15:07:40,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:40,249 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:40,249 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:40,249 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:40,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:40,250 INFO 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 15:07:40,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:40,260 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:07:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:40,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:40,618 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 15:07:40,619 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:40,949 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 15:07:40,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:40,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2018-12-03 15:07:40,968 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:40,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-03 15:07:40,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-03 15:07:40,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=353, Unknown=0, NotChecked=0, Total=650 [2018-12-03 15:07:40,969 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 18 states. [2018-12-03 15:07:41,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:41,049 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2018-12-03 15:07:41,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-03 15:07:41,050 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2018-12-03 15:07:41,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:41,051 INFO L225 Difference]: With dead ends: 50 [2018-12-03 15:07:41,052 INFO L226 Difference]: Without dead ends: 48 [2018-12-03 15:07:41,053 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=297, Invalid=353, Unknown=0, NotChecked=0, Total=650 [2018-12-03 15:07:41,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-03 15:07:41,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2018-12-03 15:07:41,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-03 15:07:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-12-03 15:07:41,059 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 38 [2018-12-03 15:07:41,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:41,059 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-12-03 15:07:41,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-03 15:07:41,060 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-12-03 15:07:41,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-03 15:07:41,061 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:41,061 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1] [2018-12-03 15:07:41,061 INFO L423 AbstractCegarLoop]: === Iteration 10 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:41,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:41,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1776681376, now seen corresponding path program 8 times [2018-12-03 15:07:41,062 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:41,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:41,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:41,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:41,063 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:41,188 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 15:07:41,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:41,188 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:41,188 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:41,189 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:41,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:41,189 INFO 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 15:07:41,204 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:07:41,205 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:07:41,252 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-03 15:07:41,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:07:41,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:41,591 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 15:07:41,592 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:41,856 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 15:07:41,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:41,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2018-12-03 15:07:41,876 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:41,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-03 15:07:41,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-03 15:07:41,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=442, Unknown=0, NotChecked=0, Total=812 [2018-12-03 15:07:41,878 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 20 states. [2018-12-03 15:07:41,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:41,962 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2018-12-03 15:07:41,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-03 15:07:41,963 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2018-12-03 15:07:41,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:41,963 INFO L225 Difference]: With dead ends: 55 [2018-12-03 15:07:41,964 INFO L226 Difference]: Without dead ends: 53 [2018-12-03 15:07:41,965 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=370, Invalid=442, Unknown=0, NotChecked=0, Total=812 [2018-12-03 15:07:41,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-03 15:07:41,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2018-12-03 15:07:41,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-03 15:07:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2018-12-03 15:07:41,972 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 43 [2018-12-03 15:07:41,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:41,972 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2018-12-03 15:07:41,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-03 15:07:41,972 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2018-12-03 15:07:41,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-12-03 15:07:41,974 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:41,974 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1] [2018-12-03 15:07:41,974 INFO L423 AbstractCegarLoop]: === Iteration 11 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:41,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:41,974 INFO L82 PathProgramCache]: Analyzing trace with hash -951698799, now seen corresponding path program 9 times [2018-12-03 15:07:41,974 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:41,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:41,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:07:41,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:41,976 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:42,147 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 15:07:42,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:42,147 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:42,147 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:42,147 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:42,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:42,148 INFO 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 15:07:42,157 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:07:42,158 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:07:42,183 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:07:42,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:07:42,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:43,033 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 15:07:43,033 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:43,296 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 15:07:43,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:43,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2018-12-03 15:07:43,317 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:43,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-03 15:07:43,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-03 15:07:43,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=541, Unknown=0, NotChecked=0, Total=992 [2018-12-03 15:07:43,319 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand 22 states. [2018-12-03 15:07:43,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:43,451 INFO L93 Difference]: Finished difference Result 60 states and 82 transitions. [2018-12-03 15:07:43,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-03 15:07:43,451 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2018-12-03 15:07:43,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:43,453 INFO L225 Difference]: With dead ends: 60 [2018-12-03 15:07:43,453 INFO L226 Difference]: Without dead ends: 58 [2018-12-03 15:07:43,454 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=451, Invalid=541, Unknown=0, NotChecked=0, Total=992 [2018-12-03 15:07:43,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-03 15:07:43,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2018-12-03 15:07:43,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-12-03 15:07:43,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2018-12-03 15:07:43,460 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 48 [2018-12-03 15:07:43,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:43,461 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2018-12-03 15:07:43,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-03 15:07:43,461 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2018-12-03 15:07:43,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-03 15:07:43,462 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:43,462 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1] [2018-12-03 15:07:43,462 INFO L423 AbstractCegarLoop]: === Iteration 12 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:43,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:43,463 INFO L82 PathProgramCache]: Analyzing trace with hash -259461056, now seen corresponding path program 10 times [2018-12-03 15:07:43,463 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:43,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:43,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:07:43,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:43,464 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:43,692 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 15:07:43,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:43,692 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:43,693 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:43,693 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:43,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:43,693 INFO 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 15:07:43,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:43,706 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:07:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:43,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:44,107 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 15:07:44,107 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:44,408 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 15:07:44,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:44,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2018-12-03 15:07:44,428 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:44,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-03 15:07:44,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-03 15:07:44,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=650, Unknown=0, NotChecked=0, Total=1190 [2018-12-03 15:07:44,430 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 24 states. [2018-12-03 15:07:44,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:44,632 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2018-12-03 15:07:44,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-03 15:07:44,632 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2018-12-03 15:07:44,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:44,633 INFO L225 Difference]: With dead ends: 65 [2018-12-03 15:07:44,633 INFO L226 Difference]: Without dead ends: 63 [2018-12-03 15:07:44,634 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=540, Invalid=650, Unknown=0, NotChecked=0, Total=1190 [2018-12-03 15:07:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-03 15:07:44,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-12-03 15:07:44,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-03 15:07:44,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2018-12-03 15:07:44,642 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 53 [2018-12-03 15:07:44,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:44,642 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2018-12-03 15:07:44,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-03 15:07:44,642 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2018-12-03 15:07:44,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-12-03 15:07:44,643 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:44,644 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1] [2018-12-03 15:07:44,644 INFO L423 AbstractCegarLoop]: === Iteration 13 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:44,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:44,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1213165553, now seen corresponding path program 11 times [2018-12-03 15:07:44,644 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:44,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:44,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:44,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:44,646 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:44,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:45,109 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 15:07:45,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:45,109 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:45,109 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:45,109 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:45,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:45,110 INFO 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 15:07:45,118 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:07:45,118 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:07:45,143 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-12-03 15:07:45,144 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:07:45,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:45,545 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 15:07:45,545 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:45,962 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 15:07:45,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:45,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2018-12-03 15:07:45,989 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:45,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-12-03 15:07:45,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-12-03 15:07:45,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=769, Unknown=0, NotChecked=0, Total=1406 [2018-12-03 15:07:45,990 INFO L87 Difference]: Start difference. First operand 59 states and 81 transitions. Second operand 26 states. [2018-12-03 15:07:46,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:46,093 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2018-12-03 15:07:46,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-03 15:07:46,094 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2018-12-03 15:07:46,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:46,094 INFO L225 Difference]: With dead ends: 70 [2018-12-03 15:07:46,094 INFO L226 Difference]: Without dead ends: 68 [2018-12-03 15:07:46,095 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=637, Invalid=769, Unknown=0, NotChecked=0, Total=1406 [2018-12-03 15:07:46,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-03 15:07:46,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2018-12-03 15:07:46,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-03 15:07:46,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2018-12-03 15:07:46,101 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 58 [2018-12-03 15:07:46,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:46,102 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 88 transitions. [2018-12-03 15:07:46,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-12-03 15:07:46,102 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 88 transitions. [2018-12-03 15:07:46,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-03 15:07:46,103 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:46,103 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1] [2018-12-03 15:07:46,103 INFO L423 AbstractCegarLoop]: === Iteration 14 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:46,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:46,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1043720480, now seen corresponding path program 12 times [2018-12-03 15:07:46,104 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:46,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:46,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:07:46,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:46,105 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:46,348 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 15:07:46,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:46,349 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:46,349 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:46,349 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:46,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:46,349 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 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 15:07:46,358 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:07:46,358 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:07:46,394 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:07:46,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:07:46,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:46,783 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 15:07:46,783 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:47,103 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 15:07:47,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:47,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2018-12-03 15:07:47,122 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:47,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-12-03 15:07:47,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-12-03 15:07:47,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=742, Invalid=898, Unknown=0, NotChecked=0, Total=1640 [2018-12-03 15:07:47,124 INFO L87 Difference]: Start difference. First operand 64 states and 88 transitions. Second operand 28 states. [2018-12-03 15:07:47,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:47,253 INFO L93 Difference]: Finished difference Result 75 states and 103 transitions. [2018-12-03 15:07:47,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-03 15:07:47,254 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2018-12-03 15:07:47,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:47,255 INFO L225 Difference]: With dead ends: 75 [2018-12-03 15:07:47,255 INFO L226 Difference]: Without dead ends: 73 [2018-12-03 15:07:47,258 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=742, Invalid=898, Unknown=0, NotChecked=0, Total=1640 [2018-12-03 15:07:47,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-12-03 15:07:47,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2018-12-03 15:07:47,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-12-03 15:07:47,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 95 transitions. [2018-12-03 15:07:47,268 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 95 transitions. Word has length 63 [2018-12-03 15:07:47,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:47,270 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 95 transitions. [2018-12-03 15:07:47,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-12-03 15:07:47,270 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 95 transitions. [2018-12-03 15:07:47,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-12-03 15:07:47,271 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:47,272 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1] [2018-12-03 15:07:47,272 INFO L423 AbstractCegarLoop]: === Iteration 15 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:47,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:47,272 INFO L82 PathProgramCache]: Analyzing trace with hash 14511441, now seen corresponding path program 13 times [2018-12-03 15:07:47,272 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:47,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:47,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:07:47,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:47,274 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:47,735 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 15:07:47,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:47,735 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:47,735 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:47,735 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:47,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:47,736 INFO 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 15:07:47,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:47,745 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:07:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:47,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:48,155 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 15:07:48,155 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:48,928 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 15:07:48,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:48,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2018-12-03 15:07:48,947 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:48,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-12-03 15:07:48,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-12-03 15:07:48,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=855, Invalid=1037, Unknown=0, NotChecked=0, Total=1892 [2018-12-03 15:07:48,949 INFO L87 Difference]: Start difference. First operand 69 states and 95 transitions. Second operand 30 states. [2018-12-03 15:07:49,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:49,070 INFO L93 Difference]: Finished difference Result 80 states and 110 transitions. [2018-12-03 15:07:49,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-03 15:07:49,070 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2018-12-03 15:07:49,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:49,071 INFO L225 Difference]: With dead ends: 80 [2018-12-03 15:07:49,071 INFO L226 Difference]: Without dead ends: 78 [2018-12-03 15:07:49,072 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=855, Invalid=1037, Unknown=0, NotChecked=0, Total=1892 [2018-12-03 15:07:49,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-12-03 15:07:49,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2018-12-03 15:07:49,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-12-03 15:07:49,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 102 transitions. [2018-12-03 15:07:49,079 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 102 transitions. Word has length 68 [2018-12-03 15:07:49,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:49,079 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 102 transitions. [2018-12-03 15:07:49,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-12-03 15:07:49,080 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 102 transitions. [2018-12-03 15:07:49,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-03 15:07:49,080 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:49,081 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1] [2018-12-03 15:07:49,081 INFO L423 AbstractCegarLoop]: === Iteration 16 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:49,081 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:49,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1220315776, now seen corresponding path program 14 times [2018-12-03 15:07:49,081 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:49,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:49,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:49,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:49,082 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:49,485 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 15:07:49,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:49,485 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:49,485 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:49,486 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:49,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:49,486 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:07:49,503 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:07:49,504 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:07:49,705 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-12-03 15:07:49,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:07:49,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:50,328 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 15:07:50,329 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:50,749 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 15:07:50,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:50,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2018-12-03 15:07:50,768 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:50,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-12-03 15:07:50,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-12-03 15:07:50,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=976, Invalid=1186, Unknown=0, NotChecked=0, Total=2162 [2018-12-03 15:07:50,770 INFO L87 Difference]: Start difference. First operand 74 states and 102 transitions. Second operand 32 states. [2018-12-03 15:07:50,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:50,923 INFO L93 Difference]: Finished difference Result 85 states and 117 transitions. [2018-12-03 15:07:50,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-03 15:07:50,924 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 73 [2018-12-03 15:07:50,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:50,925 INFO L225 Difference]: With dead ends: 85 [2018-12-03 15:07:50,926 INFO L226 Difference]: Without dead ends: 83 [2018-12-03 15:07:50,927 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=976, Invalid=1186, Unknown=0, NotChecked=0, Total=2162 [2018-12-03 15:07:50,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-12-03 15:07:50,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-12-03 15:07:50,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-12-03 15:07:50,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2018-12-03 15:07:50,934 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 73 [2018-12-03 15:07:50,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:50,934 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2018-12-03 15:07:50,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-12-03 15:07:50,935 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2018-12-03 15:07:50,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-12-03 15:07:50,936 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:50,936 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1] [2018-12-03 15:07:50,936 INFO L423 AbstractCegarLoop]: === Iteration 17 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:50,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:50,937 INFO L82 PathProgramCache]: Analyzing trace with hash 127283889, now seen corresponding path program 15 times [2018-12-03 15:07:50,937 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:50,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:50,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:07:50,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:50,938 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:51,886 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 15:07:51,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:51,887 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:51,887 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:51,887 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:51,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:51,887 INFO 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 15:07:51,896 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:07:51,897 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:07:51,922 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:07:51,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:07:51,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:52,377 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 15:07:52,377 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:52,983 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 15:07:53,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:53,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2018-12-03 15:07:53,003 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:53,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-12-03 15:07:53,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-12-03 15:07:53,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1105, Invalid=1345, Unknown=0, NotChecked=0, Total=2450 [2018-12-03 15:07:53,005 INFO L87 Difference]: Start difference. First operand 79 states and 109 transitions. Second operand 34 states. [2018-12-03 15:07:53,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:53,207 INFO L93 Difference]: Finished difference Result 90 states and 124 transitions. [2018-12-03 15:07:53,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-03 15:07:53,208 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2018-12-03 15:07:53,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:53,209 INFO L225 Difference]: With dead ends: 90 [2018-12-03 15:07:53,209 INFO L226 Difference]: Without dead ends: 88 [2018-12-03 15:07:53,210 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1105, Invalid=1345, Unknown=0, NotChecked=0, Total=2450 [2018-12-03 15:07:53,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-12-03 15:07:53,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2018-12-03 15:07:53,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-12-03 15:07:53,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 116 transitions. [2018-12-03 15:07:53,216 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 116 transitions. Word has length 78 [2018-12-03 15:07:53,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:53,217 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 116 transitions. [2018-12-03 15:07:53,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-12-03 15:07:53,217 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 116 transitions. [2018-12-03 15:07:53,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-12-03 15:07:53,218 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:53,218 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1] [2018-12-03 15:07:53,218 INFO L423 AbstractCegarLoop]: === Iteration 18 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:53,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:53,218 INFO L82 PathProgramCache]: Analyzing trace with hash -233894880, now seen corresponding path program 16 times [2018-12-03 15:07:53,218 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:53,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:53,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:07:53,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:53,220 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:53,472 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 15:07:53,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:53,473 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:53,473 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:53,473 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:53,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:53,473 INFO 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 15:07:53,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:53,483 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:07:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:53,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:53,990 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 15:07:53,990 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:54,360 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 15:07:54,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:54,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2018-12-03 15:07:54,379 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:54,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-03 15:07:54,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-03 15:07:54,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=1514, Unknown=0, NotChecked=0, Total=2756 [2018-12-03 15:07:54,381 INFO L87 Difference]: Start difference. First operand 84 states and 116 transitions. Second operand 36 states. [2018-12-03 15:07:54,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:54,524 INFO L93 Difference]: Finished difference Result 95 states and 131 transitions. [2018-12-03 15:07:54,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-03 15:07:54,532 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 83 [2018-12-03 15:07:54,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:54,533 INFO L225 Difference]: With dead ends: 95 [2018-12-03 15:07:54,533 INFO L226 Difference]: Without dead ends: 93 [2018-12-03 15:07:54,534 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1242, Invalid=1514, Unknown=0, NotChecked=0, Total=2756 [2018-12-03 15:07:54,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-12-03 15:07:54,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2018-12-03 15:07:54,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-03 15:07:54,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 123 transitions. [2018-12-03 15:07:54,544 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 123 transitions. Word has length 83 [2018-12-03 15:07:54,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:54,544 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 123 transitions. [2018-12-03 15:07:54,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-03 15:07:54,544 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 123 transitions. [2018-12-03 15:07:54,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-12-03 15:07:54,545 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:54,545 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1] [2018-12-03 15:07:54,545 INFO L423 AbstractCegarLoop]: === Iteration 19 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:54,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:54,548 INFO L82 PathProgramCache]: Analyzing trace with hash -610287599, now seen corresponding path program 17 times [2018-12-03 15:07:54,548 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:54,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:54,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:54,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:54,549 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:54,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:54,786 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 15:07:54,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:54,787 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:54,787 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:54,787 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:54,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:54,787 INFO 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 15:07:54,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:07:54,796 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:07:54,829 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-12-03 15:07:54,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:07:54,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:55,575 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 15:07:55,576 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:56,011 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 15:07:56,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:56,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2018-12-03 15:07:56,031 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:56,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-12-03 15:07:56,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-12-03 15:07:56,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1387, Invalid=1693, Unknown=0, NotChecked=0, Total=3080 [2018-12-03 15:07:56,033 INFO L87 Difference]: Start difference. First operand 89 states and 123 transitions. Second operand 38 states. [2018-12-03 15:07:56,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:56,137 INFO L93 Difference]: Finished difference Result 100 states and 138 transitions. [2018-12-03 15:07:56,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-03 15:07:56,138 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 88 [2018-12-03 15:07:56,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:56,139 INFO L225 Difference]: With dead ends: 100 [2018-12-03 15:07:56,139 INFO L226 Difference]: Without dead ends: 98 [2018-12-03 15:07:56,141 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1387, Invalid=1693, Unknown=0, NotChecked=0, Total=3080 [2018-12-03 15:07:56,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-12-03 15:07:56,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2018-12-03 15:07:56,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-12-03 15:07:56,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 130 transitions. [2018-12-03 15:07:56,146 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 130 transitions. Word has length 88 [2018-12-03 15:07:56,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:56,146 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 130 transitions. [2018-12-03 15:07:56,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-12-03 15:07:56,146 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 130 transitions. [2018-12-03 15:07:56,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-12-03 15:07:56,147 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:56,147 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1] [2018-12-03 15:07:56,147 INFO L423 AbstractCegarLoop]: === Iteration 20 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:56,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:56,148 INFO L82 PathProgramCache]: Analyzing trace with hash 2059852480, now seen corresponding path program 18 times [2018-12-03 15:07:56,148 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:56,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:56,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:07:56,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:56,149 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:56,420 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 15:07:56,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:56,421 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:56,421 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:56,421 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:56,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:56,421 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:07:56,431 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:07:56,431 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:07:56,454 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:07:56,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:07:56,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:57,002 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 15:07:57,002 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:57,531 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 15:07:57,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:57,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2018-12-03 15:07:57,550 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:57,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-12-03 15:07:57,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-12-03 15:07:57,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1882, Unknown=0, NotChecked=0, Total=3422 [2018-12-03 15:07:57,552 INFO L87 Difference]: Start difference. First operand 94 states and 130 transitions. Second operand 40 states. [2018-12-03 15:07:57,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:57,660 INFO L93 Difference]: Finished difference Result 105 states and 145 transitions. [2018-12-03 15:07:57,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-03 15:07:57,661 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 93 [2018-12-03 15:07:57,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:57,662 INFO L225 Difference]: With dead ends: 105 [2018-12-03 15:07:57,662 INFO L226 Difference]: Without dead ends: 103 [2018-12-03 15:07:57,663 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1882, Unknown=0, NotChecked=0, Total=3422 [2018-12-03 15:07:57,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-12-03 15:07:57,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-12-03 15:07:57,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-12-03 15:07:57,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 137 transitions. [2018-12-03 15:07:57,667 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 137 transitions. Word has length 93 [2018-12-03 15:07:57,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:57,668 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 137 transitions. [2018-12-03 15:07:57,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-12-03 15:07:57,668 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 137 transitions. [2018-12-03 15:07:57,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-12-03 15:07:57,669 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:57,669 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1] [2018-12-03 15:07:57,669 INFO L423 AbstractCegarLoop]: === Iteration 21 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:57,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:57,669 INFO L82 PathProgramCache]: Analyzing trace with hash -996141711, now seen corresponding path program 19 times [2018-12-03 15:07:57,670 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:57,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:57,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:07:57,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:57,671 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:57,994 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 15:07:57,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:57,995 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:57,995 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:57,995 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:57,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:57,995 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:07:58,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:58,005 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:07:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:58,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:58,497 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 15:07:58,497 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:59,052 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 15:07:59,072 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:59,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2018-12-03 15:07:59,072 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:59,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-12-03 15:07:59,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-12-03 15:07:59,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1701, Invalid=2081, Unknown=0, NotChecked=0, Total=3782 [2018-12-03 15:07:59,074 INFO L87 Difference]: Start difference. First operand 99 states and 137 transitions. Second operand 42 states. [2018-12-03 15:07:59,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:59,188 INFO L93 Difference]: Finished difference Result 110 states and 152 transitions. [2018-12-03 15:07:59,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-03 15:07:59,188 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 98 [2018-12-03 15:07:59,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:59,190 INFO L225 Difference]: With dead ends: 110 [2018-12-03 15:07:59,190 INFO L226 Difference]: Without dead ends: 108 [2018-12-03 15:07:59,191 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1701, Invalid=2081, Unknown=0, NotChecked=0, Total=3782 [2018-12-03 15:07:59,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-12-03 15:07:59,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2018-12-03 15:07:59,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-12-03 15:07:59,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 144 transitions. [2018-12-03 15:07:59,195 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 144 transitions. Word has length 98 [2018-12-03 15:07:59,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:59,196 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 144 transitions. [2018-12-03 15:07:59,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-12-03 15:07:59,196 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 144 transitions. [2018-12-03 15:07:59,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-12-03 15:07:59,197 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:59,197 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1] [2018-12-03 15:07:59,197 INFO L423 AbstractCegarLoop]: === Iteration 22 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:59,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:59,197 INFO L82 PathProgramCache]: Analyzing trace with hash -511385248, now seen corresponding path program 20 times [2018-12-03 15:07:59,198 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:59,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:59,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:59,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:59,198 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:59,495 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 15:07:59,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:59,496 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:59,496 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:59,496 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:59,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:59,496 INFO 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 15:07:59,508 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:07:59,508 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:07:59,549 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-12-03 15:07:59,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:07:59,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:01,743 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 15:08:01,743 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:02,337 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 15:08:02,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:02,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 64 [2018-12-03 15:08:02,358 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:02,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-12-03 15:08:02,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-12-03 15:08:02,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1870, Invalid=2290, Unknown=0, NotChecked=0, Total=4160 [2018-12-03 15:08:02,363 INFO L87 Difference]: Start difference. First operand 104 states and 144 transitions. Second operand 44 states. [2018-12-03 15:08:02,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:02,588 INFO L93 Difference]: Finished difference Result 115 states and 159 transitions. [2018-12-03 15:08:02,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-03 15:08:02,592 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 103 [2018-12-03 15:08:02,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:02,594 INFO L225 Difference]: With dead ends: 115 [2018-12-03 15:08:02,594 INFO L226 Difference]: Without dead ends: 113 [2018-12-03 15:08:02,596 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1870, Invalid=2290, Unknown=0, NotChecked=0, Total=4160 [2018-12-03 15:08:02,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-12-03 15:08:02,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2018-12-03 15:08:02,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-12-03 15:08:02,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 151 transitions. [2018-12-03 15:08:02,601 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 151 transitions. Word has length 103 [2018-12-03 15:08:02,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:02,601 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 151 transitions. [2018-12-03 15:08:02,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-12-03 15:08:02,601 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 151 transitions. [2018-12-03 15:08:02,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-12-03 15:08:02,602 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:02,602 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1] [2018-12-03 15:08:02,602 INFO L423 AbstractCegarLoop]: === Iteration 23 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:02,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:02,602 INFO L82 PathProgramCache]: Analyzing trace with hash 851260113, now seen corresponding path program 21 times [2018-12-03 15:08:02,603 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:02,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:02,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:08:02,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:02,603 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:02,999 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 15:08:02,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:02,999 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:02,999 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:02,999 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:03,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:03,000 INFO 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 15:08:03,015 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:08:03,016 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:08:03,043 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:08:03,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:08:03,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:03,596 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 15:08:03,596 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:04,380 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 15:08:04,399 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:04,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 67 [2018-12-03 15:08:04,399 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:04,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-12-03 15:08:04,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-12-03 15:08:04,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2047, Invalid=2509, Unknown=0, NotChecked=0, Total=4556 [2018-12-03 15:08:04,401 INFO L87 Difference]: Start difference. First operand 109 states and 151 transitions. Second operand 46 states. [2018-12-03 15:08:04,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:04,520 INFO L93 Difference]: Finished difference Result 120 states and 166 transitions. [2018-12-03 15:08:04,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-03 15:08:04,522 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 108 [2018-12-03 15:08:04,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:04,523 INFO L225 Difference]: With dead ends: 120 [2018-12-03 15:08:04,523 INFO L226 Difference]: Without dead ends: 118 [2018-12-03 15:08:04,524 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2047, Invalid=2509, Unknown=0, NotChecked=0, Total=4556 [2018-12-03 15:08:04,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-12-03 15:08:04,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2018-12-03 15:08:04,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-12-03 15:08:04,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 158 transitions. [2018-12-03 15:08:04,529 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 158 transitions. Word has length 108 [2018-12-03 15:08:04,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:04,530 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 158 transitions. [2018-12-03 15:08:04,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-12-03 15:08:04,530 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 158 transitions. [2018-12-03 15:08:04,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-12-03 15:08:04,531 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:04,531 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1] [2018-12-03 15:08:04,531 INFO L423 AbstractCegarLoop]: === Iteration 24 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:04,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:04,531 INFO L82 PathProgramCache]: Analyzing trace with hash -572317696, now seen corresponding path program 22 times [2018-12-03 15:08:04,531 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:04,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:04,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:08:04,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:04,532 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:04,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:04,998 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 15:08:04,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:04,998 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:04,998 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:04,999 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:04,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:04,999 INFO 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 15:08:05,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:05,010 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:08:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:05,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:05,892 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 15:08:05,892 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:06,589 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 15:08:06,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:06,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2018-12-03 15:08:06,608 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:06,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-12-03 15:08:06,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-12-03 15:08:06,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2232, Invalid=2738, Unknown=0, NotChecked=0, Total=4970 [2018-12-03 15:08:06,609 INFO L87 Difference]: Start difference. First operand 114 states and 158 transitions. Second operand 48 states. [2018-12-03 15:08:06,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:06,959 INFO L93 Difference]: Finished difference Result 125 states and 173 transitions. [2018-12-03 15:08:06,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-03 15:08:06,959 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 113 [2018-12-03 15:08:06,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:06,960 INFO L225 Difference]: With dead ends: 125 [2018-12-03 15:08:06,960 INFO L226 Difference]: Without dead ends: 123 [2018-12-03 15:08:06,961 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2232, Invalid=2738, Unknown=0, NotChecked=0, Total=4970 [2018-12-03 15:08:06,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-12-03 15:08:06,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-12-03 15:08:06,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-12-03 15:08:06,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 165 transitions. [2018-12-03 15:08:06,968 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 165 transitions. Word has length 113 [2018-12-03 15:08:06,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:06,968 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 165 transitions. [2018-12-03 15:08:06,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-12-03 15:08:06,969 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 165 transitions. [2018-12-03 15:08:06,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-12-03 15:08:06,969 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:06,969 INFO L402 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1] [2018-12-03 15:08:06,969 INFO L423 AbstractCegarLoop]: === Iteration 25 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:06,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:06,970 INFO L82 PathProgramCache]: Analyzing trace with hash 513611825, now seen corresponding path program 23 times [2018-12-03 15:08:06,970 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:06,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:06,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:06,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:06,971 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:07,661 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 15:08:07,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:07,662 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:07,662 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:07,662 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:07,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:07,662 INFO 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 15:08:07,670 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:08:07,670 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:08:07,723 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-12-03 15:08:07,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:08:07,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:08,327 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 15:08:08,328 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:09,066 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 15:08:09,085 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:09,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 73 [2018-12-03 15:08:09,085 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:09,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-12-03 15:08:09,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-12-03 15:08:09,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2425, Invalid=2977, Unknown=0, NotChecked=0, Total=5402 [2018-12-03 15:08:09,087 INFO L87 Difference]: Start difference. First operand 119 states and 165 transitions. Second operand 50 states. [2018-12-03 15:08:09,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:09,296 INFO L93 Difference]: Finished difference Result 130 states and 180 transitions. [2018-12-03 15:08:09,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-12-03 15:08:09,297 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 118 [2018-12-03 15:08:09,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:09,298 INFO L225 Difference]: With dead ends: 130 [2018-12-03 15:08:09,298 INFO L226 Difference]: Without dead ends: 128 [2018-12-03 15:08:09,298 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 15:08:09,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-12-03 15:08:09,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2018-12-03 15:08:09,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-12-03 15:08:09,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 172 transitions. [2018-12-03 15:08:09,303 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 172 transitions. Word has length 118 [2018-12-03 15:08:09,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:09,304 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 172 transitions. [2018-12-03 15:08:09,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-12-03 15:08:09,304 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 172 transitions. [2018-12-03 15:08:09,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-12-03 15:08:09,305 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:09,305 INFO L402 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1] [2018-12-03 15:08:09,305 INFO L423 AbstractCegarLoop]: === Iteration 26 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:09,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:09,305 INFO L82 PathProgramCache]: Analyzing trace with hash -285501792, now seen corresponding path program 24 times [2018-12-03 15:08:09,305 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:09,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:09,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:08:09,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:09,306 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:09,758 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 15:08:09,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:09,758 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:09,758 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:09,758 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:09,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:09,759 INFO 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 15:08:09,767 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:08:09,767 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:08:09,801 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:08:09,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:08:09,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:10,854 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 15:08:10,854 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:11,656 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 15:08:11,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:11,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 76 [2018-12-03 15:08:11,676 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:11,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-12-03 15:08:11,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-12-03 15:08:11,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2626, Invalid=3226, Unknown=0, NotChecked=0, Total=5852 [2018-12-03 15:08:11,678 INFO L87 Difference]: Start difference. First operand 124 states and 172 transitions. Second operand 52 states. [2018-12-03 15:08:11,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:11,854 INFO L93 Difference]: Finished difference Result 135 states and 187 transitions. [2018-12-03 15:08:11,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-12-03 15:08:11,855 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 123 [2018-12-03 15:08:11,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:11,856 INFO L225 Difference]: With dead ends: 135 [2018-12-03 15:08:11,856 INFO L226 Difference]: Without dead ends: 133 [2018-12-03 15:08:11,857 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2626, Invalid=3226, Unknown=0, NotChecked=0, Total=5852 [2018-12-03 15:08:11,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-12-03 15:08:11,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2018-12-03 15:08:11,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-12-03 15:08:11,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 179 transitions. [2018-12-03 15:08:11,863 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 179 transitions. Word has length 123 [2018-12-03 15:08:11,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:11,864 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 179 transitions. [2018-12-03 15:08:11,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-12-03 15:08:11,864 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 179 transitions. [2018-12-03 15:08:11,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-12-03 15:08:11,865 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:11,865 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1] [2018-12-03 15:08:11,865 INFO L423 AbstractCegarLoop]: === Iteration 27 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:11,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:11,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1768277393, now seen corresponding path program 25 times [2018-12-03 15:08:11,865 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:11,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:11,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:08:11,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:11,866 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:12,784 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 15:08:12,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:12,784 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:12,784 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:12,784 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:12,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:12,785 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 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 15:08:12,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:12,793 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:08:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:12,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:13,607 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 15:08:13,607 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:14,436 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 15:08:14,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:14,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 79 [2018-12-03 15:08:14,456 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:14,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-12-03 15:08:14,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-12-03 15:08:14,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2835, Invalid=3485, Unknown=0, NotChecked=0, Total=6320 [2018-12-03 15:08:14,458 INFO L87 Difference]: Start difference. First operand 129 states and 179 transitions. Second operand 54 states. [2018-12-03 15:08:14,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:14,816 INFO L93 Difference]: Finished difference Result 140 states and 194 transitions. [2018-12-03 15:08:14,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-12-03 15:08:14,816 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 128 [2018-12-03 15:08:14,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:14,817 INFO L225 Difference]: With dead ends: 140 [2018-12-03 15:08:14,817 INFO L226 Difference]: Without dead ends: 138 [2018-12-03 15:08:14,818 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2835, Invalid=3485, Unknown=0, NotChecked=0, Total=6320 [2018-12-03 15:08:14,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-12-03 15:08:14,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2018-12-03 15:08:14,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-12-03 15:08:14,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 186 transitions. [2018-12-03 15:08:14,824 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 186 transitions. Word has length 128 [2018-12-03 15:08:14,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:14,824 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 186 transitions. [2018-12-03 15:08:14,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-12-03 15:08:14,824 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 186 transitions. [2018-12-03 15:08:14,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-12-03 15:08:14,825 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:14,825 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1] [2018-12-03 15:08:14,825 INFO L423 AbstractCegarLoop]: === Iteration 28 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:14,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:14,825 INFO L82 PathProgramCache]: Analyzing trace with hash -77052608, now seen corresponding path program 26 times [2018-12-03 15:08:14,825 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:14,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:14,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:14,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:14,826 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:14,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:15,322 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 15:08:15,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:15,322 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:15,323 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:15,323 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:15,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:15,323 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 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 15:08:15,333 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:08:15,333 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:08:15,400 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-12-03 15:08:15,400 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:08:15,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:16,811 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 15:08:16,811 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:17,925 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 15:08:17,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:17,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 82 [2018-12-03 15:08:17,944 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:17,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-12-03 15:08:17,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-12-03 15:08:17,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3052, Invalid=3754, Unknown=0, NotChecked=0, Total=6806 [2018-12-03 15:08:17,945 INFO L87 Difference]: Start difference. First operand 134 states and 186 transitions. Second operand 56 states. [2018-12-03 15:08:18,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:18,184 INFO L93 Difference]: Finished difference Result 145 states and 201 transitions. [2018-12-03 15:08:18,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-03 15:08:18,184 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 133 [2018-12-03 15:08:18,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:18,185 INFO L225 Difference]: With dead ends: 145 [2018-12-03 15:08:18,185 INFO L226 Difference]: Without dead ends: 143 [2018-12-03 15:08:18,186 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2862 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3052, Invalid=3754, Unknown=0, NotChecked=0, Total=6806 [2018-12-03 15:08:18,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-12-03 15:08:18,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-12-03 15:08:18,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-12-03 15:08:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 193 transitions. [2018-12-03 15:08:18,192 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 193 transitions. Word has length 133 [2018-12-03 15:08:18,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:18,192 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 193 transitions. [2018-12-03 15:08:18,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-12-03 15:08:18,192 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 193 transitions. [2018-12-03 15:08:18,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-12-03 15:08:18,193 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:18,193 INFO L402 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1] [2018-12-03 15:08:18,193 INFO L423 AbstractCegarLoop]: === Iteration 29 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:18,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:18,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1019034353, now seen corresponding path program 27 times [2018-12-03 15:08:18,194 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:18,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:18,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:08:18,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:18,195 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:18,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:18,898 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 15:08:18,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:18,898 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:18,898 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:18,898 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:18,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:18,899 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:08:18,909 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:08:18,909 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:08:18,945 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:08:18,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:08:18,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:19,724 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 15:08:19,724 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:21,098 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 15:08:21,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:21,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 85 [2018-12-03 15:08:21,117 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:21,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-12-03 15:08:21,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-12-03 15:08:21,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3277, Invalid=4033, Unknown=0, NotChecked=0, Total=7310 [2018-12-03 15:08:21,119 INFO L87 Difference]: Start difference. First operand 139 states and 193 transitions. Second operand 58 states. [2018-12-03 15:08:21,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:21,351 INFO L93 Difference]: Finished difference Result 150 states and 208 transitions. [2018-12-03 15:08:21,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-12-03 15:08:21,351 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 138 [2018-12-03 15:08:21,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:21,352 INFO L225 Difference]: With dead ends: 150 [2018-12-03 15:08:21,352 INFO L226 Difference]: Without dead ends: 148 [2018-12-03 15:08:21,353 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3277, Invalid=4033, Unknown=0, NotChecked=0, Total=7310 [2018-12-03 15:08:21,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-12-03 15:08:21,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2018-12-03 15:08:21,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-12-03 15:08:21,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 200 transitions. [2018-12-03 15:08:21,359 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 200 transitions. Word has length 138 [2018-12-03 15:08:21,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:21,360 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 200 transitions. [2018-12-03 15:08:21,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-12-03 15:08:21,360 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 200 transitions. [2018-12-03 15:08:21,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-12-03 15:08:21,361 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:21,361 INFO L402 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1] [2018-12-03 15:08:21,361 INFO L423 AbstractCegarLoop]: === Iteration 30 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:21,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:21,362 INFO L82 PathProgramCache]: Analyzing trace with hash -247256096, now seen corresponding path program 28 times [2018-12-03 15:08:21,362 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:21,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:21,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:08:21,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:21,363 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:21,906 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 15:08:21,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:21,906 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:21,906 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:21,907 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:21,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:21,907 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:08:21,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:21,917 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:08:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:21,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:22,763 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 15:08:22,763 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:23,871 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 15:08:23,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:23,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 88 [2018-12-03 15:08:23,890 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:23,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-12-03 15:08:23,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-12-03 15:08:23,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3510, Invalid=4322, Unknown=0, NotChecked=0, Total=7832 [2018-12-03 15:08:23,891 INFO L87 Difference]: Start difference. First operand 144 states and 200 transitions. Second operand 60 states. [2018-12-03 15:08:24,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:24,095 INFO L93 Difference]: Finished difference Result 155 states and 215 transitions. [2018-12-03 15:08:24,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-03 15:08:24,096 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 143 [2018-12-03 15:08:24,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:24,097 INFO L225 Difference]: With dead ends: 155 [2018-12-03 15:08:24,097 INFO L226 Difference]: Without dead ends: 153 [2018-12-03 15:08:24,098 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3306 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3510, Invalid=4322, Unknown=0, NotChecked=0, Total=7832 [2018-12-03 15:08:24,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-12-03 15:08:24,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2018-12-03 15:08:24,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-12-03 15:08:24,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 207 transitions. [2018-12-03 15:08:24,104 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 207 transitions. Word has length 143 [2018-12-03 15:08:24,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:24,105 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 207 transitions. [2018-12-03 15:08:24,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-12-03 15:08:24,105 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 207 transitions. [2018-12-03 15:08:24,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-12-03 15:08:24,106 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:24,106 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1] [2018-12-03 15:08:24,106 INFO L423 AbstractCegarLoop]: === Iteration 31 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:24,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:24,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1791588433, now seen corresponding path program 29 times [2018-12-03 15:08:24,107 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:24,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:24,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:24,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:24,108 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:25,102 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 15:08:25,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:25,103 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:25,103 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:25,103 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:25,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:25,103 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:08:25,113 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:08:25,113 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:08:25,175 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-12-03 15:08:25,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:08:25,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:26,170 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 15:08:26,170 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:27,299 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 15:08:27,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:27,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 91 [2018-12-03 15:08:27,319 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:27,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-12-03 15:08:27,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-12-03 15:08:27,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3751, Invalid=4621, Unknown=0, NotChecked=0, Total=8372 [2018-12-03 15:08:27,321 INFO L87 Difference]: Start difference. First operand 149 states and 207 transitions. Second operand 62 states. [2018-12-03 15:08:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:27,591 INFO L93 Difference]: Finished difference Result 160 states and 222 transitions. [2018-12-03 15:08:27,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-12-03 15:08:27,591 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 148 [2018-12-03 15:08:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:27,593 INFO L225 Difference]: With dead ends: 160 [2018-12-03 15:08:27,593 INFO L226 Difference]: Without dead ends: 158 [2018-12-03 15:08:27,594 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3540 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3751, Invalid=4621, Unknown=0, NotChecked=0, Total=8372 [2018-12-03 15:08:27,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-12-03 15:08:27,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2018-12-03 15:08:27,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-12-03 15:08:27,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 214 transitions. [2018-12-03 15:08:27,600 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 214 transitions. Word has length 148 [2018-12-03 15:08:27,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:27,600 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 214 transitions. [2018-12-03 15:08:27,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-12-03 15:08:27,600 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 214 transitions. [2018-12-03 15:08:27,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-12-03 15:08:27,601 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:27,601 INFO L402 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1] [2018-12-03 15:08:27,602 INFO L423 AbstractCegarLoop]: === Iteration 32 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:27,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:27,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1713785472, now seen corresponding path program 30 times [2018-12-03 15:08:27,602 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:27,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:27,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:08:27,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:27,603 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:28,179 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 15:08:28,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:28,179 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:28,179 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:28,180 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:28,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:28,180 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:08:28,188 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:08:28,188 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:08:28,225 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:08:28,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:08:28,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:29,171 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 15:08:29,172 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:30,349 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 15:08:30,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:30,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 94 [2018-12-03 15:08:30,368 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:30,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-12-03 15:08:30,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-12-03 15:08:30,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4000, Invalid=4930, Unknown=0, NotChecked=0, Total=8930 [2018-12-03 15:08:30,371 INFO L87 Difference]: Start difference. First operand 154 states and 214 transitions. Second operand 64 states. [2018-12-03 15:08:30,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:30,936 INFO L93 Difference]: Finished difference Result 165 states and 229 transitions. [2018-12-03 15:08:30,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-03 15:08:30,936 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 153 [2018-12-03 15:08:30,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:30,937 INFO L225 Difference]: With dead ends: 165 [2018-12-03 15:08:30,937 INFO L226 Difference]: Without dead ends: 163 [2018-12-03 15:08:30,939 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4000, Invalid=4930, Unknown=0, NotChecked=0, Total=8930 [2018-12-03 15:08:30,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-12-03 15:08:30,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-12-03 15:08:30,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-12-03 15:08:30,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 221 transitions. [2018-12-03 15:08:30,946 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 221 transitions. Word has length 153 [2018-12-03 15:08:30,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:30,946 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 221 transitions. [2018-12-03 15:08:30,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-12-03 15:08:30,947 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 221 transitions. [2018-12-03 15:08:30,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-12-03 15:08:30,948 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:30,948 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1] [2018-12-03 15:08:30,948 INFO L423 AbstractCegarLoop]: === Iteration 33 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:30,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:30,948 INFO L82 PathProgramCache]: Analyzing trace with hash -835682895, now seen corresponding path program 31 times [2018-12-03 15:08:30,949 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:30,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:30,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:08:30,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:30,950 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:31,900 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 15:08:31,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:31,900 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:31,900 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:31,900 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:31,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:31,900 INFO 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 15:08:31,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:31,911 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:08:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:31,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:32,989 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 15:08:32,990 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:34,264 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 15:08:34,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:34,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 97 [2018-12-03 15:08:34,284 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:34,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-12-03 15:08:34,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-12-03 15:08:34,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4257, Invalid=5249, Unknown=0, NotChecked=0, Total=9506 [2018-12-03 15:08:34,287 INFO L87 Difference]: Start difference. First operand 159 states and 221 transitions. Second operand 66 states. [2018-12-03 15:08:35,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:35,159 INFO L93 Difference]: Finished difference Result 170 states and 236 transitions. [2018-12-03 15:08:35,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-12-03 15:08:35,159 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 158 [2018-12-03 15:08:35,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:35,160 INFO L225 Difference]: With dead ends: 170 [2018-12-03 15:08:35,161 INFO L226 Difference]: Without dead ends: 168 [2018-12-03 15:08:35,162 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4032 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4257, Invalid=5249, Unknown=0, NotChecked=0, Total=9506 [2018-12-03 15:08:35,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-12-03 15:08:35,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2018-12-03 15:08:35,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-12-03 15:08:35,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 228 transitions. [2018-12-03 15:08:35,168 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 228 transitions. Word has length 158 [2018-12-03 15:08:35,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:35,169 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 228 transitions. [2018-12-03 15:08:35,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-12-03 15:08:35,169 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 228 transitions. [2018-12-03 15:08:35,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-12-03 15:08:35,170 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:35,170 INFO L402 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1] [2018-12-03 15:08:35,170 INFO L423 AbstractCegarLoop]: === Iteration 34 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:35,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:35,170 INFO L82 PathProgramCache]: Analyzing trace with hash 925606176, now seen corresponding path program 32 times [2018-12-03 15:08:35,171 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:35,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:35,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:35,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:35,171 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:36,700 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 15:08:36,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:36,701 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:36,701 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:36,701 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:36,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:36,701 INFO 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 15:08:36,709 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:08:36,709 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:08:36,821 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-12-03 15:08:36,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:08:36,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:37,763 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 15:08:37,764 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:39,104 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 15:08:39,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:39,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 100 [2018-12-03 15:08:39,124 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:39,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-12-03 15:08:39,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-12-03 15:08:39,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4522, Invalid=5578, Unknown=0, NotChecked=0, Total=10100 [2018-12-03 15:08:39,126 INFO L87 Difference]: Start difference. First operand 164 states and 228 transitions. Second operand 68 states. [2018-12-03 15:08:39,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:39,434 INFO L93 Difference]: Finished difference Result 175 states and 243 transitions. [2018-12-03 15:08:39,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-12-03 15:08:39,441 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 163 [2018-12-03 15:08:39,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:39,443 INFO L225 Difference]: With dead ends: 175 [2018-12-03 15:08:39,443 INFO L226 Difference]: Without dead ends: 173 [2018-12-03 15:08:39,444 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4290 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4522, Invalid=5578, Unknown=0, NotChecked=0, Total=10100 [2018-12-03 15:08:39,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-12-03 15:08:39,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2018-12-03 15:08:39,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-12-03 15:08:39,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 235 transitions. [2018-12-03 15:08:39,452 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 235 transitions. Word has length 163 [2018-12-03 15:08:39,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:39,453 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 235 transitions. [2018-12-03 15:08:39,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-12-03 15:08:39,453 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 235 transitions. [2018-12-03 15:08:39,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-12-03 15:08:39,454 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:39,454 INFO L402 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1] [2018-12-03 15:08:39,454 INFO L423 AbstractCegarLoop]: === Iteration 35 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:39,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:39,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1441248495, now seen corresponding path program 33 times [2018-12-03 15:08:39,455 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:39,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:39,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:08:39,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:39,456 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:39,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:40,236 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 15:08:40,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:40,236 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:40,236 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:40,236 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:40,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:40,237 INFO 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 15:08:40,246 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:08:40,246 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:08:40,308 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:08:40,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:08:40,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:41,743 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 15:08:41,744 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:43,256 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 15:08:43,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:43,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 103 [2018-12-03 15:08:43,286 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:43,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-12-03 15:08:43,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-12-03 15:08:43,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4795, Invalid=5917, Unknown=0, NotChecked=0, Total=10712 [2018-12-03 15:08:43,288 INFO L87 Difference]: Start difference. First operand 169 states and 235 transitions. Second operand 70 states. [2018-12-03 15:08:43,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:43,777 INFO L93 Difference]: Finished difference Result 180 states and 250 transitions. [2018-12-03 15:08:43,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-12-03 15:08:43,777 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 168 [2018-12-03 15:08:43,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:43,778 INFO L225 Difference]: With dead ends: 180 [2018-12-03 15:08:43,779 INFO L226 Difference]: Without dead ends: 178 [2018-12-03 15:08:43,780 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4556 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4795, Invalid=5917, Unknown=0, NotChecked=0, Total=10712 [2018-12-03 15:08:43,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-12-03 15:08:43,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2018-12-03 15:08:43,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-12-03 15:08:43,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 242 transitions. [2018-12-03 15:08:43,786 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 242 transitions. Word has length 168 [2018-12-03 15:08:43,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:43,787 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 242 transitions. [2018-12-03 15:08:43,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-12-03 15:08:43,787 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 242 transitions. [2018-12-03 15:08:43,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-12-03 15:08:43,788 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:43,788 INFO L402 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1] [2018-12-03 15:08:43,788 INFO L423 AbstractCegarLoop]: === Iteration 36 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:43,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:43,789 INFO L82 PathProgramCache]: Analyzing trace with hash 686632896, now seen corresponding path program 34 times [2018-12-03 15:08:43,789 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:43,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:43,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:08:43,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:43,790 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:43,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:45,071 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 15:08:45,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:45,072 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:45,072 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:45,072 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:45,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:45,072 INFO 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 15:08:45,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:45,082 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:08:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:45,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:46,169 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 15:08:46,169 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:47,913 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 15:08:47,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:47,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 106 [2018-12-03 15:08:47,941 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:47,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-12-03 15:08:47,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-12-03 15:08:47,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5076, Invalid=6266, Unknown=0, NotChecked=0, Total=11342 [2018-12-03 15:08:47,944 INFO L87 Difference]: Start difference. First operand 174 states and 242 transitions. Second operand 72 states. [2018-12-03 15:08:48,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:48,402 INFO L93 Difference]: Finished difference Result 185 states and 257 transitions. [2018-12-03 15:08:48,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-12-03 15:08:48,403 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 173 [2018-12-03 15:08:48,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:48,404 INFO L225 Difference]: With dead ends: 185 [2018-12-03 15:08:48,404 INFO L226 Difference]: Without dead ends: 183 [2018-12-03 15:08:48,405 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4830 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5076, Invalid=6266, Unknown=0, NotChecked=0, Total=11342 [2018-12-03 15:08:48,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-12-03 15:08:48,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-12-03 15:08:48,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-12-03 15:08:48,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 249 transitions. [2018-12-03 15:08:48,412 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 249 transitions. Word has length 173 [2018-12-03 15:08:48,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:48,412 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 249 transitions. [2018-12-03 15:08:48,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-12-03 15:08:48,412 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 249 transitions. [2018-12-03 15:08:48,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-12-03 15:08:48,413 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:48,413 INFO L402 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1] [2018-12-03 15:08:48,414 INFO L423 AbstractCegarLoop]: === Iteration 37 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:48,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:48,414 INFO L82 PathProgramCache]: Analyzing trace with hash 170319985, now seen corresponding path program 35 times [2018-12-03 15:08:48,414 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:48,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:48,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:48,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:48,415 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:50,662 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 15:08:50,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:50,662 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:50,662 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:50,662 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:50,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:50,663 INFO 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 15:08:50,670 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:08:50,670 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:08:50,781 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-12-03 15:08:50,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:08:50,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:52,963 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 15:08:52,964 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:54,563 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 15:08:54,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:54,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 109 [2018-12-03 15:08:54,583 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:54,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-12-03 15:08:54,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-12-03 15:08:54,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5365, Invalid=6625, Unknown=0, NotChecked=0, Total=11990 [2018-12-03 15:08:54,585 INFO L87 Difference]: Start difference. First operand 179 states and 249 transitions. Second operand 74 states. [2018-12-03 15:08:54,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:54,935 INFO L93 Difference]: Finished difference Result 190 states and 264 transitions. [2018-12-03 15:08:54,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-12-03 15:08:54,935 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 178 [2018-12-03 15:08:54,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:54,936 INFO L225 Difference]: With dead ends: 190 [2018-12-03 15:08:54,936 INFO L226 Difference]: Without dead ends: 188 [2018-12-03 15:08:54,937 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5112 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5365, Invalid=6625, Unknown=0, NotChecked=0, Total=11990 [2018-12-03 15:08:54,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-12-03 15:08:54,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2018-12-03 15:08:54,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-12-03 15:08:54,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 256 transitions. [2018-12-03 15:08:54,944 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 256 transitions. Word has length 178 [2018-12-03 15:08:54,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:54,944 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 256 transitions. [2018-12-03 15:08:54,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-12-03 15:08:54,944 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 256 transitions. [2018-12-03 15:08:54,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-12-03 15:08:54,945 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:54,945 INFO L402 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1] [2018-12-03 15:08:54,946 INFO L423 AbstractCegarLoop]: === Iteration 38 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:54,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:54,946 INFO L82 PathProgramCache]: Analyzing trace with hash -2021329312, now seen corresponding path program 36 times [2018-12-03 15:08:54,946 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:54,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:54,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:08:54,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:54,947 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:56,836 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 15:08:56,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:56,837 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:56,837 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:56,837 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:56,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:56,837 INFO 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 15:08:56,846 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:08:56,846 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:08:56,891 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:08:56,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:08:56,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:58,088 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 15:08:58,088 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:59,887 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 15:08:59,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:59,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 112 [2018-12-03 15:08:59,906 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:59,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-12-03 15:08:59,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-12-03 15:08:59,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5662, Invalid=6994, Unknown=0, NotChecked=0, Total=12656 [2018-12-03 15:08:59,908 INFO L87 Difference]: Start difference. First operand 184 states and 256 transitions. Second operand 76 states. [2018-12-03 15:09:00,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:09:00,503 INFO L93 Difference]: Finished difference Result 195 states and 271 transitions. [2018-12-03 15:09:00,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-12-03 15:09:00,504 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 183 [2018-12-03 15:09:00,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:09:00,505 INFO L225 Difference]: With dead ends: 195 [2018-12-03 15:09:00,505 INFO L226 Difference]: Without dead ends: 193 [2018-12-03 15:09:00,506 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5402 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5662, Invalid=6994, Unknown=0, NotChecked=0, Total=12656 [2018-12-03 15:09:00,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-12-03 15:09:00,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2018-12-03 15:09:00,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-12-03 15:09:00,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 263 transitions. [2018-12-03 15:09:00,513 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 263 transitions. Word has length 183 [2018-12-03 15:09:00,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:09:00,514 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 263 transitions. [2018-12-03 15:09:00,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-12-03 15:09:00,514 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 263 transitions. [2018-12-03 15:09:00,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-12-03 15:09:00,515 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:09:00,515 INFO L402 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1] [2018-12-03 15:09:00,515 INFO L423 AbstractCegarLoop]: === Iteration 39 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:09:00,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:09:00,515 INFO L82 PathProgramCache]: Analyzing trace with hash 578960849, now seen corresponding path program 37 times [2018-12-03 15:09:00,516 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:09:00,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:00,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:09:00,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:00,517 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:09:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:09:02,080 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 15:09:02,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:02,080 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:09:02,081 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:09:02,081 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:09:02,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:02,081 INFO 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 15:09:02,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:09:02,090 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:09:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:09:02,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:09:03,355 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 15:09:03,355 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:09:05,196 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 15:09:05,216 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:09:05,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 115 [2018-12-03 15:09:05,216 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:09:05,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-12-03 15:09:05,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-12-03 15:09:05,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5967, Invalid=7373, Unknown=0, NotChecked=0, Total=13340 [2018-12-03 15:09:05,218 INFO L87 Difference]: Start difference. First operand 189 states and 263 transitions. Second operand 78 states. [2018-12-03 15:09:05,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:09:05,636 INFO L93 Difference]: Finished difference Result 200 states and 278 transitions. [2018-12-03 15:09:05,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-12-03 15:09:05,637 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 188 [2018-12-03 15:09:05,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:09:05,638 INFO L225 Difference]: With dead ends: 200 [2018-12-03 15:09:05,638 INFO L226 Difference]: Without dead ends: 198 [2018-12-03 15:09:05,639 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5700 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5967, Invalid=7373, Unknown=0, NotChecked=0, Total=13340 [2018-12-03 15:09:05,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-12-03 15:09:05,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2018-12-03 15:09:05,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-12-03 15:09:05,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 270 transitions. [2018-12-03 15:09:05,646 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 270 transitions. Word has length 188 [2018-12-03 15:09:05,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:09:05,646 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 270 transitions. [2018-12-03 15:09:05,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-12-03 15:09:05,647 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 270 transitions. [2018-12-03 15:09:05,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-12-03 15:09:05,648 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:09:05,648 INFO L402 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1] [2018-12-03 15:09:05,648 INFO L423 AbstractCegarLoop]: === Iteration 40 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:09:05,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:09:05,648 INFO L82 PathProgramCache]: Analyzing trace with hash -963840768, now seen corresponding path program 38 times [2018-12-03 15:09:05,648 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:09:05,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:05,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:09:05,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:05,649 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:09:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:09:06,492 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 15:09:06,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:06,492 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:09:06,492 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:09:06,493 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:09:06,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:06,493 INFO 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 15:09:06,502 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:09:06,502 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:09:06,777 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-12-03 15:09:06,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:09:06,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:09:08,065 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 15:09:08,066 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:09:10,050 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 15:09:10,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:09:10,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 118 [2018-12-03 15:09:10,068 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:09:10,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-12-03 15:09:10,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-12-03 15:09:10,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6280, Invalid=7762, Unknown=0, NotChecked=0, Total=14042 [2018-12-03 15:09:10,070 INFO L87 Difference]: Start difference. First operand 194 states and 270 transitions. Second operand 80 states. [2018-12-03 15:09:10,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:09:10,449 INFO L93 Difference]: Finished difference Result 205 states and 285 transitions. [2018-12-03 15:09:10,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-12-03 15:09:10,449 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 193 [2018-12-03 15:09:10,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:09:10,450 INFO L225 Difference]: With dead ends: 205 [2018-12-03 15:09:10,450 INFO L226 Difference]: Without dead ends: 203 [2018-12-03 15:09:10,451 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 15:09:10,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-12-03 15:09:10,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-12-03 15:09:10,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-12-03 15:09:10,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 277 transitions. [2018-12-03 15:09:10,457 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 277 transitions. Word has length 193 [2018-12-03 15:09:10,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:09:10,457 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 277 transitions. [2018-12-03 15:09:10,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-12-03 15:09:10,458 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 277 transitions. [2018-12-03 15:09:10,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-12-03 15:09:10,459 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:09:10,459 INFO L402 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1] [2018-12-03 15:09:10,459 INFO L423 AbstractCegarLoop]: === Iteration 41 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:09:10,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:09:10,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1345297615, now seen corresponding path program 39 times [2018-12-03 15:09:10,460 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:09:10,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:10,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:09:10,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:10,461 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:09:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:09:11,291 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 15:09:11,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:11,291 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:09:11,291 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:09:11,291 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:09:11,292 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:11,292 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:09:11,300 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:09:11,300 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:09:11,348 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:09:11,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:09:11,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:09:12,960 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 15:09:12,960 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:09:14,969 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 15:09:14,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:09:14,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 121 [2018-12-03 15:09:14,988 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:09:14,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-12-03 15:09:14,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-12-03 15:09:14,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6601, Invalid=8161, Unknown=0, NotChecked=0, Total=14762 [2018-12-03 15:09:14,990 INFO L87 Difference]: Start difference. First operand 199 states and 277 transitions. Second operand 82 states. [2018-12-03 15:09:15,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:09:15,451 INFO L93 Difference]: Finished difference Result 210 states and 292 transitions. [2018-12-03 15:09:15,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-12-03 15:09:15,451 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 198 [2018-12-03 15:09:15,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:09:15,452 INFO L225 Difference]: With dead ends: 210 [2018-12-03 15:09:15,452 INFO L226 Difference]: Without dead ends: 208 [2018-12-03 15:09:15,453 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6320 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6601, Invalid=8161, Unknown=0, NotChecked=0, Total=14762 [2018-12-03 15:09:15,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-12-03 15:09:15,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2018-12-03 15:09:15,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-12-03 15:09:15,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 284 transitions. [2018-12-03 15:09:15,458 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 284 transitions. Word has length 198 [2018-12-03 15:09:15,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:09:15,458 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 284 transitions. [2018-12-03 15:09:15,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-12-03 15:09:15,458 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 284 transitions. [2018-12-03 15:09:15,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-12-03 15:09:15,459 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:09:15,459 INFO L402 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1] [2018-12-03 15:09:15,459 INFO L423 AbstractCegarLoop]: === Iteration 42 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:09:15,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:09:15,459 INFO L82 PathProgramCache]: Analyzing trace with hash 555690912, now seen corresponding path program 40 times [2018-12-03 15:09:15,460 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:09:15,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:15,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:09:15,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:15,460 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:09:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:09:16,374 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 15:09:16,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:16,374 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:09:16,374 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:09:16,375 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:09:16,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:16,375 INFO 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 15:09:16,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:09:16,383 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:09:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:09:16,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:09:17,984 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 15:09:17,984 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:09:20,073 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 15:09:20,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:09:20,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 124 [2018-12-03 15:09:20,091 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:09:20,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-12-03 15:09:20,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-12-03 15:09:20,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6930, Invalid=8570, Unknown=0, NotChecked=0, Total=15500 [2018-12-03 15:09:20,093 INFO L87 Difference]: Start difference. First operand 204 states and 284 transitions. Second operand 84 states. [2018-12-03 15:09:20,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:09:20,602 INFO L93 Difference]: Finished difference Result 215 states and 299 transitions. [2018-12-03 15:09:20,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-12-03 15:09:20,603 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 203 [2018-12-03 15:09:20,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:09:20,604 INFO L225 Difference]: With dead ends: 215 [2018-12-03 15:09:20,604 INFO L226 Difference]: Without dead ends: 213 [2018-12-03 15:09:20,605 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6642 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6930, Invalid=8570, Unknown=0, NotChecked=0, Total=15500 [2018-12-03 15:09:20,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-12-03 15:09:20,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 209. [2018-12-03 15:09:20,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-12-03 15:09:20,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 291 transitions. [2018-12-03 15:09:20,610 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 291 transitions. Word has length 203 [2018-12-03 15:09:20,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:09:20,610 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 291 transitions. [2018-12-03 15:09:20,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-12-03 15:09:20,610 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 291 transitions. [2018-12-03 15:09:20,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-12-03 15:09:20,611 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:09:20,611 INFO L402 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1] [2018-12-03 15:09:20,611 INFO L423 AbstractCegarLoop]: === Iteration 43 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:09:20,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:09:20,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1463242897, now seen corresponding path program 41 times [2018-12-03 15:09:20,612 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:09:20,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:20,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:09:20,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:20,613 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:09:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:09:21,523 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 15:09:21,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:21,524 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:09:21,524 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:09:21,524 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:09:21,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:21,524 INFO 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 15:09:21,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:09:21,532 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:09:21,623 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-12-03 15:09:21,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:09:21,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:09:24,195 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 15:09:24,196 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:09:26,455 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 15:09:26,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:09:26,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 127 [2018-12-03 15:09:26,474 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:09:26,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-12-03 15:09:26,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-12-03 15:09:26,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7267, Invalid=8989, Unknown=0, NotChecked=0, Total=16256 [2018-12-03 15:09:26,476 INFO L87 Difference]: Start difference. First operand 209 states and 291 transitions. Second operand 86 states. [2018-12-03 15:09:26,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:09:26,972 INFO L93 Difference]: Finished difference Result 220 states and 306 transitions. [2018-12-03 15:09:26,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-12-03 15:09:26,972 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 208 [2018-12-03 15:09:26,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:09:26,973 INFO L225 Difference]: With dead ends: 220 [2018-12-03 15:09:26,973 INFO L226 Difference]: Without dead ends: 218 [2018-12-03 15:09:26,974 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6972 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7267, Invalid=8989, Unknown=0, NotChecked=0, Total=16256 [2018-12-03 15:09:26,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-12-03 15:09:26,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 214. [2018-12-03 15:09:26,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-12-03 15:09:26,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 298 transitions. [2018-12-03 15:09:26,981 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 298 transitions. Word has length 208 [2018-12-03 15:09:26,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:09:26,982 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 298 transitions. [2018-12-03 15:09:26,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-12-03 15:09:26,982 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 298 transitions. [2018-12-03 15:09:26,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-12-03 15:09:26,983 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:09:26,983 INFO L402 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1] [2018-12-03 15:09:26,983 INFO L423 AbstractCegarLoop]: === Iteration 44 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:09:26,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:09:26,984 INFO L82 PathProgramCache]: Analyzing trace with hash 970299968, now seen corresponding path program 42 times [2018-12-03 15:09:26,984 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:09:26,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:26,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:09:26,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:26,985 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:09:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:09:28,053 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 15:09:28,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:28,054 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:09:28,054 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:09:28,054 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:09:28,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:28,054 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:09:28,063 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:09:28,063 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:09:28,117 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:09:28,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:09:28,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:09:29,754 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 15:09:29,754 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:09:32,013 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 15:09:32,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:09:32,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 130 [2018-12-03 15:09:32,032 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:09:32,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-12-03 15:09:32,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-12-03 15:09:32,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7612, Invalid=9418, Unknown=0, NotChecked=0, Total=17030 [2018-12-03 15:09:32,035 INFO L87 Difference]: Start difference. First operand 214 states and 298 transitions. Second operand 88 states. [2018-12-03 15:09:32,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:09:32,518 INFO L93 Difference]: Finished difference Result 225 states and 313 transitions. [2018-12-03 15:09:32,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-12-03 15:09:32,518 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 213 [2018-12-03 15:09:32,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:09:32,520 INFO L225 Difference]: With dead ends: 225 [2018-12-03 15:09:32,520 INFO L226 Difference]: Without dead ends: 223 [2018-12-03 15:09:32,521 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7310 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=7612, Invalid=9418, Unknown=0, NotChecked=0, Total=17030 [2018-12-03 15:09:32,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-12-03 15:09:32,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2018-12-03 15:09:32,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-12-03 15:09:32,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 305 transitions. [2018-12-03 15:09:32,527 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 305 transitions. Word has length 213 [2018-12-03 15:09:32,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:09:32,527 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 305 transitions. [2018-12-03 15:09:32,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-12-03 15:09:32,527 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 305 transitions. [2018-12-03 15:09:32,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-12-03 15:09:32,528 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:09:32,528 INFO L402 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1] [2018-12-03 15:09:32,528 INFO L423 AbstractCegarLoop]: === Iteration 45 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:09:32,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:09:32,529 INFO L82 PathProgramCache]: Analyzing trace with hash 106759665, now seen corresponding path program 43 times [2018-12-03 15:09:32,529 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:09:32,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:32,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:09:32,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:32,530 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:09:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:09:34,452 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 15:09:34,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:34,452 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:09:34,452 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:09:34,452 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:09:34,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:34,453 INFO 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 15:09:34,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:09:34,462 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:09:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:09:34,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:09:36,081 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 15:09:36,081 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:09:38,750 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 15:09:38,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:09:38,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 133 [2018-12-03 15:09:38,769 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:09:38,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-12-03 15:09:38,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-12-03 15:09:38,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7965, Invalid=9857, Unknown=0, NotChecked=0, Total=17822 [2018-12-03 15:09:38,772 INFO L87 Difference]: Start difference. First operand 219 states and 305 transitions. Second operand 90 states. [2018-12-03 15:09:39,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:09:39,295 INFO L93 Difference]: Finished difference Result 230 states and 320 transitions. [2018-12-03 15:09:39,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-12-03 15:09:39,296 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 218 [2018-12-03 15:09:39,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:09:39,297 INFO L225 Difference]: With dead ends: 230 [2018-12-03 15:09:39,297 INFO L226 Difference]: Without dead ends: 228 [2018-12-03 15:09:39,298 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7656 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=7965, Invalid=9857, Unknown=0, NotChecked=0, Total=17822 [2018-12-03 15:09:39,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-12-03 15:09:39,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2018-12-03 15:09:39,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-12-03 15:09:39,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 312 transitions. [2018-12-03 15:09:39,305 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 312 transitions. Word has length 218 [2018-12-03 15:09:39,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:09:39,305 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 312 transitions. [2018-12-03 15:09:39,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-12-03 15:09:39,305 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 312 transitions. [2018-12-03 15:09:39,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-12-03 15:09:39,306 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:09:39,307 INFO L402 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1] [2018-12-03 15:09:39,307 INFO L423 AbstractCegarLoop]: === Iteration 46 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:09:39,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:09:39,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1161150240, now seen corresponding path program 44 times [2018-12-03 15:09:39,307 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:09:39,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:39,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:09:39,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:39,308 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:09:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:09:40,312 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 15:09:40,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:40,312 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:09:40,312 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:09:40,312 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:09:40,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:40,312 INFO 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 15:09:40,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:09:40,321 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:09:40,415 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-12-03 15:09:40,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:09:40,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:09:42,012 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 15:09:42,012 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:09:44,755 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 15:09:44,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:09:44,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 136 [2018-12-03 15:09:44,774 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:09:44,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-12-03 15:09:44,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-12-03 15:09:44,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8326, Invalid=10306, Unknown=0, NotChecked=0, Total=18632 [2018-12-03 15:09:44,777 INFO L87 Difference]: Start difference. First operand 224 states and 312 transitions. Second operand 92 states. [2018-12-03 15:09:45,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:09:45,387 INFO L93 Difference]: Finished difference Result 235 states and 327 transitions. [2018-12-03 15:09:45,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-12-03 15:09:45,387 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 223 [2018-12-03 15:09:45,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:09:45,388 INFO L225 Difference]: With dead ends: 235 [2018-12-03 15:09:45,389 INFO L226 Difference]: Without dead ends: 233 [2018-12-03 15:09:45,390 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 15:09:45,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-12-03 15:09:45,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2018-12-03 15:09:45,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-12-03 15:09:45,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 319 transitions. [2018-12-03 15:09:45,397 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 319 transitions. Word has length 223 [2018-12-03 15:09:45,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:09:45,398 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 319 transitions. [2018-12-03 15:09:45,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-12-03 15:09:45,398 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 319 transitions. [2018-12-03 15:09:45,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-12-03 15:09:45,399 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:09:45,399 INFO L402 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1] [2018-12-03 15:09:45,399 INFO L423 AbstractCegarLoop]: === Iteration 47 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:09:45,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:09:45,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1399292753, now seen corresponding path program 45 times [2018-12-03 15:09:45,400 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:09:45,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:45,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:09:45,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:45,401 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:09:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:09:46,439 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 15:09:46,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:46,439 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:09:46,440 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:09:46,440 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:09:46,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:46,440 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:09:46,449 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:09:46,449 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:09:46,506 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:09:46,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:09:46,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:09:48,402 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 15:09:48,402 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:09:51,010 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 15:09:51,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:09:51,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 139 [2018-12-03 15:09:51,029 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:09:51,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-12-03 15:09:51,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-12-03 15:09:51,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8695, Invalid=10765, Unknown=0, NotChecked=0, Total=19460 [2018-12-03 15:09:51,031 INFO L87 Difference]: Start difference. First operand 229 states and 319 transitions. Second operand 94 states. [2018-12-03 15:09:51,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:09:51,694 INFO L93 Difference]: Finished difference Result 240 states and 334 transitions. [2018-12-03 15:09:51,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-12-03 15:09:51,694 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 228 [2018-12-03 15:09:51,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:09:51,695 INFO L225 Difference]: With dead ends: 240 [2018-12-03 15:09:51,695 INFO L226 Difference]: Without dead ends: 238 [2018-12-03 15:09:51,697 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8372 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=8695, Invalid=10765, Unknown=0, NotChecked=0, Total=19460 [2018-12-03 15:09:51,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-12-03 15:09:51,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2018-12-03 15:09:51,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-12-03 15:09:51,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 326 transitions. [2018-12-03 15:09:51,704 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 326 transitions. Word has length 228 [2018-12-03 15:09:51,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:09:51,705 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 326 transitions. [2018-12-03 15:09:51,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-12-03 15:09:51,705 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 326 transitions. [2018-12-03 15:09:51,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-12-03 15:09:51,706 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:09:51,706 INFO L402 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1] [2018-12-03 15:09:51,706 INFO L423 AbstractCegarLoop]: === Iteration 48 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:09:51,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:09:51,707 INFO L82 PathProgramCache]: Analyzing trace with hash -174645376, now seen corresponding path program 46 times [2018-12-03 15:09:51,707 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:09:51,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:51,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:09:51,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:51,708 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:09:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:09:53,423 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 15:09:53,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:53,423 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:09:53,424 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:09:53,424 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:09:53,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:53,424 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 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 15:09:53,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:09:53,433 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:09:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:09:53,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:09:55,405 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 15:09:55,405 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:09:58,447 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 15:09:58,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:09:58,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 142 [2018-12-03 15:09:58,466 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:09:58,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-12-03 15:09:58,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-12-03 15:09:58,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9072, Invalid=11234, Unknown=0, NotChecked=0, Total=20306 [2018-12-03 15:09:58,468 INFO L87 Difference]: Start difference. First operand 234 states and 326 transitions. Second operand 96 states. [2018-12-03 15:09:59,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:09:59,108 INFO L93 Difference]: Finished difference Result 245 states and 341 transitions. [2018-12-03 15:09:59,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-12-03 15:09:59,108 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 233 [2018-12-03 15:09:59,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:09:59,110 INFO L225 Difference]: With dead ends: 245 [2018-12-03 15:09:59,110 INFO L226 Difference]: Without dead ends: 243 [2018-12-03 15:09:59,111 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 15:09:59,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-12-03 15:09:59,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2018-12-03 15:09:59,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-12-03 15:09:59,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 333 transitions. [2018-12-03 15:09:59,118 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 333 transitions. Word has length 233 [2018-12-03 15:09:59,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:09:59,119 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 333 transitions. [2018-12-03 15:09:59,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-12-03 15:09:59,119 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 333 transitions. [2018-12-03 15:09:59,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-12-03 15:09:59,120 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:09:59,120 INFO L402 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1] [2018-12-03 15:09:59,121 INFO L423 AbstractCegarLoop]: === Iteration 49 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:09:59,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:09:59,121 INFO L82 PathProgramCache]: Analyzing trace with hash -587413327, now seen corresponding path program 47 times [2018-12-03 15:09:59,121 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:09:59,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:59,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:09:59,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:59,122 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:09:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:10:00,212 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 15:10:00,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:00,213 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:10:00,213 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:10:00,213 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:10:00,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:00,213 INFO 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 15:10:00,221 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:10:00,221 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:10:00,325 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-12-03 15:10:00,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:10:00,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:10:02,354 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 15:10:02,354 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:10:05,544 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 15:10:05,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:10:05,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 145 [2018-12-03 15:10:05,562 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:10:05,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-12-03 15:10:05,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-12-03 15:10:05,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9457, Invalid=11713, Unknown=0, NotChecked=0, Total=21170 [2018-12-03 15:10:05,565 INFO L87 Difference]: Start difference. First operand 239 states and 333 transitions. Second operand 98 states. [2018-12-03 15:10:06,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:10:06,209 INFO L93 Difference]: Finished difference Result 250 states and 348 transitions. [2018-12-03 15:10:06,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-12-03 15:10:06,210 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 238 [2018-12-03 15:10:06,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:10:06,211 INFO L225 Difference]: With dead ends: 250 [2018-12-03 15:10:06,211 INFO L226 Difference]: Without dead ends: 248 [2018-12-03 15:10:06,212 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9120 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9457, Invalid=11713, Unknown=0, NotChecked=0, Total=21170 [2018-12-03 15:10:06,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-12-03 15:10:06,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2018-12-03 15:10:06,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-12-03 15:10:06,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 340 transitions. [2018-12-03 15:10:06,218 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 340 transitions. Word has length 238 [2018-12-03 15:10:06,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:10:06,218 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 340 transitions. [2018-12-03 15:10:06,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-12-03 15:10:06,218 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 340 transitions. [2018-12-03 15:10:06,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-12-03 15:10:06,219 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:10:06,219 INFO L402 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1] [2018-12-03 15:10:06,220 INFO L423 AbstractCegarLoop]: === Iteration 50 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:10:06,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:10:06,220 INFO L82 PathProgramCache]: Analyzing trace with hash -2091502048, now seen corresponding path program 48 times [2018-12-03 15:10:06,220 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:10:06,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:10:06,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:10:06,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:10:06,221 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:10:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:10:07,467 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 15:10:07,467 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:07,467 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:10:07,467 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:10:07,467 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:10:07,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:07,468 INFO 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 15:10:07,480 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:10:07,480 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:10:07,540 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:10:07,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:10:07,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:10:09,696 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 15:10:09,696 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:10:12,592 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 15:10:12,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:10:12,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 148 [2018-12-03 15:10:12,611 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:10:12,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-12-03 15:10:12,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-12-03 15:10:12,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9850, Invalid=12202, Unknown=0, NotChecked=0, Total=22052 [2018-12-03 15:10:12,614 INFO L87 Difference]: Start difference. First operand 244 states and 340 transitions. Second operand 100 states. [2018-12-03 15:10:13,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:10:13,316 INFO L93 Difference]: Finished difference Result 255 states and 355 transitions. [2018-12-03 15:10:13,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-12-03 15:10:13,316 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 243 [2018-12-03 15:10:13,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:10:13,317 INFO L225 Difference]: With dead ends: 255 [2018-12-03 15:10:13,317 INFO L226 Difference]: Without dead ends: 253 [2018-12-03 15:10:13,318 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9506 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9850, Invalid=12202, Unknown=0, NotChecked=0, Total=22052 [2018-12-03 15:10:13,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-12-03 15:10:13,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2018-12-03 15:10:13,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-12-03 15:10:13,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 347 transitions. [2018-12-03 15:10:13,324 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 347 transitions. Word has length 243 [2018-12-03 15:10:13,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:10:13,324 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 347 transitions. [2018-12-03 15:10:13,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-12-03 15:10:13,324 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 347 transitions. [2018-12-03 15:10:13,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-12-03 15:10:13,325 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:10:13,326 INFO L402 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1] [2018-12-03 15:10:13,326 INFO L423 AbstractCegarLoop]: === Iteration 51 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:10:13,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:10:13,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1438460399, now seen corresponding path program 49 times [2018-12-03 15:10:13,326 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:10:13,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:10:13,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:10:13,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:10:13,327 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:10:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:10:14,502 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 15:10:14,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:14,503 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:10:14,503 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:10:14,503 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:10:14,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:14,503 INFO 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 15:10:14,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:10:14,512 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:10:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:10:14,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:10:16,497 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 15:10:16,497 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:10:19,789 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 15:10:19,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:10:19,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 151 [2018-12-03 15:10:19,808 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:10:19,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-12-03 15:10:19,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-12-03 15:10:19,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10251, Invalid=12701, Unknown=0, NotChecked=0, Total=22952 [2018-12-03 15:10:19,810 INFO L87 Difference]: Start difference. First operand 249 states and 347 transitions. Second operand 102 states. [2018-12-03 15:10:20,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:10:20,872 INFO L93 Difference]: Finished difference Result 260 states and 362 transitions. [2018-12-03 15:10:20,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-12-03 15:10:20,872 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 248 [2018-12-03 15:10:20,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:10:20,874 INFO L225 Difference]: With dead ends: 260 [2018-12-03 15:10:20,874 INFO L226 Difference]: Without dead ends: 258 [2018-12-03 15:10:20,875 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9900 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=10251, Invalid=12701, Unknown=0, NotChecked=0, Total=22952 [2018-12-03 15:10:20,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-12-03 15:10:20,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 254. [2018-12-03 15:10:20,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-12-03 15:10:20,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 354 transitions. [2018-12-03 15:10:20,884 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 354 transitions. Word has length 248 [2018-12-03 15:10:20,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:10:20,884 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 354 transitions. [2018-12-03 15:10:20,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-12-03 15:10:20,884 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 354 transitions. [2018-12-03 15:10:20,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-12-03 15:10:20,891 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:10:20,891 INFO L402 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1] [2018-12-03 15:10:20,891 INFO L423 AbstractCegarLoop]: === Iteration 52 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:10:20,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:10:20,892 INFO L82 PathProgramCache]: Analyzing trace with hash -459176768, now seen corresponding path program 50 times [2018-12-03 15:10:20,892 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:10:20,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:10:20,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:10:20,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:10:20,893 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:10:20,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:10:22,562 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 15:10:22,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:22,562 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:10:22,562 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:10:22,562 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:10:22,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:22,563 INFO 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 15:10:22,573 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:10:22,573 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:10:22,681 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-12-03 15:10:22,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:10:22,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:10:24,937 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 15:10:24,937 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:10:28,060 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 15:10:28,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:10:28,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 154 [2018-12-03 15:10:28,079 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:10:28,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-12-03 15:10:28,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-12-03 15:10:28,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10660, Invalid=13210, Unknown=0, NotChecked=0, Total=23870 [2018-12-03 15:10:28,083 INFO L87 Difference]: Start difference. First operand 254 states and 354 transitions. Second operand 104 states. [2018-12-03 15:10:28,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:10:28,880 INFO L93 Difference]: Finished difference Result 265 states and 369 transitions. [2018-12-03 15:10:28,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-12-03 15:10:28,881 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 253 [2018-12-03 15:10:28,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:10:28,882 INFO L225 Difference]: With dead ends: 265 [2018-12-03 15:10:28,882 INFO L226 Difference]: Without dead ends: 263 [2018-12-03 15:10:28,883 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10302 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=10660, Invalid=13210, Unknown=0, NotChecked=0, Total=23870 [2018-12-03 15:10:28,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-12-03 15:10:28,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 259. [2018-12-03 15:10:28,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-12-03 15:10:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 361 transitions. [2018-12-03 15:10:28,891 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 361 transitions. Word has length 253 [2018-12-03 15:10:28,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:10:28,891 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 361 transitions. [2018-12-03 15:10:28,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-12-03 15:10:28,892 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 361 transitions. [2018-12-03 15:10:28,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-12-03 15:10:28,893 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:10:28,893 INFO L402 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1] [2018-12-03 15:10:28,893 INFO L423 AbstractCegarLoop]: === Iteration 53 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:10:28,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:10:28,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1965053071, now seen corresponding path program 51 times [2018-12-03 15:10:28,894 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:10:28,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:10:28,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:10:28,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:10:28,895 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:10:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:10:30,332 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 15:10:30,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:30,333 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:10:30,333 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:10:30,333 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:10:30,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:30,333 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:10:30,344 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:10:30,344 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:10:30,408 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:10:30,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:10:30,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:10:32,572 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 15:10:32,572 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:10:36,245 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 15:10:36,264 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:10:36,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 157 [2018-12-03 15:10:36,264 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:10:36,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-12-03 15:10:36,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-12-03 15:10:36,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11077, Invalid=13729, Unknown=0, NotChecked=0, Total=24806 [2018-12-03 15:10:36,266 INFO L87 Difference]: Start difference. First operand 259 states and 361 transitions. Second operand 106 states. [2018-12-03 15:10:37,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:10:37,068 INFO L93 Difference]: Finished difference Result 270 states and 376 transitions. [2018-12-03 15:10:37,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-12-03 15:10:37,068 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 258 [2018-12-03 15:10:37,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:10:37,069 INFO L225 Difference]: With dead ends: 270 [2018-12-03 15:10:37,069 INFO L226 Difference]: Without dead ends: 268 [2018-12-03 15:10:37,070 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10712 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=11077, Invalid=13729, Unknown=0, NotChecked=0, Total=24806 [2018-12-03 15:10:37,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-12-03 15:10:37,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2018-12-03 15:10:37,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-12-03 15:10:37,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 368 transitions. [2018-12-03 15:10:37,076 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 368 transitions. Word has length 258 [2018-12-03 15:10:37,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:10:37,077 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 368 transitions. [2018-12-03 15:10:37,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-12-03 15:10:37,077 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 368 transitions. [2018-12-03 15:10:37,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-12-03 15:10:37,078 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:10:37,078 INFO L402 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1] [2018-12-03 15:10:37,079 INFO L423 AbstractCegarLoop]: === Iteration 54 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:10:37,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:10:37,079 INFO L82 PathProgramCache]: Analyzing trace with hash 563284832, now seen corresponding path program 52 times [2018-12-03 15:10:37,079 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:10:37,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:10:37,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:10:37,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:10:37,080 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:10:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:10:38,344 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 15:10:38,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:38,344 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:10:38,344 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:10:38,344 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:10:38,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:38,345 INFO 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 15:10:38,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:10:38,353 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:10:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:10:38,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:10:40,819 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 15:10:40,819 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:10:44,461 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 15:10:44,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:10:44,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 160 [2018-12-03 15:10:44,480 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:10:44,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-12-03 15:10:44,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-12-03 15:10:44,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11502, Invalid=14258, Unknown=0, NotChecked=0, Total=25760 [2018-12-03 15:10:44,482 INFO L87 Difference]: Start difference. First operand 264 states and 368 transitions. Second operand 108 states. [2018-12-03 15:10:45,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:10:45,305 INFO L93 Difference]: Finished difference Result 275 states and 383 transitions. [2018-12-03 15:10:45,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-12-03 15:10:45,305 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 263 [2018-12-03 15:10:45,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:10:45,307 INFO L225 Difference]: With dead ends: 275 [2018-12-03 15:10:45,307 INFO L226 Difference]: Without dead ends: 273 [2018-12-03 15:10:45,307 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11130 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=11502, Invalid=14258, Unknown=0, NotChecked=0, Total=25760 [2018-12-03 15:10:45,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-12-03 15:10:45,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 269. [2018-12-03 15:10:45,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-12-03 15:10:45,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 375 transitions. [2018-12-03 15:10:45,312 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 375 transitions. Word has length 263 [2018-12-03 15:10:45,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:10:45,313 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 375 transitions. [2018-12-03 15:10:45,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-12-03 15:10:45,313 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 375 transitions. [2018-12-03 15:10:45,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-12-03 15:10:45,314 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:10:45,314 INFO L402 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1] [2018-12-03 15:10:45,314 INFO L423 AbstractCegarLoop]: === Iteration 55 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:10:45,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:10:45,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1996048593, now seen corresponding path program 53 times [2018-12-03 15:10:45,314 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:10:45,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:10:45,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:10:45,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:10:45,315 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:10:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:10:46,645 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 15:10:46,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:46,646 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:10:46,646 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:10:46,646 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:10:46,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:46,646 INFO 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 15:10:46,655 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:10:46,655 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:10:46,774 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-12-03 15:10:46,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:10:46,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:10:49,025 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 15:10:49,025 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:10:52,671 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 15:10:52,690 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:10:52,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 163 [2018-12-03 15:10:52,691 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:10:52,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-12-03 15:10:52,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-12-03 15:10:52,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11935, Invalid=14797, Unknown=0, NotChecked=0, Total=26732 [2018-12-03 15:10:52,693 INFO L87 Difference]: Start difference. First operand 269 states and 375 transitions. Second operand 110 states. [2018-12-03 15:10:53,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:10:53,599 INFO L93 Difference]: Finished difference Result 280 states and 390 transitions. [2018-12-03 15:10:53,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-12-03 15:10:53,599 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 268 [2018-12-03 15:10:53,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:10:53,600 INFO L225 Difference]: With dead ends: 280 [2018-12-03 15:10:53,600 INFO L226 Difference]: Without dead ends: 278 [2018-12-03 15:10:53,601 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11556 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=11935, Invalid=14797, Unknown=0, NotChecked=0, Total=26732 [2018-12-03 15:10:53,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-12-03 15:10:53,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 274. [2018-12-03 15:10:53,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-12-03 15:10:53,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 382 transitions. [2018-12-03 15:10:53,608 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 382 transitions. Word has length 268 [2018-12-03 15:10:53,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:10:53,608 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 382 transitions. [2018-12-03 15:10:53,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-12-03 15:10:53,608 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 382 transitions. [2018-12-03 15:10:53,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-12-03 15:10:53,609 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:10:53,609 INFO L402 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1] [2018-12-03 15:10:53,609 INFO L423 AbstractCegarLoop]: === Iteration 56 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:10:53,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:10:53,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1774504448, now seen corresponding path program 54 times [2018-12-03 15:10:53,610 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:10:53,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:10:53,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:10:53,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:10:53,610 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:10:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:10:55,353 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 15:10:55,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:55,354 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:10:55,354 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:10:55,354 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:10:55,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:55,354 INFO 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 15:10:55,362 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:10:55,362 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:10:55,430 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:10:55,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:10:55,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:10:57,782 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 15:10:57,782 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:11:01,746 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 15:11:01,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:11:01,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 166 [2018-12-03 15:11:01,765 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:11:01,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-12-03 15:11:01,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-12-03 15:11:01,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12376, Invalid=15346, Unknown=0, NotChecked=0, Total=27722 [2018-12-03 15:11:01,768 INFO L87 Difference]: Start difference. First operand 274 states and 382 transitions. Second operand 112 states. [2018-12-03 15:11:02,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:11:02,833 INFO L93 Difference]: Finished difference Result 285 states and 397 transitions. [2018-12-03 15:11:02,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-12-03 15:11:02,834 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 273 [2018-12-03 15:11:02,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:11:02,835 INFO L225 Difference]: With dead ends: 285 [2018-12-03 15:11:02,835 INFO L226 Difference]: Without dead ends: 283 [2018-12-03 15:11:02,836 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11990 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=12376, Invalid=15346, Unknown=0, NotChecked=0, Total=27722 [2018-12-03 15:11:02,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-12-03 15:11:02,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 279. [2018-12-03 15:11:02,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-12-03 15:11:02,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 389 transitions. [2018-12-03 15:11:02,844 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 389 transitions. Word has length 273 [2018-12-03 15:11:02,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:11:02,844 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 389 transitions. [2018-12-03 15:11:02,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-12-03 15:11:02,844 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 389 transitions. [2018-12-03 15:11:02,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-12-03 15:11:02,845 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:11:02,846 INFO L402 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1] [2018-12-03 15:11:02,846 INFO L423 AbstractCegarLoop]: === Iteration 57 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:11:02,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:11:02,846 INFO L82 PathProgramCache]: Analyzing trace with hash -281694671, now seen corresponding path program 55 times [2018-12-03 15:11:02,846 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:11:02,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:11:02,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:11:02,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:11:02,847 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:11:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:11:04,302 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 15:11:04,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:11:04,303 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:11:04,303 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:11:04,303 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:11:04,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:11:04,303 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 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 15:11:04,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:11:04,315 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:11:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:11:04,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:11:06,899 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 15:11:06,899 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:11:11,011 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 15:11:11,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:11:11,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 169 [2018-12-03 15:11:11,030 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:11:11,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-12-03 15:11:11,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-12-03 15:11:11,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12825, Invalid=15905, Unknown=0, NotChecked=0, Total=28730 [2018-12-03 15:11:11,033 INFO L87 Difference]: Start difference. First operand 279 states and 389 transitions. Second operand 114 states. [2018-12-03 15:11:11,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:11:11,967 INFO L93 Difference]: Finished difference Result 290 states and 404 transitions. [2018-12-03 15:11:11,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-12-03 15:11:11,967 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 278 [2018-12-03 15:11:11,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:11:11,968 INFO L225 Difference]: With dead ends: 290 [2018-12-03 15:11:11,968 INFO L226 Difference]: Without dead ends: 288 [2018-12-03 15:11:11,969 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 15:11:11,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-12-03 15:11:11,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 284. [2018-12-03 15:11:11,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-12-03 15:11:11,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 396 transitions. [2018-12-03 15:11:11,975 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 396 transitions. Word has length 278 [2018-12-03 15:11:11,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:11:11,975 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 396 transitions. [2018-12-03 15:11:11,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-12-03 15:11:11,976 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 396 transitions. [2018-12-03 15:11:11,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-12-03 15:11:11,977 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:11:11,977 INFO L402 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1] [2018-12-03 15:11:11,977 INFO L423 AbstractCegarLoop]: === Iteration 58 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:11:11,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:11:11,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1269776224, now seen corresponding path program 56 times [2018-12-03 15:11:11,977 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:11:11,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:11:11,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:11:11,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:11:11,978 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:11:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:11:13,664 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 15:11:13,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:11:13,665 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:11:13,665 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:11:13,665 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:11:13,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:11:13,665 INFO 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 15:11:13,675 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:11:13,675 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:11:13,822 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-12-03 15:11:13,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:11:13,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:11:16,486 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 15:11:16,486 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:11:20,630 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 15:11:20,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:11:20,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 170 [2018-12-03 15:11:20,649 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:11:20,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-12-03 15:11:20,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-12-03 15:11:20,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12939, Invalid=16131, Unknown=0, NotChecked=0, Total=29070 [2018-12-03 15:11:20,651 INFO L87 Difference]: Start difference. First operand 284 states and 396 transitions. Second operand 116 states. [2018-12-03 15:11:21,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:11:21,659 INFO L93 Difference]: Finished difference Result 295 states and 411 transitions. [2018-12-03 15:11:21,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-12-03 15:11:21,659 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 283 [2018-12-03 15:11:21,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:11:21,660 INFO L225 Difference]: With dead ends: 295 [2018-12-03 15:11:21,660 INFO L226 Difference]: Without dead ends: 293 [2018-12-03 15:11:21,661 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 15:11:21,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-12-03 15:11:21,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 289. [2018-12-03 15:11:21,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-12-03 15:11:21,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 403 transitions. [2018-12-03 15:11:21,667 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 403 transitions. Word has length 283 [2018-12-03 15:11:21,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:11:21,667 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 403 transitions. [2018-12-03 15:11:21,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-12-03 15:11:21,667 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 403 transitions. [2018-12-03 15:11:21,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-12-03 15:11:21,668 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:11:21,668 INFO L402 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1] [2018-12-03 15:11:21,668 INFO L423 AbstractCegarLoop]: === Iteration 59 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:11:21,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:11:21,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1555749777, now seen corresponding path program 57 times [2018-12-03 15:11:21,669 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:11:21,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:11:21,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:11:21,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:11:21,670 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:11:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:11:23,904 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 15:11:23,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:11:23,904 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:11:23,904 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:11:23,904 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:11:23,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:11:23,905 INFO 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 15:11:23,912 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:11:23,913 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:11:23,980 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:11:23,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:11:23,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:11:26,948 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 15:11:26,949 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:11:31,135 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 15:11:31,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:11:31,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 171 [2018-12-03 15:11:31,154 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:11:31,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-12-03 15:11:31,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-12-03 15:11:31,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13053, Invalid=16359, Unknown=0, NotChecked=0, Total=29412 [2018-12-03 15:11:31,157 INFO L87 Difference]: Start difference. First operand 289 states and 403 transitions. Second operand 118 states. [2018-12-03 15:11:32,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:11:32,248 INFO L93 Difference]: Finished difference Result 300 states and 418 transitions. [2018-12-03 15:11:32,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-12-03 15:11:32,248 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 288 [2018-12-03 15:11:32,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:11:32,249 INFO L225 Difference]: With dead ends: 300 [2018-12-03 15:11:32,250 INFO L226 Difference]: Without dead ends: 298 [2018-12-03 15:11:32,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 459 SyntacticMatches, 4 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13546 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=13053, Invalid=16359, Unknown=0, NotChecked=0, Total=29412 [2018-12-03 15:11:32,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-12-03 15:11:32,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2018-12-03 15:11:32,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-12-03 15:11:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 410 transitions. [2018-12-03 15:11:32,259 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 410 transitions. Word has length 288 [2018-12-03 15:11:32,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:11:32,259 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 410 transitions. [2018-12-03 15:11:32,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-12-03 15:11:32,259 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 410 transitions. [2018-12-03 15:11:32,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-12-03 15:11:32,261 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:11:32,261 INFO L402 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1] [2018-12-03 15:11:32,261 INFO L423 AbstractCegarLoop]: === Iteration 60 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:11:32,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:11:32,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1607528256, now seen corresponding path program 58 times [2018-12-03 15:11:32,262 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:11:32,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:11:32,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:11:32,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:11:32,263 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:11:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:11:33,945 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 15:11:33,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:11:33,945 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:11:33,945 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:11:33,945 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:11:33,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:11:33,946 INFO 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 15:11:33,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:11:33,955 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:11:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:11:34,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:11:37,070 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 15:11:37,070 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:11:41,283 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 15:11:41,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:11:41,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 172 [2018-12-03 15:11:41,302 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:11:41,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-12-03 15:11:41,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-12-03 15:11:41,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13167, Invalid=16589, Unknown=0, NotChecked=0, Total=29756 [2018-12-03 15:11:41,304 INFO L87 Difference]: Start difference. First operand 294 states and 410 transitions. Second operand 120 states. [2018-12-03 15:11:42,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:11:42,336 INFO L93 Difference]: Finished difference Result 305 states and 425 transitions. [2018-12-03 15:11:42,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-12-03 15:11:42,336 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 293 [2018-12-03 15:11:42,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:11:42,338 INFO L225 Difference]: With dead ends: 305 [2018-12-03 15:11:42,338 INFO L226 Difference]: Without dead ends: 303 [2018-12-03 15:11:42,339 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 467 SyntacticMatches, 6 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14103 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=13167, Invalid=16589, Unknown=0, NotChecked=0, Total=29756 [2018-12-03 15:11:42,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-12-03 15:11:42,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 299. [2018-12-03 15:11:42,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-12-03 15:11:42,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 417 transitions. [2018-12-03 15:11:42,348 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 417 transitions. Word has length 293 [2018-12-03 15:11:42,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:11:42,348 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 417 transitions. [2018-12-03 15:11:42,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-12-03 15:11:42,349 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 417 transitions. [2018-12-03 15:11:42,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-12-03 15:11:42,350 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:11:42,350 INFO L402 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1] [2018-12-03 15:11:42,350 INFO L423 AbstractCegarLoop]: === Iteration 61 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:11:42,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:11:42,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1898893553, now seen corresponding path program 59 times [2018-12-03 15:11:42,351 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:11:42,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:11:42,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:11:42,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:11:42,352 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:11:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:11:44,055 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 15:11:44,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:11:44,056 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:11:44,056 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:11:44,056 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:11:44,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:11:44,056 INFO 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 15:11:44,065 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:11:44,066 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:11:44,208 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-12-03 15:11:44,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:11:44,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:11:47,135 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 15:11:47,136 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:11:51,419 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 15:11:51,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:11:51,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 173 [2018-12-03 15:11:51,439 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:11:51,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-12-03 15:11:51,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-12-03 15:11:51,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13281, Invalid=16821, Unknown=0, NotChecked=0, Total=30102 [2018-12-03 15:11:51,441 INFO L87 Difference]: Start difference. First operand 299 states and 417 transitions. Second operand 122 states. [2018-12-03 15:11:52,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:11:52,510 INFO L93 Difference]: Finished difference Result 310 states and 432 transitions. [2018-12-03 15:11:52,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-12-03 15:11:52,510 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 298 [2018-12-03 15:11:52,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:11:52,511 INFO L225 Difference]: With dead ends: 310 [2018-12-03 15:11:52,512 INFO L226 Difference]: Without dead ends: 308 [2018-12-03 15:11:52,512 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 15:11:52,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-12-03 15:11:52,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 304. [2018-12-03 15:11:52,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-12-03 15:11:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 424 transitions. [2018-12-03 15:11:52,518 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 424 transitions. Word has length 298 [2018-12-03 15:11:52,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:11:52,519 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 424 transitions. [2018-12-03 15:11:52,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-12-03 15:11:52,519 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 424 transitions. [2018-12-03 15:11:52,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-12-03 15:11:52,520 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:11:52,520 INFO L402 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 1, 1, 1] [2018-12-03 15:11:52,520 INFO L423 AbstractCegarLoop]: === Iteration 62 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:11:52,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:11:52,520 INFO L82 PathProgramCache]: Analyzing trace with hash -765504032, now seen corresponding path program 60 times [2018-12-03 15:11:52,520 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:11:52,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:11:52,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:11:52,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:11:52,521 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:11:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:11:54,232 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 15:11:54,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:11:54,233 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:11:54,233 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:11:54,233 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:11:54,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:11:54,233 INFO 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 15:11:54,242 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:11:54,243 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:11:54,316 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:11:54,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:11:54,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:11:57,396 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 15:11:57,396 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:12:01,654 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 15:12:01,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:12:01,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 174 [2018-12-03 15:12:01,673 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:12:01,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-12-03 15:12:01,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-12-03 15:12:01,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13395, Invalid=17055, Unknown=0, NotChecked=0, Total=30450 [2018-12-03 15:12:01,676 INFO L87 Difference]: Start difference. First operand 304 states and 424 transitions. Second operand 124 states. [2018-12-03 15:12:02,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:12:02,867 INFO L93 Difference]: Finished difference Result 315 states and 439 transitions. [2018-12-03 15:12:02,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-12-03 15:12:02,867 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 303 [2018-12-03 15:12:02,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:12:02,868 INFO L225 Difference]: With dead ends: 315 [2018-12-03 15:12:02,869 INFO L226 Difference]: Without dead ends: 313 [2018-12-03 15:12:02,869 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 483 SyntacticMatches, 10 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15217 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=13395, Invalid=17055, Unknown=0, NotChecked=0, Total=30450 [2018-12-03 15:12:02,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-12-03 15:12:02,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 309. [2018-12-03 15:12:02,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-12-03 15:12:02,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 431 transitions. [2018-12-03 15:12:02,875 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 431 transitions. Word has length 303 [2018-12-03 15:12:02,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:12:02,876 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 431 transitions. [2018-12-03 15:12:02,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-12-03 15:12:02,876 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 431 transitions. [2018-12-03 15:12:02,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-12-03 15:12:02,877 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:12:02,877 INFO L402 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 1, 1, 1] [2018-12-03 15:12:02,877 INFO L423 AbstractCegarLoop]: === Iteration 63 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:12:02,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:12:02,877 INFO L82 PathProgramCache]: Analyzing trace with hash -2034790831, now seen corresponding path program 61 times [2018-12-03 15:12:02,878 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:12:02,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:12:02,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:12:02,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:12:02,878 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:12:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:12:04,647 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 15:12:04,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:12:04,648 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:12:04,648 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:12:04,648 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:12:04,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:12:04,648 INFO 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 15:12:04,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:12:04,657 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:12:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:12:04,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:12:07,779 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 15:12:07,779 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:12:12,074 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 15:12:12,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:12:12,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 175 [2018-12-03 15:12:12,093 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:12:12,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-12-03 15:12:12,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-12-03 15:12:12,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13509, Invalid=17291, Unknown=0, NotChecked=0, Total=30800 [2018-12-03 15:12:12,096 INFO L87 Difference]: Start difference. First operand 309 states and 431 transitions. Second operand 126 states. [2018-12-03 15:12:13,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:12:13,294 INFO L93 Difference]: Finished difference Result 320 states and 446 transitions. [2018-12-03 15:12:13,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-12-03 15:12:13,294 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 308 [2018-12-03 15:12:13,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:12:13,296 INFO L225 Difference]: With dead ends: 320 [2018-12-03 15:12:13,296 INFO L226 Difference]: Without dead ends: 318 [2018-12-03 15:12:13,296 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 491 SyntacticMatches, 12 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15774 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=13509, Invalid=17291, Unknown=0, NotChecked=0, Total=30800 [2018-12-03 15:12:13,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-12-03 15:12:13,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 314. [2018-12-03 15:12:13,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-12-03 15:12:13,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 438 transitions. [2018-12-03 15:12:13,305 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 438 transitions. Word has length 308 [2018-12-03 15:12:13,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:12:13,306 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 438 transitions. [2018-12-03 15:12:13,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-12-03 15:12:13,306 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 438 transitions. [2018-12-03 15:12:13,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-12-03 15:12:13,307 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:12:13,307 INFO L402 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1] [2018-12-03 15:12:13,308 INFO L423 AbstractCegarLoop]: === Iteration 64 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:12:13,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:12:13,308 INFO L82 PathProgramCache]: Analyzing trace with hash 429257856, now seen corresponding path program 62 times [2018-12-03 15:12:13,308 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:12:13,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:12:13,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:12:13,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:12:13,309 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:12:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:12:15,083 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 15:12:15,084 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:12:15,084 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:12:15,084 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:12:15,084 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:12:15,084 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:12:15,084 INFO 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 15:12:15,093 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:12:15,093 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:12:15,239 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-12-03 15:12:15,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:12:15,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:12:18,440 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 15:12:18,441 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:12:22,898 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 15:12:22,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:12:22,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 176 [2018-12-03 15:12:22,919 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:12:22,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-12-03 15:12:22,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-12-03 15:12:22,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13623, Invalid=17529, Unknown=0, NotChecked=0, Total=31152 [2018-12-03 15:12:22,922 INFO L87 Difference]: Start difference. First operand 314 states and 438 transitions. Second operand 128 states. [2018-12-03 15:12:24,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:12:24,107 INFO L93 Difference]: Finished difference Result 325 states and 453 transitions. [2018-12-03 15:12:24,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-12-03 15:12:24,107 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 313 [2018-12-03 15:12:24,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:12:24,109 INFO L225 Difference]: With dead ends: 325 [2018-12-03 15:12:24,109 INFO L226 Difference]: Without dead ends: 323 [2018-12-03 15:12:24,110 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 499 SyntacticMatches, 14 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16331 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=13623, Invalid=17529, Unknown=0, NotChecked=0, Total=31152 [2018-12-03 15:12:24,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-12-03 15:12:24,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 319. [2018-12-03 15:12:24,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-03 15:12:24,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 445 transitions. [2018-12-03 15:12:24,116 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 445 transitions. Word has length 313 [2018-12-03 15:12:24,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:12:24,117 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 445 transitions. [2018-12-03 15:12:24,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-12-03 15:12:24,117 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 445 transitions. [2018-12-03 15:12:24,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-12-03 15:12:24,118 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:12:24,118 INFO L402 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1] [2018-12-03 15:12:24,118 INFO L423 AbstractCegarLoop]: === Iteration 65 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:12:24,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:12:24,119 INFO L82 PathProgramCache]: Analyzing trace with hash -322639, now seen corresponding path program 63 times [2018-12-03 15:12:24,119 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:12:24,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:12:24,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:12:24,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:12:24,120 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:12:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:12:25,926 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 15:12:25,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:12:25,926 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:12:25,927 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:12:25,927 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:12:25,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:12:25,927 INFO 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 15:12:25,957 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:12:25,957 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:12:26,034 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:12:26,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:12:26,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:12:29,322 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 15:12:29,323 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:12:33,658 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 15:12:33,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:12:33,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 177 [2018-12-03 15:12:33,677 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:12:33,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-12-03 15:12:33,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-12-03 15:12:33,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13737, Invalid=17769, Unknown=0, NotChecked=0, Total=31506 [2018-12-03 15:12:33,679 INFO L87 Difference]: Start difference. First operand 319 states and 445 transitions. Second operand 130 states. [2018-12-03 15:12:34,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:12:34,904 INFO L93 Difference]: Finished difference Result 330 states and 460 transitions. [2018-12-03 15:12:34,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-12-03 15:12:34,904 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 318 [2018-12-03 15:12:34,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:12:34,905 INFO L225 Difference]: With dead ends: 330 [2018-12-03 15:12:34,906 INFO L226 Difference]: Without dead ends: 328 [2018-12-03 15:12:34,906 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 507 SyntacticMatches, 16 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16888 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=13737, Invalid=17769, Unknown=0, NotChecked=0, Total=31506 [2018-12-03 15:12:34,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-12-03 15:12:34,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2018-12-03 15:12:34,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2018-12-03 15:12:34,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 452 transitions. [2018-12-03 15:12:34,912 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 452 transitions. Word has length 318 [2018-12-03 15:12:34,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:12:34,913 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 452 transitions. [2018-12-03 15:12:34,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-12-03 15:12:34,913 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 452 transitions. [2018-12-03 15:12:34,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2018-12-03 15:12:34,914 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:12:34,914 INFO L402 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 1, 1, 1] [2018-12-03 15:12:34,914 INFO L423 AbstractCegarLoop]: === Iteration 66 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:12:34,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:12:34,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1970353376, now seen corresponding path program 64 times [2018-12-03 15:12:34,914 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:12:34,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:12:34,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:12:34,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:12:34,915 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:12:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:12:37,079 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 15:12:37,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:12:37,080 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:12:37,080 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:12:37,080 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:12:37,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:12:37,080 INFO 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 15:12:37,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:12:37,088 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:12:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:12:37,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:12:40,319 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 15:12:40,319 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:12:44,854 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 15:12:44,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:12:44,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 178 [2018-12-03 15:12:44,873 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:12:44,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-12-03 15:12:44,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-12-03 15:12:44,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13851, Invalid=18011, Unknown=0, NotChecked=0, Total=31862 [2018-12-03 15:12:44,876 INFO L87 Difference]: Start difference. First operand 324 states and 452 transitions. Second operand 132 states. [2018-12-03 15:12:46,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:12:46,207 INFO L93 Difference]: Finished difference Result 335 states and 467 transitions. [2018-12-03 15:12:46,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-12-03 15:12:46,208 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 323 [2018-12-03 15:12:46,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:12:46,209 INFO L225 Difference]: With dead ends: 335 [2018-12-03 15:12:46,209 INFO L226 Difference]: Without dead ends: 333 [2018-12-03 15:12:46,210 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 515 SyntacticMatches, 18 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17445 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=13851, Invalid=18011, Unknown=0, NotChecked=0, Total=31862 [2018-12-03 15:12:46,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2018-12-03 15:12:46,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 329. [2018-12-03 15:12:46,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-12-03 15:12:46,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 459 transitions. [2018-12-03 15:12:46,217 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 459 transitions. Word has length 323 [2018-12-03 15:12:46,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:12:46,217 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 459 transitions. [2018-12-03 15:12:46,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-12-03 15:12:46,218 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 459 transitions. [2018-12-03 15:12:46,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-12-03 15:12:46,219 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:12:46,219 INFO L402 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 1, 1, 1] [2018-12-03 15:12:46,220 INFO L423 AbstractCegarLoop]: === Iteration 67 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:12:46,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:12:46,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1474338543, now seen corresponding path program 65 times [2018-12-03 15:12:46,220 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:12:46,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:12:46,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:12:46,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:12:46,221 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:12:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:12:48,478 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 15:12:48,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:12:48,479 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:12:48,479 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:12:48,479 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:12:48,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:12:48,479 INFO 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 15:12:48,488 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:12:48,488 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:12:48,660 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-12-03 15:12:48,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:12:48,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:12:51,901 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 15:12:51,901 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:12:56,314 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 15:12:56,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:12:56,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 179 [2018-12-03 15:12:56,334 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:12:56,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-12-03 15:12:56,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-12-03 15:12:56,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13965, Invalid=18255, Unknown=0, NotChecked=0, Total=32220 [2018-12-03 15:12:56,337 INFO L87 Difference]: Start difference. First operand 329 states and 459 transitions. Second operand 134 states. [2018-12-03 15:12:57,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:12:57,599 INFO L93 Difference]: Finished difference Result 340 states and 474 transitions. [2018-12-03 15:12:57,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-12-03 15:12:57,600 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 328 [2018-12-03 15:12:57,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:12:57,601 INFO L225 Difference]: With dead ends: 340 [2018-12-03 15:12:57,601 INFO L226 Difference]: Without dead ends: 338 [2018-12-03 15:12:57,602 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 721 GetRequests, 523 SyntacticMatches, 20 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18002 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=13965, Invalid=18255, Unknown=0, NotChecked=0, Total=32220 [2018-12-03 15:12:57,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-12-03 15:12:57,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 334. [2018-12-03 15:12:57,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2018-12-03 15:12:57,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 466 transitions. [2018-12-03 15:12:57,608 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 466 transitions. Word has length 328 [2018-12-03 15:12:57,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:12:57,608 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 466 transitions. [2018-12-03 15:12:57,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-12-03 15:12:57,609 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 466 transitions. [2018-12-03 15:12:57,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-12-03 15:12:57,610 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:12:57,610 INFO L402 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 1, 1, 1] [2018-12-03 15:12:57,610 INFO L423 AbstractCegarLoop]: === Iteration 68 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:12:57,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:12:57,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1642322368, now seen corresponding path program 66 times [2018-12-03 15:12:57,611 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:12:57,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:12:57,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:12:57,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:12:57,611 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:12:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:12:59,669 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 15:12:59,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:12:59,669 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:12:59,669 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:12:59,669 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:12:59,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:12:59,669 INFO 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 15:12:59,677 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:12:59,677 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:12:59,757 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:12:59,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:12:59,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:13:03,289 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 15:13:03,289 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:13:07,842 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 15:13:07,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:13:07,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 180 [2018-12-03 15:13:07,862 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:13:07,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-12-03 15:13:07,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-12-03 15:13:07,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14079, Invalid=18501, Unknown=0, NotChecked=0, Total=32580 [2018-12-03 15:13:07,865 INFO L87 Difference]: Start difference. First operand 334 states and 466 transitions. Second operand 136 states. [2018-12-03 15:13:09,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:13:09,273 INFO L93 Difference]: Finished difference Result 345 states and 481 transitions. [2018-12-03 15:13:09,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-12-03 15:13:09,273 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 333 [2018-12-03 15:13:09,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:13:09,275 INFO L225 Difference]: With dead ends: 345 [2018-12-03 15:13:09,275 INFO L226 Difference]: Without dead ends: 343 [2018-12-03 15:13:09,276 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 531 SyntacticMatches, 22 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18559 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=14079, Invalid=18501, Unknown=0, NotChecked=0, Total=32580 [2018-12-03 15:13:09,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-12-03 15:13:09,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 339. [2018-12-03 15:13:09,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-12-03 15:13:09,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 473 transitions. [2018-12-03 15:13:09,282 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 473 transitions. Word has length 333 [2018-12-03 15:13:09,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:13:09,283 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 473 transitions. [2018-12-03 15:13:09,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-12-03 15:13:09,283 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 473 transitions. [2018-12-03 15:13:09,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-12-03 15:13:09,284 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:13:09,284 INFO L402 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 1, 1, 1] [2018-12-03 15:13:09,284 INFO L423 AbstractCegarLoop]: === Iteration 69 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:13:09,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:13:09,285 INFO L82 PathProgramCache]: Analyzing trace with hash 315258481, now seen corresponding path program 67 times [2018-12-03 15:13:09,285 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:13:09,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:13:09,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:13:09,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:13:09,286 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:13:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:13:11,371 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 15:13:11,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:13:11,371 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:13:11,371 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:13:11,371 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:13:11,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:13:11,371 INFO 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 15:13:11,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:13:11,380 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:13:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:13:11,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:13:15,141 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 15:13:15,141 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:13:19,783 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 15:13:19,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:13:19,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 181 [2018-12-03 15:13:19,802 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:13:19,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-12-03 15:13:19,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-12-03 15:13:19,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14193, Invalid=18749, Unknown=0, NotChecked=0, Total=32942 [2018-12-03 15:13:19,805 INFO L87 Difference]: Start difference. First operand 339 states and 473 transitions. Second operand 138 states. [2018-12-03 15:13:21,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:13:21,208 INFO L93 Difference]: Finished difference Result 350 states and 488 transitions. [2018-12-03 15:13:21,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-12-03 15:13:21,208 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 338 [2018-12-03 15:13:21,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:13:21,210 INFO L225 Difference]: With dead ends: 350 [2018-12-03 15:13:21,210 INFO L226 Difference]: Without dead ends: 348 [2018-12-03 15:13:21,211 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 15:13:21,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2018-12-03 15:13:21,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2018-12-03 15:13:21,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2018-12-03 15:13:21,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 480 transitions. [2018-12-03 15:13:21,220 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 480 transitions. Word has length 338 [2018-12-03 15:13:21,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:13:21,220 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 480 transitions. [2018-12-03 15:13:21,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-12-03 15:13:21,221 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 480 transitions. [2018-12-03 15:13:21,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2018-12-03 15:13:21,222 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:13:21,223 INFO L402 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 1, 1, 1] [2018-12-03 15:13:21,223 INFO L423 AbstractCegarLoop]: === Iteration 70 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:13:21,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:13:21,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1672421472, now seen corresponding path program 68 times [2018-12-03 15:13:21,223 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:13:21,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:13:21,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:13:21,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:13:21,224 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:13:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:13:23,632 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 15:13:23,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:13:23,633 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:13:23,633 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:13:23,633 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:13:23,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:13:23,633 INFO 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 15:13:23,642 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:13:23,642 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:13:23,812 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-12-03 15:13:23,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:13:23,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:13:27,317 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 15:13:27,318 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:13:31,939 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 15:13:31,958 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:13:31,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 182 [2018-12-03 15:13:31,958 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:13:31,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-12-03 15:13:31,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-12-03 15:13:31,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14307, Invalid=18999, Unknown=0, NotChecked=0, Total=33306 [2018-12-03 15:13:31,961 INFO L87 Difference]: Start difference. First operand 344 states and 480 transitions. Second operand 140 states. [2018-12-03 15:13:33,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:13:33,363 INFO L93 Difference]: Finished difference Result 355 states and 495 transitions. [2018-12-03 15:13:33,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-12-03 15:13:33,363 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 343 [2018-12-03 15:13:33,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:13:33,365 INFO L225 Difference]: With dead ends: 355 [2018-12-03 15:13:33,365 INFO L226 Difference]: Without dead ends: 353 [2018-12-03 15:13:33,366 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 547 SyntacticMatches, 26 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19673 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=14307, Invalid=18999, Unknown=0, NotChecked=0, Total=33306 [2018-12-03 15:13:33,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2018-12-03 15:13:33,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 349. [2018-12-03 15:13:33,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2018-12-03 15:13:33,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 487 transitions. [2018-12-03 15:13:33,372 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 487 transitions. Word has length 343 [2018-12-03 15:13:33,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:13:33,373 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 487 transitions. [2018-12-03 15:13:33,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-12-03 15:13:33,373 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 487 transitions. [2018-12-03 15:13:33,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-12-03 15:13:33,374 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:13:33,374 INFO L402 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 1, 1, 1] [2018-12-03 15:13:33,374 INFO L423 AbstractCegarLoop]: === Iteration 71 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:13:33,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:13:33,375 INFO L82 PathProgramCache]: Analyzing trace with hash -64859183, now seen corresponding path program 69 times [2018-12-03 15:13:33,375 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:13:33,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:13:33,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:13:33,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:13:33,375 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:13:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:13:35,614 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 15:13:35,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:13:35,615 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:13:35,615 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:13:35,615 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:13:35,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:13:35,615 INFO 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 15:13:35,623 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:13:35,623 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:13:35,709 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:13:35,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:13:35,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:13:39,630 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 15:13:39,630 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:13:44,250 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 15:13:44,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:13:44,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 183 [2018-12-03 15:13:44,270 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:13:44,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-12-03 15:13:44,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-12-03 15:13:44,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14421, Invalid=19251, Unknown=0, NotChecked=0, Total=33672 [2018-12-03 15:13:44,272 INFO L87 Difference]: Start difference. First operand 349 states and 487 transitions. Second operand 142 states. [2018-12-03 15:13:45,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:13:45,748 INFO L93 Difference]: Finished difference Result 360 states and 502 transitions. [2018-12-03 15:13:45,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-12-03 15:13:45,748 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 348 [2018-12-03 15:13:45,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:13:45,750 INFO L225 Difference]: With dead ends: 360 [2018-12-03 15:13:45,750 INFO L226 Difference]: Without dead ends: 358 [2018-12-03 15:13:45,750 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 15:13:45,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2018-12-03 15:13:45,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 354. [2018-12-03 15:13:45,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2018-12-03 15:13:45,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 494 transitions. [2018-12-03 15:13:45,757 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 494 transitions. Word has length 348 [2018-12-03 15:13:45,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:13:45,757 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 494 transitions. [2018-12-03 15:13:45,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-12-03 15:13:45,758 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 494 transitions. [2018-12-03 15:13:45,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2018-12-03 15:13:45,759 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:13:45,759 INFO L402 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 1, 1, 1] [2018-12-03 15:13:45,759 INFO L423 AbstractCegarLoop]: === Iteration 72 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:13:45,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:13:45,759 INFO L82 PathProgramCache]: Analyzing trace with hash 2072682240, now seen corresponding path program 70 times [2018-12-03 15:13:45,760 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:13:45,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:13:45,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:13:45,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:13:45,760 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:13:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:13:48,002 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 15:13:48,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:13:48,003 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:13:48,003 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:13:48,003 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:13:48,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:13:48,003 INFO 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 15:13:48,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:13:48,012 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:13:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:13:48,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:13:52,050 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 15:13:52,050 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:13:56,620 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 15:13:56,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:13:56,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 184 [2018-12-03 15:13:56,640 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:13:56,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-12-03 15:13:56,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-12-03 15:13:56,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14535, Invalid=19505, Unknown=0, NotChecked=0, Total=34040 [2018-12-03 15:13:56,642 INFO L87 Difference]: Start difference. First operand 354 states and 494 transitions. Second operand 144 states. [2018-12-03 15:13:58,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:13:58,194 INFO L93 Difference]: Finished difference Result 365 states and 509 transitions. [2018-12-03 15:13:58,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-12-03 15:13:58,195 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 353 [2018-12-03 15:13:58,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:13:58,196 INFO L225 Difference]: With dead ends: 365 [2018-12-03 15:13:58,196 INFO L226 Difference]: Without dead ends: 363 [2018-12-03 15:13:58,197 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 776 GetRequests, 563 SyntacticMatches, 30 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20787 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=14535, Invalid=19505, Unknown=0, NotChecked=0, Total=34040 [2018-12-03 15:13:58,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-12-03 15:13:58,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 359. [2018-12-03 15:13:58,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-12-03 15:13:58,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 501 transitions. [2018-12-03 15:13:58,203 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 501 transitions. Word has length 353 [2018-12-03 15:13:58,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:13:58,204 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 501 transitions. [2018-12-03 15:13:58,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-12-03 15:13:58,204 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 501 transitions. [2018-12-03 15:13:58,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-12-03 15:13:58,205 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:13:58,205 INFO L402 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 1, 1, 1] [2018-12-03 15:13:58,205 INFO L423 AbstractCegarLoop]: === Iteration 73 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:13:58,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:13:58,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1462961871, now seen corresponding path program 71 times [2018-12-03 15:13:58,206 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:13:58,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:13:58,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:13:58,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:13:58,207 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:13:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:14:00,796 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 15:14:00,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:14:00,796 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:14:00,796 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:14:00,797 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:14:00,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:14:00,797 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:14:00,805 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:14:00,805 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:14:00,988 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2018-12-03 15:14:00,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:14:00,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:14:04,995 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 15:14:04,995 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:14:09,695 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 15:14:09,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:14:09,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 185 [2018-12-03 15:14:09,716 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:14:09,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-12-03 15:14:09,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-12-03 15:14:09,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14649, Invalid=19761, Unknown=0, NotChecked=0, Total=34410 [2018-12-03 15:14:09,720 INFO L87 Difference]: Start difference. First operand 359 states and 501 transitions. Second operand 146 states. [2018-12-03 15:14:11,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:14:11,366 INFO L93 Difference]: Finished difference Result 370 states and 516 transitions. [2018-12-03 15:14:11,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-12-03 15:14:11,366 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 358 [2018-12-03 15:14:11,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:14:11,368 INFO L225 Difference]: With dead ends: 370 [2018-12-03 15:14:11,368 INFO L226 Difference]: Without dead ends: 368 [2018-12-03 15:14:11,369 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 571 SyntacticMatches, 32 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21344 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=14649, Invalid=19761, Unknown=0, NotChecked=0, Total=34410 [2018-12-03 15:14:11,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2018-12-03 15:14:11,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 364. [2018-12-03 15:14:11,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-12-03 15:14:11,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 508 transitions. [2018-12-03 15:14:11,376 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 508 transitions. Word has length 358 [2018-12-03 15:14:11,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:14:11,376 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 508 transitions. [2018-12-03 15:14:11,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-12-03 15:14:11,376 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 508 transitions. [2018-12-03 15:14:11,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-12-03 15:14:11,377 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:14:11,378 INFO L402 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 1, 1, 1] [2018-12-03 15:14:11,378 INFO L423 AbstractCegarLoop]: === Iteration 74 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:14:11,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:14:11,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1552962976, now seen corresponding path program 72 times [2018-12-03 15:14:11,378 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:14:11,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:14:11,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:14:11,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:14:11,379 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:14:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:14:14,194 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 15:14:14,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:14:14,194 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:14:14,194 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:14:14,195 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:14:14,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:14:14,195 INFO 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 15:14:14,204 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:14:14,204 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:14:14,295 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:14:14,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:14:14,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:14:18,236 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 15:14:18,236 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:14:22,977 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 15:14:22,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:14:22,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 186 [2018-12-03 15:14:22,996 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:14:22,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-12-03 15:14:22,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-12-03 15:14:22,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14763, Invalid=20019, Unknown=0, NotChecked=0, Total=34782 [2018-12-03 15:14:22,999 INFO L87 Difference]: Start difference. First operand 364 states and 508 transitions. Second operand 148 states. [2018-12-03 15:14:24,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:14:24,597 INFO L93 Difference]: Finished difference Result 375 states and 523 transitions. [2018-12-03 15:14:24,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-12-03 15:14:24,597 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 363 [2018-12-03 15:14:24,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:14:24,599 INFO L225 Difference]: With dead ends: 375 [2018-12-03 15:14:24,599 INFO L226 Difference]: Without dead ends: 373 [2018-12-03 15:14:24,599 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 798 GetRequests, 579 SyntacticMatches, 34 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21901 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=14763, Invalid=20019, Unknown=0, NotChecked=0, Total=34782 [2018-12-03 15:14:24,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2018-12-03 15:14:24,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 369. [2018-12-03 15:14:24,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2018-12-03 15:14:24,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 515 transitions. [2018-12-03 15:14:24,606 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 515 transitions. Word has length 363 [2018-12-03 15:14:24,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:14:24,607 INFO L480 AbstractCegarLoop]: Abstraction has 369 states and 515 transitions. [2018-12-03 15:14:24,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-12-03 15:14:24,607 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 515 transitions. [2018-12-03 15:14:24,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-12-03 15:14:24,608 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:14:24,608 INFO L402 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 1, 1, 1] [2018-12-03 15:14:24,609 INFO L423 AbstractCegarLoop]: === Iteration 75 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:14:24,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:14:24,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1173382801, now seen corresponding path program 73 times [2018-12-03 15:14:24,609 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:14:24,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:14:24,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:14:24,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:14:24,610 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:14:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:14:27,082 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 15:14:27,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:14:27,082 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:14:27,082 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:14:27,082 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:14:27,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:14:27,082 INFO 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 15:14:27,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:14:27,091 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:14:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:14:27,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:14:31,461 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 15:14:31,461 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:14:36,201 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 15:14:36,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:14:36,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 187 [2018-12-03 15:14:36,220 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:14:36,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-12-03 15:14:36,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-12-03 15:14:36,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14877, Invalid=20279, Unknown=0, NotChecked=0, Total=35156 [2018-12-03 15:14:36,223 INFO L87 Difference]: Start difference. First operand 369 states and 515 transitions. Second operand 150 states. [2018-12-03 15:14:37,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:14:37,978 INFO L93 Difference]: Finished difference Result 380 states and 530 transitions. [2018-12-03 15:14:37,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-12-03 15:14:37,979 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 368 [2018-12-03 15:14:37,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:14:37,981 INFO L225 Difference]: With dead ends: 380 [2018-12-03 15:14:37,981 INFO L226 Difference]: Without dead ends: 378 [2018-12-03 15:14:37,982 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 587 SyntacticMatches, 36 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22458 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=14877, Invalid=20279, Unknown=0, NotChecked=0, Total=35156 [2018-12-03 15:14:37,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2018-12-03 15:14:37,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 374. [2018-12-03 15:14:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2018-12-03 15:14:37,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 522 transitions. [2018-12-03 15:14:37,992 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 522 transitions. Word has length 368 [2018-12-03 15:14:37,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:14:37,992 INFO L480 AbstractCegarLoop]: Abstraction has 374 states and 522 transitions. [2018-12-03 15:14:37,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-12-03 15:14:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 522 transitions. [2018-12-03 15:14:37,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-12-03 15:14:37,994 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:14:37,994 INFO L402 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 1, 1, 1] [2018-12-03 15:14:37,995 INFO L423 AbstractCegarLoop]: === Iteration 76 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:14:37,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:14:37,995 INFO L82 PathProgramCache]: Analyzing trace with hash 559563840, now seen corresponding path program 74 times [2018-12-03 15:14:37,995 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:14:37,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:14:37,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:14:37,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:14:37,996 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:14:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:14:40,879 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 15:14:40,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:14:40,880 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:14:40,880 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:14:40,880 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:14:40,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:14:40,880 INFO 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 15:14:40,890 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:14:40,890 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:14:41,074 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2018-12-03 15:14:41,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:14:41,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:14:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13579 backedges. 0 proven. 13579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:14:45,413 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:14:50,338 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 15:14:50,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:14:50,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 188 [2018-12-03 15:14:50,358 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:14:50,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-12-03 15:14:50,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-12-03 15:14:50,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14991, Invalid=20541, Unknown=0, NotChecked=0, Total=35532 [2018-12-03 15:14:50,360 INFO L87 Difference]: Start difference. First operand 374 states and 522 transitions. Second operand 152 states. [2018-12-03 15:14:52,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:14:52,169 INFO L93 Difference]: Finished difference Result 385 states and 537 transitions. [2018-12-03 15:14:52,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-12-03 15:14:52,169 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 373 [2018-12-03 15:14:52,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:14:52,171 INFO L225 Difference]: With dead ends: 385 [2018-12-03 15:14:52,171 INFO L226 Difference]: Without dead ends: 383 [2018-12-03 15:14:52,172 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 820 GetRequests, 595 SyntacticMatches, 38 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23015 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=14991, Invalid=20541, Unknown=0, NotChecked=0, Total=35532 [2018-12-03 15:14:52,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-12-03 15:14:52,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 379. [2018-12-03 15:14:52,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2018-12-03 15:14:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 529 transitions. [2018-12-03 15:14:52,179 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 529 transitions. Word has length 373 [2018-12-03 15:14:52,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:14:52,179 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 529 transitions. [2018-12-03 15:14:52,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-12-03 15:14:52,179 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 529 transitions. [2018-12-03 15:14:52,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2018-12-03 15:14:52,181 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:14:52,181 INFO L402 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 1, 1, 1] [2018-12-03 15:14:52,181 INFO L423 AbstractCegarLoop]: === Iteration 77 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:14:52,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:14:52,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1228053489, now seen corresponding path program 75 times [2018-12-03 15:14:52,181 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:14:52,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:14:52,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:14:52,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:14:52,182 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:14:52,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:14:54,835 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 15:14:54,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:14:54,835 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:14:54,836 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:14:54,836 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:14:54,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:14:54,836 INFO 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 15:14:54,843 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:14:54,844 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:14:54,938 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:14:54,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:14:54,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:14:59,228 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 15:14:59,228 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:15:04,043 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 15:15:04,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:15:04,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 189 [2018-12-03 15:15:04,063 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:15:04,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-12-03 15:15:04,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-12-03 15:15:04,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15105, Invalid=20805, Unknown=0, NotChecked=0, Total=35910 [2018-12-03 15:15:04,066 INFO L87 Difference]: Start difference. First operand 379 states and 529 transitions. Second operand 154 states. [2018-12-03 15:15:05,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:15:05,927 INFO L93 Difference]: Finished difference Result 390 states and 544 transitions. [2018-12-03 15:15:05,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-12-03 15:15:05,928 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 378 [2018-12-03 15:15:05,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:15:05,929 INFO L225 Difference]: With dead ends: 390 [2018-12-03 15:15:05,929 INFO L226 Difference]: Without dead ends: 388 [2018-12-03 15:15:05,930 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 831 GetRequests, 603 SyntacticMatches, 40 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23572 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=15105, Invalid=20805, Unknown=0, NotChecked=0, Total=35910 [2018-12-03 15:15:05,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2018-12-03 15:15:05,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 384. [2018-12-03 15:15:05,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2018-12-03 15:15:05,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 536 transitions. [2018-12-03 15:15:05,938 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 536 transitions. Word has length 378 [2018-12-03 15:15:05,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:15:05,938 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 536 transitions. [2018-12-03 15:15:05,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-12-03 15:15:05,938 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 536 transitions. [2018-12-03 15:15:05,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2018-12-03 15:15:05,939 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:15:05,940 INFO L402 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 1, 1, 1] [2018-12-03 15:15:05,940 INFO L423 AbstractCegarLoop]: === Iteration 78 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:15:05,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:15:05,940 INFO L82 PathProgramCache]: Analyzing trace with hash -335385888, now seen corresponding path program 76 times [2018-12-03 15:15:05,940 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:15:05,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:15:05,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:15:05,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:15:05,941 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:15:05,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:15:08,603 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 15:15:08,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:15:08,603 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:15:08,604 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:15:08,604 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:15:08,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:15:08,604 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:15:08,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:15:08,612 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:15:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:15:08,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:15:13,405 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 15:15:13,406 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:15:18,303 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 15:15:18,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:15:18,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 190 [2018-12-03 15:15:18,322 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:15:18,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-12-03 15:15:18,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-12-03 15:15:18,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15219, Invalid=21071, Unknown=0, NotChecked=0, Total=36290 [2018-12-03 15:15:18,325 INFO L87 Difference]: Start difference. First operand 384 states and 536 transitions. Second operand 156 states. [2018-12-03 15:15:20,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:15:20,177 INFO L93 Difference]: Finished difference Result 395 states and 551 transitions. [2018-12-03 15:15:20,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-12-03 15:15:20,178 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 383 [2018-12-03 15:15:20,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:15:20,179 INFO L225 Difference]: With dead ends: 395 [2018-12-03 15:15:20,179 INFO L226 Difference]: Without dead ends: 393 [2018-12-03 15:15:20,180 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 842 GetRequests, 611 SyntacticMatches, 42 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24129 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=15219, Invalid=21071, Unknown=0, NotChecked=0, Total=36290 [2018-12-03 15:15:20,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-12-03 15:15:20,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 389. [2018-12-03 15:15:20,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2018-12-03 15:15:20,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 543 transitions. [2018-12-03 15:15:20,186 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 543 transitions. Word has length 383 [2018-12-03 15:15:20,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:15:20,187 INFO L480 AbstractCegarLoop]: Abstraction has 389 states and 543 transitions. [2018-12-03 15:15:20,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-12-03 15:15:20,187 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 543 transitions. [2018-12-03 15:15:20,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2018-12-03 15:15:20,188 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:15:20,188 INFO L402 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 1, 1, 1] [2018-12-03 15:15:20,189 INFO L423 AbstractCegarLoop]: === Iteration 79 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:15:20,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:15:20,189 INFO L82 PathProgramCache]: Analyzing trace with hash -793142959, now seen corresponding path program 77 times [2018-12-03 15:15:20,189 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:15:20,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:15:20,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:15:20,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:15:20,190 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:15:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:15:23,126 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 15:15:23,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:15:23,126 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:15:23,126 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:15:23,126 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:15:23,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:15:23,126 INFO 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 15:15:23,134 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:15:23,134 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:15:23,333 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 78 check-sat command(s) [2018-12-03 15:15:23,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:15:23,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:15:28,037 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 15:15:28,037 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:15:32,972 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 15:15:32,991 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:15:32,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 191 [2018-12-03 15:15:32,992 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:15:32,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-12-03 15:15:32,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-12-03 15:15:32,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15333, Invalid=21339, Unknown=0, NotChecked=0, Total=36672 [2018-12-03 15:15:32,995 INFO L87 Difference]: Start difference. First operand 389 states and 543 transitions. Second operand 158 states. [2018-12-03 15:15:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:15:34,989 INFO L93 Difference]: Finished difference Result 400 states and 558 transitions. [2018-12-03 15:15:34,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-12-03 15:15:34,990 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 388 [2018-12-03 15:15:34,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:15:34,991 INFO L225 Difference]: With dead ends: 400 [2018-12-03 15:15:34,992 INFO L226 Difference]: Without dead ends: 398 [2018-12-03 15:15:34,992 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 853 GetRequests, 619 SyntacticMatches, 44 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24686 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=15333, Invalid=21339, Unknown=0, NotChecked=0, Total=36672 [2018-12-03 15:15:34,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-12-03 15:15:34,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 394. [2018-12-03 15:15:34,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2018-12-03 15:15:35,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 550 transitions. [2018-12-03 15:15:35,000 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 550 transitions. Word has length 388 [2018-12-03 15:15:35,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:15:35,000 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 550 transitions. [2018-12-03 15:15:35,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-12-03 15:15:35,000 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 550 transitions. [2018-12-03 15:15:35,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2018-12-03 15:15:35,002 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:15:35,002 INFO L402 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 1, 1, 1] [2018-12-03 15:15:35,002 INFO L423 AbstractCegarLoop]: === Iteration 80 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:15:35,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:15:35,003 INFO L82 PathProgramCache]: Analyzing trace with hash -2044540544, now seen corresponding path program 78 times [2018-12-03 15:15:35,003 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:15:35,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:15:35,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:15:35,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:15:35,003 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:15:35,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:15:38,041 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 15:15:38,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:15:38,041 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:15:38,041 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:15:38,041 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:15:38,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:15:38,041 INFO 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 15:15:38,050 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:15:38,050 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:15:38,148 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:15:38,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:15:38,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:15:42,958 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 15:15:42,959 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:15:47,943 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 15:15:47,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:15:47,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 192 [2018-12-03 15:15:47,962 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:15:47,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-12-03 15:15:47,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-12-03 15:15:47,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15447, Invalid=21609, Unknown=0, NotChecked=0, Total=37056 [2018-12-03 15:15:47,965 INFO L87 Difference]: Start difference. First operand 394 states and 550 transitions. Second operand 160 states. [2018-12-03 15:15:49,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:15:49,948 INFO L93 Difference]: Finished difference Result 405 states and 565 transitions. [2018-12-03 15:15:49,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-12-03 15:15:49,949 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 393 [2018-12-03 15:15:49,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:15:49,950 INFO L225 Difference]: With dead ends: 405 [2018-12-03 15:15:49,950 INFO L226 Difference]: Without dead ends: 403 [2018-12-03 15:15:49,951 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 627 SyntacticMatches, 46 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25243 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=15447, Invalid=21609, Unknown=0, NotChecked=0, Total=37056 [2018-12-03 15:15:49,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2018-12-03 15:15:49,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 399. [2018-12-03 15:15:49,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2018-12-03 15:15:49,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 557 transitions. [2018-12-03 15:15:49,959 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 557 transitions. Word has length 393 [2018-12-03 15:15:49,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:15:49,959 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 557 transitions. [2018-12-03 15:15:49,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-12-03 15:15:49,959 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 557 transitions. [2018-12-03 15:15:49,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2018-12-03 15:15:49,961 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:15:49,961 INFO L402 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 1, 1, 1] [2018-12-03 15:15:49,961 INFO L423 AbstractCegarLoop]: === Iteration 81 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:15:49,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:15:49,961 INFO L82 PathProgramCache]: Analyzing trace with hash 53173937, now seen corresponding path program 79 times [2018-12-03 15:15:49,961 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:15:49,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:15:49,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:15:49,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:15:49,962 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:15:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:15:53,072 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 15:15:53,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:15:53,073 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:15:53,073 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:15:53,073 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:15:53,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:15:53,073 INFO 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 15:15:53,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:15:53,081 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:15:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:15:53,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:15:58,127 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 15:15:58,127 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:16:03,095 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 15:16:03,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:16:03,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 193 [2018-12-03 15:16:03,114 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:16:03,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-12-03 15:16:03,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-12-03 15:16:03,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15561, Invalid=21881, Unknown=0, NotChecked=0, Total=37442 [2018-12-03 15:16:03,118 INFO L87 Difference]: Start difference. First operand 399 states and 557 transitions. Second operand 162 states. [2018-12-03 15:16:05,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:16:05,178 INFO L93 Difference]: Finished difference Result 410 states and 572 transitions. [2018-12-03 15:16:05,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-12-03 15:16:05,178 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 398 [2018-12-03 15:16:05,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:16:05,180 INFO L225 Difference]: With dead ends: 410 [2018-12-03 15:16:05,180 INFO L226 Difference]: Without dead ends: 408 [2018-12-03 15:16:05,181 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 635 SyntacticMatches, 48 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25800 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=15561, Invalid=21881, Unknown=0, NotChecked=0, Total=37442 [2018-12-03 15:16:05,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2018-12-03 15:16:05,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 404. [2018-12-03 15:16:05,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2018-12-03 15:16:05,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 564 transitions. [2018-12-03 15:16:05,188 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 564 transitions. Word has length 398 [2018-12-03 15:16:05,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:16:05,189 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 564 transitions. [2018-12-03 15:16:05,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-12-03 15:16:05,189 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 564 transitions. [2018-12-03 15:16:05,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2018-12-03 15:16:05,190 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:16:05,191 INFO L402 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 1, 1, 1] [2018-12-03 15:16:05,191 INFO L423 AbstractCegarLoop]: === Iteration 82 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:16:05,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:16:05,191 INFO L82 PathProgramCache]: Analyzing trace with hash 13983776, now seen corresponding path program 80 times [2018-12-03 15:16:05,191 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:16:05,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:16:05,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:16:05,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:16:05,192 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:16:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:16:08,385 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 15:16:08,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:16:08,385 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:16:08,385 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:16:08,385 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:16:08,386 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:16:08,386 INFO 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 15:16:08,394 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:16:08,394 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:16:08,599 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2018-12-03 15:16:08,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:16:08,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:16:13,637 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 15:16:13,638 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:16:18,717 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 15:16:18,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:16:18,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 194 [2018-12-03 15:16:18,736 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:16:18,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-12-03 15:16:18,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-12-03 15:16:18,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15675, Invalid=22155, Unknown=0, NotChecked=0, Total=37830 [2018-12-03 15:16:18,740 INFO L87 Difference]: Start difference. First operand 404 states and 564 transitions. Second operand 164 states. [2018-12-03 15:16:20,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:16:20,875 INFO L93 Difference]: Finished difference Result 415 states and 579 transitions. [2018-12-03 15:16:20,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-12-03 15:16:20,875 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 403 [2018-12-03 15:16:20,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:16:20,877 INFO L225 Difference]: With dead ends: 415 [2018-12-03 15:16:20,877 INFO L226 Difference]: Without dead ends: 413 [2018-12-03 15:16:20,878 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 886 GetRequests, 643 SyntacticMatches, 50 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26357 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=15675, Invalid=22155, Unknown=0, NotChecked=0, Total=37830 [2018-12-03 15:16:20,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2018-12-03 15:16:20,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 409. [2018-12-03 15:16:20,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2018-12-03 15:16:20,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 571 transitions. [2018-12-03 15:16:20,886 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 571 transitions. Word has length 403 [2018-12-03 15:16:20,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:16:20,886 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 571 transitions. [2018-12-03 15:16:20,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-12-03 15:16:20,886 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 571 transitions. [2018-12-03 15:16:20,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2018-12-03 15:16:20,888 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:16:20,888 INFO L402 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 81, 1, 1, 1] [2018-12-03 15:16:20,888 INFO L423 AbstractCegarLoop]: === Iteration 83 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:16:20,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:16:20,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1873669137, now seen corresponding path program 81 times [2018-12-03 15:16:20,889 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:16:20,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:16:20,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:16:20,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:16:20,889 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:16:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:16:24,079 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 15:16:24,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:16:24,080 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:16:24,080 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:16:24,080 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:16:24,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:16:24,080 INFO 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 15:16:24,088 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:16:24,088 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:16:24,190 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:16:24,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:16:24,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:16:29,414 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 15:16:29,414 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:16:34,486 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 15:16:34,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:16:34,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 195 [2018-12-03 15:16:34,505 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:16:34,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-12-03 15:16:34,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-12-03 15:16:34,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15789, Invalid=22431, Unknown=0, NotChecked=0, Total=38220 [2018-12-03 15:16:34,508 INFO L87 Difference]: Start difference. First operand 409 states and 571 transitions. Second operand 166 states. [2018-12-03 15:16:36,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:16:36,730 INFO L93 Difference]: Finished difference Result 420 states and 586 transitions. [2018-12-03 15:16:36,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-12-03 15:16:36,730 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 408 [2018-12-03 15:16:36,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:16:36,732 INFO L225 Difference]: With dead ends: 420 [2018-12-03 15:16:36,732 INFO L226 Difference]: Without dead ends: 418 [2018-12-03 15:16:36,733 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 897 GetRequests, 651 SyntacticMatches, 52 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26914 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=15789, Invalid=22431, Unknown=0, NotChecked=0, Total=38220 [2018-12-03 15:16:36,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2018-12-03 15:16:36,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 414. [2018-12-03 15:16:36,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2018-12-03 15:16:36,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 578 transitions. [2018-12-03 15:16:36,741 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 578 transitions. Word has length 408 [2018-12-03 15:16:36,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:16:36,741 INFO L480 AbstractCegarLoop]: Abstraction has 414 states and 578 transitions. [2018-12-03 15:16:36,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-12-03 15:16:36,741 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 578 transitions. [2018-12-03 15:16:36,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2018-12-03 15:16:36,743 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:16:36,743 INFO L402 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 82, 1, 1, 1] [2018-12-03 15:16:36,743 INFO L423 AbstractCegarLoop]: === Iteration 84 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:16:36,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:16:36,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1421094592, now seen corresponding path program 82 times [2018-12-03 15:16:36,744 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:16:36,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:16:36,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:16:36,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:16:36,744 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:16:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:16:40,051 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 15:16:40,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:16:40,051 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:16:40,051 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:16:40,051 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:16:40,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:16:40,052 INFO 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 15:16:40,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:16:40,060 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:16:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:16:40,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:16:45,404 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 15:16:45,404 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:16:50,477 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 15:16:50,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:16:50,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84, 84] total 196 [2018-12-03 15:16:50,496 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:16:50,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-12-03 15:16:50,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-12-03 15:16:50,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15903, Invalid=22709, Unknown=0, NotChecked=0, Total=38612 [2018-12-03 15:16:50,499 INFO L87 Difference]: Start difference. First operand 414 states and 578 transitions. Second operand 168 states. [2018-12-03 15:16:52,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:16:52,796 INFO L93 Difference]: Finished difference Result 425 states and 593 transitions. [2018-12-03 15:16:52,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-12-03 15:16:52,797 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 413 [2018-12-03 15:16:52,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:16:52,799 INFO L225 Difference]: With dead ends: 425 [2018-12-03 15:16:52,799 INFO L226 Difference]: Without dead ends: 423 [2018-12-03 15:16:52,800 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 659 SyntacticMatches, 54 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27471 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=15903, Invalid=22709, Unknown=0, NotChecked=0, Total=38612 [2018-12-03 15:16:52,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-12-03 15:16:52,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 419. [2018-12-03 15:16:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2018-12-03 15:16:52,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 585 transitions. [2018-12-03 15:16:52,806 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 585 transitions. Word has length 413 [2018-12-03 15:16:52,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:16:52,807 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 585 transitions. [2018-12-03 15:16:52,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-12-03 15:16:52,807 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 585 transitions. [2018-12-03 15:16:52,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2018-12-03 15:16:52,808 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:16:52,808 INFO L402 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 83, 1, 1, 1] [2018-12-03 15:16:52,809 INFO L423 AbstractCegarLoop]: === Iteration 85 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:16:52,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:16:52,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1843872113, now seen corresponding path program 83 times [2018-12-03 15:16:52,809 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:16:52,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:16:52,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:16:52,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:16:52,810 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:16:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:16:55,885 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 15:16:55,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:16:55,885 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:16:55,885 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:16:55,885 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:16:55,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:16:55,886 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 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 15:16:55,897 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:16:55,897 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:16:56,123 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2018-12-03 15:16:56,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:16:56,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:17:01,505 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 15:17:01,505 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:17:06,606 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 15:17:06,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:17:06,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 197 [2018-12-03 15:17:06,625 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:17:06,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-12-03 15:17:06,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-12-03 15:17:06,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16017, Invalid=22989, Unknown=0, NotChecked=0, Total=39006 [2018-12-03 15:17:06,629 INFO L87 Difference]: Start difference. First operand 419 states and 585 transitions. Second operand 170 states. [2018-12-03 15:17:08,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:17:08,890 INFO L93 Difference]: Finished difference Result 430 states and 600 transitions. [2018-12-03 15:17:08,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-12-03 15:17:08,890 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 418 [2018-12-03 15:17:08,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:17:08,892 INFO L225 Difference]: With dead ends: 430 [2018-12-03 15:17:08,892 INFO L226 Difference]: Without dead ends: 428 [2018-12-03 15:17:08,893 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 667 SyntacticMatches, 56 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28028 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=16017, Invalid=22989, Unknown=0, NotChecked=0, Total=39006 [2018-12-03 15:17:08,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2018-12-03 15:17:08,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 424. [2018-12-03 15:17:08,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-12-03 15:17:08,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 592 transitions. [2018-12-03 15:17:08,902 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 592 transitions. Word has length 418 [2018-12-03 15:17:08,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:17:08,902 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 592 transitions. [2018-12-03 15:17:08,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-12-03 15:17:08,902 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 592 transitions. [2018-12-03 15:17:08,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-12-03 15:17:08,905 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:17:08,905 INFO L402 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 84, 1, 1, 1] [2018-12-03 15:17:08,905 INFO L423 AbstractCegarLoop]: === Iteration 86 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:17:08,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:17:08,905 INFO L82 PathProgramCache]: Analyzing trace with hash 31012192, now seen corresponding path program 84 times [2018-12-03 15:17:08,906 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:17:08,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:17:08,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:17:08,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:17:08,906 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:17:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:17:12,117 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 15:17:12,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:17:12,117 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:17:12,117 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:17:12,117 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:17:12,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:17:12,117 INFO 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 15:17:12,125 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:17:12,125 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:17:12,231 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:17:12,231 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:17:12,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:17:17,787 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 15:17:17,788 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:17:22,931 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 15:17:22,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:17:22,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86, 86] total 198 [2018-12-03 15:17:22,951 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:17:22,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-12-03 15:17:22,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-12-03 15:17:22,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16131, Invalid=23271, Unknown=0, NotChecked=0, Total=39402 [2018-12-03 15:17:22,955 INFO L87 Difference]: Start difference. First operand 424 states and 592 transitions. Second operand 172 states. [2018-12-03 15:17:25,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:17:25,218 INFO L93 Difference]: Finished difference Result 435 states and 607 transitions. [2018-12-03 15:17:25,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-12-03 15:17:25,218 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 423 [2018-12-03 15:17:25,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:17:25,220 INFO L225 Difference]: With dead ends: 435 [2018-12-03 15:17:25,220 INFO L226 Difference]: Without dead ends: 433 [2018-12-03 15:17:25,221 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 675 SyntacticMatches, 58 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28585 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=16131, Invalid=23271, Unknown=0, NotChecked=0, Total=39402 [2018-12-03 15:17:25,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2018-12-03 15:17:25,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 429. [2018-12-03 15:17:25,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2018-12-03 15:17:25,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 599 transitions. [2018-12-03 15:17:25,229 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 599 transitions. Word has length 423 [2018-12-03 15:17:25,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:17:25,230 INFO L480 AbstractCegarLoop]: Abstraction has 429 states and 599 transitions. [2018-12-03 15:17:25,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-12-03 15:17:25,230 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 599 transitions. [2018-12-03 15:17:25,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2018-12-03 15:17:25,232 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:17:25,232 INFO L402 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 85, 1, 1, 1] [2018-12-03 15:17:25,232 INFO L423 AbstractCegarLoop]: === Iteration 87 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:17:25,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:17:25,232 INFO L82 PathProgramCache]: Analyzing trace with hash 2113756881, now seen corresponding path program 85 times [2018-12-03 15:17:25,232 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:17:25,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:17:25,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:17:25,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:17:25,233 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:17:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:17:28,486 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 15:17:28,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:17:28,486 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:17:28,486 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:17:28,487 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:17:28,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:17:28,487 INFO 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 15:17:28,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:17:28,497 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:17:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:17:28,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:17:34,009 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 15:17:34,009 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:17:39,119 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 15:17:39,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:17:39,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87, 87] total 199 [2018-12-03 15:17:39,139 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:17:39,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-12-03 15:17:39,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-12-03 15:17:39,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16245, Invalid=23555, Unknown=0, NotChecked=0, Total=39800 [2018-12-03 15:17:39,143 INFO L87 Difference]: Start difference. First operand 429 states and 599 transitions. Second operand 174 states. [2018-12-03 15:17:41,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:17:41,617 INFO L93 Difference]: Finished difference Result 440 states and 614 transitions. [2018-12-03 15:17:41,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-12-03 15:17:41,618 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 428 [2018-12-03 15:17:41,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:17:41,619 INFO L225 Difference]: With dead ends: 440 [2018-12-03 15:17:41,619 INFO L226 Difference]: Without dead ends: 438 [2018-12-03 15:17:41,620 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 941 GetRequests, 683 SyntacticMatches, 60 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29142 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=16245, Invalid=23555, Unknown=0, NotChecked=0, Total=39800 [2018-12-03 15:17:41,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2018-12-03 15:17:41,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 434. [2018-12-03 15:17:41,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-12-03 15:17:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 606 transitions. [2018-12-03 15:17:41,628 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 606 transitions. Word has length 428 [2018-12-03 15:17:41,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:17:41,628 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 606 transitions. [2018-12-03 15:17:41,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-12-03 15:17:41,628 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 606 transitions. [2018-12-03 15:17:41,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2018-12-03 15:17:41,630 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:17:41,630 INFO L402 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 86, 1, 1, 1] [2018-12-03 15:17:41,630 INFO L423 AbstractCegarLoop]: === Iteration 88 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:17:41,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:17:41,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1344375808, now seen corresponding path program 86 times [2018-12-03 15:17:41,630 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:17:41,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:17:41,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:17:41,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:17:41,631 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:17:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:17:45,246 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 15:17:45,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:17:45,247 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:17:45,247 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:17:45,247 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:17:45,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:17:45,247 INFO 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 15:17:45,256 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:17:45,256 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:17:45,481 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 87 check-sat command(s) [2018-12-03 15:17:45,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:17:45,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:17:51,216 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 15:17:51,216 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:17:56,425 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 15:17:56,446 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:17:56,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88, 88] total 200 [2018-12-03 15:17:56,446 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:17:56,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-12-03 15:17:56,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-12-03 15:17:56,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16359, Invalid=23841, Unknown=0, NotChecked=0, Total=40200 [2018-12-03 15:17:56,451 INFO L87 Difference]: Start difference. First operand 434 states and 606 transitions. Second operand 176 states. [2018-12-03 15:17:58,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:17:58,986 INFO L93 Difference]: Finished difference Result 445 states and 621 transitions. [2018-12-03 15:17:58,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-12-03 15:17:58,986 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 433 [2018-12-03 15:17:58,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:17:58,988 INFO L225 Difference]: With dead ends: 445 [2018-12-03 15:17:58,988 INFO L226 Difference]: Without dead ends: 443 [2018-12-03 15:17:58,989 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 15:17:58,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2018-12-03 15:17:58,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 439. [2018-12-03 15:17:58,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2018-12-03 15:17:58,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 613 transitions. [2018-12-03 15:17:58,997 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 613 transitions. Word has length 433 [2018-12-03 15:17:58,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:17:58,997 INFO L480 AbstractCegarLoop]: Abstraction has 439 states and 613 transitions. [2018-12-03 15:17:58,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-12-03 15:17:58,997 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 613 transitions. [2018-12-03 15:17:58,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2018-12-03 15:17:58,999 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:17:58,999 INFO L402 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 87, 1, 1, 1] [2018-12-03 15:17:58,999 INFO L423 AbstractCegarLoop]: === Iteration 89 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:17:59,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:17:59,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1466547151, now seen corresponding path program 87 times [2018-12-03 15:17:59,000 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:17:59,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:17:59,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:17:59,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:17:59,001 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:17:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:18:02,597 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 15:18:02,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:18:02,597 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:18:02,598 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:18:02,598 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:18:02,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:18:02,598 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:18:02,608 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:18:02,609 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:18:02,715 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:18:02,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:18:02,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:18:08,543 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 15:18:08,543 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:18:13,823 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 15:18:13,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:18:13,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 201 [2018-12-03 15:18:13,844 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:18:13,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 178 states [2018-12-03 15:18:13,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2018-12-03 15:18:13,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16473, Invalid=24129, Unknown=0, NotChecked=0, Total=40602 [2018-12-03 15:18:13,847 INFO L87 Difference]: Start difference. First operand 439 states and 613 transitions. Second operand 178 states. [2018-12-03 15:18:16,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:18:16,478 INFO L93 Difference]: Finished difference Result 450 states and 628 transitions. [2018-12-03 15:18:16,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-12-03 15:18:16,478 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 438 [2018-12-03 15:18:16,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:18:16,480 INFO L225 Difference]: With dead ends: 450 [2018-12-03 15:18:16,480 INFO L226 Difference]: Without dead ends: 448 [2018-12-03 15:18:16,481 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 963 GetRequests, 699 SyntacticMatches, 64 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30256 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=16473, Invalid=24129, Unknown=0, NotChecked=0, Total=40602 [2018-12-03 15:18:16,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2018-12-03 15:18:16,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 444. [2018-12-03 15:18:16,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2018-12-03 15:18:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 620 transitions. [2018-12-03 15:18:16,489 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 620 transitions. Word has length 438 [2018-12-03 15:18:16,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:18:16,489 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 620 transitions. [2018-12-03 15:18:16,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 178 states. [2018-12-03 15:18:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 620 transitions. [2018-12-03 15:18:16,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2018-12-03 15:18:16,491 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:18:16,492 INFO L402 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 88, 1, 1, 1] [2018-12-03 15:18:16,492 INFO L423 AbstractCegarLoop]: === Iteration 90 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:18:16,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:18:16,492 INFO L82 PathProgramCache]: Analyzing trace with hash -841094496, now seen corresponding path program 88 times [2018-12-03 15:18:16,492 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:18:16,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:18:16,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:18:16,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:18:16,493 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:18:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:18:20,257 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 15:18:20,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:18:20,257 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:18:20,257 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:18:20,258 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:18:20,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:18:20,258 INFO 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 15:18:20,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:18:20,266 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:18:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:18:20,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:18:26,332 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 15:18:26,332 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:18:31,516 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 15:18:31,535 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:18:31,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90, 90] total 202 [2018-12-03 15:18:31,535 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:18:31,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-12-03 15:18:31,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-12-03 15:18:31,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16587, Invalid=24419, Unknown=0, NotChecked=0, Total=41006 [2018-12-03 15:18:31,539 INFO L87 Difference]: Start difference. First operand 444 states and 620 transitions. Second operand 180 states. [2018-12-03 15:18:34,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:18:34,297 INFO L93 Difference]: Finished difference Result 455 states and 635 transitions. [2018-12-03 15:18:34,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-12-03 15:18:34,297 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 443 [2018-12-03 15:18:34,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:18:34,299 INFO L225 Difference]: With dead ends: 455 [2018-12-03 15:18:34,299 INFO L226 Difference]: Without dead ends: 453 [2018-12-03 15:18:34,300 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 15:18:34,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2018-12-03 15:18:34,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 449. [2018-12-03 15:18:34,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2018-12-03 15:18:34,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 627 transitions. [2018-12-03 15:18:34,308 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 627 transitions. Word has length 443 [2018-12-03 15:18:34,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:18:34,309 INFO L480 AbstractCegarLoop]: Abstraction has 449 states and 627 transitions. [2018-12-03 15:18:34,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-12-03 15:18:34,309 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 627 transitions. [2018-12-03 15:18:34,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2018-12-03 15:18:34,310 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:18:34,311 INFO L402 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 89, 1, 1, 1] [2018-12-03 15:18:34,311 INFO L423 AbstractCegarLoop]: === Iteration 91 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:18:34,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:18:34,311 INFO L82 PathProgramCache]: Analyzing trace with hash -556273263, now seen corresponding path program 89 times [2018-12-03 15:18:34,311 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:18:34,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:18:34,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:18:34,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:18:34,312 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:18:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:18:38,089 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 15:18:38,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:18:38,090 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:18:38,090 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:18:38,090 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:18:38,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:18:38,090 INFO 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 15:18:38,099 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:18:38,099 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:18:38,342 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 90 check-sat command(s) [2018-12-03 15:18:38,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:18:38,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:18:44,382 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 15:18:44,382 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:18:49,655 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 15:18:49,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:18:49,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91, 91] total 203 [2018-12-03 15:18:49,674 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:18:49,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 182 states [2018-12-03 15:18:49,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2018-12-03 15:18:49,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16701, Invalid=24711, Unknown=0, NotChecked=0, Total=41412 [2018-12-03 15:18:49,678 INFO L87 Difference]: Start difference. First operand 449 states and 627 transitions. Second operand 182 states. [2018-12-03 15:18:52,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:18:52,445 INFO L93 Difference]: Finished difference Result 460 states and 642 transitions. [2018-12-03 15:18:52,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-12-03 15:18:52,446 INFO L78 Accepts]: Start accepts. Automaton has 182 states. Word has length 448 [2018-12-03 15:18:52,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:18:52,448 INFO L225 Difference]: With dead ends: 460 [2018-12-03 15:18:52,448 INFO L226 Difference]: Without dead ends: 458 [2018-12-03 15:18:52,449 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 985 GetRequests, 715 SyntacticMatches, 68 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31370 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=16701, Invalid=24711, Unknown=0, NotChecked=0, Total=41412 [2018-12-03 15:18:52,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2018-12-03 15:18:52,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 454. [2018-12-03 15:18:52,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2018-12-03 15:18:52,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 634 transitions. [2018-12-03 15:18:52,457 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 634 transitions. Word has length 448 [2018-12-03 15:18:52,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:18:52,457 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 634 transitions. [2018-12-03 15:18:52,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 182 states. [2018-12-03 15:18:52,458 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 634 transitions. [2018-12-03 15:18:52,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2018-12-03 15:18:52,459 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:18:52,459 INFO L402 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 90, 1, 1, 1] [2018-12-03 15:18:52,460 INFO L423 AbstractCegarLoop]: === Iteration 92 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:18:52,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:18:52,460 INFO L82 PathProgramCache]: Analyzing trace with hash 846305600, now seen corresponding path program 90 times [2018-12-03 15:18:52,460 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:18:52,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:18:52,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:18:52,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:18:52,461 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:18:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:18:56,387 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 15:18:56,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:18:56,388 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:18:56,388 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:18:56,388 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:18:56,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:18:56,388 INFO 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 15:18:56,399 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:18:56,399 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:18:56,514 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:18:56,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:18:56,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:19:02,662 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 15:19:02,662 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:19:07,954 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 15:19:07,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:19:07,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92, 92] total 204 [2018-12-03 15:19:07,973 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:19:07,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 184 states [2018-12-03 15:19:07,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2018-12-03 15:19:07,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16815, Invalid=25005, Unknown=0, NotChecked=0, Total=41820 [2018-12-03 15:19:07,978 INFO L87 Difference]: Start difference. First operand 454 states and 634 transitions. Second operand 184 states. [2018-12-03 15:19:11,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:19:11,019 INFO L93 Difference]: Finished difference Result 465 states and 649 transitions. [2018-12-03 15:19:11,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-12-03 15:19:11,019 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 453 [2018-12-03 15:19:11,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:19:11,021 INFO L225 Difference]: With dead ends: 465 [2018-12-03 15:19:11,021 INFO L226 Difference]: Without dead ends: 463 [2018-12-03 15:19:11,022 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 723 SyntacticMatches, 70 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31927 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=16815, Invalid=25005, Unknown=0, NotChecked=0, Total=41820 [2018-12-03 15:19:11,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2018-12-03 15:19:11,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 459. [2018-12-03 15:19:11,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2018-12-03 15:19:11,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 641 transitions. [2018-12-03 15:19:11,029 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 641 transitions. Word has length 453 [2018-12-03 15:19:11,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:19:11,030 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 641 transitions. [2018-12-03 15:19:11,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 184 states. [2018-12-03 15:19:11,030 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 641 transitions. [2018-12-03 15:19:11,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2018-12-03 15:19:11,032 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:19:11,032 INFO L402 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 91, 1, 1, 1] [2018-12-03 15:19:11,032 INFO L423 AbstractCegarLoop]: === Iteration 93 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:19:11,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:19:11,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1516791537, now seen corresponding path program 91 times [2018-12-03 15:19:11,032 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:19:11,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:19:11,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:19:11,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:19:11,033 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:19:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:19:14,744 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 15:19:14,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:19:14,745 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:19:14,745 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:19:14,745 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:19:14,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:19:14,745 INFO 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 15:19:14,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:19:14,753 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:19:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:19:14,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:19:21,150 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 15:19:21,150 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:19:26,214 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 15:19:26,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:19:26,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93, 93] total 205 [2018-12-03 15:19:26,234 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:19:26,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 186 states [2018-12-03 15:19:26,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2018-12-03 15:19:26,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16929, Invalid=25301, Unknown=0, NotChecked=0, Total=42230 [2018-12-03 15:19:26,237 INFO L87 Difference]: Start difference. First operand 459 states and 641 transitions. Second operand 186 states. [2018-12-03 15:19:29,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:19:29,110 INFO L93 Difference]: Finished difference Result 470 states and 656 transitions. [2018-12-03 15:19:29,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-12-03 15:19:29,110 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 458 [2018-12-03 15:19:29,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:19:29,112 INFO L225 Difference]: With dead ends: 470 [2018-12-03 15:19:29,112 INFO L226 Difference]: Without dead ends: 468 [2018-12-03 15:19:29,113 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1007 GetRequests, 731 SyntacticMatches, 72 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32484 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=16929, Invalid=25301, Unknown=0, NotChecked=0, Total=42230 [2018-12-03 15:19:29,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2018-12-03 15:19:29,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 464. [2018-12-03 15:19:29,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2018-12-03 15:19:29,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 648 transitions. [2018-12-03 15:19:29,122 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 648 transitions. Word has length 458 [2018-12-03 15:19:29,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:19:29,122 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 648 transitions. [2018-12-03 15:19:29,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 186 states. [2018-12-03 15:19:29,122 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 648 transitions. [2018-12-03 15:19:29,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2018-12-03 15:19:29,124 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:19:29,124 INFO L402 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 92, 1, 1, 1] [2018-12-03 15:19:29,125 INFO L423 AbstractCegarLoop]: === Iteration 94 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:19:29,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:19:29,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1145864224, now seen corresponding path program 92 times [2018-12-03 15:19:29,125 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:19:29,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:19:29,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:19:29,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:19:29,126 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:19:29,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:19:33,263 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 15:19:33,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:19:33,264 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:19:33,264 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:19:33,264 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:19:33,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:19:33,264 INFO 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 15:19:33,273 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:19:33,273 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:19:33,531 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 93 check-sat command(s) [2018-12-03 15:19:33,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:19:33,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:19:40,022 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 15:19:40,022 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:19:45,293 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 15:19:45,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:19:45,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94, 94] total 206 [2018-12-03 15:19:45,313 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:19:45,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 188 states [2018-12-03 15:19:45,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2018-12-03 15:19:45,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17043, Invalid=25599, Unknown=0, NotChecked=0, Total=42642 [2018-12-03 15:19:45,316 INFO L87 Difference]: Start difference. First operand 464 states and 648 transitions. Second operand 188 states. [2018-12-03 15:19:48,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:19:48,138 INFO L93 Difference]: Finished difference Result 475 states and 663 transitions. [2018-12-03 15:19:48,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-12-03 15:19:48,139 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 463 [2018-12-03 15:19:48,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:19:48,141 INFO L225 Difference]: With dead ends: 475 [2018-12-03 15:19:48,141 INFO L226 Difference]: Without dead ends: 473 [2018-12-03 15:19:48,142 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 15:19:48,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2018-12-03 15:19:48,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 469. [2018-12-03 15:19:48,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2018-12-03 15:19:48,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 655 transitions. [2018-12-03 15:19:48,150 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 655 transitions. Word has length 463 [2018-12-03 15:19:48,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:19:48,151 INFO L480 AbstractCegarLoop]: Abstraction has 469 states and 655 transitions. [2018-12-03 15:19:48,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 188 states. [2018-12-03 15:19:48,151 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 655 transitions. [2018-12-03 15:19:48,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2018-12-03 15:19:48,153 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:19:48,153 INFO L402 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 93, 1, 1, 1] [2018-12-03 15:19:48,153 INFO L423 AbstractCegarLoop]: === Iteration 95 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:19:48,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:19:48,153 INFO L82 PathProgramCache]: Analyzing trace with hash -43146159, now seen corresponding path program 93 times [2018-12-03 15:19:48,153 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:19:48,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:19:48,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:19:48,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:19:48,154 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:19:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:19:52,303 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 15:19:52,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:19:52,303 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:19:52,303 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:19:52,304 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:19:52,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:19:52,304 INFO 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 15:19:52,312 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:19:52,312 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:19:52,437 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:19:52,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:19:52,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:19:58,934 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 15:19:58,934 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:20:04,270 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 15:20:04,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:20:04,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 207 [2018-12-03 15:20:04,289 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:20:04,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 190 states [2018-12-03 15:20:04,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2018-12-03 15:20:04,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17157, Invalid=25899, Unknown=0, NotChecked=0, Total=43056 [2018-12-03 15:20:04,293 INFO L87 Difference]: Start difference. First operand 469 states and 655 transitions. Second operand 190 states. [2018-12-03 15:20:07,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:20:07,139 INFO L93 Difference]: Finished difference Result 480 states and 670 transitions. [2018-12-03 15:20:07,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-12-03 15:20:07,140 INFO L78 Accepts]: Start accepts. Automaton has 190 states. Word has length 468 [2018-12-03 15:20:07,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:20:07,141 INFO L225 Difference]: With dead ends: 480 [2018-12-03 15:20:07,142 INFO L226 Difference]: Without dead ends: 478 [2018-12-03 15:20:07,143 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1029 GetRequests, 747 SyntacticMatches, 76 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33598 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=17157, Invalid=25899, Unknown=0, NotChecked=0, Total=43056 [2018-12-03 15:20:07,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2018-12-03 15:20:07,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 474. [2018-12-03 15:20:07,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 474 states. [2018-12-03 15:20:07,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 662 transitions. [2018-12-03 15:20:07,154 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 662 transitions. Word has length 468 [2018-12-03 15:20:07,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:20:07,154 INFO L480 AbstractCegarLoop]: Abstraction has 474 states and 662 transitions. [2018-12-03 15:20:07,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 190 states. [2018-12-03 15:20:07,154 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 662 transitions. [2018-12-03 15:20:07,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2018-12-03 15:20:07,156 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:20:07,156 INFO L402 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 1, 1, 1] [2018-12-03 15:20:07,157 INFO L423 AbstractCegarLoop]: === Iteration 96 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:20:07,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:20:07,157 INFO L82 PathProgramCache]: Analyzing trace with hash -281174400, now seen corresponding path program 94 times [2018-12-03 15:20:07,157 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:20:07,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:20:07,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:20:07,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:20:07,158 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:20:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:20:11,195 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 15:20:11,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:20:11,195 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:20:11,195 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:20:11,195 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:20:11,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:20:11,195 INFO 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 15:20:11,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:20:11,204 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:20:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:20:11,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:20:18,012 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 15:20:18,012 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:20:23,284 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 15:20:23,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:20:23,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 208 [2018-12-03 15:20:23,303 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:20:23,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2018-12-03 15:20:23,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2018-12-03 15:20:23,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17271, Invalid=26201, Unknown=0, NotChecked=0, Total=43472 [2018-12-03 15:20:23,307 INFO L87 Difference]: Start difference. First operand 474 states and 662 transitions. Second operand 192 states. [2018-12-03 15:20:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:20:26,527 INFO L93 Difference]: Finished difference Result 485 states and 677 transitions. [2018-12-03 15:20:26,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-12-03 15:20:26,527 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 473 [2018-12-03 15:20:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:20:26,529 INFO L225 Difference]: With dead ends: 485 [2018-12-03 15:20:26,529 INFO L226 Difference]: Without dead ends: 483 [2018-12-03 15:20:26,530 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1040 GetRequests, 755 SyntacticMatches, 78 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34155 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=17271, Invalid=26201, Unknown=0, NotChecked=0, Total=43472 [2018-12-03 15:20:26,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2018-12-03 15:20:26,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 479. [2018-12-03 15:20:26,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-12-03 15:20:26,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 669 transitions. [2018-12-03 15:20:26,539 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 669 transitions. Word has length 473 [2018-12-03 15:20:26,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:20:26,539 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 669 transitions. [2018-12-03 15:20:26,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 192 states. [2018-12-03 15:20:26,540 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 669 transitions. [2018-12-03 15:20:26,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2018-12-03 15:20:26,541 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:20:26,542 INFO L402 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 1, 1, 1] [2018-12-03 15:20:26,542 INFO L423 AbstractCegarLoop]: === Iteration 97 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:20:26,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:20:26,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1299338831, now seen corresponding path program 95 times [2018-12-03 15:20:26,542 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:20:26,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:20:26,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:20:26,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:20:26,543 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:20:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat